Abstract:
:Stem cell-based therapies have demonstrated great potential for the treatment of cardiac diseases, for example, myocardial infarction; however, low cell viability, low retention/engraftment, and uncontrollable in vivo differentiation after transplantation are still major limitations, which lead to low therapeutic efficiency. Biomaterials provide a promising solution to overcome these issues due to their biocompatibility, biodegradability, low/nonimmunogenicity, and low/noncytotoxicity. The present study aimed to investigate the impacts of keratose (KOS) hydrogel biomaterial on cellular viability, proliferation, and differentiation of c-kit+ human cardiac stem cells (hCSCs). Briefly, hCSCs were cultured on both KOS hydrogel-coated dishes and regular tissue culture dishes (Blank control). Cell viability, stemness, proliferation, cellular morphology, and cardiac lineage differentiation were compared between KOS hydrogel and the Blank control at different time points. We found that KOS hydrogel is effective in maintaining hCSCs without any observable toxic effects, although cell size and proliferation rate appeared smaller on the KOS hydrogel compared to the Blank control. To our surprise, KOS hydrogel significantly promoted vascular smooth muscle cell (VSMC) differentiation (∼72%), while on the Blank control dishes, most of the hCSCs (∼78%) became cardiomyocytes. Furthermore, we also observed "endothelial cell tube-like" microstructures formed by differentiated VSMCs only on KOS hydrogel, suggesting a potential capability of the hCSC-derived VSMCs for in vitro angiogenesis. To the best of our knowledge, this is the first report to discover the preferred differentiation of hCSCs toward VSMCs on KOS hydrogel. The underlying mechanism remains unknown. This innovative methodology may offer a new approach to generate a robust number of VSMCs simply by culturing hCSCs on KOS hydrogel, and the resulting VSMCs may be used in animal studies and clinical trials in combination with an injectable KOS hydrogel to treat cardiovascular diseases.
journal_name
Stem Cells Devjournal_title
Stem cells and developmentauthors
Ledford BT,Simmons J,Chen M,Fan H,Barron C,Liu Z,Van Dyke M,He JQdoi
10.1089/scd.2016.0351subject
Has Abstractpub_date
2017-06-15 00:00:00pages
888-900issue
12eissn
1547-3287issn
1557-8534journal_volume
26pub_type
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