Recent advances in myocardial regeneration strategy

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Abstract
This review described the current status of research into the regeneration potential of myocardial cells after myocardial injury, focussing on possible mechanisms of regeneration and the application of animal models to human biology, all with the aim of evaluating any novel approaches to the regeneration of human cardiomyocytes. A literature review was undertaken of the PubMed® and The Cochrane Library databases using the search terms ‘regeneration’, ‘heart regeneration’, ‘cardiac regeneration’, ‘proliferation’, ‘animal model’, ‘repair’ and ‘myocardial cell injury’ in English language publications only. The search covered publications between 1 January 2002 to 31 December 2017. The cardiac regeneration capability significantly differed among different species. In lower vertebrates, such as zebrafish, cardiomyocytes possess a sustained regeneration capacity under specific conditions. In mammalian animals, such as mice, the cardiomyocytes retain a regeneration capability under specific conditions, which gradually declines. Inflammation, non-coding RNA, gene regulatory elements, signal transduction and cell phenotype transformation play pivotal roles in cardiomyocyte regeneration. Myocardial regeneration appears to be a viable repair strategy for cardiomyocyte loss, which deserves further research in order to validate its clinical applicability in humans.

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