Optimising platelet secretomes to deliver robust tissue-specific regeneration.

Published on Jan 1, 2020in Journal of Tissue Engineering and Regenerative Medicine3.078
· DOI :10.1002/TERM.2965
David Scully3
Estimated H-index: 3
(Hull York Medical School),
Peggy Sfyri4
Estimated H-index: 4
(Hull York Medical School)
+ 8 AuthorsAntonios Matsakas18
Estimated H-index: 18
Sources
Abstract
Promoting cell proliferation is the cornerstone of most tissue regeneration therapies. As platelet‐based applications promote cell division and can be customised for tissue‐specific efficacy, this makes them strong candidates for developing novel regenerative therapies. Therefore, the aim of this study was to determine if platelet releasate could be optimised to promote cellular proliferation and differentiation of specific tissues. Growth factors in platelet releasate were profiled for physiological and supra‐physiological platelet concentrations. We analysed the effect of physiological and supra‐physiological releasate on C2C12 skeletal myoblasts, H9C2 rat cardiomyocytes, human dermal fibroblasts (HDF), HaCaT keratinocytes and chondrocytes. Cellular proliferation and differentiation were assessed through proliferation assays, mRNA and protein expression. We show that supra‐physiological releasate is not simply a concentrated version of physiological releasate. Physiological releasate promoted C2C12, HDF and chondrocyte proliferation with no effect on H9C2 or HaCaT cells. Supra‐physiological releasate induced stronger proliferation in C2C12 and HDF cells compared to physiological releasate. Importantly, supra‐physiological releasate induced proliferation of H9C2 cells. The proliferative effects of skeletal and cardiac muscle cells were in part driven by VEGFα. Furthermore, supra‐physiological releasate induced differentiation of H9C2 and C2C12, HDF and keratinocyte differentiation. This study provides insights into the ability of releasate to promote muscle, heart, skin and cartilage cell proliferation and differentiation and highlights the importance of optimising releasate composition for tissue‐specific regeneration.
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