酪氨酸激酶/信号转导和转录激活子在氟中毒大鼠肝脏中表达  被引量:4

Expression of Janus kinase/signai transduction and transcriptional activation (JAK1 and STAT3) in liver offluorosis rats

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作  者:朱志坚[1] 于燕妮[1] 

机构地区:[1]贵州医科大学病理学教研室,贵阳550004

出  处:《中华地方病学杂志》2015年第10期733-738,共6页Chinese Journal of Endemiology

基  金:国家自然科学基金(81260419);教育部博士点基金(博导类,20125215110001)

摘  要:目的探讨酪氨酸激酶/信号转导和转录激活子(JAK/STAT)通路在慢性氟中毒大鼠肝脏损伤中的作用及机制。方法36只健康SD大鼠按体质量采用随机数字表法分为对照组(饮用含氟量〈1mg/L自来水),低、高过剂量氟组(饮水含氟量分别为5、50mg/L),每组12只(雌雄各半)。饲养6个月后,股动脉放血处死,采用氟离子选择电极法检测大鼠尿氟、骨氟含量;自动血生化分析仪检测大鼠肝功能;免疫组织化学和蛋白印迹(Westernblot)法检测JAK/STAT通路中酪氨酸蛋白激酶1(JAK1)、信号传导与转录激活因子3(STAT3)及凋亡因子B细胞淋巴瘤/白细胞-2(Bc1-2)、B细胞淋巴瘤/白细胞基因伴随蛋白X(Bax)蛋白表达水平;氧化应激试剂盒法检测肝组织中总超氧化物歧化酶(T-SOD)、谷胱甘肽过氧化物酶(GSH-PX)活性及脂质过氧化物(LPO)含量。结果低、高过剂量氟组大鼠尿氟[(1.90±0.12)、(2.20±0.17)mg/L]、骨氟[(210.37±15.81)、(222.84±10.21)mg/kg]均高于对照组[(1.74±0.11)mg/L,(165.48±10.37)mg/kg,F=33.840、69.149,P均〈0.05];高过剂量氟组大鼠血清谷氨酸转氨酶[ALT,(69.83±11.18)U/L]及天门冬氨酸氨基转移酶[AST,(167.56±50.85)U/L]活性均高于对照组[(42.67±7.07)、(126.31±16.76)U/L,F=32.135、4.984,P均〈0.05];高过剂量氟组JAKl、STAT3及Bax蛋白表达(1.56±0.31、1.49±0.49、1.41±0.55)明显高于对照组(1.01±0.11、1.04±0.15、0.87±0.21,F=10.923、5.361、5.009,P均〈0.05),高过剂量氟组Bcl.2蛋白表达(0.61±0.15)明显低于对照组(1.04±0.17,F=16.017,P〈0.05);高过剂量氟组T-SOD[(7.22±0.88)U/mgprot]、GSH-PX[(7.23±2.47)U/mgprot]活性明显低于对照组[(9.52±1.51)、(12.01±5.Objective To explore the role of Janus kinase/signal transduction and transcriptional activation (JAK/STAT) pathway in rat liver damaged by excessive fluorine. Methods Thirty-six healthy Sprague-Dawley (SD) rats were randomized by weight and divided into three groups (6 males and 6 females per group): a control group (drunk water containing NaF 〈 1 mg/L) and two fluorosis groups (drunk water containing NaF of 5 mg/L and 50 mg/ L). After 6 months of experiment treatment, the fluorine contents of urine and bone were detected by fluorine-ion electrode method. The rats liver function was determined by automatic blood chemical analyzer. The protein expression of Janus kinase (JAK1), signal transducer and activator of transcription (STAT3), B-cell lymphoma/ leukemia-2 (Bcl-2) and Bcl-associated x protein (Bax) were detected by immunohistochemistry (IHC) and protein imprinting (Western blotting). The activity of superoxide dismutase (SOD), glutathione peroxidase (GSH-PX) and the content of lipid peroxide (LPO) in liver tissue were determined with oxidative stress kit. Results The fluorine contents in the urine and bone in low- [(1.90 ± 0.12)mg/L, (210.37 ± 15.81)mg/kg[ and hi,h-dose [(2.20 ± 0.17)mg/L,(222.84± 10.21)mg/kg] fluoride groups were higher than those of control group [(1.74 ±0.11)mg/L; (165.48 ± 10.37) mg/kg, F = 33.840, 69.149, P 〈 0.05]; the activity of serum alanine aminotransferase (ALT) and aspartate transaminase (AST) in high-dose fluorosis group [(69.83 ± 11.18), (167.56± 50.85) U/L] was higher than those of control group [(42.67 ± 7.07), (126.31 ± 16.76)U/L, F = 32.135, 4.984, all P 〈 0.05]; the protein expression of JAK1, STAT3 and Bax (1.56 ±0.31, 1.49 ±0.49, 1.41 ± 0.55) in high-dose fluorosis group were significantly higher than those of control groulz(1.01 ± 0.11, 1.04 ± 0.15, 0.87± 0.21, F = 10.923, 5.361, 5.009, all P 〈 0.05), and Bcl-2 (0.61 ± 0.15) was

关 键 词:JAK/STAT信号通路 氟中毒  氧化性应激 

分 类 号:R599.1[医药卫生—内科学]

 

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