Preparation method and growth factor content of platelet concentrate influence the osteogenic differentiation of bone marrow stromal cells

Francesca Perut, Giuseppe Filardo, Erminia Mariani, Annarita Cenacchi, Loredana Pratelli, Valentina Devescovi, Elizaveta Kon, Maurilio Marcacci, Andrea Facchini, Nicola Baldini, Donatella Granchi

Research output: Contribution to journalArticle

Abstract

Background aims: An extensive debate about the clinical benefits of autologous platelet concentrates used as a treatment option for patients with orthopedic injuries is ongoing. The aim of this study was to determine whether different compositions of platelet concentrates may affect the osteogenic differentiation of bone marrow stromal cells (BMSC). Methods: Pure platelet-rich plasma (P-PRP) and leukocyte-PRP (L-PRP) were characterized for platelet and leukocyte content. As an indicative marker of the delivery of growth factors (GFs), the release of basic fibroblast growth factor (bFGF) from platelet gel (PG) was measured at 1, 18, 48 and 72 h and at 7 d. The ability of different PGs to induce proliferation and differentiation of BMSC was evaluated by using bioactivity assays. Results: The platelet recovery was significantly higher in L-PRP, either fresh or frozen. PGs derived from L-PRP and P-PRP showed significant differences in terms of bFGF release and biological activity. bFGF release was faster both in fresh and frozen L-PRP preparations. Moreover, L-PRP samples were able to induce a significantly higher proliferation of BMSC compared with P-PRP or PPP samples. Even though all PG preparations allowed the deposition of mineral nodules in BMSC cultures, the mineralization activity correlated significantly with bFGF levels. Conclusions: The biological activity of platelet concentrates differs according to preparation technique, which affects platelet and leukocyte content and GF availability. Because GF levels are not always optimal in subjects with defective bone healing, composition and bioactivity of PRP should be analyzed to test the reliability and potential effectiveness of the regenerative treatment.

Original languageEnglish
Pages (from-to)830-839
Number of pages10
JournalCytotherapy
Volume15
Issue number7
DOIs
Publication statusPublished - Jul 2013

Keywords

  • bone marrow stromal cells
  • osteogenesis
  • platelet gel
  • platelet-rich plasma

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Molecular Medicine

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