title: Immunomodulatory and osteogenic differentiation effects of mesenchymal stem cells by adenovirus-mediated coexpression of CTLA4Ig and BMP2.
abstract: Many reports have previously utilized a human bone morphogenetic protein 2 (BMP2)-expressing recombinant adenoviral vector (AdBMP2) and mesenchymal stem cells (MSCs) for osteoinductive gene therapy. However, immunosuppression is essential for osteoinduction by AdBMP2, and this is one of the major impediments to its clinical use. In the present study, in vitro propagated MSCs were transduced using an adenoviral (Ad) vector to express the gene encoding cytotoxic T lymphocyte antigen 4-immunoglobulin (CTLA4Ig). Lymphocyte response was induced by allogeneic-irradiated MSCs as stimulators. We also examined the effects of cotransfection with a combination of the CTLA4Ig and the BMP2 gene on osteoblastic cell differentiation. The results showed that BMP2 gene transfected MSC elicited significant stimulatory responses, and one-way MLR reactions were significantly blunted by CTLA4Ig. Further study demonstrates that cotransfection of MSCs with the combination of the CTLA4Ig and the BMP2 gene stimulates osteoblastic cell differentiation in vitro. The findings suggest that genetic engineering of MSCs to express an immunosuppressive molecule in combination with an osteogenic protein gene may have potential application in the treatment of several genetic diseases and in bone reconstruction.
authors.affiliation: Joint Orthopaedic Laboratory of Institute of Health Sciences and Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Chinese Academy of Sciences, 225 South Chongqing Road, Shanghai, People's Republic of China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Zhang
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Tingting
authors.initials: T
authors.lastname: Tang
authors.forename: Zhihu
authors.initials: Z
authors.lastname: Qu
authors.forename: Jueren
authors.initials: J
authors.lastname: Lou
authors.forename: Kerong
authors.initials: K
authors.lastname: Dai
mesh_terms: D000069594:Abatacept; D000256:Adenoviridae / Q000235:genetics; D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000235:genetics / Q000378:metabolism*; D002113:Calcification, Physiologic; D002454:Cell Differentiation; D049109:Cell Proliferation; D015870:Gene Expression; D018014:Gene Transfer Techniques; D005822:Genetic Vectors; D006801:Humans; D018796:Immunoconjugates / Q000235:genetics / Q000378:metabolism*; D007155:Immunologic Factors / Q000378:metabolism*; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D010006:Osteoblasts / Q000166:cytology; D010012:Osteogenesis / Q000502:physiology*; D013601:T-Lymphocytes / Q000166:cytology; D014162:Transfection; D016212:Transforming Growth Factor beta / Q000235:genetics / Q000378:metabolism*; D019076:Transgenes
chemical_list: C525718:BMP2 protein, human; C525719:Bmp2 protein, mouse; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D018796:Immunoconjugates; D007155:Immunologic Factors; D016212:Transforming Growth Factor beta; D000069594:Abatacept; D000469:Alkaline Phosphatase