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首页> 外文期刊>Electrophoresis: The Official Journal of the International Electrophoresis Society >LONG-TERM INDUCTION OF AN ALDOSE REDUCTASE PROTEIN BY BASIC FIBROBLAST GROWTH FACTOR IN RAT ASTROCYTES IN VITRO
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LONG-TERM INDUCTION OF AN ALDOSE REDUCTASE PROTEIN BY BASIC FIBROBLAST GROWTH FACTOR IN RAT ASTROCYTES IN VITRO

机译:碱性成纤维细胞生长因子长期诱导大鼠星形胶质细胞醛糖还原酶蛋白的表达

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摘要

Basic fibroblast growth factor (bFGF) is known to elicit various developmental-like effects on astrocytes in vitro, but these effects were studied mainly over short-term periods. In this work we asked the question whether bFGF could induce long-term effects on rat astrocytes in culture. This factor was found to induce only a transient mitogenic effect lasting less than 48 h, even when the treatment was carried on for 4 days. By contrast, it induced long-term effects on the rate of synthesis of several proteins as seen by two-dimensional polyacrylamide gel electrophoresis after labeling the cells with [S-35]methionine. The most upregulated protein was extracted from preparative gels of soluble extracts of cultured bFGF-treated astrocytes and of normal brain. It was characterized by internal amino acid microsequencing. Two tryptic digest peptides had N-terminal sequences similar to rat lens aldose reductase. This protein was also expressed in oligodendroglial and neuronal cells in culture, but it was not upregulated by bFGF. Aldose reductase is thought to be involved in a minor pathway of glucose metabolism and in diabetic complications. Its longterm regulation by bFGF will possibly help in the understanding of its actual physiological role. [References: 50]
机译:已知碱性成纤维细胞生长因子(bFGF)在体外对星形胶质细胞产生多种发育样作用,但是主要在短期内研究了这些作用。在这项工作中,我们提出了一个问题,即bFGF是否可以对培养的大鼠星形胶质细胞产生长期影响。发现该因子仅诱导持续少于48小时的瞬时有丝分裂作用,即使治疗进行4天也是如此。相比之下,用[S-35]蛋氨酸标记细胞后,通过二维聚丙烯酰胺凝胶电泳可以看出,它对几种蛋白质的合成速率具有长期影响。从培养的bFGF处理过的星形胶质细胞和正常脑的可溶性提取物的制备凝胶中提取出上调程度最高的蛋白质。其特征在于内部氨基酸微测序。两种胰蛋白酶消化肽的N端序列与大鼠晶状体醛糖还原酶相似。该蛋白还在培养的少突胶质细胞和神经元细胞中表达,但并未被bFGF上调。醛糖还原酶被认为与葡萄糖代谢的次要途径和糖尿病并发症有关。 bFGF对bFGF的长期调节可能有助于理解其实际的生理作用。 [参考:50]

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