title: Combined use of RGD-peptide modified PLGA and TGF-beta1 gene transfected MSCs to improve cell biobehaviors in vitro.
abstract: In order to improve the surface properties of PLGA polymer for a better material/cell interface to modulate the cells behaviors, we prepared a novel three-block copolymer, PLGA-[ASP-PEG], and immobilized an RGD-containing peptide, Gly-Arg-Gly-Asp-Ser-Pro-Cys (GRGDSPC) on the surface of it. Transforming growth factor-beta1 (TGF-beta1) was transfected into bone marrow stromal cells (MSCs) employed as seeded cells. Cell adhesion, spreading, proliferation and differentiation on this material were investigated. The results showed that the cell adhesive ratio on RGD-modified materials was higher than on un-modified materials (P<0.05). The extent of cell spreading was also wider on RGD-modified materials than on un-modified materials. Cell proliferation indices of transfected MSCs were increased as compared with the un-transfected MSCs (P<0.05). The ALP activities in the MSCs cultured with RGD-modified materials were higher than on un-modified materials after 14 days (P<0.05), and those in transfected MSCs were higher than in un-transfected MSCs (P<0.05). It was suggested that the combined use of RGD-modification and TGF-beta gene transfection could improve the interaction of biomaterial and cells.
authors.affiliation: Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. ortho@163.com
authors.forename: Changwen
authors.initials: C
authors.lastname: Li
authors.forename: Qixin
authors.initials: Q
authors.lastname: Zheng
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Guo
authors.forename: Daping
authors.initials: D
authors.lastname: Quan
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
mesh_terms: D000818:Animals; D040761:Biomimetic Materials; D001854:Bone Marrow Cells / Q000166:cytology / Q000378:metabolism; D002448:Cell Adhesion / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation; D002478:Cells, Cultured; D019344:Lactic Acid / Q000494:pharmacology*; D008297:Male; D009842:Oligopeptides / Q000494:pharmacology*; D010012:Osteogenesis / Q000187:drug effects; D011100:Polyglycolic Acid / Q000494:pharmacology*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D017154:Stromal Cells / Q000166:cytology / Q000378:metabolism*; D023822:Tissue Engineering; D054457:Tissue Scaffolds; D014162:Transfection; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
chemical_list: D009842:Oligopeptides; D011108:Polymers; D053773:Transforming Growth Factor beta1; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C047981:arginyl-glycyl-aspartic acid