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中国临床药理学与治疗学 ›› 2024, Vol. 29 ›› Issue (8): 870-878.doi: 10.12092/j.issn.1009-2501.2024.08.004

• 基础研究 • 上一篇    下一篇

淫羊藿苷通过Cx32-Nox4信号通路改善高血压肾纤维化和损伤

吴笑雪1,叶益平2,雷振东3,张尊敬4,陈文霖5   

  1. 1浙江中医药大学附属丽水中医院老年病科,2中医肿瘤科,3老年病科,4呼吸内科,丽水 323000,浙江;5浙江中医药大学附属丽水中医院心血管内科,丽水 323000,浙江
  • 收稿日期:2023-09-06 修回日期:2023-10-07 出版日期:2024-08-26 发布日期:2024-07-17
  • 通讯作者: 张尊敬,硕士,主任中医师,研究方向:中医内科,呼吸,结核。 E-mail: shared7847@21cn.com
  • 作者简介:吴笑雪,女,中医师,研究方向:中医内科。 E-mail: shared7847@21cn.com
  • 基金资助:
    丽水市科学技术局(2021SJZC036)

Icariin improves hypertensive renal fibrosis and injury through Cx32-Nox4 signaling pathway

WU Xiaoxue1, YE Yiping2, LEI Zhendong3, ZHANG Zunjing4, CHEN Wenling5   

  1. 1Department of Geriatrics, Lishui Hospital of Traditional Chinese Medicine, 2Department of Oncology, 3Department of Geriatrics, 4Department of Respiratory Medicine, Lishui 323000, Zhejiang, China;5Lishui Central Hospital, Lishui 323000, Zhejiang, China
  • Received:2023-09-06 Revised:2023-10-07 Online:2024-08-26 Published:2024-07-17

摘要:

目的:探讨淫羊藿苷通过Cx32-Nox4信号通路对高血压肾纤维化和损伤的影响。方法:在自发性高血压大鼠(spontaneously hypertensive rats,SHRs)上建立高血压肾病(hypertensive nephropathy,HN)大鼠模型。实验分为4组:正常对照组(WKY大鼠)、模型组(SHR)、淫羊藿苷10 mg·kg-1·d-1组(每天灌胃淫羊藿苷一次)、淫羊藿苷30 mg·kg-1·d-1组(每天灌胃淫羊藿苷一次),每组10只。在体内检测纤维化相关蛋白的表达。选择暴露于血管紧张素II(AngII)的NRK-52E细胞来观察淫羊藿苷对肾损伤的影响。用蛋白质免疫印迹法和免疫组化检测细胞外基质(extracellular matrix,ECM)的水平,包括α-平滑肌肌动蛋白(α-smooth muscle actin,α-SMA)、I型胶原(collagen I,Col-I)和纤连蛋白(fibronectin,FN)的表达。试剂盒检测氧化应激标记物超氧化物歧化酶(superoxide dismutase,SOD)和丙二醛(malondialdehyde,MDA)表达的变化。结果:淫羊藿苷在体内显著降低SHR大鼠的肾脏纤维化。淫羊藿苷下调α-SMA、FN和Col-I的表达(P<0.05),并保护高血压损伤的肾组织免受进行性纤维化的影响。淫羊藿苷可以显著提高SHR大鼠肾脏和血清中的总SOD活性,显著降低MDA水平(P<0.05)。此外,淫羊藿苷显著提高SHR大鼠肾脏中Cx32的表达,并显著减少Nox4的表达(P<0.05)。淫羊藿苷对 AngII介导的NRK-52E细胞损伤和纤维化具有保护作用。结论:淫羊藿苷可以改善肾小管间质纤维化并延缓HN的进展。肾脏保护可能归因于Cx32-Nox4信号通路介导的氧化应激的调节来实现。

关键词: 淫羊藿苷, Cx32-Nox4信号通路, 高血压肾病, 肾纤维化, 肾损伤

Abstract:

AIM: To investigate the effect of icariin on renal fibrosis and injury in hypertension through Cx32-Nox4 signaling pathway. METHODS: Models of hypertensive nephropathy (HN) were established in spontaneously hypertensive rats (SHRs). The experiment was divided into 4 groups: normal control group (WKY rats), model group (SHR), icariin 10 mg·kg-1·d-1 group (icariin once daily), icariin 30 mg·kg-1·d-1 group (icariin once daily), n=10. The expression of fibrosis-related proteins was detected in vivo. NRK-52E cells exposed to AngII were selected to observe the effects of icariin on kidney injury. Extracellular matrix (ECM) levels, including α-smooth muscle actin (α-SMA), collagen I (Col-I) and fibronectin (FN) expression were measured by Western blot and immunohistochemistry. The expressions of oxidative stress markers including superoxide dismutase (SOD) and malondialdehyde (MDA) were determined by the test kit. RESULTS: Icariin reduced renal fibrosis in SHR rats in vivo. Icariin down-regulated the expression of α-SMA, FN, and Col-I and protected hypertension-damaged kidney tissue from progressive fibrosis (P<0.05). Icariin increased the total SOD activity and decrease the MDA level in kidney and serum of SHR rats (P<0.05). In addition, icariin increased the expression of Cx32 and decreased the expression of Nox4 in the kidneys of SHR rats (P<0.05). Icariin had a protective effect on AngII-mediated NRK-52E cell damage and fibrosis. CONCLUSION: Icariin can improve renal tubulointerstitial fibrosis and delay the progression of HN. Renal protection may be attributed to the regulation of oxidative stress mediated by the Cx32-Nox4 signaling pathway.

Key words: icariin, Cx32-Nox4 signaling pathway, hypertensive nephropathy, renal fibrosis, kidney

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