Cryopreservation of bone marrow (BM), mobilized peripheral blood (mPB), and cord blood (CB) hematopoietic stem/progenitor cells (HSPCs) is a routine procedure before transplantation. The most commonly used cryoprotectant for HSPCs is dimethyl sulfoxide (DMSO). The objective of this
study was to evaluate the influence of DMSO on surface receptor expression and chemotactic activities of HSPCs. We found that 10 min of incubation of human mononuclear cells (MNCs) with 10% DMSO significantly increases the percentage of CXCR4+, CD38+, and CD34+
cells, resulting in an increase of CD34+, CD34+CXCR4+, and CD34+CXCR4+CD38− subpopulations. Furthermore, DMSO significantly increased chemotactic responsiveness of MNCs and CXCR4+ human hematopoietic Jurkat
cell line to a stromal cell-derived factor-1 (SDF-1) gradient. Furthermore, we demonstrated enhanced chemotaxis of human clonogenic progenitor cells to an SDF-1 gradient, which suggests that DMSO directly enhances the chemotactic responsiveness of early human progenitors. DMSO preincubation
also caused lower internalization of the CXCR4 receptor. In parallel experiments, we found that approximately 30% more of DMSO-preincubated human CD45+ and CD45+CD34+ cells homed to the mouse BM 24 h after transplantation in comparison to control cells. Finally,
we demonstrated considerably higher (25 days) survival of mice transplanted with DMSO-exposed MNCs than those transplanted with the control cells. We show in this study an unexpected beneficial influence of DMSO on HSPC homing and suggest that a short priming with DMSO before transplantation could be considered a new strategy to enhance cell homing and engraftment.
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Dimethyl sulfoxide (DMSO);
Hematopoietic stem/progenitor cells (HSPCs);
Document Type: Research Article
Department of Transplantation, Jagiellonian University Medical College, Cracow, Poland
Publication date: July 14, 2016
This article was made available online on September 4, 2015 as a Fast Track article with title: "Dimethylsulphoxide (DMSO) increases percentage of CXCR4+ hematopoietic stem/progenitor cells, their responsiveness to an SDF-1 gradient, homing capacities and survival".