Prerpints.org logo
Preprint
Review

A Quest for Survival: a Review of Early Biomarkers for Pancreatic Cancer and the Most Effective Approaches at Present

Altmetrics

Downloads

157

Views

58

Comments

0

A peer-reviewed article of this preprint also exists.

Submitted:

18 February 2024

Posted:

19 February 2024

You are already at the latest version

Alerts
Abstract
Pancreatic cancer (PC) is the most lethal type of cancer, it has the lowest 5-year survival rate among all other types of cancers. More than half of PC cases are diagnosed at an advanced stage due to PC’s insidious and non-specific symptoms. Surgery remains the most efficacious treatment option currently available, but only 10-20% of PC cases are resectable upon diagnosis. As of now, the sole biomarker approved by the United States Food and Drug Administration (US-FDA) for PC is carbohydrate antigen 19-9 (CA19-9); however, its use is limited use for early diagnosis. An in-creasing number of studies have investigated a combination of biomarkers. Lately, there has been considerable interest in the application of a liquid biopsy, including the utilization of microRNAs (miRNAs), circulating tumor DNA (ctDNA), and circulating tumor cells (CTCs). Screening for PC is indicated for high-risk patients; studies on new diagnostic models combined with biomarkers for early detection have also shown promising results for the ability of these models and biomarkers to aid clinicians in deciding on whether to start screening. This review seeks to provide a concise overview of the advancements in existing biomarkers and explore novel strategies for the early detection of PC.
Keywords: 
Subject: Medicine and Pharmacology  -   Gastroenterology and Hepatology

1. Introduction

Pancreatic cancer (PC) is currently the most lethal type of cancer, exhibiting the lowest 5-year survival rate among all cancer types. The survival rate is estimated at 8% for all PC stages combined and only 3% when PC is diagnosed at a later stage [1]. More than 50% of PC patients are diagnosed at an advanced stage, at which point there are only limited treatment options due to the highly metastatic nature of this disease [1-3]. According to GLOBOCAN, global statistics indicate that PC leads to approximately 432,000 deaths, with 459,000 new cases reported in 2018 [4]. In contrast to other cancer types with declining rates, PC is expected to rank as the third most common cause of cancer-related fatalities by the year 2025, surpassing even breast cancer [5].
At an early stage, PC rarely shows any symptoms. If there are any symptoms at all, they are mostly non-specific. The common symptoms include weight loss, abdominal pain, steatorrhea, and new-onset diabetes or the deterioration of pre-existing diabetes. In the advance stage, symptoms of jaundice, and light-colored stools, as well as other symptoms caused by the obstruction of the common biliary duct and/or pancreatic duct, will start to appear [6]. It is noteworthy that PC is frequently discovered in autopsy studies due to its subtle and insidious nature [7,8]. Approximately 63% of PCs originate in the head of the pancreas, with those originating in the tail and body accounting for around 12.8% and 9.8% of cases, respectively [3]. Tumors originating from the tail and body tend to be detected at more advanced stages, as they require more time to develop noticeable symptoms.
Imaging studies also plays a role in the detection of PC. They are used to assess the tumor location and size, the vascular involvement, the regional involvement, and the metastatic extent (e.g., liver, lungs, and peritoneum[6]. Ultrasounds lacks the specificity and sensitivity required for the detection of small PC lesions due to the presence of gas in the gastrointestinal tract, making an early diagnosis difficult [9]. A computed tomography (CT) scan with contrast remains the main modality used to diagnose PC; for cancers smaller than 2cm, it has a sensitivity of up to 63 - 77% [10]. In cases where a CT scan yields inconclusive results, magnetic resonance imaging (MRI) can be employed, particularly for isoattenuating PC [11]. However, neither CT scans nor MRI guarantee tumor detection, especially when jaundice is already present. Consequently, an endoscopic ultrasound (EUS) examination has becomes valuable for diagnoses [12]. An EUS has demonstrated diagnostic rates of 45.5% for stage 0 and 81.8% for stage I cancers, surpassing the rates of 9.7% and 63% for CT scans, as well as 9.7% and 39.1% for MRI, respectively [13,14].
A PC patient’s prognosis is primarily determined by utilizing a tumor node metastasis (TNM) staging system.[6]. The American Joint Committee on Cancer (AJCC) classifies the TNM system for PC into four stages: stage I - a localized, resectable tumor, smaller than 2 cm (IA) or, larger than 2 cm but smaller than 4 cm (IB); stage II a larger tumor (>4cm) limited to the pancreas (IIA) or, involving of 1-3 regional lymph nodes (LNs) with a tumor size <4 cm (IIB); stage III - metastasis to ≥4 regional LNs, regardless of the tumor size; and stage IV - distant metastasis [15]. The two most important prognostic factors are the size of the tumor upon detection (<2 cm) and detection at an early stage [16]. Data from the United States National Cancer Institute reveals that only 12% of PC cases are detected at the local stage, which boast a 5-year survival rate of 44%. The 5-year survival rate drastically drops to 15% when the cancer is detected at stage III, which involves the surrounding tissue, and for distant metastasis, the point at which more than half of all patients are detected, the survival rate is only 3% [17]. Surgery remains the most effective treatment for PC when diagnosed early; however, only 10-20% of cases are eligible for a surgical resection upon detection [18,19]. In patients diagnosed with metastatic tumors, the median survival time is only 3 months and 6-9 months for locally advanced stage cancer [20]. There is an urgent need to find diagnostic tools and methods that can detect PC at the earliest stage; our review will highlight novel biomarkers and the feasibility of using them.
Developing pancreatic screening criteria is challenging, and population-based screening is not feasible. In the general population, with no risk stratification applied, the approximate lifetime risk of developing PC up to the age of 70 years is only 1.3% [20]. Screening the general population is not cost-effective, and there is no supporting evidence indicating a reduction in mortality [21,22]. Likewise, the US Preventive Service Task Force advises against screening asymptomatic patients [21,23,24].
Routine screening is recommended for individuals with inherited genetic abnormali-ties, such as a familial history of PC or Peutz-Jeghers syndrome [25]. Researchers are currently engaged in an ongoing debate regarding the ideal age to commence the initial screening process. Generally, it is suggested that screening should commence around the age of 40-50 years or 10-15 years earlier than the age of onset observed in family members diagnosed with PC [26]. The International Cancer of the Pancreas Screening Consortium recommends that surveillance should begin at 50 years old or 10 years earlier than the youngest age that a blood relative with PC was diagnosed. Screening is performed every 3 years, or every 3-6 months if there are abnormalities [26,27].
The NCCN recommends an EUS as a screening tool. In a study of 78 high-risk individuals, CT and an EUS successfully identified eight patients with PC, six patients with an intraductal papillary mucinous neoplasm (IPMN), and three patients with an extra pancreatic neoplasm [28-30]. Canto et al. reported that an EUS, MRI, and CT could detect pancreatic lesions in asymptomatic patients, with the detection rates reaching 42.6%, 33.3%, and 11.0%, respectively [25]. According to the International Cancer of the Pancreas Screening Consortium, three-fourths of experts agree that an EUS and MRI are the preferred screening methods over CT, which is attributed to their higher detection rates. However, there was no consensus on the optimal frequency for conducting screening [23].
Several unhealthy lifestyles and living habits have been linked to an increased risk of developing PC. Cigarette smoking has been documented to elevate the risk of PC by two to three times. [31]. A heavy alcohol intake has been described as an independent risk factor that contributes to the PC risk in men (hazard ratio (HR) = 1.69, 95% CI: 1.21–2.37) [32,33]. Another significant risk factor is diabetes mellitus (DM). An association between DM and PC has been observed since the 1800s; however, the exact mechanism is still not fully understood [34,35]. The prevalence of DM in PC patients ranges from 4 to 65% [36-38]. In a study conducted by Pannala et al., 47% of the PC cases were identified in individuals with diabetes mellitus (DM), as opposed to the control group, where only 7% had DM. Notably, 74% of those with DM in the PC group had new onset diabetes. [39]. A disturbance in glucose homeostasis is universally observed in PC patients and pancreatic ductal adenocarcinoma (PDAC) is recognized as the most consistent diabetogenic cause in humans, making it the most common phenotypic trait of PC [40]. Abnormalities in fasting blood glucose levels have been detected 30-36 months before a PC diagnosis, progressively increasing up to 126 mg/dL approximately 6-12 months before the cancer diagnosis [41]. Another study also reported that the mean interval between the onset of diabetes and PC is 10 months, ranging from 5 to 29 months [42]. A clinical diagnostic model known as the enriching new-onset diabetes for PC (ENDPAC) model, which utilizes three parameters (age, changes in blood glucose, and changes in body weight), successfully identified patients who developed PC within 3 years of diabetes onset, with an AUC of 0.87, a sensitivity of 80%, and a specificity of 80% [43]. Another clinical model established by the Peking Union Medical College Hospital (PUMCH), that incorporated 10 risk factors (gender, age, alcoholic intake, smoking, diabetes mellitus history, high meat consumption, a family history of PC, chronic pancreatitis, cholelithiasis history, and cholecystitis history), achieved a sensitivity of 88.9%, a specificity of 97.6%, and an AUC of 0.98. [44].

2. Current Biomarkers

The only biomarker currently accepted by the FDA and the National Comprehensive Cancer Network guidelines for PC is carbohydrate antigen 19-9 (CA19-9) [28,29]. Although CA19-9 can serve as a prognostic factor, its utility for early diagnosis and screening is limited [45,46]. The ESMO clinical guidelines for PC explicitly state that CA19-9 is not effective as a screening tool [6]. Previous studies have stated that CA19-9 has a mean sensitivity of 78.2% and a specificity of 82.8% for identifying pancreatic carcinoma [47]. Elevated CA19-9 levels are also observed in various other tumor types, including colorectal cancer, cholangiocarcinoma, liver cancer, and gastric cancer. Furthermore, in some benign conditions, such as obstructive jaundice and, cirrhosis, this tumor marker also shows elevated levels [14,48]. Because CA19-9 is a sialylated Lewis antigen blood group, people in the Lewis-antigen-negative blood group will not synthesize it. It has been estimated that up to 10% of people do not express Lewis antigens [49,50]. Notably, a recent study by Liu et al. reported that individuals lacking Lewis antigens experienced poorer outcomes when diagnosed with PC, including higher metastatic rates [51].
The second most common biomarker used for PC is the carcinoembryonic antigen (CEA). Its reported sensitivity and specificity are 44.2% and 84.8%, respectively [47]. Similar to CA19-9, the CEA is predominantly utilized as a prognostic marker for PC. Elevated CEA levels have been observed in 30-60% of PC patients [52]. The CEA is also found in other types of cancers, including those affecting the colon, breast, lung, and thyroid. When used as a solitary biomarker, the CEA exhibits a sensitivity of 43% and a specificity of 82%, which is even lower than that of CA19-9 [53]. Moreover, the CEA can be detected in non-cancer diseases, such as in cigarette smokers, people with cholecystitis, liver cirrhosis, pancreatitis, inflammatory bowel disease, or COVID-19; and people using medications such as orlistat [54,55].
CA19-9 and the CEA can also serve as tools for patient stratification during diagnosis. CA19-9 can act as a predictor of lymph node metastasis, with a cut-off value of 400 U/mL [56]. A recent study conducted by Esen et al. indicated that CA19-9 alone is effective in distinguishing N0 from N2 patients, although it cannot identify N1 patients [57]. However, it has been noted that utilizing a CA19-9/CEA ratio can differentiate whether a patient is a N0, N1, or N2 patient. The reported sensitivity and specificity of the CA19-9/CEA ratio, with a cut-off value of 27.18, are 79.4% and 80.4%, respectively [57]. The capability of differentiating N0 from N1 tumors would be a valuable tool, given that N0 patients have a higher likelihood of undergoing a complete surgical resection.

3. Novel Biomarkers

3.1. Proteomic Biomarkers

Emerging protein biomarkers have demonstrated the potential to detect early-stage PC. Leucine-rich alpha-2 glycoprotein 1 (LRG1) is a glycoprotein that is part of the leucine-rich repeat (LRR) family of proteins. Its primary functions include an involvement in protein interactions, signal transduction, and cell adhesion and development, as well as the facilitation of new blood vessel formation. An elevated expression of LRG1 has been associated with a poor survival and an advanced tumor stage. Moreover, LRG1 has been implicated in promoting the viability, proliferation, and invasion of pancreatic tumor cells [58-62]. Matrix metalloproteinases (MMPs) form a group of proteases recognized for their capability to degrade extracellular matrix components, including gelatinase B (MMP-9), which is acknowledged for digesting the primary constituent of the basement membrane (type IV collagen). The degradation of the extracellular matrix and basement membranes is pivotal in cancer invasion and metastasis, indicating that changes in the matrix metalloproteinase (MMP) activity within the tumor environment likely play a role in the progression of PC. However, despite its role, circulating MMP-9 has been reported as an inferior marker for PC when compared to CA19-9. Even when both markers are combined, the diagnostic accuracy does not improve [63]. The clinical relevance of MMP-9 concerning the survival, metastasis, and tumor stage has been observed diversely in various studies [64]. Tissue inhibitors of metalloproteinases (TIMPs) belong to another class of metalloproteinases capable of binding to MMPs and, thereby exerting inhibitory and activating effects on MMPs and potentially being involved in tumor progression [63]. TIMP-1, which is typically expressed to regulate cell proliferation and apoptosis, has been identified as a potential biomarker for a PC diagnosis, with a sensitivity of 47.1%, a specificity of 69.2%, and an AUC of 0.64 [63,65]. Transthyretin (TTR), a carrier of thyroid hormones (thyroxin and tri-iodothyronine), has been found to increase by more than 1.5-fold in the serum of PDAC patients compared to normal controls. This increase is associated with a sensitivity of 90.5%, a specificity of 47.6%, and an AUC of 0.75 [66]. Intercellular adhesion molecule 1 (ICAM-1), a glycoprotein that plays a role in cell adhesion and act as a macrophage chemoattractant, has been assessed in multiple studies as a potential early diagnostic tool for PC. By using a cut-off value of 878.5 u/mL, ICAM-1 exhibited a sensitivity, specificity, and AUC of 82%, 82.26%, and 0.851, respectively [67]. Osteoprotegerin (OPG), known for its role in bone homeostasis, has emerged as a potential biomarker for the early detection of PC. Shi, et al. reported that OPG is upregulated in cancerous pancreatic tissue, with an even higher expression observed in patients experiencing new-onset diabetes. [68-70].
Chemokines, also known as chemotactic cytokines, constitute a group of proteins that regulate the migration, adhesion, growth, activation, and differentiation of leukocytes. They are categorized into four groups based on the key cysteine positions: CC, CXC, CX3C, and XC [71,72]. Chemokines play a pivotal role in the modulation of inflammation, infection, immune responses, tissue injury, and various pathological processes, including the development of malignancies [73,74]. The expression of the CXCL-1 chemokine in PC tissues, in both the cytoplasm and stroma, was notably elevated (41.88% and 40.63%, respectively) compared to normal tissues (p= 0.008, and p = 0.002, respectively). The CXCL-1 expression in the cytoplasm was associated with the tumor status, nodal spread, and distant metastasis. Additionally, a high CXCL-1 level in the stroma was correlated with perineural invasion, the tumor classification, and the TNM stage. Elevated CXCL-1 has been identified as an independent prognostic factor for PC and may serve as a potential therapeutic target and prognostic marker [75]. Zhang et al. reported an association between CXCR-4/CXCL12 and tumor invasion and metastasis. Their study investigated the relationship between the expression of CXCR-4/CXCL12 and vascular endothelial growth factor-C (VEGF-C), Ki-67, matrix metalloproteinase 2 (MMP-2), and β-catenin. The expression of CXCR-4 (CXCL12) was elevated in PC cells (56.7% (86.7%)), adjacent non-cancerous cells (50.0% (85.0%)), and the lymph nodes (53.3% (80.0%)) in comparison to normal controls. [76]. CCL-20, a chemotactic cytokine responsible for recruiting inflammatory cells, has been demonstrated to enhance the migration of PC cells. Kimsey et al. demonstrated that increasing the CCL-20 concentration led to a dose-dependent increase in the PC invasion of type IV collagen [77]. Yet, there is a limited understanding of the efficacy of assessing chemokine concentrations in the detection of early-stage PC. There is currently a lack of clinical research investigating chemokines as early biomarkers for the disease.
Several studies have proposed the use of multiple biomarkers or biomarker panels for early diagnosis, as outlined in Table 1. The use of a single tumor marker is reported to have a high probability of false positives and false negatives [78,79]. Park, et al. were able to report a sensitivity of 82.5%, a specificity of 92.1%, and an AUC of 0.93 (p < 0.01) when using a proteomic multi-marker panel that included LRG1, TTR, and CA19-9, which were 10% higher compared to the sensitivity, specificity, and AUC obtained when using CA19-9 alone [80]. Another study that employed a panel of three biomarkers (CA 19-9, ICAM-1, and osteoprotegerin (OPG)) successfully discriminated healthy patients from those with PDAC, achieving a sensitivity of 88%, a specificity of 90%, and an AUC of 0.93 [81]. In a Korean study, Kim et al. developed a new biomarker combination consisting of apolipoprotein A (ApoA1), CA125, CA19-9, the CEA, ApoA2, and TTR, with a sensitivity, specificity, and area under the curve of 93%, 96%, and 0.993, respectively [82]. Interestingly, all six biomarkers used are part of a pan-diagnostic kit that is commercially available in Korea to diagnose seven cancers:, hepatocellular carcinoma, breast cancer, lung cancer, gastric cancer, colon cancer, prostate cancer, and ovarian cancer. In a case-control study conducted by Mellby et al., the differentiation between stages I and II and normal controls yielded a sensitivity and specificity of 94% and 95%, respectively. The biomarker signatures, comprising 29 biomarkers, demonstrated an AUC of 0.96 [83].
Micro-RNA (miRNA) is single-stranded RNA that was discovered in 1993 and that, consists of 19-25 nucleotides [84,85]. Although they are not translated into proteins, miRNAs, which are a type of non-coding RNA, play a crucial role in the development and function of the normal human body, influencing processes such as cell division, differentiation, apoptosis, and angiogenesis. miRNAs can be classified based on their location (cytoplasmic or nuclear) and length, with small (<200 base-pairs) or long (>200 base-pairs) miRNAs [45,86]. miRNAs have been associated with tumorgenesis and progression, impacting apoptosis escape, the epithelial-mesenchymal transition (EMT), invasion, and the clinical outcomes. The EMT is a phenomenon wherein epithelial cells undergo a transformation, losing their cell-to-cell adhesion and acquiring invasive characteristics akin to mesenchymal cells. This process plays a crucial role in the metastasis of PC [87,88].
The expression of miRNAs is influenced by DNA alterations such as deletion, amplification, translocation, and integration during the process of carcinogenesis. Consequently, certain cancers may result in the detection or overexpression of miRNAs, making these miRNAs potential biomarkers [45]. Various methods, including reverse transcription-quantitative PCR (RT-qPCR), in situ hybridization, next-generation sequencing, and miRNA microarrays, can be employed to detect miRNAs in blood serum, plasma, cells, and tissues [29,88,89]. In a comprehensive four-stage study utilizing qRT-PCR assays, Zhou et al. identified a six-miRNA signature (miR-122-5p, miR-125b-5p, miR-192-5p, miR-193b-3p, miR-221-3p, and miR-27b-3p) that was capable of distinguishing PC patients from normal controls, achieving an AUC of 0.977 (95% CI: 0.894–0.979; sensitivity = 88.7%; and specificity = 89.1%) [90]. Additionally, they reported that miR-125b-5p could serve as an independent biomarker for predicting the survival rates of PC patients.
Serum miR-25 has been reported to be overexpressed in patients with PDAC. Zhang, et al. reported that miR-25 in pancreatic duct epithelial cells can be maturated in an excessive amount by cigarette smoke condensate (CSCC) [91]. High levels of miR-25, and miR 25-3p suppress PH domain leucine-rich repeat protein phosphatase 2 (PHLPP2), which results in the malignant phenotype of pancreatic cells via the activation of oncogenic AKT-p70S6K signaling. The overexpression of miR-25-3p is correlated with a worse prognosis in PC patients [91]. The overexpression of miR-25 has also been reported in gastric cancer, lung cancer, and cholangiocarcinoma; other studies have suggested that miR-25 serves as a tumor sup-pressor in thyroid cancer and colon cancer [92-96]. When miR-25 was combined with CA19-9 to differentiate PC patients from normal controls, an AUC-ROC of 0.985, a sensitivity of 97.5%, and a specificity of 90.11% were achieved. For the identification of stage I and II tumors, the combination of miR-25 and CA19-9 accurately detected 40 out of 42 patients (95.24%). These results imply that miR-25 could potentially function as a novel biomarker for the early detection of PC [97].
Schultz et al., successfully identified two panels of miRNAs that are dysregulated in PC [98]. Panel 1 consisted of miR-145, miR-150, miR-223, and miR-636 and Panel 2 consisted of miR-26b, miR-34a, miR-122, miR-126, miR-145, miR-150, miR-223, miR-505, miR-636, and miR-885.5p. These miRNA panels were capable of distinguishing PC patients from healthy subjects. Using Panel 1, the study attained an AUC of 0.86 (95% CI: 0.82-0.90), a sensitivity of 0.85 (95% CI: 0.79-0.90), and a specificity of 0.64 (95% CI: 0.57-0.71). Panel 2 yielded an AUC of 0.93 (95% CI: 0.90-0.96), a sensitivity of 0.85 (95% CI: 0.79-0.90), and a specificity of 0.85 (95% CI: 0.80-0.85). Interestingly, when combined with CA19-9, both panels were able to detect PC stages IA-IIB with the following performance; Panel 1 with an AUC of 0.83 (95% CI: 0.76-0.90) and; Panel 2 with an AUC of 0.91 (95% CI: 0.86-0.95). In a similar investigation conducted by Johansen et al., four panels were employed, namely Panel I (comprising seven miRNAs), Panel II (comprising nine miRNAs), Panel III (comprising five miRNAs), and Panel IV (comprising twelve miRNAs). The patients diagnosed with PC in Panels I and II were contrasted with a combined group of individuals with chronic pancreatitis and those who were healthy. Conversely, the patients with PC in Panels III and IV were compared specifically to healthy participants (refer to Table 2). Panels I and III were designed to be robust to technical variation, and Panels II and IV included all the significant miRNAs from a multivariate model, thus representing the upper limit in terms of training [99]. The best panel for discriminating stages I and II PC from healthy subjects was Panel II combined with serum CA19-9, which exhibited a sensitivity of 0.77 (0.69-0.84), a specificity of 0.94 (0.90-0.96), and an AUC of 0.93 (0.90-0.96). It is noteworthy that the aforementioned studies did not share any miRNAs in their panels, except for miR-25.
In addition to their presence in serum and pancreatic tissue samples, miRNAs are also present in feces, urine, and saliva. MiR-143, miR-223, and miR-30 can be detected in urine even in stage I cancer. The joint utilization of miR-143 and miR-30 exhibited a sensitivity and specificity of 83.3% and 96.2%, respectively, with an AUC of 0.92 [100,101]. Assessing the miR-1246 and miR-4644 levels in saliva has been studied to differentiate PC patients from healthy controls, yielding AUC values for the ROC curves of 0.814 (p = 0.008) and 0.763 (p = 0.026), respectively. Combining miR-1246 and miR-4644 increased the AUC to 0.833 (p = 0.005) [102]. Salivary miRNAs were reported to be stable due to the protection provided by exosomes. In the stool samples of PC patients, miR-21 and miR-155 exhibited overexpression (p = 0.0049 and p = 0.0112, respectively), while miR-216 showed lower expression levels (p = 0.0002). The combination of miR-21, miR-155, and miR-216 for PC screening demonstrated a sensitivity of 83.3%, a specificity of 83.3%, and an AUC of 0.866 (95% CI: 0.7722-0.9612) [103].

3.2. Circulating DNA

Circulating tumor DNA (ctDNA) was first described in 1948, and it has been postulated that the DNA release via the necrosis, apoptosis, and lysis of circulating tumor cells (CTCs) and micro-metastasis contributes to the presence of ctDNA [104-106]. ctDNA comprises 170-181 base pairs and is present in body fluids at very low concentrations, ranging from 1 to 100 ng/mL, depending on the type and tumor burden [79,106]. Due to its low concentration in body fluids, detecting ctDNA requires methods with a high analytical sensitivity and specificity. The methods used to detect ctDNA include real-time PCR, automatic sequencing, mass spectrometry genotyping, next-generation sequencing (NGS), and digital PCR platforms (such as digital droplet PCR, (ddPCR)). The sensitivity of these methods greatly varies, ranging between 0.01% and 15% [107-110].
ctDNA levels have been reported to be elevated in patients with PC. In a study by Shapiro et al., ctDNA levels as low as 25 ng/mL were detected by utilizing radioimmunoassay DNA quantification, with DNA levels exceeding 100 ng/mL being considered the upper normal limit [111]. The KRAS gene has received significant attention in terms of ctDNA mutations because it is highly mutated in PC [108]. An assessment of samples from 26 PC patients for 54 genes revealed that KRAS, TP53, APC, FBXW7, and SMAD4 may be potential markers for detecting pancreatic ductal adenocarcinoma (PDAC) [112]. A ctDNA KRAS mutation for the diagnosis of PDAC was reported to have a sensitivity of 47% and a specificity of 87%, and when combined with CA19-9, it had a sensitivity of 98% and a specificity of 77% [113]. On the contrary, Cohen et al. reported that CA19-9 outperformed ctDNA for the detection of stages I and II PDAC [114]. The results of studies on ctDNA have been varied. In a study of 26 cancer patients utilizing next-generation sequencing (NGS) technology, KRAS, TP53, APC, FBXW7, and SMAD4 mutations were found in 90% of the matched tumor biopsies. The diagnostic accuracy was reported to be 97.7%, with an average sensitivity of 92.3% and a specificity of 100% across all five investigated genes [115]. Conversely, Pishavian et al. reported an overall concordance of only 25% between blood and tissue samples using NGS assays, and KRAS mutations were detected in only 29% of the blood samples compared to 87% in the tumor tissue biopsies [116]. Similarly, in another study evaluating the correspondence of KRAS mutations in PC tissue and ctDNA, researchers reported that KRAS mutations were detected in 70% of neoplastic tissue samples, but none were found in ctDNA samples [117].
Currently, the use of ctDNA as a diagnostic tool is limited due to the low amount of detectable ctDNA in the early stage of the disease [118]. However, ctDNA has shown a correlation with the tumor burden and holds promise as a tool for predicting the treatment response and for monitoring in advanced cases [119]. Chen et al. found a correlation between KRAS-mutant ctDNA and both the time to progression and the overall survival. The detection rates in patients with non-elevated CA19-9 were 93.7% and 86.4%, respectively. KRAS mutations were also able to correctly predict 80% of the patient response to treatment [120]. Patients with KRAS-mutant ctDNA were reported to have 6.1 months of disease-free survival in comparison to 16.1 months in patients that had no such mutation, with overall survival times of 13.3 and 27.6 months, respectively (p < 0.001) [121]. Similarly, a recent study using digital droplet PCR (ddPCR) reported that KRAS-mutated ctDNA was associated with a poorer prognosis of, 170 days versus 489 days; notably, the presence of a KRAS mutation in tissue DNA did not show a similar association with survival rates [122]. A specific subtype of KRAS mutation, p.G12V, was linked to a shorter survival time compared to p.G12D, p.G12R, or wild-type variants [122]. Serial plasma testing of KRAS-mutant ctDNA in advanced PDAC patients undergoing chemotherapy appears to provide more effective monitoring than CA 19-9 [123]. The longitudinal monitoring of ctDNA has been reported to predict a patient’s response to therapy and disease progression around 5 months earlier than standard radiological imaging and CA19-9 [124,125].
The application of ctDNA is currently restricted due to the inconsistent concordance between tissue biopsies and liquid biopsies, which range widely from 48% to 100% [121]. Additionally, the lack of standardized protocols, variations in the reliability of the ctDNA detection methods across studies, and limited validation studies further contribute to the limitations [108]. Moreover, given that mutations are not exclusive to PC and can be observed in other tumor entities, there are challenges in achieving high diagnostic sensitivity and specificity [79].

3.3. Circulating Tumor Cells (CTCs)

Intact cells released by tumors, known as circulating tumor cells, can be identified in the bloodstream [126]. After shedding, the circulating tumor cells can disseminate through blood vessels and invade local tissue stoma [127-129]. It has been reported that CTCs can be detected before metastasis [130]. CTCs were reported to be present in whole blood at a ratio of around 1 for every 107 leukocytes per mL, with a half-life estimated at around 1-2.4 hours [131]. The identification of CTCs includes the process of CD45 depletion to remove leukocytes; then, the enrichment of CTCs is performed via size-based filtration or through the use of epithelial cell adhesion molecules (EPCAMs). Actual CTC recognition involves examining the cell morphology and measuring the expression of particular gene markers or proteins via the immunofluorescence of molecules specific for CTCs [79,131]. Another CTC detection method utilizes genomic, transcriptomic and proteomic approaches; one of the most widely used is the FDA-approved Cell Search® [131]. Developing methods for detecting CTCs is challenging, as there are only a low number of captured CTCs [132]. Furthermore, PC has been reported to have a lower detection rate in comparison to other tumors [108].
Numerous studies have indicated that circulating tumor cells (CTCs) may exhibit a sufficient sensitivity for the detection of stage I and II PC. Kulemann et al. detected CTCs in early-stage IIA and IIB tumors in 8 out of 10 patients (80%) using immunofluorescence for an epithelial-to-mesenchymal transition (EMT) marker and an epithelial antigen cytokeratin (CK); in contrast, CTCs were absent in all 10 control patients, with a p -value less than 0.001 [133]. Similarly, Xu et al. were able to detect CTCs in 90% of PC patients using the negative enrichment (NE), immunofluorescence, and in situ hybridization (FISH) of chromosome 8 (NE-iFISH); when combined with CA19-9, the diagnostic rate was reported to reach 97.5%, with a rate of 75% for benign disease, and 73% for early-stage PC [134]. Furthermore, Rhim et al. reported capturing CTCs in 33% of patients with cystic lesions without a clinical diagnosis of cancer (Sendai criteria), 73% of patients with PDAC, and no detection in patients without cysts or cancer [135]. Although promising, the use of CTCs as an early biomarker is not yet suitable for clinical settings and still requires studies involving a higher number of samples.

4. Artificial Intelligence (AI)

The application of artificial intelligence (AI) can mitigate the subjectivity of doctors and address inconsistent diagnoses arising from variations in training, experience, and professional attributes [14]. Diagnosing PC demands the expertise of professionals to conduct intricate analyses involving vast amounts of data, encompassing imaging, pathological slices, and biomarkers. Artificial neural networks (ANNs), which are nonparametric machine learning models that emulate human brain processing, consist of processing elements called neurodes arranged in layers to simulate the hierarchical activation of neurons in the brain [136]. In one study, ANN models were reported to predict the 7-month survival of PDAC patients, with or without resection, and these models achieved 91% sensitivity and a 38% specificity [136]. Yang et al. demonstrated that, when applied to 913 serum specimens for the analysis of CA19-9, CA-125, and CEA, the ANN outperformed each serum tumor marker alone and a logistic regression model. The sample size of 913 was randomly divided into a training group (n=658) and a test group (n=225), revealing an AUC for the ANN of 0.905 (95% confidence interval [CI]: 0.868-0.942) compared to 0.812 (95% CI: 0.762-0.863) for the logistic regression model [137]. Another team employed a penalized algorithm to create a PC-diagnostic model with 29 miRNA markers in 63 PC patients and 63 controls, validated with 25 PC samples and 81 intrahepatic cholangiocarcinoma patients’ serum samples. The algorithm-based diagnostic model demonstrated a sensitivity of 96% and a specificity of 90%, surpassing CA19-9 with sensitivity and specificity levels that were 1.5 and 2 times higher, respectively [138].

5. Nanoparticles (NPs)

NPs, with sizes ranging from 1 to 100 nm, have emerged as a category of materials holding promise for applications in in-vivo imaging and biological diagnostics. As contrast agents, NPs are ideally characterized by an easy dispersibility; a stability unaffected by factors such as the polarity, ionic strength, pH, or temperature, programmed clearance mechanisms; and sensitivity and selectivity for the target (e.g., antigen, cell, tissue) [139]. Rosenberger et al. introduced a novel NP developed as an MRI contrast agent for PC. This NP was composed of recombinant human serum albumin (rHSA) incorporating iron oxide (maghemite, γ-Fe2O3) with a strong affinity for galectin-1. Galectin-1 was selected as the target receptor due to its overexpression in PC and its precursor lesions, but not in normal pancreatic tissue or pancreatitis [140]. Another study by Luo et al. reported the use of hyaluronic acid (HA)-mediated multifunctional Fe3O4 NPs to target PC cancer cells via CD44 on the cytoplasmic membrane, which has a high affinity for HA. HA-Fe3O4 NPs were shown to be efficient T2-weighted magnetic resonance imaging (MRI) contrast agents [141]. The application of NPs to enhance the response of antigen-antibody sensing processes, utilizing SiO(2) nanoparticle labeled secondary antibodies, was described in 2010 by Zhuo et al. The results indicated that the CA19-9 detection threshold was 100 times lower than that of the traditional ELISA method, potentially enabling the detection of early-stage PC changes in CA19-9 levels [142]. Another study utilized multiwalled carbon nanotubes (MWCNTs) paper for the detection of CA19-9, demonstrating the ability to detect a wide range of CA19-9 concentrations (0 U/mL to at least 1000 U/mL). This method involved adding CA19-9 antibodies to the surface of MWCNTs deposited on microporous filter paper, and the resistance of the biosensor element was linear to the concentration of CA19-9 [143].

6. Conclusions

With PC presenting with a poor prognosis, especially due to late-stage detection, the imperative for early diagnostic tools is evident. Establishing an accurate and targeted screening model for PC is crucial. Optimal biomarkers should efficiently distinguish between healthy individuals and patients, enable early detection, allow for ease of measurability, be cost-effective, and yield reproducible results.
Recent investigations into novel biomarkers have shown promise, but they require further validation with larger sample sizes and standardized measurement methods. The cost-effectiveness and practicality are crucial considerations for the widespread clinical application of these biomarkers. The authors emphasize the importance of focused research on realistic and applicable early detection methods and models for clinical use. A pan-diagnostic cancer tool in Korea that utilizes well-known biomarkers, has shown promise in predicting multiple cancers at a reasonable cost, underlining the potential for improved clinical diagnostic models. This tool uses several well-known biomarkers and has been reported to predict multiple cancers at a cost of USD 300, with a reported AUC of 0.993 for the detection of PC [82]. Enhancements in these models could aid in identifying high-risk individuals earlier, emphasizing the need to screening high-risk groups at an early stage.

Author Contributions

Conceptualization, M.B.B and I.R.J, Writing, original draft preparation, M.B.B, I.R.J, A.F.S; figure preparation M.B.B and I.R.J; review and editing M.B.B and A.F.S. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Acknowledgments

Not applicable.

Conflicts of Interest

The authors declare no conflict of interest.

References

  1. Siegel, R.L.; Miller, K.D.; Jemal, A. Cancer statistics, 2018. CA: a cancer journal for clinicians 2018, 68, 7–30. [Google Scholar] [CrossRef]
  2. Sung, H.; Ferlay, J.; Siegel, R.L.; Laversanne, M.; Soerjomataram, I.; Jemal, A.; Bray, F. Global Cancer Statistics 2020: GLOBOCAN Estimates of Incidence and Mortality Worldwide for 36 Cancers in 185 Countries. CA: a cancer journal for clinicians 2021, 71, 209–249. [Google Scholar] [CrossRef]
  3. Latenstein, A.E.J.; Geest, L.G.M.v.d.; Bonsing, B.A.; Koerkamp, B.G.; Mohammad, N.H.; Hingh, I.H.J.T.d.; Meijer, V.E.d.; Molenaar, I.Q.; Santvoort, H.C.v.; Tienhoven, G.v.; et al. Nationwide trends in incidence, treatment and survival of pancreatic ductal adenocarcinoma. European Journal of Cancer 2019, 125, 83–93. [Google Scholar] [CrossRef]
  4. Bray, F.; Ferlay, J.; Soerjomataram, I.; Siegel, R.L.; Torre, L.A.; Jemal, A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA: a cancer journal for clinicians 2018, 68, 394–424. [Google Scholar] [CrossRef] [PubMed]
  5. Ferlay, J.; Partensky, C.; Bray, F. More deaths from pancreatic cancer than breast cancer in the EU by 2017. Acta oncologica 2016, 55, 1158–1160. [Google Scholar] [CrossRef]
  6. Conroy, T.; Pfeiffer, P.; Vilgrain, V.; Lamarca, A.; Seufferlein, T.; O’Reilly, E.M.; Hackert, T.; Golan, T.; Prager, G.; Haustermans, K.; et al. Pancreatic cancer: ESMO Clinical Practice Guideline for diagnosis, treatment and follow-up. Annals os Oncology 2023, 34, 987–1002. [Google Scholar] [CrossRef]
  7. Rawla, P.; Sunkara, T.; Gaduputi, V. Epidemiology of Pancreatic Cancer: Global Trends, Etiology and Risk Factors. World journal of oncology 2019, 10, 10–27. [Google Scholar] [CrossRef] [PubMed]
  8. Sens, M.A.; Zhou, X.; Weiland, T.; Cooley, A.M. Unexpected neoplasia in autopsies: potential implications for tissue and organ safety. Archives of pathology & laboratory medicine 2009, 133, 1923–1931. [Google Scholar] [CrossRef]
  9. Gandolfi, L.; Torresan, F.; Solmi, L.; Puccetti, A. The role of ultrasound in biliary and pancreatic diseases. European journal of ultrasound: official journal of the European Federation of Societies for Ultrasound in Medicine and Biology 2003, 16, 141–159. [CrossRef]
  10. Francis, I.R. Pancreatic adenocarcinoma: diagnosis and staging using multidetector-row computed tomography (MDCT) and magnetic resonance imaging (MRI). Cancer imaging: the official publication of the International Cancer Imaging Society 2007, 7 Spec No A, S160-165. [CrossRef]
  11. Zins, M.; Matos, C.; Cassinotto, C. Pancreatic Adenocarcinoma Staging in the Era of Preoperative Chemotherapy and Radiation Therapy. Radiology 2018, 287, 374–390. [Google Scholar] [CrossRef]
  12. Bestari, M.B.; Ang, T.L.; Abdurachman, S.A. Endoscopic ultrasound in the diagnosis of occult pancreatic head cancer. Acta medica Indonesiana 2009, 41, 144–147. [Google Scholar]
  13. Kurihara, K.; Hanada, K.; Shimizu, A. Endoscopic Ultrasonography Diagnosis of Early Pancreatic Cancer. Diagnostics 2020, 10. [Google Scholar] [CrossRef]
  14. Wu, H.; Ou, S.; Zhang, H.; Huang, R.; Yu, S.; Zhao, M.; Tai, S. Advances in biomarkers and techniques for pancreatic cancer diagnosis. Cancer cell international 2022, 22, 220. [Google Scholar] [CrossRef]
  15. Shin, D.W.; Kim, J. The American Joint Committee on Cancer 8th edition staging system for the pancreatic ductal adenocarcinoma: is it better than the 7th edition? Hepatobiliary surgery and nutrition 2020, 9, 98–100. [Google Scholar] [CrossRef] [PubMed]
  16. Agarwal, B.; Correa, A.M.; Ho, L. Survival in pancreatic carcinoma based on tumor size. Pancreas 2008, 36, e15–20. [Google Scholar] [CrossRef] [PubMed]
  17. PC: Statistics 03/2023: American Society of Clinical Oncology; 2023 [Available from: https://www.cancer.net/cancer-types/pancreatic-cancer/statistics.
  18. Neoptolemos, J.P.; Stocken, D.D.; Bassi, C.; Ghaneh, P.; Cunningham, D.; Goldstein, D.; Padbury, R.; Moore, M.J.; Gallinger, S.; Mariette, C.; et al. Adjuvant chemotherapy with fluorouracil plus folinic acid vs gemcitabine following pancreatic cancer resection: a randomized controlled trial. Jama 2010, 304, 1073–1081. [Google Scholar] [CrossRef] [PubMed]
  19. Ryan, D.P.; Hong, T.S.; Bardeesy, N. Pancreatic adenocarcinoma. The New England journal of medicine 2014, 371, 1039–1049. [Google Scholar] [CrossRef] [PubMed]
  20. Kleeff, J.; Korc, M.; Apte, M.; La Vecchia, C.; Johnson, C.D.; Biankin, A.V.; Neale, R.E.; Tempero, M.; Tuveson, D.A.; Hruban, R.H.; et al. Pancreatic cancer. Nature reviews. Disease primers 2016, 2, 16022. [Google Scholar] [CrossRef] [PubMed]
  21. Kenner, B.J.; Chari, S.T.; Cleeter, D.F.; Go, V.L. Early detection of sporadic pancreatic cancer: strategic map for innovation--a white paper. Pancreas 2015, 44, 686–692. [Google Scholar] [CrossRef] [PubMed]
  22. Henrikson, N.B.; Aiello Bowles, E.J.; Blasi, P.R.; Morrison, C.C.; Nguyen, M.; Pillarisetty, V.G.; Lin, J.S. Screening for Pancreatic Cancer: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force. Jama 2019, 322, 445–454. [Google Scholar] [CrossRef]
  23. Canto, M.I.; Harinck, F.; Hruban, R.H.; Offerhaus, G.J.; Poley, J.W.; Kamel, I.; Nio, Y.; Schulick, R.S.; Bassi, C.; Kluijt, I.; et al. International Cancer of the Pancreas Screening (CAPS) Consortium summit on the management of patients with increased risk for familial pancreatic cancer. Gut 2013, 62, 339–347. [Google Scholar] [CrossRef]
  24. Force, U.S.P.S.T.; Owens, D.K.; Davidson, K.W.; Krist, A.H.; Barry, M.J.; Cabana, M.; Caughey, A.B.; Curry, S.J.; Doubeni, C.A.; Epling, J.W., Jr.; et al. Screening for Pancreatic Cancer: US Preventive Services Task Force Reaffirmation Recommendation Statement. Jama 2019, 322, 438–444. [Google Scholar] [CrossRef]
  25. Canto, M.I.; Hruban, R.H.; Fishman, E.K.; Kamel, I.R.; Schulick, R.; Zhang, Z.; Topazian, M.; Takahashi, N.; Fletcher, J.; Petersen, G.; et al. Frequent detection of pancreatic lesions in asymptomatic high-risk individuals. Gastroenterology 2012, 142, 796–804. [Google Scholar] [CrossRef] [PubMed]
  26. Lami, G.; Biagini, M.R.; Galli, A. Endoscopic ultrasonography for surveillance of individuals at high risk for pancreatic cancer. World journal of gastrointestinal endoscopy 2014, 6, 272–285. [Google Scholar] [CrossRef] [PubMed]
  27. Goggins, M.; Overbeek, K.A.; Brand, R.; Syngal, S.; Del Chiaro, M.; Bartsch, D.K.; Bassi, C.; Carrato, A.; Farrell, J.; Fishman, E.K.; et al. Management of patients with increased risk for familial pancreatic cancer: updated recommendations from the International Cancer of the Pancreas Screening (CAPS) Consortium. Gut 2020, 69, 7–17. [Google Scholar] [CrossRef] [PubMed]
  28. Tempero, M.A.; Malafa, M.P.; Al-Hawary, M.; Behrman, S.W.; Benson, A.B.; Cardin, D.B.; Chiorean, E.G.; Chung, V.; Czito, B.; Del Chiaro, M.; et al. Pancreatic Adenocarcinoma, Version 2.2021, NCCN Clinical Practice Guidelines in Oncology. Journal of the National Comprehensive Cancer Network: JNCCN 2021, 19, 439–457. [Google Scholar] [CrossRef] [PubMed]
  29. Yang, J.; Xu, R.; Wang, C.; Qiu, J.; Ren, B.; You, L. Early screening and diagnosis strategies of pancreatic cancer: a comprehensive review. Cancer communications 2021, 41, 1257–1274. [Google Scholar] [CrossRef]
  30. Canto, M.I.; Goggins, M.; Hruban, R.H.; Petersen, G.M.; Giardiello, F.M.; Yeo, C.; Fishman, E.K.; Brune, K.; Axilbund, J.; Griffin, C.; et al. Screening for early pancreatic neoplasia in high-risk individuals: a prospective controlled study. Clinical gastroenterology and hepatology: the official clinical practice journal of the American Gastroenterological Association 2006, 4, 766–781. [Google Scholar] [CrossRef] [PubMed]
  31. Bosetti, C.; Lucenteforte, E.; Silverman, D.T.; Petersen, G.; Bracci, P.M.; Ji, B.T.; Negri, E.; Li, D.; Risch, H.A.; Olson, S.H.; et al. Cigarette smoking and pancreatic cancer: an analysis from the International Pancreatic Cancer Case-Control Consortium (Panc4). Annals of oncology: official journal of the European Society for Medical Oncology 2012, 23, 1880–1888. [Google Scholar] [CrossRef]
  32. Pang, Y.; Holmes, M.V.; Guo, Y.; Yang, L.; Bian, Z.; Chen, Y.; Iona, A.; Millwood, I.Y.; Bragg, F.; Chen, J.; et al. Smoking, alcohol, and diet in relation to risk of pancreatic cancer in China: a prospective study of 0.5 million people. Cancer medicine 2018, 7, 229–239. [Google Scholar] [CrossRef]
  33. Naudin, S.; Li, K.; Jaouen, T.; Assi, N.; Kyro, C.; Tjonneland, A.; Overvad, K.; Boutron-Ruault, M.C.; Rebours, V.; Vedie, A.L.; et al. Lifetime and baseline alcohol intakes and risk of pancreatic cancer in the European Prospective Investigation into Cancer and Nutrition study. International journal of cancer 2018, 143, 801–812. [Google Scholar] [CrossRef]
  34. Green, R.C., Jr.; Baggenstoss, A.H.; Sprague, R.G. Diabetes mellitus in association with primary carcinoma of the pancreas. Diabetes 1958, 7, 308–311. [Google Scholar] [CrossRef]
  35. Sah, R.P.; Nagpal, S.J.; Mukhopadhyay, D.; Chari, S.T. New insights into pancreatic cancer-induced paraneoplastic diabetes. Nature reviews. Gastroenterology & hepatology 2013, 10, 423–433. [Google Scholar] [CrossRef]
  36. Noy, A.; Bilezikian, J.P. Clinical review 63: Diabetes and pancreatic cancer: clues to the early diagnosis of pancreatic malignancy. The Journal of clinical endocrinology and metabolism 1994, 79, 1223–1231. [Google Scholar] [CrossRef] [PubMed]
  37. Permert, J.; Ihse, I.; Jorfeldt, L.; von Schenck, H.; Arnqvist, H.J.; Larsson, J. Pancreatic cancer is associated with impaired glucose metabolism. The European journal of surgery = Acta chirurgica 1993, 159, 101–107. [Google Scholar]
  38. Cersosimo, E.; Pisters, P.W.; Pesola, G.; McDermott, K.; Bajorunas, D.; Brennan, M.F. Insulin secretion and action in patients with pancreatic cancer. Cancer 1991, 67, 486–493. [Google Scholar] [CrossRef] [PubMed]
  39. Pannala, R.; Leirness, J.B.; Bamlet, W.R.; Basu, A.; Petersen, G.M.; Chari, S.T. Prevalence and clinical profile of pancreatic cancer-associated diabetes mellitus. Gastroenterology 2008, 134, 981–987. [Google Scholar] [CrossRef]
  40. Singhi, A.D.; Koay, E.J.; Chari, S.T.; Maitra, A. Early Detection of Pancreatic Cancer: Opportunities and Challenges. Gastroenterology 2019, 156, 2024–2040. [Google Scholar] [CrossRef]
  41. Sharma, A.; Smyrk, T.C.; Levy, M.J.; Topazian, M.A.; Chari, S.T. Fasting Blood Glucose Levels Provide Estimate of Duration and Progression of Pancreatic Cancer Before Diagnosis. Gastroenterology 2018, 155, 490–500. [Google Scholar] [CrossRef]
  42. Pelaez-Luna, M.; Takahashi, N.; Fletcher, J.G.; Chari, S.T. Resectability of presymptomatic pancreatic cancer and its relationship to onset of diabetes: a retrospective review of CT scans and fasting glucose values prior to diagnosis. The American journal of gastroenterology 2007, 102, 2157–2163. [Google Scholar] [CrossRef]
  43. Sharma, A.; Kandlakunta, H.; Nagpal, S.J.S.; Feng, Z.; Hoos, W.; Petersen, G.M.; Chari, S.T. Model to Determine Risk of Pancreatic Cancer in Patients With New-Onset Diabetes. Gastroenterology 2018, 155, 730–739. [Google Scholar] [CrossRef]
  44. Lu, X.H.; Wang, L.; Li, H.; Qian, J.M.; Deng, R.X.; Zhou, L. Establishment of risk model for pancreatic cancer in Chinese Han population. World journal of gastroenterology 2006, 12, 2229–2234. [Google Scholar] [CrossRef] [PubMed]
  45. Tarasiuk, A.; Mackiewicz, T.; Malecka-Panas, E.; Fichna, J. Biomarkers for early detection of pancreatic cancer - miRNAs as a potential diagnostic and therapeutic tool? Cancer biology & therapy 2021, 22, 347–356. [Google Scholar] [CrossRef]
  46. Winter, K.; Talar-Wojnarowska, R.; Dabrowski, A.; Degowska, M.; Durlik, M.; Gasiorowska, A.; Gluszek, S.; Jurkowska, G.; Kaczka, A.; Lampe, P.; et al. Diagnostic and therapeutic recommendations in pancreatic ductal adenocarcinoma. Recommendations of the Working Group of the Polish Pancreatic Club. Przeglad gastroenterologiczny 2019, 14, 1–18. [Google Scholar] [CrossRef]
  47. Poruk, K.E.; Gay, D.Z.; Brown, K.; Mulvihill, J.D.; Boucher, K.M.; Scaife, C.L.; Firpo, M.A.; Mulvihill, S.J. The clinical utility of CA 19-9 in pancreatic adenocarcinoma: diagnostic and prognostic updates. Current molecular medicine 2013, 13, 340–351. [Google Scholar] [CrossRef] [PubMed]
  48. Scara, S.; Bottoni, P.; Scatena, R. CA 19-9: Biochemical and Clinical Aspects. Advances in experimental medicine and biology 2015, 867, 247–260. [Google Scholar] [CrossRef] [PubMed]
  49. Koprowski, H.; Herlyn, M.; Steplewski, Z.; Sears, H.F. Specific antigen in serum of patients with colon carcinoma. Science 1981, 212, 53–55. [Google Scholar] [CrossRef] [PubMed]
  50. Guo, M.; Luo, G.; Lu, R.; Shi, W.; Cheng, H.; Lu, Y.; Jin, K.; Yang, C.; Wang, Z.; Long, J.; et al. Distribution of Lewis and Secretor polymorphisms and corresponding CA19-9 antigen expression in a Chinese population. FEBS open bio 2017, 7, 1660–1671. [Google Scholar] [CrossRef]
  51. Liu, C.; Deng, S.; Jin, K.; Gong, Y.; Cheng, H.; Fan, Z.; Qian, Y.; Huang, Q.; Ni, Q.; Luo, G.; et al. Lewis antigen-negative pancreatic cancer: An aggressive subgroup. International journal of oncology 2020, 56, 900–908. [Google Scholar] [CrossRef]
  52. Nazli, O.; Bozdag, A.D.; Tansug, T.; Kir, R.; Kaymak, E. The diagnostic importance of CEA and CA 19-9 for the early diagnosis of pancreatic carcinoma. Hepato-gastroenterology 2000, 47, 1750–1752. [Google Scholar]
  53. Meng, Q.; Shi, S.; Liang, C.; Liang, D.; Xu, W.; Ji, S.; Zhang, B.; Ni, Q.; Xu, J.; Yu, X. Diagnostic and prognostic value of carcinoembryonic antigen in pancreatic cancer: a systematic review and meta-analysis. OncoTargets and therapy 2017, 10, 4591–4598. [Google Scholar] [CrossRef]
  54. Asad-Ur-Rahman, F.; Saif, M.W. Elevated Level of Serum Carcinoembryonic Antigen (CEA) and Search for a Malignancy: A Case Report. Cureus 2016, 8, e648. [Google Scholar] [CrossRef] [PubMed]
  55. Nozawa, H.; Yokota, Y.; Emoto, S.; Yokoyama, Y.; Sasaki, K.; Murono, K.; Abe, S.; Sonoda, H.; Shinagawa, T.; Ishihara, S. Unexplained increases in serum carcinoembryonic antigen levels in colorectal cancer patients during the postoperative follow-up period: an analysis of its incidence and longitudinal pattern. Annals of medicine 2023, 55, 2246997. [Google Scholar] [CrossRef] [PubMed]
  56. Ermiah, E.; Eddfair, M.; Abdulrahman, O.; Elfagieh, M.; Jebriel, A.; Al-Sharif, M.; Assidi, M.; Buhmeida, A. Prognostic value of serum CEA and CA19-9 levels in pancreatic ductal adenocarcinoma. Molecular and clinical oncology 2022, 17, 126. [Google Scholar] [CrossRef]
  57. Esen, E.; Aslan, M.; Morkavuk, S.B.; Azili, C.; Ersoz, S.; Bahcecioglu, I.B.; Unal, A.E. Can combined use of tumor markers in pancreatic cancer be a solution to short- and long-term consequences?: A retrospective study. Medicine 2023, 102, e33325. [Google Scholar] [CrossRef]
  58. Xie, Z.B.; Zhang, Y.F.; Jin, C.; Mao, Y.S.; Fu, D.L. LRG-1 promotes pancreatic cancer growth and metastasis via modulation of the EGFR/p38 signaling. Journal of experimental & clinical cancer research: CR 2019, 38, 75. [Google Scholar] [CrossRef]
  59. O'Donnell, L.C.; Druhan, L.J.; Avalos, B.R. Molecular characterization and expression analysis of leucine-rich alpha2-glycoprotein, a novel marker of granulocytic differentiation. Journal of leukocyte biology 2002, 72, 478–485. [Google Scholar] [CrossRef]
  60. Wang, X.; Abraham, S.; McKenzie, J.A.G.; Jeffs, N.; Swire, M.; Tripathi, V.B.; Luhmann, U.F.O.; Lange, C.A.K.; Zhai, Z.; Arthur, H.M.; et al. LRG1 promotes angiogenesis by modulating endothelial TGF-beta signalling. Nature 2013, 499, 306–311. [Google Scholar] [CrossRef]
  61. Liou, G.Y.; Byrd, C.J. Diagnostic Bioliquid Markers for Pancreatic Cancer: What We Have vs. What We Need. Cancers 2023, 15. [Google Scholar] [CrossRef]
  62. Furukawa, K.; Kawamoto, K.; Eguchi, H.; Tanemura, M.; Tanida, T.; Tomimaru, Y.; Akita, H.; Hama, N.; Wada, H.; Kobayashi, S.; et al. Clinicopathological Significance of Leucine-Rich alpha2-Glycoprotein-1 in Sera of Patients With Pancreatic Cancer. Pancreas 2015, 44, 93–98. [Google Scholar] [CrossRef]
  63. Joergensen, M.T.; Brunner, N.; De Muckadell, O.B. Comparison of circulating MMP-9, TIMP-1 and CA19-9 in the detection of pancreatic cancer. Anticancer research 2010, 30, 587–592. [Google Scholar]
  64. Slapak, E.J.; Duitman, J.; Tekin, C.; Bijlsma, M.F.; Spek, C.A. Matrix Metalloproteases in Pancreatic Ductal Adenocarcinoma: Key Drivers of Disease Progression? Biology 2020, 9. [Google Scholar] [CrossRef]
  65. Hayakawa, T.; Yamashita, K.; Tanzawa, K.; Uchijima, E.; Iwata, K. Growth-promoting activity of tissue inhibitor of metalloproteinases-1 (TIMP-1) for a wide range of cells. A possible new growth factor in serum. FEBS letters 1992, 298, 29–32. [Google Scholar] [CrossRef] [PubMed]
  66. Chen, J.; Chen, L.J.; Xia, Y.L.; Zhou, H.C.; Yang, R.B.; Wu, W.; Lu, Y.; Hu, L.W.; Zhao, Y. Identification and verification of transthyretin as a potential biomarker for pancreatic ductal adenocarcinoma. Journal of cancer research and clinical oncology 2013, 139, 1117–1127. [Google Scholar] [CrossRef] [PubMed]
  67. mohamed, A.; Saad, Y.; Saleh, D.; Elawady, R.; Eletreby, R.; Kharalla, A.S.; Badr, E. Can Serum ICAM 1 distinguish pancreatic cancer from chronic pancreatitis? Asian Pacific journal of cancer prevention: APJCP 2016, 17, 4671–4675. [Google Scholar] [CrossRef]
  68. Shi, W.; Qiu, W.; Wang, W.; Zhou, X.; Zhong, X.; Tian, G.; Deng, A. Osteoprotegerin is up-regulated in pancreatic cancers and correlates with cancer-associated new-onset diabetes. Bioscience trends 2014, 8, 322–326. [Google Scholar] [CrossRef]
  69. Wang, Y.; Liu, Y.; Huang, Z.; Chen, X.; Zhang, B. The roles of osteoprotegerin in cancer, far beyond a bone player. Cell death discovery 2022, 8, 252. [Google Scholar] [CrossRef]
  70. O'Neill, R.S.; Stoita, A. Biomarkers in the diagnosis of pancreatic cancer: Are we closer to finding the golden ticket? World journal of gastroenterology 2021, 27, 4045–4087. [Google Scholar] [CrossRef] [PubMed]
  71. Balkwill, F.R. The chemokine system and cancer. The Journal of pathology 2012, 226, 148–157. [Google Scholar] [CrossRef]
  72. Litman-Zawadzka, A.; Lukaszewicz-Zajac, M.; Mroczko, B. Novel potential biomarkers for pancreatic cancer - A systematic review. Advances in medical sciences 2019, 64, 252–257. [Google Scholar] [CrossRef]
  73. Lazennec, G.; Richmond, A. Chemokines and chemokine receptors: new insights into cancer-related inflammation. Trends in molecular medicine 2010, 16, 133–144. [Google Scholar] [CrossRef]
  74. Groblewska, M.; Litman-Zawadzka, A.; Mroczko, B. The Role of Selected Chemokines and Their Receptors in the Development of Gliomas. International journal of molecular sciences 2020, 21. [Google Scholar] [CrossRef]
  75. Lian, S.; Zhai, X.; Wang, X.; Zhu, H.; Zhang, S.; Wang, W.; Wang, Z.; Huang, J. Elevated expression of growth-regulated oncogene-alpha in tumor and stromal cells predicts unfavorable prognosis in pancreatic cancer. Medicine 2016, 95, e4328. [Google Scholar] [CrossRef]
  76. Zhang, J.; Liu, C.; Mo, X.; Shi, H.; Li, S. Mechanisms by which CXCR4/CXCL12 cause metastatic behavior in pancreatic cancer. Oncology letters 2018, 15, 1771–1776. [Google Scholar] [CrossRef]
  77. Kimsey, T.F.; Campbell, A.S.; Albo, D.; Wilson, M.; Wang, T.N. Co-localization of macrophage inflammatory protein-3alpha (Mip-3alpha) and its receptor, CCR6, promotes pancreatic cancer cell invasion. Cancer journal 2004, 10, 374–380. [Google Scholar] [CrossRef]
  78. Gerlinger, M.; Rowan, A.J.; Horswell, S.; Math, M.; Larkin, J.; Endesfelder, D.; Gronroos, E.; Martinez, P.; Matthews, N.; Stewart, A.; et al. Intratumor heterogeneity and branched evolution revealed by multiregion sequencing. The New England journal of medicine 2012, 366, 883–892. [Google Scholar] [CrossRef]
  79. Al-Shaheri, F.N.; Alhamdani, M.S.S.; Bauer, A.S.; Giese, N.; Buchler, M.W.; Hackert, T.; Hoheisel, J.D. Blood biomarkers for differential diagnosis and early detection of pancreatic cancer. Cancer treatment reviews 2021, 96, 102193. [Google Scholar] [CrossRef]
  80. Park, J.; Choi, Y.; Namkung, J.; Yi, S.G.; Kim, H.; Yu, J.; Kim, Y.; Kwon, M.S.; Kwon, W.; Oh, D.Y.; et al. Diagnostic performance enhancement of pancreatic cancer using proteomic multimarker panel. Oncotarget 2017, 8, 93117–93130. [Google Scholar] [CrossRef]
  81. Brand, R.E.; Nolen, B.M.; Zeh, H.J.; Allen, P.J.; Eloubeidi, M.A.; Goldberg, M.; Elton, E.; Arnoletti, J.P.; Christein, J.D.; Vickers, S.M.; et al. Serum biomarker panels for the detection of pancreatic cancer. Clinical cancer research: an official journal of the American Association for Cancer Research 2011, 17, 805–816. [Google Scholar] [CrossRef] [PubMed]
  82. Kim, H.; Kang, K.N.; Shin, Y.S.; Byun, Y.; Han, Y.; Kwon, W.; Kim, C.W.; Jang, J.Y. Biomarker Panel for the Diagnosis of Pancreatic Ductal Adenocarcinoma. Cancers 2020, 12. [Google Scholar] [CrossRef] [PubMed]
  83. Mellby, L.D.; Nyberg, A.P.; Johansen, J.S.; Wingren, C.; Nordestgaard, B.G.; Bojesen, S.E.; Mitchell, B.L.; Sheppard, B.C.; Sears, R.C.; Borrebaeck, C.A.K. Serum Biomarker Signature-Based Liquid Biopsy for Diagnosis of Early-Stage Pancreatic Cancer. Journal of clinical oncology: official journal of the American Society of Clinical Oncology 2018, 36, 2887–2894. [Google Scholar] [CrossRef] [PubMed]
  84. Krol, J.; Loedige, I.; Filipowicz, W. The widespread regulation of microRNA biogenesis, function and decay. Nature reviews. Genetics 2010, 11, 597–610. [Google Scholar] [CrossRef] [PubMed]
  85. Lee, R.C.; Feinbaum, R.L.; Ambros, V. The C. elegans heterochronic gene lin-4 encodes small RNAs with antisense complementarity to lin-14. Cell 1993, 75, 843–854. [Google Scholar] [CrossRef] [PubMed]
  86. Gong, R.; Jiang, Y. Non-coding RNAs in Pancreatic Ductal Adenocarcinoma. Frontiers in oncology 2020, 10, 309. [Google Scholar] [CrossRef]
  87. An, X.; Sarmiento, C.; Tan, T.; Zhu, H. Regulation of multidrug resistance by microRNAs in anti-cancer therapy. Acta pharmaceutica Sinica. B 2017, 7, 38–51. [Google Scholar] [CrossRef]
  88. Liu, R.; Chen, X.; Du, Y.; Yao, W.; Shen, L.; Wang, C.; Hu, Z.; Zhuang, R.; Ning, G.; Zhang, C.; et al. Serum microRNA expression profile as a biomarker in the diagnosis and prognosis of pancreatic cancer. Clinical chemistry 2012, 58, 610–618. [Google Scholar] [CrossRef]
  89. Herreros-Villanueva, M.; Bujanda, L. Non-invasive biomarkers in pancreatic cancer diagnosis: what we need versus what we have. Annals of translational medicine 2016, 4, 134. [Google Scholar] [CrossRef]
  90. Zhou, X.; Lu, Z.; Wang, T.; Huang, Z.; Zhu, W.; Miao, Y. Plasma miRNAs in diagnosis and prognosis of pancreatic cancer: A miRNA expression analysis. Gene 2018, 673, 181–193. [Google Scholar] [CrossRef] [PubMed]
  91. Zhang, J.; Bai, R.; Li, M.; Ye, H.; Wu, C.; Wang, C.; Li, S.; Tan, L.; Mai, D.; Li, G.; et al. Excessive miR-25-3p maturation via N(6)-methyladenosine stimulated by cigarette smoke promotes pancreatic cancer progression. Nature communications 2019, 10, 1858. [Google Scholar] [CrossRef]
  92. Li, B.S.; Zuo, Q.F.; Zhao, Y.L.; Xiao, B.; Zhuang, Y.; Mao, X.H.; Wu, C.; Yang, S.M.; Zeng, H.; Zou, Q.M.; et al. MicroRNA-25 promotes gastric cancer migration, invasion and proliferation by directly targeting transducer of ERBB2, 1 and correlates with poor survival. Oncogene 2015, 34, 2556–2565. [Google Scholar] [CrossRef]
  93. Wu, T.; Chen, W.; Kong, D.; Li, X.; Lu, H.; Liu, S.; Wang, J.; Du, L.; Kong, Q.; Huang, X.; et al. miR-25 targets the modulator of apoptosis 1 gene in lung cancer. Carcinogenesis 2015, 36, 925–935. [Google Scholar] [CrossRef]
  94. Razumilava, N.; Bronk, S.F.; Smoot, R.L.; Fingas, C.D.; Werneburg, N.W.; Roberts, L.R.; Mott, J.L. miR-25 targets TNF-related apoptosis inducing ligand (TRAIL) death receptor-4 and promotes apoptosis resistance in cholangiocarcinoma. Hepatology 2012, 55, 465–475. [Google Scholar] [CrossRef] [PubMed]
  95. Esposito, F.; Tornincasa, M.; Pallante, P.; Federico, A.; Borbone, E.; Pierantoni, G.M.; Fusco, A. Down-regulation of the miR-25 and miR-30d contributes to the development of anaplastic thyroid carcinoma targeting the polycomb protein EZH2. The Journal of clinical endocrinology and metabolism 2012, 97, E710–718. [Google Scholar] [CrossRef] [PubMed]
  96. Li, Q.; Zou, C.; Zou, C.; Han, Z.; Xiao, H.; Wei, H.; Wang, W.; Zhang, L.; Zhang, X.; Tang, Q.; et al. MicroRNA-25 functions as a potential tumor suppressor in colon cancer by targeting Smad7. Cancer letters 2013, 335, 168–174. [Google Scholar] [CrossRef] [PubMed]
  97. Yu, Y.; Tong, Y.; Zhong, A.; Wang, Y.; Lu, R.; Guo, L. Identification of Serum microRNA-25 as a novel biomarker for pancreatic cancer. Medicine 2020, 99, e23863. [Google Scholar] [CrossRef] [PubMed]
  98. Schultz, N.A.; Dehlendorff, C.; Jensen, B.V.; Bjerregaard, J.K.; Nielsen, K.R.; Bojesen, S.E.; Calatayud, D.; Nielsen, S.E.; Yilmaz, M.; Hollander, N.H.; et al. MicroRNA biomarkers in whole blood for detection of pancreatic cancer. Jama 2014, 311, 392–404. [Google Scholar] [CrossRef] [PubMed]
  99. Johansen, J.S.; Calatayud, D.; Albieri, V.; Schultz, N.A.; Dehlendorff, C.; Werner, J.; Jensen, B.V.; Pfeiffer, P.; Bojesen, S.E.; Giese, N.; et al. The potential diagnostic value of serum microRNA signature in patients with pancreatic cancer. International journal of cancer 2016, 139, 2312–2324. [Google Scholar] [CrossRef] [PubMed]
  100. Hernandez, Y.G.; Lucas, A.L. MicroRNA in pancreatic ductal adenocarcinoma and its precursor lesions. World journal of gastrointestinal oncology 2016, 8, 18–29. [Google Scholar] [CrossRef] [PubMed]
  101. Debernardi, S.; Massat, N.J.; Radon, T.P.; Sangaralingam, A.; Banissi, A.; Ennis, D.P.; Dowe, T.; Chelala, C.; Pereira, S.P.; Kocher, H.M.; et al. Noninvasive urinary miRNA biomarkers for early detection of pancreatic adenocarcinoma. American journal of cancer research 2015, 5, 3455–3466. [Google Scholar]
  102. Machida, T.; Tomofuji, T.; Maruyama, T.; Yoneda, T.; Ekuni, D.; Azuma, T.; Miyai, H.; Mizuno, H.; Kato, H.; Tsutsumi, K.; et al. miR-1246 and miR-4644 in salivary exosome as potential biomarkers for pancreatobiliary tract cancer. Oncology reports 2016, 36, 2375–2381. [Google Scholar] [CrossRef]
  103. Yang, J.Y.; Sun, Y.W.; Liu, D.J.; Zhang, J.F.; Li, J.; Hua, R. MicroRNAs in stool samples as potential screening biomarkers for pancreatic ductal adenocarcinoma cancer. American journal of cancer research 2014, 4, 663–673. [Google Scholar]
  104. Stroun, M.; Anker, P.; Maurice, P.; Lyautey, J.; Lederrey, C.; Beljanski, M. Neoplastic characteristics of the DNA found in the plasma of cancer patients. Oncology 1989, 46, 318–322. [Google Scholar] [CrossRef]
  105. Jahr, S.; Hentze, H.; Englisch, S.; Hardt, D.; Fackelmayer, F.O.; Hesch, R.D.; Knippers, R. DNA fragments in the blood plasma of cancer patients: quantitations and evidence for their origin from apoptotic and necrotic cells. Cancer research 2001, 61, 1659–1665. [Google Scholar]
  106. Heitzer, E.; Ulz, P.; Geigl, J.B. Circulating tumor DNA as a liquid biopsy for cancer. Clinical chemistry 2015, 61, 112–123. [Google Scholar] [CrossRef]
  107. Forshew, T.; Murtaza, M.; Parkinson, C.; Gale, D.; Tsui, D.W.; Kaper, F.; Dawson, S.J.; Piskorz, A.M.; Jimenez-Linan, M.; Bentley, D.; et al. Noninvasive identification and monitoring of cancer mutations by targeted deep sequencing of plasma DNA. Science translational medicine 2012, 4, 136ra168. [Google Scholar] [CrossRef] [PubMed]
  108. Rofi, E.; Vivaldi, C.; Del Re, M.; Arrigoni, E.; Crucitta, S.; Funel, N.; Fogli, S.; Vasile, E.; Musettini, G.; Fornaro, L.; et al. The emerging role of liquid biopsy in diagnosis, prognosis and treatment monitoring of pancreatic cancer. Pharmacogenomics 2019, 20, 49–68. [Google Scholar] [CrossRef] [PubMed]
  109. Misale, S.; Yaeger, R.; Hobor, S.; Scala, E.; Janakiraman, M.; Liska, D.; Valtorta, E.; Schiavo, R.; Buscarino, M.; Siravegna, G.; et al. Emergence of KRAS mutations and acquired resistance to anti-EGFR therapy in colorectal cancer. Nature 2012, 486, 532–536. [Google Scholar] [CrossRef] [PubMed]
  110. Shoda, K.; Ichikawa, D.; Fujita, Y.; Masuda, K.; Hiramoto, H.; Hamada, J.; Arita, T.; Konishi, H.; Komatsu, S.; Shiozaki, A.; et al. Monitoring the HER2 copy number status in circulating tumor DNA by droplet digital PCR in patients with gastric cancer. Gastric cancer: official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association 2017, 20, 126–135. [Google Scholar] [CrossRef] [PubMed]
  111. Shapiro, B.; Chakrabarty, M.; Cohn, E.M.; Leon, S.A. Determination of circulating DNA levels in patients with benign or malignant gastrointestinal disease. Cancer 1983, 51, 2116–2120. [Google Scholar] [CrossRef] [PubMed]
  112. Wan, J.C.M.; Massie, C.; Garcia-Corbacho, J.; Mouliere, F.; Brenton, J.D.; Caldas, C.; Pacey, S.; Baird, R.; Rosenfeld, N. Liquid biopsies come of age: towards implementation of circulating tumour DNA. Nature reviews. Cancer 2017, 17, 223–238. [Google Scholar] [CrossRef] [PubMed]
  113. Maire, F.; Micard, S.; Hammel, P.; Voitot, H.; Levy, P.; Cugnenc, P.H.; Ruszniewski, P.; Puig, P.L. Differential diagnosis between chronic pancreatitis and pancreatic cancer: value of the detection of KRAS2 mutations in circulating DNA. British journal of cancer 2002, 87, 551–554. [Google Scholar] [CrossRef] [PubMed]
  114. Cohen, J.D.; Javed, A.A.; Thoburn, C.; Wong, F.; Tie, J.; Gibbs, P.; Schmidt, C.M.; Yip-Schneider, M.T.; Allen, P.J.; Schattner, M.; et al. Combined circulating tumor DNA and protein biomarker-based liquid biopsy for the earlier detection of pancreatic cancers. Proceedings of the National Academy of Sciences of the United States of America 2017, 114, 10202–10207. [Google Scholar] [CrossRef]
  115. Zill, O.A.; Greene, C.; Sebisanovic, D.; Siew, L.M.; Leng, J.; Vu, M.; Hendifar, A.E.; Wang, Z.; Atreya, C.E.; Kelley, R.K.; et al. Cell-Free DNA Next-Generation Sequencing in Pancreatobiliary Carcinomas. Cancer discovery 2015, 5, 1040–1048. [Google Scholar] [CrossRef]
  116. Pishvaian, M.J.; Joseph Bender, R.; Matrisian, L.M.; Rahib, L.; Hendifar, A.; Hoos, W.A.; Mikhail, S.; Chung, V.; Picozzi, V.; Heartwell, C.; et al. A pilot study evaluating concordance between blood-based and patient-matched tumor molecular testing within pancreatic cancer patients participating in the Know Your Tumor (KYT) initiative. Oncotarget 2017, 8, 83446–83456. [Google Scholar] [CrossRef] [PubMed]
  117. Marchese, R.; Muleti, A.; Pasqualetti, P.; Bucci, B.; Stigliano, A.; Brunetti, E.; De Angelis, M.; Mazzoni, G.; Tocchi, A.; Brozzetti, S. Low correspondence between K-ras mutations in pancreatic cancer tissue and detection of K-ras mutations in circulating DNA. Pancreas 2006, 32, 171–177. [Google Scholar] [CrossRef] [PubMed]
  118. Diaz, L.A., Jr.; Bardelli, A. Liquid biopsies: genotyping circulating tumor DNA. Journal of clinical oncology: official journal of the American Society of Clinical Oncology 2014, 32, 579–586. [Google Scholar] [CrossRef] [PubMed]
  119. Dhayat, S.A.; Yang, Z. Impact of circulating tumor DNA in hepatocellular and pancreatic carcinomas. Journal of cancer research and clinical oncology 2020, 146, 1625–1645. [Google Scholar] [CrossRef] [PubMed]
  120. Chen, I.; Raymond, V.M.; Geis, J.A.; Collisson, E.A.; Jensen, B.V.; Hermann, K.L.; Erlander, M.G.; Tempero, M.; Johansen, J.S. Ultrasensitive plasma ctDNA KRAS assay for detection, prognosis, and assessment of therapeutic response in patients with unresectable pancreatic ductal adenocarcinoma. Oncotarget 2017, 8, 97769–97786. [Google Scholar] [CrossRef] [PubMed]
  121. Amaral, M.J.; Oliveira, R.C.; Donato, P.; Tralhao, J.G. Pancreatic Cancer Biomarkers: Oncogenic Mutations, Tissue and Liquid Biopsies, and Radiomics-A Review. Digestive diseases and sciences 2023, 68, 2811–2823. [Google Scholar] [CrossRef] [PubMed]
  122. Kinugasa, H.; Nouso, K.; Miyahara, K.; Morimoto, Y.; Dohi, C.; Tsutsumi, K.; Kato, H.; Matsubara, T.; Okada, H.; Yamamoto, K. Detection of K-ras gene mutation by liquid biopsy in patients with pancreatic cancer. Cancer 2015, 121, 2271–2280. [Google Scholar] [CrossRef]
  123. Kruger, S.; Heinemann, V.; Ross, C.; Diehl, F.; Nagel, D.; Ormanns, S.; Liebmann, S.; Prinz-Bravin, I.; Westphalen, C.B.; Haas, M.; et al. Repeated mutKRAS ctDNA measurements represent a novel and promising tool for early response prediction and therapy monitoring in advanced pancreatic cancer. Annals of oncology: official journal of the European Society for Medical Oncology 2018, 29, 2348–2355. [Google Scholar] [CrossRef]
  124. Tjensvoll, K.; Lapin, M.; Buhl, T.; Oltedal, S.; Steen-Ottosen Berry, K.; Gilje, B.; Soreide, J.A.; Javle, M.; Nordgard, O.; Smaaland, R. Clinical relevance of circulating KRAS mutated DNA in plasma from patients with advanced pancreatic cancer. Molecular oncology 2016, 10, 635–643. [Google Scholar] [CrossRef]
  125. Del Re, M.; Vivaldi, C.; Rofi, E.; Vasile, E.; Miccoli, M.; Caparello, C.; d'Arienzo, P.D.; Fornaro, L.; Falcone, A.; Danesi, R. Early changes in plasma DNA levels of mutant KRAS as a sensitive marker of response to chemotherapy in pancreatic cancer. Scientific reports 2017, 7, 7931. [Google Scholar] [CrossRef]
  126. Allard, W.J.; Matera, J.; Miller, M.C.; Repollet, M.; Connelly, M.C.; Rao, C.; Tibbe, A.G.; Uhr, J.W.; Terstappen, L.W. Tumor cells circulate in the peripheral blood of all major carcinomas but not in healthy subjects or patients with nonmalignant diseases. Clinical cancer research: an official journal of the American Association for Cancer Research 2004, 10, 6897–6904. [Google Scholar] [CrossRef]
  127. Husemann, Y.; Geigl, J.B.; Schubert, F.; Musiani, P.; Meyer, M.; Burghart, E.; Forni, G.; Eils, R.; Fehm, T.; Riethmuller, G.; et al. Systemic spread is an early step in breast cancer. Cancer cell 2008, 13, 58–68. [Google Scholar] [CrossRef]
  128. Pantel, K.; Brakenhoff, R.H. Dissecting the metastatic cascade. Nature reviews. Cancer 2004, 4, 448–456. [Google Scholar] [CrossRef]
  129. Polyak, K.; Weinberg, R.A. Transitions between epithelial and mesenchymal states: acquisition of malignant and stem cell traits. Nature reviews. Cancer 2009, 9, 265–273. [Google Scholar] [CrossRef]
  130. Rhim, A.D.; Mirek, E.T.; Aiello, N.M.; Maitra, A.; Bailey, J.M.; McAllister, F.; Reichert, M.; Beatty, G.L.; Rustgi, A.K.; Vonderheide, R.H.; et al. EMT and dissemination precede pancreatic tumor formation. Cell 2012, 148, 349–361. [Google Scholar] [CrossRef]
  131. Pantel, K.; Speicher, M.R. The biology of circulating tumor cells. Oncogene 2016, 35, 1216–1224. [Google Scholar] [CrossRef] [PubMed]
  132. Kaczor-Urbanowicz, K.E.; Cheng, J.; King, J.C.; Sedarat, A.; Pandol, S.J.; Farrell, J.J.; Wong, D.T.W.; Kim, Y. Reviews on Current Liquid Biopsy for Detection and Management of Pancreatic Cancers. Pancreas 2020, 49, 1141–1152. [Google Scholar] [CrossRef] [PubMed]
  133. Kulemann, B.; Liss, A.S.; Warshaw, A.L.; Seifert, S.; Bronsert, P.; Glatz, T.; Pitman, M.B.; Hoeppner, J. KRAS mutations in pancreatic circulating tumor cells: a pilot study. Tumour biology: the journal of the International Society for Oncodevelopmental Biology and Medicine 2016, 37, 7547–7554. [Google Scholar] [CrossRef] [PubMed]
  134. Xu, Y.; Qin, T.; Li, J.; Wang, X.; Gao, C.; Xu, C.; Hao, J.; Liu, J.; Gao, S.; Ren, H. Detection of Circulating Tumor Cells Using Negative Enrichment Immunofluorescence and an In Situ Hybridization System in Pancreatic Cancer. International journal of molecular sciences 2017, 18. [Google Scholar] [CrossRef]
  135. Rhim, A.D.; Thege, F.I.; Santana, S.M.; Lannin, T.B.; Saha, T.N.; Tsai, S.; Maggs, L.R.; Kochman, M.L.; Ginsberg, G.G.; Lieb, J.G.; et al. Detection of circulating pancreas epithelial cells in patients with pancreatic cystic lesions. Gastroenterology 2014, 146, 647–651. [Google Scholar] [CrossRef]
  136. Walczak, S.; Velanovich, V. An Evaluation of Artificial Neural Networks in Predicting Pancreatic Cancer Survival. Journal of gastrointestinal surgery: official journal of the Society for Surgery of the Alimentary Tract 2017, 21, 1606–1612. [Google Scholar] [CrossRef]
  137. Yang, Y.; Chen, H.; Wang, D.; Luo, W.; Zhu, B.; Zhang, Z. Diagnosis of pancreatic carcinoma based on combined measurement of multiple serum tumor markers using artificial neural network analysis. Chinese medical journal 2014, 127, 1891–1896. [Google Scholar] [CrossRef]
  138. Lee, J.; Lee, H.S.; Park, S.B.; Kim, C.; Kim, K.; Jung, D.E.; Song, S.Y. Identification of Circulating Serum miRNAs as Novel Biomarkers in Pancreatic Cancer Using a Penalized Algorithm. International journal of molecular sciences 2021, 22. [Google Scholar] [CrossRef] [PubMed]
  139. Hahn, M.A.; Singh, A.K.; Sharma, P.; Brown, S.C.; Moudgil, B.M. Nanoparticles as contrast agents for in-vivo bioimaging: current status and future perspectives. Analytical and bioanalytical chemistry 2011, 399, 3–27. [Google Scholar] [CrossRef]
  140. Rosenberger, I.; Strauss, A.; Dobiasch, S.; Weis, C.; Szanyi, S.; Gil-Iceta, L.; Alonso, E.; Gonzalez Esparza, M.; Gomez-Vallejo, V.; Szczupak, B.; et al. Targeted diagnostic magnetic nanoparticles for medical imaging of pancreatic cancer. Journal of controlled release: official journal of the Controlled Release Society 2015, 214, 76–84. [Google Scholar] [CrossRef] [PubMed]
  141. Luo, Y.; Li, Y.; Li, J.; Fu, C.; Yu, X.; Wu, L. Hyaluronic acid-mediated multifunctional iron oxide-based MRI nanoprobes for dynamic monitoring of pancreatic cancer. RSC advances 2019, 9, 10486–10493. [Google Scholar] [CrossRef] [PubMed]
  142. Zhuo, Y.; Yuan, R.; Chai, Y.Q.; Hong, C.L. Functionalized SiO2 labeled CA19-9 antibodies: a new strategy for signal amplification of antigen-antibody sensing processes. The Analyst 2010, 135, 2036–2042. [Google Scholar] [CrossRef] [PubMed]
  143. Jin, W.; Zhang, R.; Dong, C.; Jiang, T.; Tian, Y.; Yang, Q.; Yi, W.; Hou, J. A simple MWCNTs@paper biosensor for CA19-9 detection and its long-term preservation by vacuum freeze drying. International journal of biological macromolecules 2020, 144, 995–1003. [Google Scholar] [CrossRef]
Table 1. Biomarkers and combination biomarkers for the detection of PC.
Table 1. Biomarkers and combination biomarkers for the detection of PC.
Study reference Study Method Material Sample size Biomarkers Sensitivity Specificity AUC
Joergensen[63] Prospective case control Blood (PDAC/normal) 51/52 TIMP-1 47.1% 69.2% 0.64
Chen[66] Prospective case control Serum (PDAC/normal) 67/62 TTR 90.5% 47.6% 0.75
Mohamed[67] Cohort Serum (PDAC/non cancer) 50/27 ICAM-1 82% 82.6% 0.85
Park[80] Retrospective cohort Plasma (PDAC/non PDAC) 401/607 LRG1, TTR, and CA19-9 82.5% 92.1% 0.93
Brand[81] Cohort Serum (PDAC/healthy) 160/107 ICAM-1, OPG, and CA19-9 88% 90% 0.93
Kim[82] Cohort Blood (PDAC/healthy) 180/573 ApoA1, CA125, CA19-9, CEA, ApoA2, and TTR 93% 96% 0.993
Mellby[83] Case control Blood (PDAC/healthy) 443/888 Panel of 29 biomarkers 94% 95% 0.96
Table 2. The four investigated diagnostic microRNA panels: Panels I and II contrasted patients with PC against those with chronic pancreatitis and healthy individuals, while Panels III and IV solely compared PC patients to healthy individuals [99].
Table 2. The four investigated diagnostic microRNA panels: Panels I and II contrasted patients with PC against those with chronic pancreatitis and healthy individuals, while Panels III and IV solely compared PC patients to healthy individuals [99].
Panel I Panel II Panel III Panel IV
miR-16 miR-16 miR-16 miR-16
miR-27a miR-24 miR-27a miR-18.a
miR-30a.5p miR-27.a miR-25 miR-24
miR-323.3p miR-30a.5p miR-29c miR-27a
miR-20a miR323.3p miR-483.5p miR30a.5p
miR-29c miR-20a miR-323.3p
miR-483.5p miR-25 miR-20a
miR-29c miR-25
miR-483.5p miR-29c
miR-191
miR-345
miR-483.5p
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.
Copyright: This open access article is published under a Creative Commons CC BY 4.0 license, which permit the free download, distribution, and reuse, provided that the author and preprint are cited in any reuse.
The Clinical Applications of Selected Circulating Tumor Biomarkers in Patients with Pancreatic Neuroendocrine Tumors/Neoplasms

Violetta Rosiek

et al.

,

2023

Effectiveness of Abdominal Ultrasonography for Improving the Prognosis of Pancreatic Cancer during Medical Checkup: A Single Center Retrospective Analysis

Atsushi Yamaguchi

et al.

,

2022

Role of Selected Circulating Tumor Biomarkers in Patients with Skeletal Metastatic Pancreatic Neuroendocrine Neoplasms

Violetta Rosiek

et al.

,

2023

Prerpints.org logo

Preprints.org is a free preprint server supported by MDPI in Basel, Switzerland.

facebook logotwitter logolinkedin logo
MDPI Initiatives
Important Links
Subscribe

Disclaimer

Terms of Use

Privacy Policy

© 2024 MDPI (Basel, Switzerland) unless otherwise stated