title: [Biological characteristics of rabbit bone marrow mesenchymal stem cells and their response to different growth factors].
abstract: This study was aimed to analyze the biological characteristics of rabbit bone marrow mesenchymal stem cells (rBM-MSCs) and their response to different growth factors. Rabbit BM-MSCs were separated from bone marrow mononuclear cells by using adherent cultivation. Biological characteristics were investigated by optical and electron microscopy. Immunophenotype of rBM-MSCs was measured by flow cytometry. The expression of collagen was detected by RT-PCR. Differentiation potential was identified by specific staining and RT-PCR. The response of rBM-MSCs to IL-1, 3, 8 and HGF with different concentrations were tested by MTT. The results showed that the rBM-MSCs gave rise to a population of adherent cells characterized by the presence of a predominant cell type with a typical fibroblast-like morphology and could be cultured for over 15 passages. CD44 was highly expressed on F5 rBM-MSCs (32%) and CD45 was lowly expressed (4.7%). Type I collagen was highly expressed, while type II collagen was lowly expressed and type X collagen was not detected on rBM-MSCs using RT-PCR method. In various conditions inducting differentiation, rBM-MSCs could differentiate into the osteoblast, chondrocyte, adipocyte and neuron-like cells. The rBM-MSCs were sensitive to IL-3, even low concentration (10 ng/ml) of IL-3 could promote the proliferation of rBM-MSCs effectively (>32%, P < 0.01), whereas high concentration IL-3 inhibited it significantly. It is concluded that rabbit BM-MSCs were successfully isolated and culture-expanded. The biological characteristics of rabbit BM-MSCs are similar to those of human and rhesus BM-MSCs. IL-3 with low concentration can promote the proliferation of rBM-MSCs effectively, but high concentration of IL-3 can inhibit their proliferation.
authors.affiliation: Department of Cryomedicine, Qilu Hospital, Shandong University, Jinan 250012, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Bai-Jun
authors.initials: BJ
authors.lastname: Shen
authors.forename: Huai-Shui
authors.initials: HS
authors.lastname: Hou
authors.forename: Qing
authors.initials: Q
authors.lastname: Shi
authors.forename: Le-Ling
authors.initials: LL
authors.lastname: Zhang
authors.forename: Xiu-Feng
authors.initials: XF
authors.lastname: Ma
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology* / Q000502:physiology; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D016207:Cytokines / Q000494:pharmacology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology*; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000502:physiology; D011817:Rabbits; D011994:Recombinant Proteins
chemical_list: D016207:Cytokines; D011994:Recombinant Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor