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- 2018
从改善“脂毒性”看六味地黄丸对自发性糖尿病OLETF大鼠肝脏的保护
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Abstract:
摘要 目的： 通过观察六味地黄丸对自发性2型糖尿病OLETF大鼠血清脂代谢指标及肝脏组织学的影响,从改善“脂毒性”角度探讨六味地黄丸通过保护肝脏,预防糖尿病的可能机制.方法: 自发性2型糖尿病大鼠OLETF鼠40只,随机分为六味地黄丸干预组和对照组,LETO鼠10只作为正常对照组.干预组从8周龄起每天以质量分数为2.4 mg/kg的六味地黄丸灌胃给药,其余两组以等量清水灌胃.定期口服葡萄糖耐量(OGTT)试验.于8、32和40周龄时分批宰杀大鼠.检测血清甘油三酯、血清胆固醇、血清游离脂肪酸.分离肝脏,HE染色观察肝脏结构组织学变化;苏丹Ⅲ染色观察肝脏脂肪变性程度.结果: 干预组的发病率显著低于同时期对照组(P<0.01).LETO组无IGT或糖尿病发生.干预组血清甘油三酯、胆固醇和血清游离脂肪酸显著低于对照组(P<0.05),与LETO组相比无显著性差异(P<0.05).随着糖尿病病程进展,OLETE大鼠肝脏的脂肪浸润呈渐进性加重;经过六味地黄丸干预的糖尿病大鼠肝脏结构保存明显优于对照组.LETO组大鼠肝脏结构随着周龄延长无明显变化.结论: 六味地黄丸早期干预能降低糖尿病大鼠糖尿病发病率,改善脂代谢,减少肝脏局部脂肪堆积,减轻肝脏脂毒性,保护肝脏形态,可能是其预防糖尿病的机制之一.
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