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口服蛋氨酸造成的大鼠肾间质纤维化模型及其机制研究 被引量:2

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摘要 目的:研究口服蛋氨酸造成的大鼠肾间质纤维化模型及叶酸的治疗作用,同时观察同型半胱氨酸对人近曲小管上皮细胞增殖的影响,并初步探讨其机制。方法:24只普通SD大鼠随机分成三组,分别灌以双蒸水,蛋氨酸,蛋氨酸+叶酸,120天后处死大鼠,测定血浆同型半胱氨酸浓度,观察肾间质纤维化程度及检测组织中E-钙连接蛋白的表达;同时培养人近曲小管上皮细胞,观察同型半胱氨酸单独处理及叶酸联合处理后细胞的增殖情况及α-平滑肌肌动蛋白、E-cad的表达。结果:(1)蛋氨酸组血浆同型半胱氨酸水平较对照组显著升高,肾间质出现一定程度的纤维化,组织中E-cad的表达显著下调。(2)细胞中E-cad的表达显著下调、α–SMA的表达显著增高,细胞增殖明显。(3)叶酸治疗能显著减轻蛋氨酸所致的高同型半胱氨酸血症和肾间质纤维化,上调E-cad的水平,降低α-SMA的表达,抑制细胞的增殖。结论:通过口服蛋氨酸促发高同型半胱氨酸血症能诱导肾间质纤维化,其机制可能与肾小管上皮细胞的异常增殖及肾小管上皮转分化有关;叶酸能对抗这一作用。
出处 《海峡科学》 2015年第11期28-30,36,共4页 Straits Science
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