title: In vitro chondrogenesis of human bone marrow-derived mesenchymal progenitor cells in monolayer culture: activation by transfection with TGF-beta2.
abstract: Bone marrow-derived mesenchymal progenitor cells are capable of chondrogenesis, making them a possible source of cells for cartilage tissue engineering. Because of this, we studied the effect of human transforming growth factor beta2 (TGF-beta2) on mesenchymal progenitor cell chondrogenesis in monolayer culture using gene transfection technology. A recombinant pcDNA3.1(+)/TGF-beta2 construct containing a full-length TGF-beta2 from a human placental cDNA library was created through gene cloning and DNA recombination. The construct was then lipofected into mesenchymal progenitor cells isolated from human bone marrow. RT-PCR, Western blotting, and immunohistochemistry analyses were performed to identify the expression of TGF-beta2 and cartilage-associated genes and proteins. The results showed that TGF-beta2 was expressed throughout the culture period. The transfected progenitor cells expressed and produced collagen type II and aggrecan 48 h after transfection, and the expression and synthesis were upregulated after 4 weeks. In contrast, the tested genes and proteins were not detected in non-transfected cells. This shows that transfection of pcDNA3.1(+)/TGF-beta2 into mesenchymal progenitor cells is able to provide transient and persistent expression of cartilage-specific genes and proteins, and suggests that the differentiation of human marrow-derived mesenchymal progenitor cells into chondrocytes in monolayer culture is feasible and may be induced by TGF-beta2.
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, 100083 Beijing, PR China. wangww@bjmu.edu.cn
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Wang
authors.forename: Si-Quan
authors.initials: SQ
authors.lastname: Lou
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Ju
authors.forename: Kun
authors.initials: K
authors.lastname: Xia
authors.forename: Jia-Hui
authors.initials: JH
authors.lastname: Xia
mesh_terms: D053674:Aggrecans; D001854:Bone Marrow Cells / Q000166:cytology* / Q000378:metabolism; D002454:Cell Differentiation / Q000502:physiology; D002478:Cells, Cultured; D020219:Chondrogenesis / Q000235:genetics*; D003001:Cloning, Molecular; D024043:Collagen Type II / Q000096:biosynthesis; D016326:Extracellular Matrix Proteins; D006801:Humans; D037181:Lectins, C-Type; D008648:Mesoderm / Q000166:cytology* / Q000378:metabolism; D011509:Proteoglycans / Q000096:biosynthesis; D012333:RNA, Messenger / Q000096:biosynthesis; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism; D014162:Transfection; D016212:Transforming Growth Factor beta / Q000235:genetics*; D053781:Transforming Growth Factor beta2
chemical_list: D053674:Aggrecans; D024043:Collagen Type II; D016326:Extracellular Matrix Proteins; D037181:Lectins, C-Type; D011509:Proteoglycans; D012333:RNA, Messenger; C509041:TGFB2 protein, human; D016212:Transforming Growth Factor beta; D053781:Transforming Growth Factor beta2