Version 1
: Received: 1 September 2024 / Approved: 2 September 2024 / Online: 3 September 2024 (11:41:01 CEST)
How to cite:
Mahiny, D.; Hauck, L.; Premsingh, B.; Grothe, D.; Billia, F. Cdk1 Deficiency Extends the Post-natal Window of Cardiomyocyte Proliferation and Restores Cardiac Function After Myocardial Infarction. Preprints2024, 2024090147. https://doi.org/10.20944/preprints202409.0147.v1
Mahiny, D.; Hauck, L.; Premsingh, B.; Grothe, D.; Billia, F. Cdk1 Deficiency Extends the Post-natal Window of Cardiomyocyte Proliferation and Restores Cardiac Function After Myocardial Infarction. Preprints 2024, 2024090147. https://doi.org/10.20944/preprints202409.0147.v1
Mahiny, D.; Hauck, L.; Premsingh, B.; Grothe, D.; Billia, F. Cdk1 Deficiency Extends the Post-natal Window of Cardiomyocyte Proliferation and Restores Cardiac Function After Myocardial Infarction. Preprints2024, 2024090147. https://doi.org/10.20944/preprints202409.0147.v1
APA Style
Mahiny, D., Hauck, L., Premsingh, B., Grothe, D., & Billia, F. (2024). Cdk1 Deficiency Extends the Post-natal Window of Cardiomyocyte Proliferation and Restores Cardiac Function After Myocardial Infarction. Preprints. https://doi.org/10.20944/preprints202409.0147.v1
Chicago/Turabian Style
Mahiny, D., Daniela Grothe and Filio Billia. 2024 "Cdk1 Deficiency Extends the Post-natal Window of Cardiomyocyte Proliferation and Restores Cardiac Function After Myocardial Infarction" Preprints. https://doi.org/10.20944/preprints202409.0147.v1
Abstract
Cyclin-dependent kinase 1 (Cdk1) is a master regulator of the G2-M transition between DNA replication and cell division. This study investigates the regulation of cardiomyocyte (CM) proliferation during the early neonatal period and following ischemic injury in adult mice. We analyzed cell cycle dynamics with the assessment of DNA synthesis, and cytokinesis in murine hearts during the first 15 days after birth. A distinct proliferative block was observed at 1 day, followed by a second wave of DNA synthesis at 4 days, leading to CM binucleation (CMBN) by day 5. Genome-wide mRNA profiling revealed differential expression of cell cycle regulatory genes during this period, with a downregulation of factors involved in cell division and mitosis. The loss of Cdk1 impaired CMBN but extended the neonatal CM proliferation window until day 10 post-birth. In adult hearts, cardiac-specific ablation of Cdk1 triggered CM proliferation post-myocardial infarction (MI) in specific zones, driven by the activation of EGFR1 signaling and suppression of the anti-proliferative p38 and p53 signalling. This was accompanied by restoration of fractional shortening, mitochondrial function, and decreased reactive oxygen species. Additionally, cardiac hypertrophy was mitigated, and survival rates post-MI were increased in Cdk1 knockout mice. These findings reveal a novel role of Cdk1 in regulating cell cycle exit and re-entry in differentiated CM and offer insights into potential strategies for cardiac repair.
Biology and Life Sciences, Cell and Developmental Biology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
