肌醇酶1信号通路对氟诱导的成骨细胞分化的影响  被引量:2

Effect of inositol-requiring enzyme-1 signaling pathway on the differentiation of osteoblasts induced by fluoride

在线阅读下载全文

作  者:李希宁[1] 三旗春 张婷[1] 高喜仁[1] 俞峰[1] 孙波[2] 

机构地区:[1]浙江湖州师范学院医学院病理学教研室,湖州313000 [2]吉林大学药学院药理学教研室,长春130021

出  处:《中华地方病学杂志》2016年第12期863-868,共6页Chinese Journal of Endemiology

摘  要:目的观察染氟成骨细胞未折叠蛋白反应肌醇酶1(IRE1)-Xbp1信号通路的表达及siRNA干扰抑制IRE1表达后成骨细胞内成骨细胞标志物的变化趋势。方法细胞增殖毒性(CCK-8)实验检测成骨细胞MC3T3-E1增殖活性,设置0.0、0.1、1.0、2.0、4.0、8.0、16.0、20.0、32.0、64.0mg/L10个不同氟含量组;选取具有代表性的低、中、高剂量氟(含量分别为2.0、8.0、20.0mg/L)作用于MC3T3-E1细胞2d,采用实时荧光定量PCR(Real-timePCR)检测MC3T3-E1细胞中未折叠蛋白反应相关基因和成骨细胞标志物[碱性磷酸酶(ALP)、骨钙素(OCN)、Runx2、osterix、免疫球蛋白重链结合蛋白(Bip)、蛋白激酶R样内质网激酶(PERK)、活化转录因子6(ATE6)、Xbp1]的表达:IRE1siRNA转染MC3T3-E1细胞并联合染氟,Real-timePCR和蛋白免疫印迹法检测MC3T3-E1细胞中IRE1信号通路和成骨细胞标志物的表达。结果CCK-8检测结果显示氟的双向效应,即与0.0mg/L组[1.00±0.01(1d)、1.00±0.02(3d)、1.00±0.08(7d)]比较,成骨细胞活性在2.0mg/L染氟组[1.11±0.02(1d)、1.29±0.02(3d)]、8.0mg/L染氟组[1.16±0.02(1d)、1.44±0.03(3d)]显著增强(P均〈0.05),而2(1.0mg/L染氟组却抑制细胞活性[0.83±0.01(1d)、0.81±0.01(3d)、0.96±0.04(7d),P均〈0.05]。2.0mg/L染氟组显著诱导MC3T3-E1细胞内ALP(12.80±3.62)、Runx2(6.61±0.48)和osterix(21.42±1.56)的表达,与0.0mg/L组(6.86±2.13、2.65±0.38、12.48±3.96)比较,差异有统计学意义(P均〈0.05),而20.0mg/L染氟组抑制ALP(0.88±0.17)、OCN(0.16±0.05)和osterix(1.35±0.51)的表达,与0.0mg/L组[4.58±1.52(OCN)]比较,差异均有统计学意义(P均〈0.05)。与0.0mg/L组[1.36±0.58(IRE1)、0.96±0.45(Xbp1�Objective To observe the expression of the unfolded protein response especially the inositol- requiring enzyme-1 (IRE1)-Xbp1 signaling pathway, and the change trend of osteogenic markers after inhibition of IRE1 expression through siRNA interference in osteoblasts exposed to fluoride. Methods Proliferation activity ofMC3T3-E1 cells was detected by CCK-8 assay, and 0.0, 0.1, 1.0, 2.0, 8.0, 16.0, 20.0, 32.0, 64.0 mg/L groups were set up. Then representative doses of low, medium and high fluoride (2.0, 8.0, 20.0 mg/L) were selected to treat MC3T3-E1 cells and the expression of the unfolded protein response related genes and osteogenic markers [alkaline phosphatase (ALP), osteocalcin (OCN), Runx2, osterix, binding immunoglobulin protein (Bip), protein kinase-like endoplasmin reticulum kinase (PERK), activated transcription factor 6 (ATF6), Xbp1] was detected by Real-time PCR. MC3T3-E1 cells were transfected with IRE1 siRNA and then exposed to fluoride, and the expression of IRE1 signaling pathway and osteogenic markers was detected by Western blotting and real-time PCR. Results CCK-8 results showed the bidirectional effect of fluoride on the activity of osteoblasts. Compared with the 0.0 mg/L group [1.00 ± 0.01 (d 1), 1.00 ± 0.02 (d 3), 1.00 ± 0.08 (d 7)], the osteoblast activity was significantly enhanced at 2.0 mg/L [1.11 ± 0.02 (d 1), 1.29 ± 0.02 (d 3)], 8.0 mg/L [1.16 ± 0.02 (d 1), 1.44 ± 0.03 (d 3), all P〈 0.05], while 20.0 mg/L inhibited cell activity [0.83 ± 0.01 (d 1), 0.81 ± 0.01 (d 3), 0.96 ± 0.04 (d 7), all P 〈 0.05]. Compared with the 0.0 mg/L group [6.86 ± 2.13 (ALP), 4.58 ± 1.52 (OCN), 2.65 ± 0.38 (Runx2), 12.48 ± 3.96 (osterix)], 2.0 mg/L significantly induced the expression of intracellular ALP (12.80 ± 3.62), Runx2 (6.61 ± 0.48) and osterix (21.42 ± 1.56), and the differences were statistically significant (all P 〈 0.05), while 20.0 mg/L inhibited the expression of ALP (0.88 ±

关 键 词:氟骨症 未折叠蛋白反应 肌醇酶1 基因干扰 成骨细胞 

分 类 号:R599.1[医药卫生—内科学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象