title: Recombinant human bone morphogenetic protein-2 and collagen for bone regeneration.
abstract: The study reported describes a combination of recombinant human bone morphogenetic protein-2 (rhBMP-2) and collagen (C) to regenerate bone. Unilateral critical-sized defects (CSDs) were prepared in radii of 32 skeletally mature New Zealand white rabbits. Rabbits were divided evenly among four treatments: autograft, absorbable C (Helistat), 35 microg of rhBMP-2 combined with absorbable C (rhBMP-2/C), and untreated CSDs. The two euthanasia periods were 4 and 8 weeks. Radiographs were taken the day of surgery, every 2 weeks, and at term and the percent of radiopacity was measured. Data analysis revealed a time-dependent increase in the percent radiopacity with rhBMP-2/C. Histological examination revealed the rhBMP-2/C treatment regenerated osseous contour by 8 weeks. According to quantitative histomorphometry, the CSD and C groups had significantly less new bone than either autograft or rhBMP-2/C (p < or = 0.05). The results suggest that rhBMP-2/C could be an effective therapy to restore segmental bone defects.
authors.affiliation: Oregon Health Sciences University, Division of Plastic and Reconstructive Surgery, Portland 97201-3098, USA. hollinge@ohsu.edu
authors.forename: J O
authors.initials: JO
authors.lastname: Hollinger
authors.forename: J M
authors.initials: JM
authors.lastname: Schmitt
authors.forename: D C
authors.initials: DC
authors.lastname: Buck
authors.forename: R
authors.initials: R
authors.lastname: Shannon
authors.forename: S P
authors.initials: SP
authors.lastname: Joh
authors.forename: H D
authors.initials: HD
authors.lastname: Zegzula
authors.forename: J
authors.initials: J
authors.lastname: Wozney
mesh_terms: D000818:Animals; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000494:pharmacology*; D001861:Bone Regeneration / Q000187:drug effects*; D016025:Bone Transplantation / Q000502:physiology; D001842:Bone and Bones / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D016466:CHO Cells; D003094:Collagen / Q000494:pharmacology*; D006224:Cricetinae; D006801:Humans; D011817:Rabbits; D011859:Radiography; D011994:Recombinant Proteins / Q000494:pharmacology; D016212:Transforming Growth Factor beta
chemical_list: C525718:BMP2 protein, human; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; C499469:recombinant human bone morphogenetic protein-2; D003094:Collagen