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β-Aminoisobutyric acid supplementation attenuated salt-sensitive hypertension in Dahl salt-sensitive rats through prevention of insufficient fumarase.

Authors :
Zheng, Xuewei
Zhou, Luxin
Jin, Yuexin
Zhao, Xinrui
Ahmad, Hussain
OuYang, Yanan
Chen, Sa
Du, Jie
Chen, Xiangbo
Chen, Lan
Gao, Di
Yang, Zhe
Tian, Zhongmin
Source :
Amino Acids; Feb2022, Vol. 54 Issue 2, p169-180, 12p
Publication Year :
2022

Abstract

The human Dietary Approaches to Stop Hypertension-Sodium Trial has shown that β-aminoisobutyric acid (BAIBA) may prevent the development of salt-sensitive hypertension (SSHT). However, the specific antihypertensive mechanism remains unclear in the renal tissues of salt-sensitive (SS) rats. In this study, BAIBA (100 mg/kg/day) significantly attenuated SSHT via increased nitric oxide (NO) content in the renal medulla, and it induced a significant increase in NO synthesis substrates (l-arginine and malic acid) in the renal medulla. BAIBA enhanced the activity levels of total NO synthase (NOS), inducible NOS, and constitutive NOS. BAIBA resulted in increased fumarase activity and decreased fumaric acid content in the renal medulla. The high-salt diet (HSD) decreased fumarase expression in the renal cortex, and BAIBA increased fumarase expression in the renal medulla and renal cortex. Furthermore, in the renal medulla, BAIBA increased the levels of ATP, ADP, AMP, and ADP/ATP ratio, thus further activating AMPK phosphorylation. BAIBA prevented the decrease in renal medullary antioxidative defenses induced by the HSD. In conclusion, BAIBA's antihypertensive effect was underlined by the phosphorylation of AMPK, the prevention of fumarase's activity reduction caused by the HSD, and the enhancement of NO content, which in concert attenuated SSHT in SS rats. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09394451
Volume :
54
Issue :
2
Database :
Complementary Index
Journal :
Amino Acids
Publication Type :
Academic Journal
Accession number :
156400304
Full Text :
https://doi.org/10.1007/s00726-021-03092-7