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This study investigates how mesenchymal stem cell's (MSCs) proliferation and migration abilities are influenced by various platelet products (PP). Donor‐matched, clinical‐, and control laboratory‐standard PPs were generated and assessed based on their platelet and leukocyte concentrations. Bone marrow derived MSCs were exposed to these PP to quantify their effect on in vitro MSC proliferation and migration. An adapted colony forming unit fibroblast (CFU‐F) assay was carried out on bone marrow aspirate using clinical‐standard PP‐loaded electrospun poly( ϵ ‐caprolactone) (PCL) membrane to mimic future clinical applications to contain bone defects. Clinical‐standard PP had lower platelet (2.5 fold,  p  < 0.0001) and higher leukocyte (14.1 fold,  p  < 0.0001) concentrations compared to laboratory‐standard PP. It induced suboptimal MSC proliferation compared to laboratory‐standard PP and fetal calf serum (FCS). All PP induced significantly more MSC migration than FCS up to 24 h. The removal of leukocytes from PP had no effect on MSC proliferation or migration. The PP‐loaded membranes successfully supported MSC colony formation. This study indicates that platelet concentrations in PP impact MSC proliferation more than the presence of leukocytes, whilst MSC migration in response to PP is not influenced by platelet or leukocyte numbers. Clinical‐standard PP could be applied alongside manufactured membranes in the future treatment of bone reconstruction. © 2019 The Authors.  Journal of Orthopaedic Research ® Published by Wiley Periodicals, Inc. on behalf of Orthopaedic Research Society. J Orthop Res 37:1329–1338, 2019.

Optimising proliferation and migration of mesenchymal stem cells using platelet products: A rational approach to bone regeneration