title: Expression of core binding factor 1 and osteoblastic markers in C2C12 cells induced by calcium phosphate ceramics in vitro.
abstract: The in vivo osteoinductive capacity of porous calcium phosphate ceramics (Ca/P ceramics) with special structure and phase composition had been found for almost decades. The mechanism of the osteoinductivity of porous calcium phosphate is studied by C2C12 cells culture in this paper. C2C12 cells were cocultured with four kinds of porous Ca/P ceramics for 2 and 5 days, without adding other growth factors. The four kinds of Ca/P ceramics were pure HA sintered at 1250 degrees C and HA/TCP with a ratio of 60/40 sintered at 1100, 1200, and 1250 degrees C respectively. RT-PCR analysis found that the Ca/P ceramics induced the expression of Cbfa1, collagen type I, bone sialoprotein, and osteocalcin in C2C12 cells, while they did not induce mRNA expression of Indian hedgehog (IHH) that regulate chondrocyte differentiation. Our results showed that Ca/P ceramics alone were sufficient to induce C2C12 cells differentiation. The induction of bone-related markers expression by Ca/P ceramics in osteoprogenitor cells suggested that the osteogenesis induced by the ceramics was intramembranous and the osteoinductivity was their intrinsic property.
authors.affiliation: Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
authors.forename: Yanfei
authors.initials: Y
authors.lastname: Tan
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Hongsong
authors.initials: H
authors.lastname: Fan
authors.forename: Xinlong
authors.initials: X
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Lu
authors.forename: Xingdong
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000818:Animals; D001483:Base Sequence; D001672:Biocompatible Materials; D015415:Biomarkers / Q000378:metabolism; D002130:Calcium Phosphates; D002460:Cell Line; D049109:Cell Proliferation; D002470:Cell Survival; D002516:Ceramics; D024042:Collagen Type I / Q000235:genetics; D050659:Core Binding Factor Alpha 1 Subunit / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D015870:Gene Expression; D066298:In Vitro Techniques; D058574:Integrin-Binding Sialoprotein; D008422:Materials Testing; D051379:Mice; D008855:Microscopy, Electron, Scanning; D010006:Osteoblasts / Q000166:cytology / Q000378:metabolism*; D015675:Osteocalcin / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012795:Sialoglycoproteins / Q000235:genetics
chemical_list: D001672:Biocompatible Materials; D015415:Biomarkers; D002130:Calcium Phosphates; D024042:Collagen Type I; D050659:Core Binding Factor Alpha 1 Subunit; D017931:DNA Primers; C546872:Ibsp protein, mouse; D058574:Integrin-Binding Sialoprotein; D012333:RNA, Messenger; D012795:Sialoglycoproteins; D015675:Osteocalcin; C020243:calcium phosphate