不同剂量重组人骨形态发生蛋白2对人成骨肉瘤细胞系SaOS-2成骨活性的影响

目的 探讨不同剂量的重组人骨形态发生蛋白2(rhBMP-2)对人成骨肉瘤细胞系SaOS-2成骨活性的影响.方法 将体外培养的SaOS-2细胞分别暴露于0(对照)、2、20、200μg/L的rhBMP-2中,培养12、24、48 h后,以实时荧光定量PCR方法测定SaOS-2细胞碱性磷酸酶(ALP)和骨钙素(BGP)mRNA的表达水平.结果 SaOS-2细胞ALP和BGP mRNA表达量随rhBMP-2刺激剂量的增加呈上升趋势.20μg/L rhBMP-2作用48 h(1.60±0.64)和200 μg/L rhBMP-2作用12、48 h(1.70±0.41、1.80 ±0.19)SaOS-2细胞ALP mRNA 相对表达量较同一时间段对照组(12、48 h分别为0.80±0.25、0.74±0.21)明显升高(P均<0.05).2μg/LrhBMP-2作用24 h(1.67±0.33)、20μg/L rhBMP-2作用12、24 h(2.42±0.13、1.82±0.14)和200 μg/L rhBMP-2作用12、24 h(1.46±0.11、1.24 ±0.07)SaOS-2细胞BGP mRNA相对表达量较同一时间段对照组(12、24 h分别为1.01±0.14、0.84±0.12)明显升高(P均<0.05).结论 rhBMP-2能明显刺激SaOS-2细胞ALP、BGP mRNA表达升高,并呈现剂量一效应关系,但表现的剂量特征不同.

Abstract：

Objective To investigate the effect of recombinant human bone morphogenetic protein 2 (rhBMP-2) on the osteogenic activities of human osteosarcoma cell line SaOS-2. Methods SaOS-2 cells were exposed to rhBMP-2 for 12,24,48 h at 0(control) ,2,20,200 μg/L, respectively. The mRNA expression of alkaline phosphatase(ALP) and bone gla(BCP) were detected by real time polymerase chain reaction. Results The mRNA expression of ALP and BGP of SaOS-2 cells increased gradually with rhBMP-2. The mRNA expression of ALP of the 20 μg/L group exposed for 48 h(1.60 ± 0.64), and the 200 μg/L group exposed for 12,48 h(1.70 ± 0.41, 1.80±0.19) were significantly higher than those of control (12 h: 0.80±0.25, 48 h: 0.74±0.21, allP<0.05). The mRNA expression of BGP of the 2 μg/L group exposed for 24 h(1.67 ± 0.33), the 20 μg/L group exposed for 12,24 h(2.42 ± 0.13,1.82 ± 0.14) and the 200 μg/L group exposed for 12,24 h(1.46 ± 0.11,1.24 ± 0.07) were significantly higher than those of control( 12 h: 1.01 ± 0.14, 24 h: 0.84 ± 0.12, all P< 0.05). Conclusions rhBMP-2 can promote the mRNA expression of ALP and BGP of SaOS-2 cells. They have a dose-response relationship, but represent a different dose-response effect.

Effect of different doses of recombinant human bone morphogenetic protein 2 on osteogenic activities of human osteosarcoma cell line SaOS-2

Objective To investigate the effect of recombinant human bone morphogenetic protein 2 (rhBMP-2) on the osteogenic activities of human osteosarcoma cell line SaOS-2. Methods SaOS-2 cells were exposed to rhBMP-2 for 12,24,48 h at 0(control) ,2,20,200 μg/L, respectively. The mRNA expression of alkaline phosphatase(ALP) and bone gla(BCP) were detected by real time polymerase chain reaction. Results The mRNA expression of ALP and BGP of SaOS-2 cells increased gradually with rhBMP-2. The mRNA expression of ALP of the 20 μg/L group exposed for 48 h(1.60 ± 0.64), and the 200 μg/L group exposed for 12,48 h(1.70 ± 0.41, 1.80±0.19) were significantly higher than those of control (12 h: 0.80±0.25, 48 h: 0.74±0.21, allP<0.05). The mRNA expression of BGP of the 2 μg/L group exposed for 24 h(1.67 ± 0.33), the 20 μg/L group exposed for 12,24 h(2.42 ± 0.13,1.82 ± 0.14) and the 200 μg/L group exposed for 12,24 h(1.46 ± 0.11,1.24 ± 0.07) were significantly higher than those of control( 12 h: 1.01 ± 0.14, 24 h: 0.84 ± 0.12, all P< 0.05). Conclusions rhBMP-2 can promote the mRNA expression of ALP and BGP of SaOS-2 cells. They have a dose-response relationship, but represent a different dose-response effect.