Information regarding antioxidant enzymes in amphioxus remains lacking, and this study was carried out to examine the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in differ...Information regarding antioxidant enzymes in amphioxus remains lacking, and this study was carried out to examine the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in different genders and tissues of amphioxus Branchiostoma belcheri tsingtauense. Results show that (1) CuZn-SOD, CAT and GPX activities in the whole amphioxus B. belcheri tsing- tauense were basically at the same levels in male and female amphioxus, whereas both T-SOD and Mn-SOD activities in male amphioxus were significantly higher than that in the female (P<0.05); (2) The testis had significantly higher T-SOD and CuZn-SOD activities than the ovary (P<0.05); (3) CuZn-SOD activity was undetectable in the guts of male and female amphioxus; (4) For both male and female am- phioxus, the activities of CAT and GPX in the gonads including testis and ovary were the lowest (P<0.05) among the tissues examined; (5) The gut and gill had the same level GPX activities while the gut had a higher CAT activity; (6) There was no clear difference in CAT and GPX activities in the corresponding tissues between male and female amphioxus. The study on SOD, CAT and GPX activities in different genders and tissues of the protochordate provides data for future comparison of amphioxus antioxidant enzymes with those of invertebrates and vertebrates.展开更多
目的:研究木瓜总三萜对非甾体抗炎药(NSAIDs)诱导小肠损伤模型大鼠内源性超氧化物歧化酶/谷胱甘肽过氧化物酶1/过氧化氢酶(SOD/GPX1/CAT)抗氧化系统、细胞外信号调节激酶/核因子2相关因子2/血红素氧合酶-1(ERK/Nrf2/HO-1)和线粒体凋亡...目的:研究木瓜总三萜对非甾体抗炎药(NSAIDs)诱导小肠损伤模型大鼠内源性超氧化物歧化酶/谷胱甘肽过氧化物酶1/过氧化氢酶(SOD/GPX1/CAT)抗氧化系统、细胞外信号调节激酶/核因子2相关因子2/血红素氧合酶-1(ERK/Nrf2/HO-1)和线粒体凋亡信号通路的影响。方法:实验大鼠随机分为正常组、模型组、木瓜总三萜(25、50和100mg/kg)组和雷贝拉唑肠溶片100mg/kg组,各组大鼠灌胃给予相应的药物,每天1次,连续1周,末次给药后禁食,次日再次给药1次; 1小时后,除正常组外,其余各组灌胃给予吲哚美辛45mg/kg 1次。24小时后取血,进行血液中SOD、GSH-Px、CAT和MPO、MDA水平检测;取小肠组织进行溃疡指数和组织形态学分析;实时定量PCR检测小肠组织中SOD1、SOD2、SOD3、GPX1、CAT、Bcl-2、Bax、Caspase-3、Caspase-9基因表达; Western blot检测小肠组织中ERK1/2、p-ERK1/2、胞浆Nrf2、胞核Nrf2、Bcl-2和Bax蛋白表达。结果:木瓜总三萜(25、50和100mg/kg)可显著降低吲哚美辛诱导小肠黏膜损伤大鼠小肠溃疡指数、病理学评分,改善小肠黏膜溃疡、黏膜及黏膜下层肿胀和炎性浸润,显著升高血液中内源性抗氧化酶活性,显著上调受损小肠组织中SOD1、SOD2、SOD3、GPX1、CAT和p-ERK1/2、胞核Nrf2、HO-1、Bcl-2表达,显著下调Bax和Caspase-3、Caspase-9表达,且随着剂量的增加,其作用效果更明显。结论:木瓜总三萜对NSAIDs诱导大鼠小肠损伤具有较好的保护作用,调节内源性SOD/GPX1/CAT抗氧化系统功能及ERK/Nrf2/HO-1和线粒体凋亡信号通路可能是其作用机制之一。展开更多
基金Supported by the Ministry of Science and Technology (MOST) of China (No.2006CB101805).
文摘Information regarding antioxidant enzymes in amphioxus remains lacking, and this study was carried out to examine the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in different genders and tissues of amphioxus Branchiostoma belcheri tsingtauense. Results show that (1) CuZn-SOD, CAT and GPX activities in the whole amphioxus B. belcheri tsing- tauense were basically at the same levels in male and female amphioxus, whereas both T-SOD and Mn-SOD activities in male amphioxus were significantly higher than that in the female (P<0.05); (2) The testis had significantly higher T-SOD and CuZn-SOD activities than the ovary (P<0.05); (3) CuZn-SOD activity was undetectable in the guts of male and female amphioxus; (4) For both male and female am- phioxus, the activities of CAT and GPX in the gonads including testis and ovary were the lowest (P<0.05) among the tissues examined; (5) The gut and gill had the same level GPX activities while the gut had a higher CAT activity; (6) There was no clear difference in CAT and GPX activities in the corresponding tissues between male and female amphioxus. The study on SOD, CAT and GPX activities in different genders and tissues of the protochordate provides data for future comparison of amphioxus antioxidant enzymes with those of invertebrates and vertebrates.
文摘目的:研究木瓜总三萜对非甾体抗炎药(NSAIDs)诱导小肠损伤模型大鼠内源性超氧化物歧化酶/谷胱甘肽过氧化物酶1/过氧化氢酶(SOD/GPX1/CAT)抗氧化系统、细胞外信号调节激酶/核因子2相关因子2/血红素氧合酶-1(ERK/Nrf2/HO-1)和线粒体凋亡信号通路的影响。方法:实验大鼠随机分为正常组、模型组、木瓜总三萜(25、50和100mg/kg)组和雷贝拉唑肠溶片100mg/kg组,各组大鼠灌胃给予相应的药物,每天1次,连续1周,末次给药后禁食,次日再次给药1次; 1小时后,除正常组外,其余各组灌胃给予吲哚美辛45mg/kg 1次。24小时后取血,进行血液中SOD、GSH-Px、CAT和MPO、MDA水平检测;取小肠组织进行溃疡指数和组织形态学分析;实时定量PCR检测小肠组织中SOD1、SOD2、SOD3、GPX1、CAT、Bcl-2、Bax、Caspase-3、Caspase-9基因表达; Western blot检测小肠组织中ERK1/2、p-ERK1/2、胞浆Nrf2、胞核Nrf2、Bcl-2和Bax蛋白表达。结果:木瓜总三萜(25、50和100mg/kg)可显著降低吲哚美辛诱导小肠黏膜损伤大鼠小肠溃疡指数、病理学评分,改善小肠黏膜溃疡、黏膜及黏膜下层肿胀和炎性浸润,显著升高血液中内源性抗氧化酶活性,显著上调受损小肠组织中SOD1、SOD2、SOD3、GPX1、CAT和p-ERK1/2、胞核Nrf2、HO-1、Bcl-2表达,显著下调Bax和Caspase-3、Caspase-9表达,且随着剂量的增加,其作用效果更明显。结论:木瓜总三萜对NSAIDs诱导大鼠小肠损伤具有较好的保护作用,调节内源性SOD/GPX1/CAT抗氧化系统功能及ERK/Nrf2/HO-1和线粒体凋亡信号通路可能是其作用机制之一。
