Preprint Article Version 1 This version is not peer-reviewed

Decoding Cold Mechanisms of Enhanced Bone Repair through Sensory Receptors and Molecular Pathways

Version 1 : Received: 28 August 2024 / Approved: 29 August 2024 / Online: 29 August 2024 (17:14:41 CEST)

How to cite: Zakaria, M.; Matta, J.; Honjol, Y.; Schupbach, D.; Mwale, F.; Harvey, E.; Merle, G. Decoding Cold Mechanisms of Enhanced Bone Repair through Sensory Receptors and Molecular Pathways. Preprints 2024, 2024082177. https://doi.org/10.20944/preprints202408.2177.v1 Zakaria, M.; Matta, J.; Honjol, Y.; Schupbach, D.; Mwale, F.; Harvey, E.; Merle, G. Decoding Cold Mechanisms of Enhanced Bone Repair through Sensory Receptors and Molecular Pathways. Preprints 2024, 2024082177. https://doi.org/10.20944/preprints202408.2177.v1

Abstract

Applying cold to a bone injury can aid healing, though its mechanisms are complex. This study investigates how cold therapy impacts bone repair to optimize healing. Cold was applied to a rodent bone model, with physiological responses analyzed. Vasoconstriction was mediated by an increase in TRP channels, TRPA1 (p=0.012) and TRPM8 (p<0.001), within cortical defects enhancing sensory response and blood flow regulation. Cold exposure also elevated hypoxia (p < 0.01) and VEGF expression (p < 0.001), promoting angiogenesis vital for bone regeneration. Increased expression of osteogenic proteins PGC-1α (p = 0.039) and RBM3 (p<0.008) suggests stimulated reparative processes. Enhanced osteoblast differentiation and ALP presence at days 5 (three-fold, p=0.014) and 10 (two-fold, p=0.010) were observed, along with increased osteocalcin (OCN) at day 10 (two-fold, p = 0.010) indicating presence of mature osteoblasts capable of mineralization. These findings highlight cold therapy's multifaceted effects on bone repair, offering insights for therapeutic strategies.

Keywords

Cold; Bone Healing; Tissue Engineering; Hypoxia; Vasculature; Osteogenesis; Shock Proteins; Osteoblasts

Subject

Medicine and Pharmacology, Orthopedics and Sports Medicine

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