Human Platelet Lysate Supports Efficient Expansion and Stability of Wharton's Jelly Mesenchymal Stromal Cells via Active Uptake and Release of Soluble Regenerative Factors

Int J Mol Sci. 2020 Aug 31;21(17):6284. doi: 10.3390/ijms21176284.

Abstract

Manufacturing of mesenchymal stromal cell (MSC)-based therapies for regenerative medicine requires the use of suitable supply of growth factors that enhance proliferation, cell stability and potency during cell expansion. Human blood derivatives such as human platelet lysate (hPL) have emerged as a feasible alternative for cell growth supplement. Nevertheless, composition and functional characterization of hPL in the context of cell manufacturing is still under investigation, particularly regarding the content and function of pro-survival and pro-regenerative factors. We performed comparative analyses of hPL, human serum (hS) and fetal bovine serum (FBS) stability and potency to support Wharton's jelly (WJ) MSC production. We demonstrated that hPL displayed low inter-batch variation and unique secretome profile that was not present in hS and FBS. Importantly, hPL-derived factors including PDGF family, EGF, TGF-alpha, angiogenin and RANTES were actively taken up by WJ-MSC to support efficient expansion. Moreover, hPL but not hS or FBS induced secretion of osteoprotegerin, HGF, IL-6 and GRO-alpha by WJ-MSC during the expansion phase. Thus, hPL is a suitable source of factors supporting viability, stability and potency of WJ-MSC and therefore constitutes an essential raw material that in combination with WJ-MSC introduces a great opportunity for the generation of potent regenerative medicine products.

Keywords: Wharton’s Jelly Mesenchymal Stromal Cells; cytokines; human growth factors; human platelet lysate.

MeSH terms

  • Blood Platelets / metabolism*
  • Cell Culture Techniques
  • Cell Differentiation*
  • Cell Proliferation
  • Cells, Cultured
  • Humans
  • Intercellular Signaling Peptides and Proteins / metabolism*
  • Mesenchymal Stem Cells / cytology*
  • Mesenchymal Stem Cells / metabolism
  • Regenerative Medicine*
  • Umbilical Cord / cytology*
  • Umbilical Cord / metabolism
  • Wharton Jelly / cytology*
  • Wharton Jelly / metabolism

Substances

  • Intercellular Signaling Peptides and Proteins