目的探讨磷酸肌酸钠对一次力竭运动大鼠心肌线粒体能量代谢变化的影响,探讨磷酸肌酸钠对应激心肌的保护机制。方法雄性Wistar大鼠36只,随机分为对照组(n=12)、一次力竭组(n=12)、磷酸肌酸钠组(n=12)。实验结束后测定各组心肌ATP含量及...目的探讨磷酸肌酸钠对一次力竭运动大鼠心肌线粒体能量代谢变化的影响,探讨磷酸肌酸钠对应激心肌的保护机制。方法雄性Wistar大鼠36只,随机分为对照组(n=12)、一次力竭组(n=12)、磷酸肌酸钠组(n=12)。实验结束后测定各组心肌ATP含量及血浆肾上腺素(E)、去甲肾上腺素(NE)、游离脂肪酸(FFA)浓度,并采用RT-PCR及Western blotting检测心肌线粒体解偶联蛋白2(UCP2)表达情况。结果与对照组相比,一次力竭组、磷酸肌酸钠组血浆FFA、E、NE浓度均增高(P<0.05),心肌ATP含量均降低。RT-PCR及Western blotting结果显示,一次力竭组、磷酸肌酸钠组UCP2 m RNA表达量分别较对照组增加64%、24%,UCP2蛋白表达量分别较对照组增加65%、26%。相关分析显示,心肌组织UCP2表达量与血浆FFA浓度呈显著正相关(r=0.98,P<0.01),血浆FFA浓度与血浆E、NE水平呈显著正相关(r=0.93,r=0.88,P<0.01)。结论力竭运动后心肌组织UCP2表达量显著上调,ATP合成减少,能量代谢障碍,可能是运动导致心源性猝死的机制之一。补充外源性磷酸肌酸钠可拮抗运动应激导致的UCP2表达升高,增加ATP储备,改善心肌能量代谢,可能对运动导致的心源性猝死预防有一定的积极作用。展开更多
目的探讨不同强度运动对大鼠心肌线粒体解偶联蛋白2(UCP2)表达的影响及其与心肌能量变化的关系。方法雄性Wistar大鼠45只,随机分为安静对照组,渐进训练组、渐进训练力竭组,每组15只。4周后,测定血清游离脂肪酸(FFA)浓度及心肌线粒体三...目的探讨不同强度运动对大鼠心肌线粒体解偶联蛋白2(UCP2)表达的影响及其与心肌能量变化的关系。方法雄性Wistar大鼠45只,随机分为安静对照组,渐进训练组、渐进训练力竭组,每组15只。4周后,测定血清游离脂肪酸(FFA)浓度及心肌线粒体三磷酸腺苷(ATP)含量,反转录聚合酶链反应(RT-PCR)及Western blotting测定心肌线粒体UCP2的表达变化。结果渐进训练力竭组ATP含量明显低于安静对照组与渐进训练组(P<0.01);渐进训练力竭组血清FFA浓度明显升高,分别是安静对照组和渐进训练组的2.0倍和1.7倍(P<0.01)。RT-PCR及Western blotting结果显示,与安静对照组及渐进训练组相比,渐进训练力竭组心肌线粒体UCP2 m RNA和蛋白表达明显升高(P<0.01)。相关性分析显示,心肌线粒体UCP2的表达与血清FFA浓度呈正相关(r=0.795,P<0.01),而与ATP含量呈负相关(r=-0.843,P<0.01)。结论力竭运动训练可引起大鼠血清FFA浓度升高及心肌线粒体ATP含量降低,同时可诱导心肌线粒体UCP2表达。UCP2的表达与FFA浓度呈正相关,而与ATP含量呈负相关,提示UCP2可能参与了力竭运动中心的肌能量代谢。展开更多
The present study involved a questionnaire survey of 156 mothers that gave birth to children with neural tube defects or had a history of pregnancy resulting in children with neural tube defects （case group） and 156...The present study involved a questionnaire survey of 156 mothers that gave birth to children with neural tube defects or had a history of pregnancy resulting in children with neural tube defects （case group） and 156 control mothers with concurrent healthy children （control group） as well as detection of mitochondrial membrane transporter protein gene [uncoupling protein 2 （UCP2）] polymorphism. The maternal UCP2 3＇ untranslated region （UTR） D/D genotype and D allele frequency were significantly higher in the case group compared with the control group （odds ratio （OR） 3.233; 95% confidence interval （C/） 1.103 9.476; P= 0.040; OR： 3.484; 95% CI： for neural tube defects 2.109 5.753; P 〈 0.001）. Univariate and multivariate logistic regression analysis of risk factors for neural tube defects showed that a matemal UCP2 3＇ UTR D/D genotype was negatively interacted with the mothers＇ consumption of frequent fresh fruit and vegetables （S = 0.007）, positively interacted with the mothers＇ frequency of germinated potato consumption （S = 2.15） and positively interacted with the mothers＇ body mass index （S = 3.50）. These findings suggest that maternal UCP2 3＇ UTR gene polymorphism, pregnancy time, consumption of germinated potatoes and body mass index are associated with an increased risk for neural tube defects in children from mothers living in Shanxi province, China. Moreover, there is an apparent gene-environment interaction involved in the development of neural tube defects in offspring.展开更多
目的探讨解偶联蛋白3(uncoupling protein 3,UCP3)基因-55C→T变异与中国东北地区2型糖尿病的关系。方法用聚合酶链反应-限制性片段长度多态性检测100例2型糖尿病患者(男/女为58/42)及113名糖耐量正常者(男/女为56/57)UCP3基因-55C→T...目的探讨解偶联蛋白3(uncoupling protein 3,UCP3)基因-55C→T变异与中国东北地区2型糖尿病的关系。方法用聚合酶链反应-限制性片段长度多态性检测100例2型糖尿病患者(男/女为58/42)及113名糖耐量正常者(男/女为56/57)UCP3基因-55C→T变异的基因型。结果 2型糖尿病组与正常对照组三种基因型频率及等位基因频率分布差异均有显著性意义,P值分别为0.027和0.003,两组间携带T的基因型(CT+TT)频率差异有显著意义(P=0.008);T等位基因与2型糖尿病患者血清总胆固醇(CHOL)及低密度脂蛋白(LDLC)频率升高相关(P为0.021,0.024)。结论 UCP3基因-55C→T变异与中国东北汉族人群2型糖尿病患者局部体脂代谢存在相关性,该基因变异与2型糖尿病发病相关。展开更多
文摘目的探讨磷酸肌酸钠对一次力竭运动大鼠心肌线粒体能量代谢变化的影响,探讨磷酸肌酸钠对应激心肌的保护机制。方法雄性Wistar大鼠36只,随机分为对照组(n=12)、一次力竭组(n=12)、磷酸肌酸钠组(n=12)。实验结束后测定各组心肌ATP含量及血浆肾上腺素(E)、去甲肾上腺素(NE)、游离脂肪酸(FFA)浓度,并采用RT-PCR及Western blotting检测心肌线粒体解偶联蛋白2(UCP2)表达情况。结果与对照组相比,一次力竭组、磷酸肌酸钠组血浆FFA、E、NE浓度均增高(P<0.05),心肌ATP含量均降低。RT-PCR及Western blotting结果显示,一次力竭组、磷酸肌酸钠组UCP2 m RNA表达量分别较对照组增加64%、24%,UCP2蛋白表达量分别较对照组增加65%、26%。相关分析显示,心肌组织UCP2表达量与血浆FFA浓度呈显著正相关(r=0.98,P<0.01),血浆FFA浓度与血浆E、NE水平呈显著正相关(r=0.93,r=0.88,P<0.01)。结论力竭运动后心肌组织UCP2表达量显著上调,ATP合成减少,能量代谢障碍,可能是运动导致心源性猝死的机制之一。补充外源性磷酸肌酸钠可拮抗运动应激导致的UCP2表达升高,增加ATP储备,改善心肌能量代谢,可能对运动导致的心源性猝死预防有一定的积极作用。
文摘目的探讨不同强度运动对大鼠心肌线粒体解偶联蛋白2(UCP2)表达的影响及其与心肌能量变化的关系。方法雄性Wistar大鼠45只,随机分为安静对照组,渐进训练组、渐进训练力竭组,每组15只。4周后,测定血清游离脂肪酸(FFA)浓度及心肌线粒体三磷酸腺苷(ATP)含量,反转录聚合酶链反应(RT-PCR)及Western blotting测定心肌线粒体UCP2的表达变化。结果渐进训练力竭组ATP含量明显低于安静对照组与渐进训练组(P<0.01);渐进训练力竭组血清FFA浓度明显升高,分别是安静对照组和渐进训练组的2.0倍和1.7倍(P<0.01)。RT-PCR及Western blotting结果显示,与安静对照组及渐进训练组相比,渐进训练力竭组心肌线粒体UCP2 m RNA和蛋白表达明显升高(P<0.01)。相关性分析显示,心肌线粒体UCP2的表达与血清FFA浓度呈正相关(r=0.795,P<0.01),而与ATP含量呈负相关(r=-0.843,P<0.01)。结论力竭运动训练可引起大鼠血清FFA浓度升高及心肌线粒体ATP含量降低,同时可诱导心肌线粒体UCP2表达。UCP2的表达与FFA浓度呈正相关,而与ATP含量呈负相关,提示UCP2可能参与了力竭运动中心的肌能量代谢。
基金sponsored by the National Natural Science Foundation of China, No. 31140012, 31040056,31140079the Natural Science Foundation of Shanxi Province,No. 2006011113
文摘The present study involved a questionnaire survey of 156 mothers that gave birth to children with neural tube defects or had a history of pregnancy resulting in children with neural tube defects （case group） and 156 control mothers with concurrent healthy children （control group） as well as detection of mitochondrial membrane transporter protein gene [uncoupling protein 2 （UCP2）] polymorphism. The maternal UCP2 3＇ untranslated region （UTR） D/D genotype and D allele frequency were significantly higher in the case group compared with the control group （odds ratio （OR） 3.233; 95% confidence interval （C/） 1.103 9.476; P= 0.040; OR： 3.484; 95% CI： for neural tube defects 2.109 5.753; P 〈 0.001）. Univariate and multivariate logistic regression analysis of risk factors for neural tube defects showed that a matemal UCP2 3＇ UTR D/D genotype was negatively interacted with the mothers＇ consumption of frequent fresh fruit and vegetables （S = 0.007）, positively interacted with the mothers＇ frequency of germinated potato consumption （S = 2.15） and positively interacted with the mothers＇ body mass index （S = 3.50）. These findings suggest that maternal UCP2 3＇ UTR gene polymorphism, pregnancy time, consumption of germinated potatoes and body mass index are associated with an increased risk for neural tube defects in children from mothers living in Shanxi province, China. Moreover, there is an apparent gene-environment interaction involved in the development of neural tube defects in offspring.
文摘目的探讨解偶联蛋白3(uncoupling protein 3,UCP3)基因-55C→T变异与中国东北地区2型糖尿病的关系。方法用聚合酶链反应-限制性片段长度多态性检测100例2型糖尿病患者(男/女为58/42)及113名糖耐量正常者(男/女为56/57)UCP3基因-55C→T变异的基因型。结果 2型糖尿病组与正常对照组三种基因型频率及等位基因频率分布差异均有显著性意义,P值分别为0.027和0.003,两组间携带T的基因型(CT+TT)频率差异有显著意义(P=0.008);T等位基因与2型糖尿病患者血清总胆固醇(CHOL)及低密度脂蛋白(LDLC)频率升高相关(P为0.021,0.024)。结论 UCP3基因-55C→T变异与中国东北汉族人群2型糖尿病患者局部体脂代谢存在相关性,该基因变异与2型糖尿病发病相关。
