机构地区:[1]广西医科大学第一附属医院眼科,广西壮族自治区南宁市530021
出 处:《眼科新进展》2017年第10期906-910,共5页Recent Advances in Ophthalmology
基 金:国家自然科学基金资助(编号:81360146)~~
摘 要:目的探讨高钙培养对人晶状体上皮细胞(human lens epithelial cells,HLEC)株SRA01/04氧化应激水平的影响。方法选取处于对数生长期的HLEC均匀接种96孔板(每孔2×10~3个细胞),对照组:正常培养的HLEC,实验组:正常培养的HLEC+CaCl_2(3 mmol·L^(-1)、5 mmol·L^(-1)、7 mmol·L^(-1)、9 mmol·L^(-1)、11 mmol·L^(-1)、13 mmol·L^(-1)、15 mmol·L^(-1)、17 mmol·L^(-1)、19 mmol·L^(-1))培养0 h、12 h、24 h、36 h,采用CCK-8法检测各组细胞存活率。利用定量检测试剂盒测量细胞内超氧化物歧化酶(superoxide dismutase,SOD)、总谷胱甘肽(total-glutathione,T-GSH)含量及氧化型谷胱甘肽(oxidized glutathione,GSSG)/T-GSH比值的变化。结果 3 mmol·L^(-1)、5 mmol·L^(-1)、7 mmol·L^(-1)CaCl_2处理SRA01/04细胞24 h,细胞存活率随CaCl_2浓度增高先呈显著下降趋势,当浓度增高到9 mmol·L^(-1)后细胞存活率又逐渐恢复,各实验组HLEC活力差异有统计学意义(P<0.05)。对照组细胞活力(0.592±0.055)与15 mmol·L^(-1)CaCl_2组(0.293±0.020)细胞活力相比差异有统计学意义(t=7.811,P<0.05)。CaCl_2引起HLEC凋亡的最合适浓度和作用时间为15 mmol·L^(-1)处理24 h。与对照组相比,15 mmol·L^(-1)CaCl_2处理24 h后,细胞核碎裂、溶解,细胞内SOD活力增高(t=-6.417,P<0.05),T-GSH含量下降(t=13.816,P<0.05),GSSG/T-GSH比值增高(t=-4.396,P<0.05)。结论 CaCl_2诱导的高钙状态抑制HLEC的活力,引起细胞内SOD活力和GSSG含量增加,诱发并加剧细胞内氧化应激反应。Objective To investigate the influence of calcium elevation on oxida- tive stress in human lens epithelial cells (HLEC) SRA01/04. Methods The cells (2 x 10^8 cens/well) which in the period of logarithmic phase were seeded into 96-well plates with three replicates for the two groups;and in the experimental group, SRA01/04 cells were exposed to a CaC12 concentration gradient (3 nunol · L-1 ,5 mmol · L-1,7 mmol · L-1 ,9 mmol · L-1, 11 mmol · L-1, 13 mmol· L-1, 15 minol · L-1, 17 mmol · L-1, 19 mmol· L-1 ) for 0 h,12 h,24 h,36 h;while the cells in the control group were cultured in complete 1640 medium. Cell counting kit-8 (CCK-8) assay was used to measure cell viability. The levels of intracellular superoxide dismutase ( SOD ), glutathione ( GSH ) content and oxidized glutathione (GSSG) / total glutathione (T-GSH) were determined by using the microplate-reader method with the commercial total/oxidized glutathione and sod quantification kit. Results At fLrst,the survival rate of SRA01/04 ceUs treated with 3 mmol · L-1 ,5 mmol · L-· ,7 mmol · L-1 CaC12 for 24 h showed a significant de- crease with the increase of CaC12 concentration by CCK-8 assays, but gradually in- creased when the concentration increased to 9 mmol · L-1, and the difference ap- proached statistical significance (P 〈 0.05 ). Meanwhile, there was significant difference in the viability of the control group (0.592 ± 0.055 ) and cells exposed to 15 mmol · L - CaC12 (0.293 ± 0.02 ) ( t = 7.811 ,P 〈 0.05 ). Cell treatment with 15 mmol · L-1 CaCl: for 24 h was the most appropriate condition for HLEC apoptosis, followed by the appear- ance of nuclear fragmentation and dissolution, enhanced intracellular SOD viability ( t = - 6.417 ,P 〈 0.05 ), decreased T-GSH content( t = 13. 816 ,P 〈 0.05 ), and increased ratio of GSSG/T-GSH ( t = - 4.396 ,P 〈 0.05 ) when compared with the control group, and the differences were statistically significant. Conclusion Intracellular calc
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