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Recent Concepts for the Roles of Progenitor/stem Cell Niche in Heart Repair

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Date 2012 Jan 19
PMID 22254217
Citations 4
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Abstract

Progenitor/stem cell (PSC) has shown great promise for generation in failing heart. Advances in PSC biology have greatly enhanced our understanding of how PSC self-renewal, migration, maintenance of stemness, and cell-fate commitment depend on the balance of complex signals in their microenvironment. Endogenous PSC exists within structural and functional units known as PSC niches, which play important roles in directing PSC behavior. Recent years have witnessed great progress in our understanding of the PSC niche in cardiovascular biology. PSC based therapy could lead to successful cardiac regeneration or repair. Realizing the potential of therapeutic strategies is based on 1) differentiation of the PSC into all of the cellular constituents of the heart; 2) release of paracrine/ autocrine factors from the PSC; 3) fusion of the PSC with the existing constituents of the heart; and 4) stimulation of endogenous repair (regeneration of PSC niches). Importantly, cardiac PSC niches contain supporting cells and these cell-cell interactions have crucial regulatory roles in PSC based therapy. These findings have important implications for heart development, bioengineering, and furthermore elucidate a broader dimension of PSC control within the niche toward cardiomyocyte phenotype.

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