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Effects of sodium fluoride treatment in vitro on cell proliferation, apoptosis and caspase-3 and caspase-9 mRNA expression by neonatal rat osteoblasts

机译:体外氟化钠处理对新生大鼠成骨细胞增殖,凋亡及caspase-3和caspase-9 mRNA表达的影响

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摘要

Long-term excessive fluoride intake is linked to skeletal disease. Skeletal health is influenced by the balance between bone formation and resorption of which osteoblast function is critical. The objectives of this study were to determine the effect of fluoride treatment on osteoblast proliferation, apoptosis and caspase-3 and caspase-9 mRNA expression in vitro. Neonatal rat osteoblasts were cultured in the presence of varying concentrations (0.5–30 mg/l) of sodium fluoride and effects of treatments were determined. Treatment with sodium fluoride inhibited osteoblast proliferation in a dose-dependent fashion and effects were maximal after 120 h incubation. A significant increase in osteoblast apoptosis was observed (after 24 and 72-h treatment) in response to the lowest dose of sodium fluoride (0.5 mg/l) and osteoblast apoptosis was further increased in response to higher doses. Increased-osteoblast caspase-3 and caspase-9 mRNA was also observed in response to sodium fluoride treatment (5 mg/l) for 72 h. Results indicate that negative effects of excess fluoride on skeletal health may be mediated in part by inhibition of osteoblast survival.
机译:长期过量摄入氟化物与骨骼疾病有关。骨骼健康受到骨骼形成和吸收之间平衡的影响,而成骨细胞的功能至关重要。这项研究的目的是确定氟化物处理对体外成骨细胞增殖,凋亡以及caspase-3和caspase-9 mRNA表达的影响。在不同浓度(0.5-30 mg / l)的氟化钠存在下培养新生大鼠成骨细胞,并确定治疗效果。氟化钠处理以成剂量依赖性的方式抑制成骨细胞增殖,并且在孵育120小时后效果最大。响应最低剂量的氟化钠(0.5 mg / l),观察到了成骨细胞凋亡的显着增加(在处理24和72小时后),响应更高的剂量,成骨细胞的凋亡进一步增加。在氟化钠处理(5 mg / l)72小时后,还观察到成骨细胞caspase-3和caspase-9 mRNA的增加。结果表明,过量氟化物对骨骼健康的负面影响可能部分通过抑制成骨细胞存活来介导。

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