title: Preparation and ectopic osteogenesis in vivo of scaffold based on mineralized recombinant human-like collagen loaded with synthetic BMP-2-derived peptide.
abstract: The ideal bone graft material must be biocompatible, biodegradable, osteoconductive and osteoinductive. In this study, a new biomimetic scaffold based on mineralized recombinant collagen, nano-hydroxyapatite/recombinant human-like collagen/poly(lactic acid) (nHA/RHLC/PLA), was prepared and the synthetic P24 peptide derived from BMP-2 was introduced into the porous nHA/RHLC/PLA scaffold to improve its osteoinductive property. The nHA/RHLC/PLA implants loaded with 3 mg, 2 mg, 1 mg and 0 mg P24 peptide were implanted subcutaneously into rats. At the 4th, 8th and 12th weeks after implantation, the rats were sacrificed in batch and the samples were harvested. Their osteogenic capability was detected by CT scan and histological observation. The results indicated that the osteogenic capability of 3 mg, 2 mg and 1 mg of the P24 peptide was superior to the implants without the P24 peptide. There was no significant difference between implants with 3 mg and 2 mg P24 peptide, but the osteogenic capability of the two dosage groups was significantly better than that of the 1 mg group. It was concluded that BMP-2-derived peptide can increase the osteoinduction of nHA/RHLC/PLA scaffold and the P24 peptide induced new bone formation in a dose-dependent manner. The nHA/RHLC/PLA scaffold loaded with the synthetic BMP-2-derived peptide is a kind of ideal scaffold material for bone tissue engineering.
authors.affiliation: Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China. gxdwh@yahoo.com.cn
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.forename: Qixin
authors.initials: Q
authors.lastname: Zheng
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Guo
authors.forename: Yongchao
authors.initials: Y
authors.lastname: Wu
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Fuzai
authors.initials: F
authors.lastname: Cui
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D055396:Bone Morphogenetic Protein 2 / Q000378:metabolism / Q000502:physiology*; D016025:Bone Transplantation; D001842:Bone and Bones / Q000378:metabolism; D003094:Collagen / Q000737:chemistry*; D006801:Humans; D019344:Lactic Acid / Q000737:chemistry; D008297:Male; D010012:Osteogenesis; D010455:Peptides / Q000737:chemistry; D011091:Polyesters; D011108:Polymers / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D011994:Recombinant Proteins / Q000737:chemistry; D023822:Tissue Engineering / Q000379:methods
chemical_list: D001672:Biocompatible Materials; D055396:Bone Morphogenetic Protein 2; D010455:Peptides; D011091:Polyesters; D011108:Polymers; D011994:Recombinant Proteins; D019344:Lactic Acid; C033616:poly(lactide); D003094:Collagen