title: Plasma-treated, collagen-anchored polylactone: Its cell affinity evaluation under shear or shear-free conditions.
abstract: Poly(L-lactic acid)(PLLA) and poly(L-lactic-co-glycolic acid) (PLGA) (85/15) were modified by plasma treatment. Then they were collagen anchored (PT/CA), and the cell affinity was evaluated by cell culture under shear or shear-free conditions. A convenient and "intuitionistic" dyeing method has been proposed for measuring the modified depth when plasma treatment is applied for the treatment of porous scaffolds. A parallel plate flow chamber was developed in order to study the cell affinity of a material under shear stress. Our results show that a porous scaffold can be modified by plasma treatment and that a depth of about 4.0 mm for this modification can be reached with NH(3) plasma treatment (50 w, 20 Pa, 5 min). PT/CA modification is an effective surface modification method for facilitating cell transplantation and improving the cell affinity of three-dimensional porous cell scaffolds in tissue engineering. It can solve the problem of non-uniform cell distribution in most synthetic porous cell scaffolds. Using the flow chamber system, a series of quantitative data, including cell adherent fraction, cell area, and mean shape, were compared to evaluate the cell affinity of PLLA before and after PT/CA modification. The results indicate that the quality of cell attachment on PT/CA-modified PLLA apparently is better than that on unmodified PLLA. The flow chamber system potentially may be a tool for evaluating surface modification methods.
authors: Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
authors: Jian
authors: J
authors: Yang
authors: Yuqing
authors: Y
authors: Wan
authors: Junlin
authors: J
authors: Yang
authors: Jianzhong
authors: J
authors: Bei
authors: Shenguo
authors: S
authors: Wang
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry* / Q000378:metabolism; D018929:Cell Culture Techniques / Q000295:instrumentation / Q000379:methods*; D002455:Cell Division; D048429:Cell Size; D002470:Cell Survival; D003094:Collagen / Q000378:metabolism*; D006016:Glycolates / Q000737:chemistry* / Q000378:metabolism; D019344:Lactic Acid / Q000737:chemistry* / Q000378:metabolism; D008422:Materials Testing; D051379:Mice; D011091:Polyesters; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry* / Q000378:metabolism; D033081:Shear Strength
chemical_list: D001672:Biocompatible Materials; D006016:Glycolates; D011091:Polyesters; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C033616:poly(lactide); D003094:Collagen