Dongmei Yan,1,* Botao Tang,2,* Lixin Yan,3 Lei Zhang,1 Meijuan Miao,1 Xi Chen,4 Guangyi Sui,5 Qi Zhang,1 Daoyuan Liu,1 Hui Wang1

1Department of Blood Transfusion, The Second Affiliated Hospital of Harbin Medical University, Harbin, Peoples Republic of China; 2Department of Cardiology, Heilongjiang Red Cross Hospital, Harbin, Peoples Republic of China; 3Department of Laboratory Medicine, The Second Affiliated Hospital of Harbin Medical University, Harbin, Peoples Republic of China; 4Department of Hematology, The Second Affiliated Hospital of Harbin Medical University, Harbin, Peoples Republic of China; 5Ethics Committee, The Tumor Hospital Affiliated to Harbin Medical University, Harbin, Peoples Republic of China

*These authors contributed equally to this work

Correspondence: Hui WangDepartment of Blood Transfusion, The Second Affiliated Hospital, Harbin Medical University, Xuefu Road No. 246, Nangang District, Harbin, Heilongjiang Province, Peoples Republic of ChinaTel +86-451-86605134Email wanghui@hrbmu.edu.cn

Purpose: Sodium selenite (Na2SeO3) has been known to restore the antioxidant capacity of bone marrow mesenchymal stem cells (BMSCs), reduce the production of reactive oxygen species (ROS) in the cells, and promote cell proliferation and inhibit cell apoptosis. However, it is still not clear whether selenium can mediate the differentiation and inhibit the induced hemagglutination of BMSCs. In this study, we attempted to explore the effect of Na2SeO3 on these aspects of BMSCs.Methods: We evaluated the fate of the MSCs isolated from the bone marrow of mice by studying their differentiation and proliferation after treatment with Na2SeO3. We also simultaneously evaluated the coagulation reaction induced by Na2SeO3-treated BMSCs in vitro.Results: While the mice-derived BMSCs expressed CD44, CD73, CD90, and CD105, they did not express CD45. The morphology of the derived cells was homogeneously elongated. These results showed that the isolated cells are indeed BMSCs. We found that 0.1 M and 1 M of Na2SeO3 promoted the proliferation and apoptosis of BMSCs, respectively. This showed that Na2SeO3 can be toxic and exert certain side effects on the BMSCs. The results of the osteogenic and adipogenic assay showed that 0.1 M Na2SeO3 could significantly promote the osteogenic and adipogenic differentiation of BMSCs by upregulating the lipid factors (LPL and PPRAG) and osteogenic factors, RUNX2, COL1, and BGP, in a concentration-dependent manner. Coagulation experiments in animals (mice and rats) revealed that Na2SeO3 can reduce the coagulation time of BMSCs in a concentration-dependent manner, which is related to the high expression of hematopoietic factors (SDF-1, GM-CSF, IL-7, IL-8, IL-11, and SCF).Conclusion: Na2SeO3 promotes the proliferation and differentiation as well as reduces the coagulation time of BMSCs, and this effect might enhance the therapeutic effect of BMSCs.

Keywords: sodium selenite, BMSCs, proliferation, differentiation, coagulation factors, clotting time

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