title: Controlled release of PDGF-bb by coaxial electrospun dextran/poly(L-lactide-co-epsilon-caprolactone) fibers with an ultrafine core/shell structure.
abstract: Membranes composed of dextran (DEX) and poly(L-lactide-co-epsilon-caprolactone) (PLCL) as ultrafine core/shell fibers for loading platelet-derived growth factor-bb (PDGF-bb) were produced by coaxial electrospinning. The morphology and core/shell structure of the DEX/PLCL fibers containing PDGF-bb were investigated by scanning electron microscopy and transmission electron microscopy. The loading amount of PDGF-bb in the DEX/PLCL membrane prepared at 0.1 ml/h of the inner solution flow rate (DEX/PLCL-1P) was much lower than that in DEX/PLCL-2P and DEX/PLCL-3P obtained at 0.2 ml/h and 0.3 ml/h inner solution flow rate, respectively. All three membranes showed obvious burst release of PDGF-bb in the first 2 days, and then the release behaviors were smoother and steadier. They all kept a fibrous morphology during the whole release period of 28 days. Studies on adhesion, proliferation and morphology of the vascular smooth muscle cells on the fibrous membranes of DEX/PLCL-1P, DEX/PLCL-2P and DEX/PLCL-3P, as well as PLCL and DEX/PLCL suggested that DEX/PLCL membranes containing PDGF-bb protected in the core of ultrafine fibers could positively promote cell attachment, and their cell activities were significantly higher than those of PLCL and DEX/PLCL membranes without PDGF-bb. The DEX/PLCL-2P membrane with fine core/shell structure of fibers would be the best choices for further applications.
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China.
authors.forename: Hua
authors.initials: H
authors.lastname: Li
authors.forename: Chenguang
authors.initials: C
authors.lastname: Zhao
authors.forename: Zhexiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Yuan
authors.forename: Deling
authors.initials: D
authors.lastname: Kong
mesh_terms: D000818:Animals; D000077214:Becaplermin; D001672:Biocompatible Materials / Q000737:chemistry; D002448:Cell Adhesion; D002470:Cell Survival; D002478:Cells, Cultured; D003692:Delayed-Action Preparations / Q000737:chemistry*; D003911:Dextrans / Q000737:chemistry*; D008297:Male; D032389:Myocytes, Smooth Muscle / Q000166:cytology; D010982:Platelet-Derived Growth Factor / Q000008:administration & dosage* / Q000378:metabolism; D011091:Polyesters / Q000737:chemistry*; D020574:Proto-Oncogene Proteins c-sis; D051381:Rats; D017208:Rats, Wistar
chemical_list: D001672:Biocompatible Materials; D003692:Delayed-Action Preparations; D003911:Dextrans; D010982:Platelet-Derived Growth Factor; D011091:Polyesters; D020574:Proto-Oncogene Proteins c-sis; D000077214:Becaplermin; C062968:lactide-caprolactone copolymer