title: In vitro investigation of maleated poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) for its biocompatibility to mouse fibroblast L929 and human microvascular endothelial cells.
abstract: Poly (3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx), a polyester with strong mechanical properties and biocompatibility, is a member of microbial polyhydroxyalkanoates (PHA) family. Maleic anhydride was used to graft PHBHHx to form maleated PHBHHx (Ma-PHBHHx). Ma-PHBHHx with a graft degree of 0.59% was found to be more thermo-stable in comparison with PHBHHx. In vitro study demonstrated that the biocompatibility to mouse fibroblast L929 and human microvascular endothelial cells (HMEC) was improved in different degrees on Ma-PHBHHx films and scaffolds. Compared with their growth on PHBHHx, L929 and HMEC grown on Ma-PHBHHx films and scaffolds showed approximately 120% and 260% more in proliferation rates, respectively. Morphology study suggested that fine whorl-like surface structures with porosities on Ma-PHBHHx films attributed to MA grafting would be better for cell attachment and proliferation. Ma-PHBHHx scaffolds prepared by thermally induced phase separation (TIPS) with increased porosity, hydrophilicity, surface energy, and charges also were more favorable for cell growth. In addition, Ma-PHBHHx showed an accelerated degradation incubation in SBF at 37 degrees C, losing 21.4% of its original weight after 21 weeks while PHBHHx just lost 7.3%. Based on the improved biocompatibility, reasonable mechanical properties as well as accelerated biodegradation, Ma-PHBHHx has shown advantages over PHBHHx as a biomaterial for biomedical applications.
authors.affiliation: Multidisciplinary Research Center, Shantou University, Shantou 515063, Guangdong, China.
authors.forename: Xiao-Tao
authors.initials: XT
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Sun
authors.forename: Song
authors.initials: S
authors.lastname: Chen
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Chen
mesh_terms: D020155:3-Hydroxybutyric Acid / Q000737:chemistry*; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002208:Caproates / Q000737:chemistry*; D002448:Cell Adhesion; D002460:Cell Line; D049109:Cell Proliferation; D006801:Humans; D008299:Maleic Anhydrides / Q000737:chemistry; D051379:Mice; D018613:Microscopy, Confocal; D016062:Porosity; D013499:Surface Properties; D023822:Tissue Engineering; D054457:Tissue Scaffolds; D000094122:Polyhydroxybutyrates
chemical_list: D020155:3-Hydroxybutyric Acid; D001672:Biocompatible Materials; D002208:Caproates; D008299:Maleic Anhydrides; C115940:poly(3-hydroxybutyrate-co-3-hydroxyhexanoate); D000094122:Polyhydroxybutyrates