Abstract
Bone morphogenetic proteins (BMPs) play an important role in regulating osteoblast differentiation and subsequent bone formation, mainly evidenced by the induced osteogenic ability of BMP-2 from BMPs. However, BMP-2 alone does not induce the expected efficacy due to its short retention in vivo. In this study, a novel BMP-2-related peptide (designated P24) derived from the “knuckle epitope” of BMP-2 was coupled covalently to type I collagen derived from rat tail and observed under scanning electron microscopy (SEM) in low vacuum mode. The BMP-2-related peptide/collagen composite was implanted in vivo into the pocket of the quadriceps musculature of Sprague-Dawley (SD) rats and then harvested 3 or 6 weeks after surgery. It was found that lyophilized collagen retained a porous network structure with an average inner-diameter of 90 ∼ 160 μm. Based on radiographic evaluation and histological examination, BMP-2-related peptide/collagen induced significant ectopic bone formation compared to that of rat tail collagen alone as a control. Our results indicate collagen served as a good carrier for newly synthesized BMP-2-related peptide and that the BMP-2-related peptide/collagen composite was an effective substitute in bone tissue engineering.
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Li, JF., Lin, ZY., Zheng, QX. et al. Bone formation in ectopic and osteogenic tissue induced by a novel BMP-2-related peptide combined with rat tail collagen. Biotechnol Bioproc E 15, 725–732 (2010). https://doi.org/10.1007/s12257-009-3130-0
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DOI: https://doi.org/10.1007/s12257-009-3130-0