目的:研究何首乌总苷(polygonum multiflorum total glycoside,PMTG)的抗氧化性及对载脂蛋白E基因缺陷(apoprotein E gene deficiency,ApoE-/-)小鼠实验性动脉粥样硬化(atherosclerosis,As)病变形成的影响。方法:将ApoE-/-小鼠随机分为4...目的:研究何首乌总苷(polygonum multiflorum total glycoside,PMTG)的抗氧化性及对载脂蛋白E基因缺陷(apoprotein E gene deficiency,ApoE-/-)小鼠实验性动脉粥样硬化(atherosclerosis,As)病变形成的影响。方法:将ApoE-/-小鼠随机分为4组:何首乌总苷高剂量组(150 mg.kg-1.d-1)、低剂量组(25 mg.kg-1.d-1)、阿托伐他汀阳性药物组(5 mg.kg-1.d-1)及模型组,给药第10周后全部处死,酶法检测4组血清脂质含量;化学法测氧化指标一氧化氮(NO)、总抗氧化能力(TAC)及丙二醛(MDA);电镜观察主动脉壁内皮细胞形态变化以及免疫组织化学染色方法测定ApoE-/-小鼠主动脉壁NFκB的表达。结果:实验10周后,何首乌总苷高、低剂量组及阳性药物组与模型组比较,显示:①可以显著降低血清总胆固醇(TC),甘油三酯(TG)及低密度脂蛋白-胆固醇(LDL-C)水平(P<0.01);②明显增加血浆NO及TAC(P<0.05及P<0.01),减少MDA的生成(P<0.01);③电镜观察发现何首乌总苷可以维持主动脉壁内皮细胞正常形态;④抑制ApoE-/-小鼠主动脉壁核因子-κB(NF-κB)的表达(P<0.01)。结论:何首乌总苷可能通过抗氧化保护主动脉内皮细胞形态,降低ApoE-/-小鼠氧化型LDL(ox-LDL)、减少主动脉壁NF-κB的表达,从而下调主动脉壁ICAM-1及VCAM-1的表达等环节延缓主动脉斑块的形成,起到防止ApoE-/-小鼠实验性动脉粥样硬化病变形成的作用。展开更多
As an active component extracted from Chinese herb moutan cortex and roots of paeonia lactiflora pallas, paeonol possesses many biological activities, including anti-inflammatory and vascular protection activities. In...As an active component extracted from Chinese herb moutan cortex and roots of paeonia lactiflora pallas, paeonol possesses many biological activities, including anti-inflammatory and vascular protection activities. In this study, athero-protective effects of paeonol were investigated in apoliprotein E deficient（Apo E^–/–） mice through the entire course of atherosclerotic development. Apo E^–/– mice were divided into five groups and fed a high-cholesterol diet（HCD） for 5, 15 and 25 weeks. Then they were fed either paeonol or atorvastatin for 6 weeks. The methods, such as ELISA for serum lipid and cytokine analyses, Western blotting for protein expressions, and HE and oil-red o-staining method, were used for evaluation of thoracic aorta lesion area. The results showed that paeonol could significantly reduce body weight, blood lipid, total cholesterol（TC）, triglyceride（TG） and low density lipoprotein（LDL-C） in Apo E^–/– mice at all stages of the atherosclerosis process. Paeonol also reduced the levels of anti-inflammation factors, such as tumor necrosis factor-α（TNF-α）, interleukin（IL）-6, oxidized LDL cholesterol（ox-LDL）, in serum. In paeonol groups, SOD was significantly increased, whereas MDA was decreased compared with the HCD group（P0.01）. Paeonol markedly attenuated the thickness of the lipid-rich plaque and down-regulated the expressions of VCAM-1 and MMP-9 in aorta of mice, suggesting that paeonol could inhibit formation of plaque and stabilize plaques. Taken together, paeonol appeared to have anti-dyslipidemia and anti-atherosclerotic effects by lipid regulation, and it could inhibit the effects of inflammation and oxidative stress on HCD-fed Apo E^–/– mice through the entire course of atherosclerotic development.展开更多
文摘目的:研究何首乌总苷(polygonum multiflorum total glycoside,PMTG)的抗氧化性及对载脂蛋白E基因缺陷(apoprotein E gene deficiency,ApoE-/-)小鼠实验性动脉粥样硬化(atherosclerosis,As)病变形成的影响。方法:将ApoE-/-小鼠随机分为4组:何首乌总苷高剂量组(150 mg.kg-1.d-1)、低剂量组(25 mg.kg-1.d-1)、阿托伐他汀阳性药物组(5 mg.kg-1.d-1)及模型组,给药第10周后全部处死,酶法检测4组血清脂质含量;化学法测氧化指标一氧化氮(NO)、总抗氧化能力(TAC)及丙二醛(MDA);电镜观察主动脉壁内皮细胞形态变化以及免疫组织化学染色方法测定ApoE-/-小鼠主动脉壁NFκB的表达。结果:实验10周后,何首乌总苷高、低剂量组及阳性药物组与模型组比较,显示:①可以显著降低血清总胆固醇(TC),甘油三酯(TG)及低密度脂蛋白-胆固醇(LDL-C)水平(P<0.01);②明显增加血浆NO及TAC(P<0.05及P<0.01),减少MDA的生成(P<0.01);③电镜观察发现何首乌总苷可以维持主动脉壁内皮细胞正常形态;④抑制ApoE-/-小鼠主动脉壁核因子-κB(NF-κB)的表达(P<0.01)。结论:何首乌总苷可能通过抗氧化保护主动脉内皮细胞形态,降低ApoE-/-小鼠氧化型LDL(ox-LDL)、减少主动脉壁NF-κB的表达,从而下调主动脉壁ICAM-1及VCAM-1的表达等环节延缓主动脉斑块的形成,起到防止ApoE-/-小鼠实验性动脉粥样硬化病变形成的作用。
基金National Natural Science Foundation of China(Grant No.81473386,81773937)Natural Science Fund of Education Department of Anhui Province(Grant No.KJ2015A061)Excellent Researcher Award Program of Anhui Province(Grant No.gxyq ZD2016135)
文摘As an active component extracted from Chinese herb moutan cortex and roots of paeonia lactiflora pallas, paeonol possesses many biological activities, including anti-inflammatory and vascular protection activities. In this study, athero-protective effects of paeonol were investigated in apoliprotein E deficient（Apo E^–/–） mice through the entire course of atherosclerotic development. Apo E^–/– mice were divided into five groups and fed a high-cholesterol diet（HCD） for 5, 15 and 25 weeks. Then they were fed either paeonol or atorvastatin for 6 weeks. The methods, such as ELISA for serum lipid and cytokine analyses, Western blotting for protein expressions, and HE and oil-red o-staining method, were used for evaluation of thoracic aorta lesion area. The results showed that paeonol could significantly reduce body weight, blood lipid, total cholesterol（TC）, triglyceride（TG） and low density lipoprotein（LDL-C） in Apo E^–/– mice at all stages of the atherosclerosis process. Paeonol also reduced the levels of anti-inflammation factors, such as tumor necrosis factor-α（TNF-α）, interleukin（IL）-6, oxidized LDL cholesterol（ox-LDL）, in serum. In paeonol groups, SOD was significantly increased, whereas MDA was decreased compared with the HCD group（P0.01）. Paeonol markedly attenuated the thickness of the lipid-rich plaque and down-regulated the expressions of VCAM-1 and MMP-9 in aorta of mice, suggesting that paeonol could inhibit formation of plaque and stabilize plaques. Taken together, paeonol appeared to have anti-dyslipidemia and anti-atherosclerotic effects by lipid regulation, and it could inhibit the effects of inflammation and oxidative stress on HCD-fed Apo E^–/– mice through the entire course of atherosclerotic development.
