title: [Preparation of a biphasic calcined bone of beta-TCP/HAP and its application in BMP-2 gene medicine].
abstract: In this study, we produced a biphasic absorbable calcined bone (CB) of beta-TCP/HAP, and evaluated its function as a carrier of bone marrow derived mesenchymal stem cells(BMSCs) in BMP-2 gene medicine. Biphasic CB was manufactured and its surface was coated by collagen. X-ray diffraction analysis, scanning electron microscopy and biomechanical measurement were performed on the product. Heterotopic bone induction of product as carrier of BMP-2 gene transferred BMSCs and its biodegradability were tested in nude mice and goats. X-ray diffraction analysis showed biphasic patterns of HAP and beta-TCP. Scanning electron microscopy showed the porosity were similar to those of the cancellous bone, and the adhesion of cells on the CB surface were better after surface-coating with collagen. It had certain biomechanical strength and appropriate biodegradability. Biphasic CB loaded with Adv-hBMP-2 transduced BMSCs could induce much bony callus at the subcutaneous site of nude mice and the tibial bone defects of goats. The results showed biphasic CB is a superior carrier of cells in BMP-2 gene medicine.
authors.affiliation: Department of Orthopaedics, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011.
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Xu
authors.forename: Tingting
authors.initials: T
authors.lastname: Tang
authors.forename: Jueren
authors.initials: J
authors.lastname: Lou
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Yu
authors.forename: Kerong
authors.initials: K
authors.lastname: Dai
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000235:genetics*; D001861:Bone Regeneration / Q000187:drug effects; D018786:Bone Substitutes / Q000737:chemistry / Q000494:pharmacology; D002130:Calcium Phosphates / Q000494:pharmacology; D002454:Cell Differentiation; D006041:Goats; D006882:Hydroxyapatites / Q000494:pharmacology; D008422:Materials Testing; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D051379:Mice; D008819:Mice, Nude; D014162:Transfection; D016212:Transforming Growth Factor beta
chemical_list: C525719:Bmp2 protein, mouse; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D018786:Bone Substitutes; D002130:Calcium Phosphates; D006882:Hydroxyapatites; D016212:Transforming Growth Factor beta