Volume 59, Issue 6 pp. 2061-2073
CELLULAR THERAPIES

A double-virally-inactivated (Intercept–solvent/detergent) human platelet lysate for in vitro expansion of human mesenchymal stromal cells

Lassina Barro

Lassina Barro

International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan

Search for more papers by this author
Yu-Ting Su

Yu-Ting Su

Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

Research Center for Cell Therapy and Regeneration Medicine, Taipei Medical University, Taipei, Taiwan

Search for more papers by this author
Ouada Nebie

Ouada Nebie

Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan

Search for more papers by this author
Yu-Wen Wu

Yu-Wen Wu

Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan

Search for more papers by this author
Yen-Hua Huang

Yen-Hua Huang

Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

Research Center for Cell Therapy and Regeneration Medicine, Taipei Medical University, Taipei, Taiwan

International Ph.D. Program in Cell Therapy and Regeneration Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

Search for more papers by this author
Mickey BC Koh

Mickey BC Koh

Stem Cell Transplantation Programme, St. George's University Hospitals NHS Foundation Trust, Tooting, London, SW17 0QT, United Kingdom

Cell Therapy Programme, Blood Services Group, Health Sciences Authority, Singapore

Search for more papers by this author
Folke Knutson

Folke Knutson

Clinical Immunology and Transfusion Medicine IGP, Uppsala University, Uppsala, Sweden

Search for more papers by this author
Thierry Burnouf

Corresponding Author

Thierry Burnouf

International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan

Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan

International Ph.D. Program in Cell Therapy and Regeneration Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

Address reprint requests to: Thierry Burnouf, Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, 250 Wu-Xing Street, Taipei 11031, Taiwan; e-mail: [email protected]Search for more papers by this author
First published: 25 March 2019
Citations: 19

Abstract

BACKGROUND

Pooled human platelet lysate (HPL) can replace fetal bovine serum (FBS) as xeno-free supplement for ex vivo expansion of mesenchymal stromal cells (MSCs). We evaluate here whether a double-virally-inactivated HPL (DVI-HPL) prepared from expired Intercept-treated platelet concentrates (PCs) and treated by solvent/detergent (S/D) can be used for MSC expansion.

STUDY DESIGN AND METHODS

Expired Intercept-treated PCs in 65% platelet (PLT) additive solution were pooled and subjected to a 1% tri-n-butyl phosphate/1% Triton X-45 treatment followed by soybean oil, hydrophobic interaction chromatography purification, and sterile filtration. Bone marrow–derived MSCs (BM-MSCs) were expanded for four passages in growth medium containing 10% DVI-HPL, I-HPL (from Intercept-PC only), untreated HPL, and FBS. MSC morphology, doubling time, immunophenotype, immunosuppressive activity, and differentiation capacity were compared.

RESULTS

Expanded cells had typical spindle morphology and showed higher viability in all HPL conditions than in FBS. The DVI-HPL and FBS-expanded cells were morphologically larger than in I-HPL and HPL supplements. The cumulative population doubling was lower using DVI-HPL than with HPL and I-HPL, but significantly higher than using FBS. Immunophenotype was not affected by the supplements used. Immunosuppressive activity was maintained with all supplements. Differentiation capacity into chondrocytes and osteocytes was more effective in DVI-HPL but less toward adipocytes compared to other supplements.

CONCLUSIONS

Human PLT lysate made from Intercept-PCs subjected to S/D treatment may be an alternative to untreated HPL and to I-HPL for BM-MSC expansion. This finding reinforces the potential of HPL as a virally safe alternative to FBS for clinical grade MSC expansion protocols.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.