MethodsX (Dec 2024)

Bioprocessing of human platelet concentrates to generate lysates and extracellular vesicles for therapeutic applications

  • Wei-Ting Yeh,
  • Ezrin Yi-Ling Yu,
  • Ya-Hsuan Lu,
  • Dora Livkisa,
  • Thierry Burnouf,
  • David J. Lundy

Journal volume & issue
Vol. 13
p. 102822

Abstract

Read online

This work describes protocols for preparing specific forms of human platelet lysates from pooled platelet concentrates (PCs) and the isolation of platelet-derived extracellular vesicles (p-EVs). Clinical-grade PCs can be sourced from blood establishments immediately following expiration for transfusion use. Here, we describe methods to process PCs into specific lysates from which p-EVs can be isolated. Each lysate type is prepared using platelet activation and processing methods which produce distinct products that may be useful in different applications. For example, serum-converted platelet lysate (SCPL)-EVs were recently shown to have powerful therapeutic properties following myocardial infarction in mice. EVs can be isolated from all products using size exclusion chromatography, producing pure and consistent p-EVs from multiple batches. Together, these methods allow isolation of p-EVs with excellent potential for clinical and preclinical applications. • Platelet concentrates (PCs) obtained from local blood establishments are reliable and sustainable sources to generate biomaterials. • We outline five distinct methods of platelet lysate generation and one method for extracellular vesicle isolation. • Each platelet lysate form has different biological properties which may be suitable for certain applications.

Keywords