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安徽中医药大学 药学院,安徽省中药研究与开发重点实验室,合肥 230012
黄翰文,在读硕士,从事中药心血管药理学研究,E-mail:372242968@qq.com
吴鸿飞,博士,教授,硕士生导师,从事中药心血管药理学研究,E-mail:wuhongfei2009@126.com
戴敏,博士,教授,博士生导师,从事中药心血管药理学研究,E-mail:daiminliao@163.com
收稿日期:2020-10-07,
网络出版日期:2020-11-26,
纸质出版日期:2021-03-20
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黄翰文,刘雅蓉,施晓艳等.基于血管平滑肌自噬探讨瓜蒌-薤白对ApoE-/-小鼠动脉粥样硬化斑块形成的影响[J].中国实验方剂学杂志,2021,27(06):23-29.
HUANG Han-wen,LIU Ya-rong,SHI Xiao-yan,et al.Effect of Trichosanthis Fructus-Allii Macrostemonis Bulbus on Formation of Atherosclerotic Plaque in ApoE-/- Mice Based on Autophagy of Vascular Smooth Muscle[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(06):23-29.
黄翰文,刘雅蓉,施晓艳等.基于血管平滑肌自噬探讨瓜蒌-薤白对ApoE-/-小鼠动脉粥样硬化斑块形成的影响[J].中国实验方剂学杂志,2021,27(06):23-29. DOI: 10.13422/j.cnki.syfjx.20202404.
HUANG Han-wen,LIU Ya-rong,SHI Xiao-yan,et al.Effect of Trichosanthis Fructus-Allii Macrostemonis Bulbus on Formation of Atherosclerotic Plaque in ApoE-/- Mice Based on Autophagy of Vascular Smooth Muscle[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(06):23-29. DOI: 10.13422/j.cnki.syfjx.20202404.
目的
2
探究瓜蒌-薤白药对ApoE
-/-
小鼠动脉粥样硬化(AS)主动脉斑块血管平滑肌细胞(VSMCs)增殖及自噬水平的影响。
方法
2
高脂饲料饲养ApoE
-/-
小鼠40只复制AS动物模型,随机分为模型组、瓜蒌-薤白组、雷帕霉素组、阿伐托他汀组,以普通饮食C57BL/6J小鼠10只为正常组。正常组及模型组给予生理盐水灌胃,瓜蒌-薤白组、雷帕霉素组及阿伐托他汀组每日给予相应药物灌胃,共8周。实验结束后处死小鼠,酶标仪检测小鼠血清,总胆固醇(TC),甘油三酯(TG),高密度脂蛋白胆固醇(HDL-C)及低密度脂蛋白胆固醇(LDL-C)的水平;主动脉油红O染色观察并测量主动脉斑块面积占总面积之比。蛋白免疫印迹法(Western blot)检测主动脉中膜VSMCs增殖相关蛋白增殖细胞核抗原(PCNA),
α
-平滑肌肌动蛋白(
α
-SMA)水平。透射电镜观察VSMCs自噬小体并检测VSMCs自噬相关蛋白酵母ATG6同源物(Beclin-1),酶联相关轻链蛋白Ⅱ(LC3Ⅱ),p62蛋白表达。
结果
2
与模型组比较,瓜蒌-薤白组可显著减少AS小鼠主动脉脂质积累及斑块面积,降低TC,TG,LDL-C水平(
P
<
0.01),升高HDL-C(
P
<
0.05)。瓜蒌-薤白显著降低主动脉VSMCs内增殖相关抗原PCNA及
α
-SMA水平(
P
<
0.01),抑制VSMCs过度增殖;瓜蒌-薤白显著上调主动脉VSMCs内Beclin-1及LC3Ⅱ蛋白表达,降低p62积累(
P
<
0.01),增加VSMCs自噬小体的表达,上调VSMCs自噬水平。
结论
2
瓜蒌-薤白调节AS小鼠体内血脂水平,抑制主动脉VSMCs过度增殖抑制AS小鼠主动脉的斑块形成,其机制可能与其上调VSMCs自噬活性有关。
Objective
2
To explore the effect of Trichosanthis Fructus-Allii Macrostemonis Bulbus medicine on the proliferation and autophagy levels of aortic plaque vascular smooth muscle cells (VSMCs) in ApoE
-/-
mice with atherosclerosis (AS).
Method
2
A total of 40 ApoE
-/-
mice were fed with high-fat diet to replicate AS animal models. They were randomly divided into model group, Trichosanthis Fructus-Allii Macrostemonis Bulbus group, rapamycin group and atorvastatin group, and 10 mice with normal diet C57BL/6J mice were the blank group. The blank group and the model groups were given normal saline by gavage, while Trichosanthis Fructus-Allii Macrostemonis Bulbus group, rapamycin group and atorvastatin group were given corresponding drugs by gavage for 8 weeks. After the experiment, the mice were sacrificed. Total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) levels were detected by the Microplate reader, the ratio of the aortic plaque area to the total area was observed and measured by staining with aortic gross oil red O. Western blot method was used to detect the proliferation-related protein proliferating cell nuclear antigen (PCNA) and
α
-smooth muscle actin (
α
-SMA) levels of VSMCs in the aortic media. Transmission electron microscopy was used to observe the autophagosomes of VSMCs and detect the expressions of VSMCs autophagy-related proteins Beclin-1, light chain proteinⅡ (LC3Ⅱ) and p62.
Result
2
Compared with the model group, the Trichosanthis Fructus-Allii Macrostemonis Bulbus group showed significant reduction in the aortic lipid accumulation and plaque area of AS mice and the levels of TC, TG, LDL-C (
P
<
0.01) and increase of HDL-C (
P
<
0.05). Trichosanthis Fructus-Allii Macrostemonis Bulbus significantly reduced the levels of proliferation-related antigens PCNA and
α
-SMA in aortic VSMCs (
P
<
0.01), and inhibited the excessive proliferation of VSMCs. Trichosanthis Fructus-Allii Macrostemonis Bulbus significantly up-regulated Beclin-1 and LC3Ⅱ in aortic VSMCs protein expression, decreased p62 accumulation (
P
<
0.01), increased the expressions of VSMCs autophagosomes, and increased the autophagy level of VSMCs.
Conclusion
2
Trichosanthis Fructus-Allii Macrostemonis Bulbus regulates blood lipid levels in AS mice, and inhibits the excessive proliferation of aortic VSMCs and plaque formation in the aorta of AS mice. The mechanism may be related to the up-regulation of the autophagy activity of VSMCs.
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