TY - JOUR
T1 - Local manufacturing processes contribute to variability in human mesenchymal stromal cell expansion while growth media supplements contribute to variability in gene expression and cell function
T2 - a Biomedical Excellence for Safer Transfusion (BEST) collaborative study
AU - for Biomedical Excellence for Safer Transfusion (BEST)
AU - Shaz, Beth H.
AU - Schäfer, Richard
AU - Fontaine, Magali J.
AU - Norris, Philip J.
AU - McKenna, David H.
AU - Jin, Ping
AU - Reems, Jo Anna
AU - Stroncek, David
AU - Tanashi, Minoko
AU - Marks, Denese
AU - Geng, Huimin
AU - Pati, Shibani
N1 - Publisher Copyright:
© 2023 International Society for Cell & Gene Therapy
PY - 2023
Y1 - 2023
N2 - Background aims: Culture-derived mesenchymal stromal cells (MSCs) exhibit variable characteristics when manufactured using different methods, source material and culture media. The purpose of this multicenter study was to assess the impact on MSC expansion, gene expression and other characteristics when different laboratories expanded MSCs from cultures initiated with bone marrow−MSC aliquots derived from the same donor source material yet with different growth media. Methods: Eight centers expanded MSCs using four human platelet lysate (HPL) and one fetal bovine serum (FBS) products as media supplements. The expanded cells were taken through two passages then assessed for cell count, viability, doubling time, immunophenotype, cell function, immunosuppression and gene expression. Results were analyzed by growth media and by center. Results: Center methodologies varied by their local seeding density, feeding regimen, inoculation density, base media and other growth media features (antibiotics, glutamine, serum). Doubling times were more dependent on center than on media supplements. Two centers had appropriate immunophenotyping showing all MSC cultures were positive for CD105, CD73, CD90 and negative for CD34, CD45, CD14, HLA-DR. MSCs cultured in media supplemented with FBS compared with HPL featured greater T-cell inhibition potential. Gene expression analysis showed greater impact of the type of media supplement (HPL versus FBS) than the manufacturing center. Specifically, nine genes were decreased in expression and six increased when combining the four HPL-grown MSCs versus FBS (false discovery rate [FDR] <0.01), however, without significant difference between different sources of HPL (FDR <0.01). Conclusions: Local manufacturing process plays a critical role in MSC expansion while growth media may influence function and gene expression. All HPL and FBS products supported cell growth.
AB - Background aims: Culture-derived mesenchymal stromal cells (MSCs) exhibit variable characteristics when manufactured using different methods, source material and culture media. The purpose of this multicenter study was to assess the impact on MSC expansion, gene expression and other characteristics when different laboratories expanded MSCs from cultures initiated with bone marrow−MSC aliquots derived from the same donor source material yet with different growth media. Methods: Eight centers expanded MSCs using four human platelet lysate (HPL) and one fetal bovine serum (FBS) products as media supplements. The expanded cells were taken through two passages then assessed for cell count, viability, doubling time, immunophenotype, cell function, immunosuppression and gene expression. Results were analyzed by growth media and by center. Results: Center methodologies varied by their local seeding density, feeding regimen, inoculation density, base media and other growth media features (antibiotics, glutamine, serum). Doubling times were more dependent on center than on media supplements. Two centers had appropriate immunophenotyping showing all MSC cultures were positive for CD105, CD73, CD90 and negative for CD34, CD45, CD14, HLA-DR. MSCs cultured in media supplemented with FBS compared with HPL featured greater T-cell inhibition potential. Gene expression analysis showed greater impact of the type of media supplement (HPL versus FBS) than the manufacturing center. Specifically, nine genes were decreased in expression and six increased when combining the four HPL-grown MSCs versus FBS (false discovery rate [FDR] <0.01), however, without significant difference between different sources of HPL (FDR <0.01). Conclusions: Local manufacturing process plays a critical role in MSC expansion while growth media may influence function and gene expression. All HPL and FBS products supported cell growth.
KW - fetal bovine serum
KW - gene expression
KW - human platelet lysate
KW - manufacturing
KW - mesenchymal stromal cells
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U2 - 10.1016/j.jcyt.2023.11.003
DO - 10.1016/j.jcyt.2023.11.003
M3 - Article
C2 - 38043052
AN - SCOPUS:85178592973
SN - 1465-3249
JO - Cytotherapy
JF - Cytotherapy
ER -