Cryopreservation of human bone marrow-derived mesenchymal stem cells with reduced dimethylsulfoxide and well-defined freezing solutions.
The aim of this study is to investigate the feasibility of using well defined, serum-free freezing solutions with a reduced level of dimethylsulfoxide (DMSO) of 7.5, 5, and 2.5% (v/v) in the combination with polyethylene glycol (PEG) or trehalose to cryopreserve human bone marrow-derived mesenchymal stem cells (hBMSCs), a main source of stem cells for cell therapy and tissue engineering. The standard laboratory freezing protocol of around 1°C/min was used in the experiments. The efficiency of 1,2-propandiol on cryopreservation of hBMSCs was explored. We measured the post-thawing cell viability and early apoptotic behaviors, cell metabolic activities, and growth dynamics. Cell morphology and osteogenic, adipogenic and chondrogenic differentiation capability were also tested after cryopreservation. The results showed that post-thawing viability of hBMSCs in 7.5% DMSO (v/v), 2.5% PEG (w/v), and 2% bovine serum albumin (BSA) (w/v) was comparable with that obtained in conventional 10% DMSO, that is, 82.9 ± 4.3% and 82.7 ± 3.7%, respectively. In addition, 5% DMSO (v/v) with 5% PEG (w/v) and 7.5% 1,2-propandiol (v/v) with 2.5% PEG (w/v) can provide good protection to hBMSCs when 2% albumin (w/v) is present. Enhanced cell viability was observed with the addition of albumin to all tested freezing solutions.
Liu
Yang
Y
Dalian R&D Center for Stem Cell and Tissue Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China.
Xu
Xia
X
Ma
Xuehu
X
Martin-Rendon
Enca
E
Watt
Suzanne
S
Cui
Zhanfeng
Z
D015925:Cryopreservation; D004121:Dimethyl Sulfoxide / Q000737:chemistry*; D005615:Freezing; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D011092:Polyethylene Glycols / Q000737:chemistry; D012996:Solutions; D014199:Trehalose / Q000737:chemistry
D012996:Solutions; D011092:Polyethylene Glycols; D014199:Trehalose; D004121:Dimethyl Sulfoxide