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Antenatal glucocorticoid therapy increase cardiac alpha-enolase levels in fetus and neonate rats.

机译:产前糖皮质激素治疗会增加胎儿和新生大鼠的心脏α-烯醇酶水平。

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AIMS: Antenatal glucocorticoid therapy has been shown to prevent acute diseases including infant respiratory distress syndrome and reduce mortality, although little is known about the effects on cardiac function-related proteins in the fetus or neonate. We investigated whether cardiac function-related proteins were altered in cardiac tissues of fetuses and neonates born to pregnant rats treated by glucocorticoid. MAIN METHODS: Dexamethasone (DEX) was administered to pregnant rats for 2 days on day 17 and 18 or day 19 and 20 of gestation to simulate antenatal DEX therapy, and cardiac tissues of 19- and 21-day fetuses and 1-, 3-, and 5-day neonates were analyzed using a proteomic technique with liquid chromatography-mass spectrometry/mass spectrometry. KEY FINDINGS: The identified five proteins; alpha-enolase, creatine kinase-M type, beta-tubulin, troponin T, and ATP synthase beta-chain, were significantly increased in fetal cardiac tissues with DEX administration. We observed that significant increase of alpha-enolase in the 19-day fetuses by DEX using Western blotting and immunohistochemistry. ATP and cAMP levels were also increased in the fetal heart tissue. In addition, pyruvate levels were significantly increased in the fetus groups by DEX. SIGNIFICANCE: These results suggest that increased alpha-enolase may contribute to acceleration of glycolysis in the preterm heart.
机译:目的:尽管对胎儿或新生儿心脏功能相关蛋白的影响知之甚少,但已证明产前糖皮质激素疗法可预防包括婴儿呼吸窘迫综合征在内的急性疾病并降低死亡率。我们调查了糖皮质激素治疗的妊娠大鼠的胎儿和新生儿心脏组织中心脏功能相关蛋白是否发生了改变。主要方法:在妊娠的第17天和第18天或第19天和第20天,给怀孕的大鼠服用地塞米松(DEX),为期2天,以模拟产前DEX疗法以及19和21天胎儿以及1-,3-的心脏组织。 ,并使用蛋白质组学技术和液相色谱-质谱/质谱对5天新生儿进行了分析。主要发现:鉴定出五种蛋白质;给予DEX可使胎儿心脏组织中的α-烯醇酶,肌酸激酶M型,β-微管蛋白,肌钙蛋白T和ATP合酶β-链显着增加。我们观察到,使用蛋白质印迹法和免疫组化法,DEX在19天胎儿中的α-烯醇酶显着增加。胎儿心脏组织中的ATP和cAMP水平也升高。此外,DEX使胎儿组的丙酮酸水平显着增加。意义:这些结果表明,增加的α-烯醇酶可能有助于早产心脏糖酵解的加速。

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