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Updated: Jun 22, 2025
08:42
Isolation, Culture and Transduction of Adult Mouse Cardiomyocytes
Published on: August 28, 2016
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Cyclin A2 Induces Cytokinesis in Human Adult Cardiomyocyte and Drives Reprogramming in Mice
Biorxiv : the Preprint Server for Biology
|July 1, 2024
Summary
Cyclin A2 (CCNA2) gene therapy successfully induced cytokinesis in adult human cardiomyocytes, promoting cardiac repair. This research offers a promising avenue for developing CCNA2-based cardiac regenerative therapies.
Area of Science:
- Cardiovascular Biology
- Regenerative Medicine
- Gene Therapy
Background:
- Postnatal mammalian cardiomyocytes typically silence Cyclin A2 (CCNA2), a key cell cycle regulator.
- Previous studies showed CCNA2 promotes cardiac repair in animal models via viral vector delivery.
- The impact of CCNA2 gene delivery on adult human cardiomyocyte cytokinesis remained unexplored.
Purpose of the Study:
- To investigate the effect of CCNA2 gene delivery on cytokinesis in isolated adult human cardiomyocytes.
- To explore the underlying transcriptional mechanisms of CCNA2-induced cardiac repair.
- To assess the potential of CCNA2 as a therapeutic agent for cardiac regeneration.
Main Methods:
- Developed a replication-deficient adenovirus vector encoding human CCNA2 under the cardiac Troponin T promoter.
- Utilized time-lapse live imaging of adult human primary cardiomyocytes from multiple donors.
- Performed single-nucleus and bulk RNA sequencing on transgenic mouse hearts and human adult/fetal hearts.
Main Results:
- CCNA2 gene delivery induced complete cytokinesis in adult human cardiomyocytes, preserving sarcomere integrity and showing active calcium mobilization.
- Single-nucleus transcriptomics revealed a subpopulation of cardiomyocytes with enriched cytokinesis and reprogramming genes in CCNA2-expressing mice.
- RNA sequencing identified key reprogramming genes relevant to CCNA2's effects in human cardiac tissue.
Conclusions:
- CCNA2 gene therapy can induce cytokinesis and promote cellular repair in adult human cardiomyocytes.
- Transcriptional analysis highlights CCNA2's role in cardiomyocyte proliferation and reprogramming.
- These findings support the clinical development of CCNA2-based cardiac regenerative therapies.
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