Equine platelet lysate as an alternative to fetal bovine serum in equine mesenchymal stromal cell culture - too much of a good thing?

Equine Veterinary Journal
K A Russell, T Koch

Abstract

Multipotent mesenchymal stromal cells (MSC) are often culture-expanded in vitro. Presently, expansion medium (EM) for MSC is supplemented with fetal bovine serum (FBS). However, increasing cost, variable composition and potential risks associated with bovine antigens call for alternatives. Platelet lysate (PL) has shown promise as an alternative supplement. To determine how equine umbilical cord blood (CB) MSC proliferate in EM enriched with PL or FBS at various concentrations. Randomised dose escalation study. Platelet concentrate was generated from 5 equine whole blood samples through a double centrifugation method and standardised to 1 × 10(12) platelets/l prior to a freeze/thaw cycle to produce PL. Pooled PL or pooled FBS was added to EM at concentrations of 5% to 60%. Proliferation of 4 equine CB-MSC cultures was determined after 4 days using a resazurin semiquantitative assay. Cord blood-MSC proliferated with a dose-dependent response with no significant difference found between PL and FBS up to a 30% concentration. Beyond 30%, proliferation fell in the PL-cultured cells, while continued dose-dependent proliferation was noted in the FBS-cultured cells. Despite reduced cell numbers in high PL concentrations, live/dead stai...Continue Reading

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Citations

Feb 9, 2021·Frontiers in Bioengineering and Biotechnology·A HagenJ Burk

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