期刊
BONE
卷 78, 期 -, 页码 34-45出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.bone.2015.04.044
关键词
Mesenchymal stem cells; Hypoxia; Tissue regeneration; Stem cell microenvironment interaction
资金
- Bio AMP
- Medical Technology Development Program of the National Research Foundation (NRF) - Korean government (MEST) [2012M3A9C6049862, 2012M3A9B2052521]
- National Research Foundation of Korea [2012M3A9B2052521, 2012M3A9C6049862] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Human bone marrow mesenchymal stem cells (hBMSCs) were isolated from bone marrow of the vertebral body. The hBMSCs were cultured under either hypoxic (1% O-2) or normoxic (21% O-2; control) conditions and the characteristics as mesenchymal stem cells were compared. Results revealed that hypoxia reduced proliferative potential and colony-forming efficiency of hBMSCs, and significantly enhanced osteogenic and chondrogenic differentiation. The hBMSCs enhanced the regenerative potential of bone in vivo. In vitro synthesis of soluble and insoluble collagen was significantly increased in the hypoxic condition. In vivo collagen tissue regeneration was also enhanced under the hypoxic condition, with concomitant increased expressions of various subtypes of collagen and lysyl-oxidase family mRNA. MicroRNA assays revealed that miR-155-5p, which negatively regulates HIF-1 alpha, was significantly highly expressed. These observations demonstrate that hBMSCs obtained from human vertebrae exhibit altered characteristics under hypoxic conditions, and each factor contributing to hBMSC-mediated tissue healing should be evaluated with the goal of allowing their clinical application. (C) 2015 Elsevier Inc. All rights reserved.
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