姜黄素对实验性动脉粥样硬化家兔的影响

目的 观察姜黄素对实验性动脉粥样硬化(atherosclerosis,AS)家兔血浆内皮素(ET)、血浆一氧化氮(NO)水平和结构型一氧化氮合酶(constitutive NOS.cNOS)活性的影响.探讨其影响动脉粥样硬化的机制.方法 将28只雄性日本大耳白兔随机分为3组.即对照组(喂食普通饲料)、模型组(喂食高脂饲料)和姜黄素组(喂食高脂饲料 100mg·kg-1·d-1姜黄素).喂食12周后,取耳缘动脉血测定血总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、NO和ET水平;处死家兔取主动脉,测cNOS活力及主动脉内膜脂质斑块面积;取主动脉弓作病理切片.结果 姜黄素组和模型组TC、LDL-C及ET水平均明显高于对照组(P<0.05),而血浆NO及cNOS均明显低于对照组(P<0.01或<0.05),姜黄素组TC、LDL-C、ET水平均显著低于模型组(均P<0.01),而血浆NO及cNOS活力均显著高于模型组(均P<0.01);姜黄素组主动脉内膜脂质斑块相对面积[(33.23%±10.59)%]明显小于模型组[(52.69%±12.20)%](P＜0.05).结论 姜黄素可以降低血脂和血浆ET水平,并能提高血浆NO及动脉壁组织cNOS活性,减少内膜斑块形成,具有抗动脉粥样硬化作用.

Effects of crucumin on plasma levels of ET, No and cNOS in rabbits with experimental atherosclerosis

Objective To investigate the effects of curcumin on the plasma levels of endothelin (ET),nitric oxide (NO) and constitutive nitric oxide synthase (cNOS) in rabbits with atherosclerosis. Methods Twenty-eight male Japanese white rabbits were randomly divided into three groups: the control group (fed with a standard diet),model group(fed with a high-cholesterol diet) and curcumin group(fed with a high-cholesterol diet and received 100 mg/kg curcumin orally). The blood samples were collected in all groups 12 we...