三羟异黄酮联合药物GLU保肝解毒的效果与机理性研究

被引:0
作者
黄南山
机构
[1] 合肥工业大学
关键词
三羟异黄酮; 药物GLU; 尿苷二磷酸葡萄糖醛酸转移酶; 对乙酰氨基酚; 肝微粒体体外温孵法; 高效液相;
D O I
暂无
年度学位
2009
学位类型
硕士
导师
摘要
大豆异黄酮是大豆中的一种具有生理功能的活性物质。近年来,随着对其保健作用研究开发的不断深入,大豆异黄酮的存在形式及其生理功能的机理正逐渐被人们认识。本论文进行了三羟异黄酮(Gentistein,Gen)联合药物GLU保肝解毒的效果与机理性研究。利用扑热息痛(又名对乙酰氨基酚,Acetaminophen,APAP)诱导化学性肝损伤小鼠模型,分别测定了血清中天冬氨酸氨基转移酶(aspartate aminotransferase,AST)、丙氨酸氨基转移酶(alanineaminotransferase,ALT)活性与白蛋白(albumin,ALB)、总蛋白(total proteincontent,TP)、谷胱甘肽(glutathione-SH,GSH)含量等指标;通过制备肝脏组织切片,观察与分析核仁形成区嗜银蛋白(Argyrophilic Nucleolar OrganizerRegions,AgNORs)数目、银染核仁与细胞核的面积比(I.S);结合体外模型试验,研究三羟异黄酮诱导尿苷二磷酸葡萄糖醛酸转移酶(uridine diphosphateglucuronosyltransferase,UGTs)的底物活化关系。 结果表明:(1)三羟异黄酮并联合药物GLU使用可以明显地降低由于APAP所引起肝损伤的ALT、AST酶活性水平、提高TP、ALB、GSH的含量,各项指标与空白对照组接近,即能够起到恢复的效果;(2)通过制备肝脏切片以及肝组织学观察与分析,可以看到模型组的肝细胞肿大、疏松,细胞核变形;三羟异黄酮并联合药物GLU使用时,肝细胞的致密性得以恢复,细胞核圆润,AgNORs数目逐渐增多、核仁与细胞核的面积比逐渐变大;(3)三羟异黄酮可以显著上调UGTs活力,降低小鼠血液中对乙酰氨基酚含量,当联合药物GLU使用,血液中对乙酰氨基酚残余量显著下降(P<0.05)。经体外模型试验,结果与体内一致。 综上所述,三羟异黄酮并联合药物GLU使用可以提高对肝脏的保护作用,其作用机理可能是药物GLU进入小鼠体内以后,分解成葡萄糖醛酸,代谢成为尿苷二磷酸葡萄糖醛酸供体,而三羟异黄酮能诱导和调节UGTs活性,使含羟基的对乙酰氨基酚发生葡萄糖醛酸化结合反应,从而使小鼠血液中对乙酰氨基酚含量下降,增强了体内代谢解毒。
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页数:59
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