Effects of human platelet lysate on the growth of cultured human corneal endothelial cells

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Constantinos Petsoglou - , Sydney Hospital and Sydney Eye Hospital (Author)
  • Li Wen - , New South Wales Organ & Tissue Donat Serv, New South Wales Tissue Bank (Author)
  • Monira Hoque - , New South Wales Organ & Tissue Donat Serv, New South Wales Tissue Bank (Author)
  • Meidong Zhu - , University of Sydney (Author)
  • Monika Valtink - , Institute of Anatomy (Author)
  • Gerard Sutton - , Sydney Hospital and Sydney Eye Hospital (Author)
  • Jingjing You - , University of Sydney (Author)

Abstract

Human platelet lysate (hPL) as a replacement for foetal bovine serum (FBS) in culturing human corneal endothelium is an emerging area of interest, although there are limited studies evaluating the quality of the hPL being used. Our study aimed to evaluate variations between sources of hPL and to explore the efficacy of hPL (with and without heparin) as a replacement for FBS in culturing human corneal endothelial cells in vitro. Immortalized human corneal endothelial cells (B4G12) and primary human corneal endothelial cells (PHCEnCs, n = 11 donors, age from 36 to 85 years old) were cultured with 5% hPL or FBS. A full characterisation of the effects of hPL and FBS on cell growth was conducted using IncuCyte Zoom (percentage cell confluence and population doubling time, PDT) to analyse cell proliferation. AlamarBlue assays were used to measure cell viability. The concentration of fibrinogen, PDGF, hEGF, VEGF and bFGF in two sources of hPL were analyzed by Enzyme-linked immunosorbent assay. Expression and localization of Na+/K+-ATPase, ZO-1 and CD166 on PHCEnCs and B4G12 cells were assessed with immunofluorescence and immunoblotting. Our results showed that a significant difference in fibrinogen, hEGF and VEGF concentrations was found between two sources of hPL. Heparin impaired the positive effect of hPL on cell growth. PDT and alamarBlue showed that hPL significantly increased proliferation and viability of PHCEnCs in two of three donors, and immunostaining indicated that hPL increased ZO-1 and CD166 expression but not Na+/K+-ATPase on PHCEnCs. In addition, heterogeneities on immunopositivity of Na+/K+ATPase and ZO-1 and morphology were found on PHCEnCs derived from an individual donor cultured with hPL medium. In conclusion, hPL showed positive effect on primary corneal endothelial cell growth, and maintenance of their cellular characteristics compared to FBS. hPL can be considered as a supplement to replace FBS in PHCEnC culture. However, the variation observed between different hPL sources suggests that a standard quality control monitoring system such as storage time and a minimal concentration of growth factors may need to be established.

Details

Original languageEnglish
Article number108613
Number of pages9
JournalExperimental Eye Research
Volume208
Publication statusPublished - Jul 2021
Peer-reviewedYes

External IDs

Scopus 85107150000
ORCID /0000-0003-3205-1876/work/142256441

Keywords

Keywords

  • Human platelet lysate, Fibrinogen, Human corneal endothelial cells, IncuCyte ZOOM, MESENCHYMAL STEM-CELLS, HEPARIN CONCENTRATION, DONOR CORNEAS, EX-VIVO, SERUM, SUPPLEMENTS, EXPANSION, LINES