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第41卷第9期 南京医科大学学报(自然科学版)
2021年9月 Journal of Nanjing Medical University(Natural Sciences) ·1281 ·
·基础研究·
法舒地尔二氯乙酸盐对低氧性肺动脉高压大鼠的治疗作用及
机制
刘 萍 ,周 宏 ,伍雪橙 ,黄张建 ,孔 辉 ,解卫平 1*
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南京医科大学第一附属医院呼吸与危重症医学科,江苏 南京 210029;中国药科大学新药研究中心天然药物活性组分与
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药效国家重点实验室,江苏 南京 210009
[摘 要] 目的:研究法舒地尔二氯乙酸盐(fasudil dichloroacetate,FDCA)对低氧性肺动脉高压(hypoxic pulmonary hyperten⁃
sion,HPH)大鼠的治疗作用及其机制。方法:SD大鼠随机分为4组:对照(CON)组、CON+FDCA组、慢性缺氧(chronic hypoxia,
CH)组、CH+FDCA 组。将CH、CH+FDCA 组置于(10.0 ± 0.1)%氧浓度的常压缺氧箱中持续缺氧,CON+FDCA、CH+FDCA 组从
缺氧第15天开始,给予FDCA 43.3 mg/(kg·d)灌胃治疗。缺氧28 d后测量大鼠右心室收缩压(right ventricular systolic pressure,
RVSP)和右心室肥厚指数(right ventricular hypertrophy index,RVHI);采用HE、α⁃SMA免疫组织化学染色及Masson染色评估肺
血管及右心室形态学变化。ELISA 法检测大鼠肺组织中炎症因子白细胞介素(interleukin,IL)⁃1β、IL⁃6、肿瘤坏死因子(tumor
necrosis factor,TNF)⁃α含量以及肌球蛋白轻链激酶(myosin light chain kinase,MLCK)和肌球蛋白磷酸化酶(myosin light chain
phosphorylase,MLCP)水平。Western blot 实验测定大鼠肺组织中 ROCK1、ROCK2 蛋白表达水平。结果:FDCA 可以降低 HPH
大鼠的 RVSP 及 RVHI,缓解右心室心肌肥大,减轻肺血管中膜肥厚程度,降低完全肌化型血管比例,抑制肺血管周围胶原沉
积,并下调肺组织中炎症因子IL⁃1β、IL⁃6、TNF⁃α水平。此外,FDCA可显著降低HPH大鼠肺组织中MLCK水平,并升高MLCP
水平,同时抑制ROCK1、ROCK2蛋白表达。结论:FDCA可抑制肺血管收缩与重构,减轻炎症反应,缓解慢性缺氧诱导的大鼠
肺动脉高压,是一种治疗HPH的潜在化合物。
[关键词] 低氧性肺动脉高压;法舒地尔二氯乙酸盐;肺血管重构
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[中图分类号] R544.1 6 [文献标志码] A [文章编号] 1007⁃4368(2021)09⁃1281⁃08
doi:10.7655/NYDXBNS20210902
Effects and potential mechanisms of fasudil dichloroacetate on hypoxic pulmonary
hypertension in rats
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LIU Ping ,ZHOU Hong ,WU Xuecheng ,HUANG Zhangjian ,KONG Hui ,XIE Weiping 1*
Department of Respiratory and Critical Care Medicine,the First Affiliated Hospital of Nanjing Medical University,
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Nanjing 210029;State Key Laboratory of Natural Medicines,China Pharmaceutical University,Nanjing 210009,
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China
[Abstract] Objective:This study aims to investigate the effects of fasudil dichloroacetate(FDCA)on hypoxic pulmonary
hypertension(HPH)in rats and the potential mechanisms. Methods:SD rats were randomly divided into 4 groups:control(CON)
group,CON+FDCA group,chronic hypoxia(CH)group,and CH+FDCA group. The rats in CH and CH+FDCA groups were exposed to
chronic hypoxia with(10.0 ± 0.1)% oxygen for 28 days,and the rats in CON+FDCA and CH+FDCA groups were given FDCA[43.3 mg/
(kg·d)]intragastrically from the 15th day of hypoxia. After 28 days of hypoxia,right ventricular systolic pressure(RVSP),and right
ventricular hypertrophy index(RVHI)were assessed. The morphological changes of pulmonary vessels and right ventricle were
evaluated by hematoxylin⁃eosin staining,α⁃SMA immunohistochemical staining and Masson’s trichome staining. ELISA was used to
analyze the contents of interleukin(IL)⁃1β,IL⁃6,tumor necrosis factor⁃α(TNF⁃α),the levels of myosin light chain kinase(MLCK)and
[基金项目] 国家科技重大专项(2018ZX10722301⁃002);国家自然科学基金(81870054,81273571);江苏省卫生厅重点项目
(H201601)
∗
通信作者(Corresponding author),E⁃mail: wpxie@njmu.edu.cn