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The effects of renal denervation on blood pressure, cardiac hypertrophy, and sympathetic activity during the established phase of hypertension in spontaneously hypertensive rats

Hypertension Research volume 47, pages 1073–1077 (2024)Cite this article

Abstract

This study aimed to investigate whether renal denervation (RDN) reduces blood pressure and attenuates cardiac hypertrophy with decreasing sympathetic activity in spontaneously hypertensive rats (SHRs), a model of essential hypertension, during the established phase of hypertension. We performed RDN or sham operation in 15-weeks-old SHRs. Thirty days after RDN, mean blood pressure measured by telemetry, heart weight, left ventricular wall thickness assessed by echocardiography, and urinary norepinephrine levels were significantly decreased in the RDN group compared to the Sham group. Furthermore, oxidative stress, as indicated by thiobarbituric acid reactive substances, in the rostral ventrolateral medulla, a pivotal region regulating basal sympathetic tone, was significantly decreased in the RDN group. In conclusion, RDN reduces blood pressure and attenuates cardiac hypertrophy with sympathoinhibition in the established phase of hypertension in SHRs. These findings highlight the sympathoinhibitory effect of RDN and suggest that RDN may be a potential therapy for hypertensive cardiac hypertrophy.

Renal denervation reduces blood pressure and attenuates cardiac hypertrophy with sympathoinhibition in the established phase of hypertension in spontaneously hypertensive rats. This study highlights the sympathoinhibitory effect of renal denervation and suggests that renal denervation may be a potential therapy for hypertensive cardiac hypertrophy.

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Acknowledgements

This work was supported by JSPS KAKENHI (JP21K08032, KS; JP20K08431, YH).

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Authors and Affiliations

  1. Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan

    Masato Katsuki, Keisuke Shinohara & Shintaro Kinugawa

  2. Division of Cardiovascular Medicine, Research Institute of Angiocardiology, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan

    Masato Katsuki, Keisuke Shinohara & Shintaro Kinugawa

  3. Department of Medical Technology and Sciences, International University of Health and Welfare, Fukuoka, Japan

    Yoshitaka Hirooka

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  1. Masato Katsuki
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  4. Yoshitaka Hirooka
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Correspondence to Keisuke Shinohara.

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Katsuki, M., Shinohara, K., Kinugawa, S. et al. The effects of renal denervation on blood pressure, cardiac hypertrophy, and sympathetic activity during the established phase of hypertension in spontaneously hypertensive rats. Hypertens Res 47, 1073–1077 (2024). https://doi.org/10.1038/s41440-024-01596-9

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