1.西南医科大学附属医院急诊医学部,四川 泸州 646000
2.泸州市人民医院,四川 泸州646000
陈琳,在读硕士生,研究方向:血管损伤,E-mail:chenshulin1995@163.com
纸质出版日期:2021-03-20,
收稿日期:2020-12-14,
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陈琳,程玲霞,杨帆等.血管平滑肌细胞自噬对小鼠主动脉夹层形成的影响[J].中山大学学报(医学科学版),2021,42(02):226-234.
CHEN Lin,CHENG Ling-xia,YANG Fan,et al.Impact of Autophagy in Vascular Smooth Muscle Cells on Mouse Aortic Dissection[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(02):226-234.
目的
2
研究血管平滑肌自噬对小鼠主动脉夹层形成的影响。
方法
2
①构建小鼠主动脉夹层模型:60只C57BL/6小鼠被随机分为三组:阴性对照组、实验(AD)组、氯喹(CQ)干预组,实验组与CQ组使用β-氨基丙腈(BAPN)喂养联合人血管紧张素-Ⅱ(Ang-Ⅱ)皮下注射16 d构建小鼠主动脉夹层的模型,同时干预组每天腹腔注射CQ,对照组给予生理盐水。②Yes相关蛋白(YAP)、自噬相关蛋白及血管平滑肌细胞相关标志蛋白的检测:采用蛋白质免疫印迹法、免疫组织化学染色法对小鼠主动脉样本中YAP、微管相关蛋白1轻链3(LC3)、P62及血管平滑肌细胞不同表型相关标志蛋白进行检测。
结果
2
①实验组主动脉夹层的发生率为60%,干预组小鼠未见明显主动脉夹层形成征象。②与对照组相比,实验组与干预组小鼠主动脉中合成型血管平滑肌细胞(VSMC)标志蛋白骨桥蛋白(OPN)、LC3含量明显增高,同时,收缩型VSMC标志蛋白α-SMA及YAP蛋白的表达下降(
P
<
0.05)。
结论
2
在BAPN联合Ang-Ⅱ构建的小鼠主动脉夹层模型中,YAP蛋白调控VSMC表型转化,且该过程受到自噬的调节,自噬可能作为YAP蛋白调控VSMC表型转化致小鼠主动脉夹层形成的关键。
Objective
2
To identify the role of autophagy in vascular smooth muscle cells (VSMC) and the formation of aortic dissection (AD) using a murine model.
Methods
2
①Sixty C57BL/6 mice were randomly divided into three groups: control group, model group and chloroquine (CQ) group. The model and CQ groups were fed β-aminopropionitrile (BAPN) and injected with human angiotensin-Ⅱ (Ang-Ⅱ) for 16 days. The CQ group had chloroquine injected into the abdominal cavity of the mice daily while the control group was injected with normal saline using the same method. ②YAP, LC3, p62 and different phenotype related marker proteins were measured by western blot and immunohistochemistry staining.
Results
2
①The incidence of AD was 60% in the model group, while there was no case found in the CQ group. ②LC3 and synthetic related marker proteins of VSMC were significantly and highly expressed in the model and CQ groups, whereas the expression of VSMC contractile phenotype proteins and YAP inversely decreased(
P
<
0.05).
Conclusion
2
Results demonstrate that autophagy regulates the phenotypic transformation of VSMC via YAP protein pathways.
小鼠主动脉夹层自噬血管平滑肌细胞Yes相关蛋白
mouseaortic dissectionautophagyvascular smooth muscle cellYAP
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