title: TAK-778 enhances osteoblast differentiation of human bone marrow cells.
abstract: TAK-778 has been shown to induce bone growth in in vitro and in vivo models. However, there are no studies evaluating the effect of TAK-778 on human cells. Thus, the aim of this study was to investigate osteogenesis induced by TAK-778 on human bone marrow cells. Cells were cultured in 24-well culture plates at a cell density of 2 x 10(4) cells/well in culture medium containing TAK-778 (10(-7), 10(-6), and 10(-5) M, each) or vehicle. During the culture period, cells were incubated at 37 degrees C in a humidified atmosphere of 5% CO(2) and 95% air. For attachment evaluation, cells were cultured for 4 and 24 h. After 7, 14, and 21 days, cell proliferation, cell viability, total protein content, alkaline phosphatase (ALP) activity, and bone-like formation were evaluated. Data were compared by ANOVA and Duncan's multiple range test. TAK-778 did not affect cell attachment and viability. Cell number was reduced by TAK-778 in all time period evaluated in a dose-dependent way. The effect of TAK-778 on total protein content, ALP activity and bone-like formation was a dose-dependent increase. The present results suggest that initial cell events such as cell attachment are not affected by TAK-778 while events that indicate osteoblast differentiation including reduced cell proliferation, and increased both ALP activity and bone-like formation are enhanced by TAK-778 in a time and dose-dependent way. It means that TAK-778 could be a useful drug to enhance new bone formation in clinical situations that require rapid restoration of physiologic function, such as orthopedic and maxillofacial surgery.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Brazil. adalrosa@forp.usp.br
authors.forename: Adalberto L
authors.initials: AL
authors.lastname: Rosa
authors.forename: Marcio M
authors.initials: MM
authors.lastname: Beloti
mesh_terms: D000293:Adolescent; D000328:Adult; D000469:Alkaline Phosphatase / Q000187:drug effects; D001582:Benzothiepins / Q000494:pharmacology*; D001854:Bone Marrow Cells / Q000166:cytology / Q000187:drug effects; D002448:Cell Adhesion / Q000187:drug effects; D002452:Cell Count; D002454:Cell Differentiation / Q000187:drug effects*; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008297:Male; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects*; D010012:Osteogenesis / Q000187:drug effects; D011506:Proteins / Q000032:analysis / Q000187:drug effects; D013997:Time Factors
chemical_list: D001582:Benzothiepins; D011506:Proteins; C120450:TAK 778; D000469:Alkaline Phosphatase