吉林大学学报(医学版) ›› 2026, Vol. 52 ›› Issue (5): 1357-1368.doi: 10.13481/j.1671-587X.20260517

• 基础研究 • 上一篇    

根皮素对野百合碱诱导肺动脉高压大鼠肺血管重构的改善作用

冯丹1,2,钱燕飞3,杨梦源1,2,李晓琴1,2,万千惠1,2,张子旋1,2,赵中阳1,2,张思宇1,2,高瑞娟4(),司军强1,2()   

  1. 1.石河子大学医学院新疆地方与民族高发病教育部重点实验室,新疆 石河子 832002
    2.石河子大学医学院生理学教研室,新疆 石河子 832002
    3.浙江省嘉兴市第一医院麻醉科,浙江 嘉兴 314000
    4.石河子大学第一附属医院影像中心,新疆 石河子 832002
  • 收稿日期:2025-11-06 接受日期:2025-12-31 出版日期:2026-09-28 发布日期:2026-10-15
  • 通讯作者: 高瑞娟,司军强 E-mail:13909937862@163.com;sijunqiang@shzu.edu.cn
  • 作者简介:冯 丹(2000-),女,河南省周口市人,在读硕士研究生,主要从事心血管疾病基础和临床方面的研究。
  • 基金资助:
    新疆生产建设兵团科技局指导性科技计划项目(2022DZ004);石河子大学第一附属医院科研项目(QN202208)

Ameliorative effect of phloretin on pulmonary vascular remodeling in monocrotaline-induced pulmonary arterial hypertensive rats

Dan FENG1,2,Yanfei QIAN3,Mengyuan YANG1,2,Xiaoqin LI1,2,Qianhui WAN1,2,Zixuan ZHANG1,2,Zhongyang ZHAO1,2,Siyu ZHANG1,2,Ruijuan GAO4(),Junqiang SI1,2()   

  1. 1.Ministry of Education,Key Laboratory of Xinjiang Endemic and Ethnic Diseases,School of Medicine,Shihezi University,Shihezi 832002,China
    2.Department of Physiology,School of Medicine,Shihezi University,Shihezi 832002,China
    3.Department of Anesthesiology,First Hospital,Jiaxing City,Zhejiang Province,Jiaxing 314000,China
    4.Medical Imaging Center,First Affiliated Hospital,Shihezi University,Shihezi 832002,China
  • Received:2025-11-06 Accepted:2025-12-31 Online:2026-09-28 Published:2026-10-15
  • Contact: Ruijuan GAO,Junqiang SI E-mail:13909937862@163.com;sijunqiang@shzu.edu.cn

摘要:

目的 探讨根皮素对野百合碱(MCT)诱导的肺动脉高压(PAH)大鼠肺血管重构的改善作用及其对肺动脉平滑肌细胞(PASMCs)增殖和迁移的影响,为PAH的靶向治疗提供依据。 方法 体内实验,将20只雄性SD大鼠随机分为对照组、MCT组(60 mg·kg-1)、低剂量根皮素组(10 mg·kg-1)和高剂量根皮素组(20 mg·kg-1),每组5只。采用超声心动图检测各组大鼠肺动脉加速时间(PAT)和平均肺动脉压(mPAP),HE染色检测各组大鼠肺动脉血管壁厚度百分比(WT%)和血管壁面积百分比(WA%),免疫荧光染色法检测各组大鼠肺组织中增殖细胞核抗原(PCNA)表达水平,Western blotting法检测各组大鼠肺组织中骨桥蛋白(OPN)表达水平。体外实验,采用酶消化法提取大鼠原代PASMCs,将细胞分为对照组、表皮生长因子(EGF)组(20 ng·L-1)、EGF+10 μmol·L-1根皮素组和EGF+20 μmol·L-1根皮素组。采用细胞计数试剂盒8(CCK?8)法检测各组细胞活性,细胞划痕愈合实验和Transwell小室实验检测各组PASMCs划痕愈合率和迁移细胞数,Western blotting法检测各组PASMCs中PCNA蛋白表达水平。 结果 体内实验,与对照组比较,MCT组大鼠PAT明显缩短(P<0.05),mPAP明显升高(P<0.05),肺动脉WT%和WA%均明显升高(P<0.05或P<0.01),肺组织中PCNA蛋白表达水平明显升高(P<0.05),OPN蛋白表达水平明显升高(P<0.05)。与MCT组比较,低和高剂量根皮素组大鼠PAT明显延长(P<0.05或P<0.01),mPAP明显降低(P<0.05或P<0.01),肺动脉WT%和WA%均明显降低(P<0.05或P<0.01),肺组织中PCNA蛋白表达水平明显降低(P<0.05);高剂量根皮素组大鼠肺组织中OPN蛋白表达水平明显降低(P<0.05)。体外实验,与EGF组比较,EGF+10 μmol·L-1根皮素组PASMCs细胞活性明显降低(P<0.05),迁移细胞数明显减少(P<0.05),PCNA蛋白表达水平明显降低(P<0.05),细胞划痕愈合率差异无统计学意义(P>0.05);EGF+20 μmol·L-1根皮素组PASMCs细胞活性明显降低(P<0.05),细胞划痕愈合率明显降低(P<0.01),迁移细胞数明显减少(P<0.01),细胞中PCNA蛋白表达水平明显降低(P<0.01)。 结论 根皮素不仅能有效改善MCT诱导的PAH大鼠肺血管重构,还可抑制EGF诱导的PASMCs增殖和迁移,提示根皮素有望成为治疗PAH的潜在候选药物。

关键词: 根皮素, 肺动脉高压, 血管重构, 野百合碱, 肺动脉平滑肌细胞, 细胞增殖, 细胞迁移

Abstract:

Objective To investigate the ameliorative effect of phloretin on pulmonary vascular remodeling in the rats with monocrotaline (MCT)-induced pulmonary arterial hypertension (PAH) and its effects on the proliferation and migration of pulmonary artery smooth muscle cells (PASMCs), and to provide evidence for targeted therapy of PAH. Methods For in vivo experiments, twenty male Sprague-Dawley rats were randomly divided into control group, MCT group (60 mg·kg-1), low dose of phloretin group (10 mg·kg-1), and high dose of phloretin group (20 mg·kg-1). Echocardiography method was used to detect the pulmonary artery acceleration time (PAT) and mean pulmonary artery pressure (mPAP) in the rats in various groups. HE staining method was used to detect the percentages of pulmonary artery wall thickness (WT%) and percentages of pulmonary artery wall area (WA%) in the rats in various groups. Immunofluorescence staining method was used to detect the expression levels of proliferating cell nuclear antigen (PCNA) protein in the lung tissue of the rats in various groups. Western blotting method was used to detect the expression level of osteopontin (OPN) in the lung tissue of the rats in various groups. For in vitro experiments, the primary PASMCs were extracted from the rats using enzymatic digestion method. The cells were divided into control group, epidermal growth factor (EGF) group (20 ng·L-1), EGF+10 μmol·L-1 phloretin group, and EGF+20 μmol·L-1 phloretin group. Cell counting kit-8 (CCK-8) method was used to detect the activities of the cells in various groups. Wound healing assay and Transwell chamber assay were used to detect the wound healing rates and the numbers of migration cells of PASMCs in cells in various groups. Western blotting method was used to detect the expression levels of PCNA protein in PASMCs in the cells in various groups. Results The in vivo experiments results showed that compared with control group, PAT in the rats in MCT group was significantly shortened (P<0.05), mPAP was significantly increased (P<0.05), the WT% and WA% of the pulmonary artery were significantly increased (P<0.05 or P<0.01), the expression level of PCNA protein in the lung tissue was significantly increased (P<0.05), and the expression level of OPN protein was significantly increased (P<0.05). Compared with MCT group, PATs in the rats in low dose of phloretin group and high dose of phloretin group were significantly prolonged (P<0.05 or P<0.01), mPAPs were significantly decreased (P<0.05 or P<0.01), the WT% and WA% of the pulmonary artery of the rats were significantly decreased (P<0.05 or P<0.01), and the expression levels of PCNA protein in the lung tissue were significantly decreased (P<0.05); the expression level of OPN protein in the lung tissue of the rats in high dose of phloretin group was significantly decreased (P<0.05). The in vitro results showed that compared with EGF group, the cell activity of PASMCs in EGF+10 μmol·L-1 phloretin group was significantly decreased (P<0.05), the number of migration cells was significantly decreased (P<0.05), the expression level of PCNA protein in the cells was significantly decreased (P<0.05), while no significant difference was observed in the wound healing rate(P>0.05); compared with EGF group, the cell activity of PASMCs in EGF+20 μmol·L-1 phloretin group was significantly decreased (P<0.05), the wound healing rate was significantly decreased (P<0.01), the number of migration cells was significantly decreased (P<0.01), and the expression level of PCNA protein was significantly decreased (P<0.01). Conclusion Phloretin not only effectively ameliorates MCT-induced pulmonary vascular remodeling in the MCT-induced PAH rats, but also inhibits EGF-induced proliferation and migration of PASMCs, suggesting that phloretin may serve as a potential candidate drug for the treatment of PAH.

Key words: Phloretin, Pulmonary arterial hypertension, Vascular remodeling, Monocrotaline, Pulmonary arterial smooth muscle cells, Cell proliferation, Cell migration

中图分类号: 

  • R363.1