Volume 4 Issue 4
Oct.  2024
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Article Contents
Nannan Tang, Jiatong Li, Zhuo Wang, Jinlu Zuo, Zifeng Zhang, Di Huang, Yannan Han, Yuqing Chen, Yilin Sun, Xiang Li, Ruxue Mu, Qingxue Ma, Jie Zhang, Jiaying Wu, He Wang, Hongxia Zhao, Xingli Dong, Zhiguo Wang, Yu Liu, Dan Zhao, Baofeng Yang. Small ubiquitin-like modifiers inhibitors lower blood pressure via ERK5/KLF2-dependent upregulation of the eNOS/NO pathway[J]. Frigid Zone Medicine, 2024, 4(4): 202-211. doi: 10.1515/fzm-2024-0020
Citation: Nannan Tang, Jiatong Li, Zhuo Wang, Jinlu Zuo, Zifeng Zhang, Di Huang, Yannan Han, Yuqing Chen, Yilin Sun, Xiang Li, Ruxue Mu, Qingxue Ma, Jie Zhang, Jiaying Wu, He Wang, Hongxia Zhao, Xingli Dong, Zhiguo Wang, Yu Liu, Dan Zhao, Baofeng Yang. Small ubiquitin-like modifiers inhibitors lower blood pressure via ERK5/KLF2-dependent upregulation of the eNOS/NO pathway[J]. Frigid Zone Medicine, 2024, 4(4): 202-211. doi: 10.1515/fzm-2024-0020

Small ubiquitin-like modifiers inhibitors lower blood pressure via ERK5/KLF2-dependent upregulation of the eNOS/NO pathway

doi: 10.1515/fzm-2024-0020
Funds:

the National Natural Science Foundation of China 82330011

the National Natural Science Foundation of China U21A20339

the CAMS Innovation Fund for Medical Sciences 2020-I2M-5-003

the National Natural Science Foundation of China 82370302

the National Natural Science Foundation of China 31871175

Natural Science Foundation of Heilongjiang Province of China YQ2019H003

College of Pharmacy, Harbin Medical University Excellent Young Talents Funding 2020-YQ-01

More Information
  •   Background  Small ubiquitin-like modifiers (SUMO)ylation is a dynamic and reversible post-translational modification playing pivotal roles in the regulation of cancer, diabetes, heart failure, and neurological diseases. However, whether SUMO inhibitors also have anti-hypertension effect remains yet to be explored.  Methods  Blood pressure was monitored in spontaneously hypertensive rats (SHR) after Tannic acid (TA) administration for 4 weeks. The contents of nitric oxide (NO) and endothelin-1 (ET-1) in the serum of SHR were measured. Isolated endothelium-intact mesenteric artery rings were used to study relaxation effect of SUMO inhibitors. ERK5 SUMOylation was determined using coimmunoprecipitation (co-IP) and immunofluorescence (IF). NO levels were analyzed by IF. The expression levels of KLF2 and p-eNOS were semiquantified by Western blot analysis. The transcriptional activity of eNOS promotor was assayed using ChIP-PCR.  Results  Three SUMO inhibitors all reduced the phenylephrine (PE)-induced contraction of mesenteric artery rings in a concentration-dependent manner. Co-IP revealed that ponatinib promoted ERK5 SUMOylation, which was nulled following pretreatment with the SUMO inhibitors. IF displayed that TA increased ERK5 accumulation and its co-localization with SUMO-1 in the nucleus. ChIP-PCR unveiled TA-induced enhancement of KLF2-dependent eNOS promoter activity and upregulation of eNOS/NO expression in HUVECs. In vivo, TA significantly lowered the blood pressure and improved the vascular reactivity by activating the KLF2/eNOS/NO pathway. Additionally, the level of NO was elevated along with decreased ET-1 levels in the serum of SHR.  Conclusions  SUMO inhibitors inhibit ERK5 SUMOylation to promote KLF2-eNOS/NO signaling, indicating their therapeutic potential for the treatment of hypertension.

     

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