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Regulation at multiple levels control the expression of folate transporters in liver cells in conditions of ethanol exposure and folate deficiency

机译:在乙醇暴露和叶酸缺乏的情况下,多重调控可控制肝细胞中叶酸转运蛋白的表达

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Complex regulatory mechanisms control the expression of folate transporters within cells. Liver is the primary reserve of the folate stores within the body. As excessive alcohol consumption or inefficient dietary folate intake are known to create folate deficiency, so therefore the current study was designed to explore various regulatory mechanisms controlling the expression of folate transport in liver cells in conditions of ethanol exposure and folate deficiency. In order to see whether the effects mediated by the treatments are reversible or not, ethanol removal, and folate repletion was done after ethanol exposure and folate deficiency treatment respectively. Folate deficiency resulted an increase, whereas ethanol treatment decreased the folic acid uptake within the cells. The alterations in folic acid uptake were in agreement with the observed changes in the expression of folate transporters. Ethanol exposure resulted an increase in promoter methylation of reduced folate carrier; however, folate deficiency had no effect. The effects produced by ethanol exposure and folate deficiency were found to be reversible in nature as depicted in case of ethanol removal and folate repletion group. Rate of synthesis of folate transporters was found to be increased whereas half lives of mRNA of folate transporters was found to be decreased on folate deficiency treatment and reverse was the case on ethanol treatment. Overall, alteration in the expression of folate transporters under ethanol exposure and folate deficient conditions can be attributed to those regulatory mechanisms which work at the mRNA level. (c) 2015 BioFactors, 41(4):232-241, 2015
机译:复杂的调节机制控制细胞内叶酸转运蛋白的表达。肝脏是体内叶酸储备的主要储备。由于已知过度饮酒或饮食中叶酸摄入不足会造成叶酸缺乏,因此,本研究旨在探索在乙醇暴露和叶酸缺乏的情况下控制肝细胞中叶酸转运表达的各种调节机制。为了观察由治疗介导的作用是否可逆,分别在乙醇暴露和叶酸缺乏治疗后进行了乙醇去除和叶酸补充。叶酸缺乏导致增加,而乙醇处理降低了细胞内叶酸的吸收。叶酸摄入量的变化与叶酸转运蛋白表达的观察到的变化一致。乙醇暴露导致还原的叶酸载体的启动子甲基化增加。然而,叶酸缺乏没有影响。如乙醇去除和叶酸补充组的情况所示,发现乙醇暴露和叶酸缺乏所产生的作用在本质上是可逆的。发现叶酸转运蛋白的合成速率增加,而叶酸缺乏处理的叶酸转运蛋白mRNA的半衰期降低,而乙醇处理则相反。总的来说,在乙醇暴露和叶酸缺乏的条件下,叶酸转运蛋白表达的改变可归因于在mRNA水平起作用的那些调节机制。 (c)2015生物因子,2015,41(4):232-241

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