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氟对甲状腺细胞凋亡的影响及其机制研究 被引量:5

Studies of fluoride on the thyroid cell apoptosis and mechanism
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摘要 目的探讨氟对人正常甲状腺细胞Nthy-ori3-1的毒性作用及机制。方法分别用0(对照)、0.1、1.0、3.0mmol/L的NaF作用于体外培养的Nthy,ori3-1细胞24h后,采用噻唑蓝染色法、乳酸脱氢酶(LDH)比色法检测存活率和LDH漏出率,采用流式细胞术检测活性氧(ROS)水平、细胞周期构成比及凋亡率。结果以对照组细胞存活率为100%,1.0、3.0mmol/LNaF组细胞存活率分别为(76.644-9.13)%、(64.04±6.32)%,与对照组存活率的差异有统计学意义(P值均〈0.01)。3.0mmol/LNaF组LDH漏出率及ROS水平分别为(48.664-7.15)%,(29993.50±1786.86),较对照组[分别为(35.24±3.02)%,(13021.334-1067.55)]升高(P值均〈0.01)。1.0mmol/LNaF组细胞G0/G1期、S期细胞百分比分别为(40.76±5.65)%、(54.054-4.59)%,与对照组[分别为(60.09±1.76)%、(32.594-2.43)%]相比,差异有统计学意义(P值均〈0.01)。3.0mmol/LNaF组细胞凋亡率为(20.09±3.22)%,高于对照组[(9.64±3.44)%],P〈0.01。结论试验浓度的氟能降低甲状腺细胞存活率,增加LDH漏出率和ROS产生,并使细胞发生S期阻滞及诱导细胞凋亡。 Objective To explore the toxic effect of fluoride on the human thyroid cells (Nthy-ori 3-1 ) and its mechanism. Methods Nthy-ori 3-1 cells were exposed to 0. 0,0. 1,1.0,3.0 mmol/L of sodium fluoride ( NaF ) in vitro. After 24 hours incubation, 3 ( 4, 5-Dimethylthiazol-z-yl )-3, 5-diphenyltetrazolium bromide(MTT) assay and lactate dehydrogenase (LDH) assay were used to measure cell viability and the LDH leakage rate. Reactive oxygen species ( ROS ) level, constituent ratio of the cell cycle, and apoptosis rate were measured by flow eytometry. Results Comparing to viability of control group (set as 100. 00% ) ,the cell viability of the 1.0,3.0 mmol/L fluoride-treated groups (76. 64 ± 9. 13)%, (64. 04 ±6. 32) % were significantly decreased ( all P values 〈 0. 01 ). LDH leakage rate and ROS level of the 3.0 mmol/L fluoride-treated group ( (48.66 ± 7. 15)% , (29 993.50 ± 1786.86) FI) were significantly increased ( all P values 〈 0. 01 ) compared to control group ( (35.24 ± 3.02 ) % , ( 13 021.33 ± 1067.55 ) FI). The G0/GI phase cells of the 1.0 mmol/L fluoride-treated group ( (40. 76 ± 5.65 ) % ) were lower than control group (60. 09 ± 1.76) % (P 〈 0. 01 ) ,yet the percentage of ceils in S phase ( (54. 05 ± 4. 59) % ) were higher than the control group ( 32.59 ± 2.43 ) % ( P 〈 0. 01 ). Comparing to control group ( ( 9.64 ± 3.44) % ) ,the precentage of apoptosis cells increased in the 3.0 mmol/L fluoride-treated group ( (20. 09 ± 3.22) % ) ( P 〈 0. 01 ). Conclusion To Nthy-ori 3-1 cells, fluoride under experimental concentrations decreases cell viability, improve the LDH leakage rate, and ROS level. It blocks the cells in S phase and induce cell apoptosis.
出处 《中华预防医学杂志》 CAS CSCD 北大核心 2012年第3期233-236,共4页 Chinese Journal of Preventive Medicine
基金 国家自然科学基金(30972555) 天津市医药卫生2010年度科技攻关项目(10KG215)
关键词 氟化物 甲状腺 细胞凋亡 氧化性应激 细胞周期 Fluorides Thyroid gland Apoptosis Oxidative stress Cell cycle
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