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染氟小鼠成骨细胞系MC3T3-E1细胞中还原型谷胱甘肽和氧化型谷胱甘肽观察

Level of reduced glutathione and oxidized glutathione in a mouse bone cell line MC3T3-E1 cells exposed to fluoride
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摘要 目的观察染氟小鼠成骨细胞系MC3T3-E1细胞中还原型谷胱甘肽(GSH)和氧化型谷胱甘肽(GSSG)的水平。方法采用噻唑蓝(MTT)法检测不同染氟条件下[F-剂量分别为0(对照)、0.5、1.0、2.0、4.0、8.O、12.O、20.0mg/L]MC3T3-E1细胞1、2、4、10d的细胞活性。另外,按染氟剂量,将MC3T3一E1细胞分为O(对照)、2、8、20mg/L组,分别染氟2、4、10d,采用高效液相色谱-串联四极杆质谱技术检测细胞内GSH、GSSG和谷氨酰胺(Gin)水平。结果染氟1d时2.0mg/L组细胞活性(O.57±0.05)明显高于对照组(0.49±0.03.P〈0.01);染氟4d时8.0、12.0mg/L组细胞活性(0.49±0.07、0.47±0.09)明显低于对照组(0.63±0.06,P〈0.05或〈0.01);染氟10d时8.0mg/L组细胞活性(1.52±0.29)明显高于对照组(0.86±0.23),而20.0mg/L组细胞活性(0.54±0.07)明显低于对照组(P均〈0.01)。染氟2、10d时20mg/L组细胞中GSH水平[(13.92±4.63)、(0.53±0.30)μmol/L]明显低于相应的对照组[(26.42±3.67)、(24.85±5.68)μmol/L,P均〈0.01]。染氟2d时2mg/L组、染氟4d时8mg/L组、染氟10d时8mg/L组细胞内GSSG水平[(1.12±0.62)、(2.13±0.62)、(2.97±1.30)μmol/L]明显高于相应的对照组[(0.55±0.22)、(1.46±0.46)、(1.35±0.50)μmol/L,P〈0.05或〈0.01]。染氟4d时2mg/L组和染氟10d时8、20ms/L组细胞内Gin水平[(62.80±17.41)、(122.26±19.51)、(19.38±8.11)μmol/L]明显低于相应的对照组[(83.28±14.32)、(147.154-16.95)μmol/L,P均〈0.05或〈0.01]。结论染氟能明显改变成骨细胞内的GSH、GSSG和Gln水平,从而影响细胞内氧化还原平衡态。 Objective To observe the level of reduced glutathione(GSH) and oxidized glutathione(GSSG) in a mouse bone cell line MC3T3-E1 cells exposed to fluoride. Methods MTT method was used to detect cell viability of MC3T3-E1 cells exposed to varying concentrations and periods of fluoride [ F- concentration: 0 (control), 0.5, 1.0, 2.0, 4.0, 8.0, 12.0, 20.0 mg/L; F- periods: 1, 2, 4 and 10 days]. The Xevo TQ MS was employed to test the levels of GSH, GSSG and glutamine (Gln). Results The MC3T3-E1 cell viability was significantly higher in the 2 mg/L group(0.57 ± 0.05) 1 day after the exposure compared to the respective control(0.49 ± 0.03, P 〈 0.01); conversely, cell viability was markedly lower in the 8 mg/L(0.49 ± 0.07) and 12 mg/L(0.47 ± 0.09) groups 4 days after the exposure in comparison to the control(0.63 ± 0.06, P 〈 0.05 or P 〈 0.01). The cell viability in the 8 mg/L group(1.52 ± 0.29) 10 days after the exposure was significantly higher than that in the control group (0.86 ± 0.23, P 〈 0.01), however, the value in the 20.0 mg/L group(0.54 ± 0.07) was significandy lower(P 〈 0.01 ). The level of cell GSH decreased significantly in the 20 mg/L groups 2 days [ (13.92 ± 4.63)μmol,/L ] and 10 days[(0.53 ± 0.30)μmol/L] after exposure compared to the respective controls[(26.42 ± 3.67), ( 24.85 ± 5.68.) μmol/L, all P 〈 0.01 ]. The level of cell GSSG markedly increased in the 2 mg/L group 2 days [ (1.12 ± 0.62)μmol/L ] and the 8 mg/L group 4 days [ (2.13 ± 0.62) μmol/L] after exposure compared to the controls [ (0.55 ± 0.22), (1.46 ± 0.46)μmol/L, all P 〈 0.05]. The similar change was observed in the 8 mg/L group[ (2.97 ± 1.30) μmol/L] 10 days after exposure compared to the control [(1.35 ± 0.50)μmol/L, P 〈 0.05]. The level of Gln decreased significantly in the 2 mg/L group[ (62.80 ± 17.41 )μmol/L] 4 days and in the 8 and 20 mg/L groups 10 days[ (122.26 ± 19.51), (1938 ± 8.11)μmol/L] after exposure compared to the controls[ (83.28 ± 14.32), (147.15 ± 16.95) μmol./L , all P 〈 0.05 or P 〈 0.01 ]. Conclusions Fluoride exposure can significantly promote the changes of GSH, GSSG and Gin levels in the osteoblast, thus affecting the intracellular redox equilibrium.
出处 《中国地方病学杂志》 CAS CSCD 北大核心 2012年第5期511-514,共4页 Chinese Jouranl of Endemiology
基金 国家自然科学基金(81072249)
关键词 氟化物 氟骨症 谷胱甘肽 Fluorides Osteofluorosis Glutathione
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