Laboratory Animal and Comparative Medicine ›› 2020, Vol. 40 ›› Issue (2): 87-94.DOI: 10.3969/j.issn.1674-5817.2020.02.001

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The Effects of Bone Morphogenetic Protein 4 Overexpression on Proliferation and Chondrogenesis of Rabbit Bone Marrow Stem Cells

ZHANG Fei1, DANG Yuan1, XUE Laien1, WEN Fuli1, ZHENG Heping1, HU Deqing2   

  1. 1. Fuzhou General Teaching Hospital of Bengbu Medical College,The 900th Hospital of The Joint Logistics Team,Fuzhou 350025, China;
    2. Department of Orthopedics, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350004, China
  • Received:2019-08-26 Online:2020-04-25 Published:2020-12-18
  • Contact: HU Deqing, E-mail: hudeqing1987@126.com

Abstract: Objective To investigate the effects of bone morphogenetic protein 4 (BMP-4) overexpression on the proliferation and chondrogenesis of rabbit bone marrow stem cells (BMSCs) infected by adenovirus. Methods The BMSCs were isolated and cultured by whole bone marrow adherence method, the purity of BMSCs was improved by subculture, the cells were identified by cell morphology and surface molecular marker by flow cytometry, and the optimal multiplicity of infection (MOI) of adenovirus was detected by inverted phase contrast microscopy and flow cytometry. The effects of BMP-4 overexpression on the secretion of type Ⅱ collagen (COLL Ⅱ), sry-related high mobility group-box gene 9 (Sox9) and BMP-4 in chondrocytes were analyzed by enzyme linked immunosorbent assay (ELISA) and Western blotting. The effect of BMP-4 overexpression on the proliferation of BMSCs in vitro was detcted by cell counting kit-8 (CCK-8). Results Primary cells were round, elliptical and spindle-shaped. The second generation cells were typical fibroblast-like long spindle-shaped, vortex-like distribution, with low expression of hematopoietic stem cell surface molecular markers CD34(1.94%) and CD45(2.13%), and high expression of CD44(98.2%), CD29(99.7%) and CD90(98.8%). MOI for 100, with higher infection efficiency and smallest damage to cells, is the most appropriate MOI. Compared with the control group, the overexpression of BMP-4 could significantly promote the proliferation of BMSCs and secrete a large number of COLL Ⅱ、Sox9 and BMP-4 proteins (P<0.05). Conclusion Overexpression of BMP-4 can significantly promote the proliferation and differentiation of BMSCs into chondrocytes in rabbit.

Key words: Bone marrow mesenchymal stem cells, Bone morphogenetic protein 4, Proliferation, Chondrogensis

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