Zhao 2024 J Adv Res

From Bioblast
Publications in the MiPMap
Zhao Y, Lu Z, Zhang H, Wang L, Sun F, Li Q, Cao T, Wang B, Ma H, You M, Zhou Q, Wei X, Li L, Liao Y, Yan Z, Liu D, Gao P, Zhu Z (2024) Sodium-glucose exchanger 2 inhibitor canagliflozin promotes mitochondrial metabolism and alleviates salt-induced cardiac hypertrophy via preserving SIRT3 expression. J Adv Res [Epub ahead of print]. https://doi.org/10.1016/j.jare.2024.04.030

Β» PMID: 38744404 Open Access

Zhao Yu, Lu Zongshi, Zhang Hexuan, Wang Lijuan, Sun Fang, Li Qiang, Cao Tingbing, Wang Bowen, Ma Huan, You Mei, Zhou Qing, Wei Xiao, Li Li, Liao Yingying, Yan Zhencheng, Liu Daoyan, Gao Peng, Zhu Zhiming (2024) J Adv Res

Abstract: Excess salt intake is not only an independent risk factor for heart failure, but also one of the most important dietary factors associated with cardiovascular disease worldwide. Metabolic reprogramming in cardiomyocytes is an early event provoking cardiac hypertrophy that leads to subsequent cardiovascular events upon high salt loading. Although SGLT2 inhibitors, such as canagliflozin, displayed impressive cardiovascular health benefits, whether SGLT2 inhibitors protect against cardiac hypertrophy-related metabolic reprogramming upon salt loading remain elusive.

The objective was to investigate whether canagliflozin can improve salt-induced cardiac hypertrophy and the underlying mechanisms.

Dahl salt-sensitive rats developed cardiac hypertrophy by feeding them an 8% high-salt diet, and some rats were treated with canagliflozin. Cardiac function and structure as well as mitochondrial function were examined. Cardiac proteomics, targeted metabolomics and SIRT3 cardiac-specific knockout mice were used to uncover the underlying mechanisms.

In Dahl salt-sensitive rats, canagliflozin showed a potent therapeutic effect on salt-induced cardiac hypertrophy, accompanied by lowered glucose uptake, reduced accumulation of glycolytic end-products and improved cardiac mitochondrial function, which was associated with the recovery of cardiac expression of SIRT3, a key mitochondrial metabolic regulator. Cardiac-specific knockout of SIRT3 not only exacerbated salt-induced cardiac hypertrophy but also abolished the therapeutic effect of canagliflozin. Mechanistically, high salt intake repressed cardiac SIRT3 expression through a calcium-dependent epigenetic modifications, which could be blocked by canagliflozin by inhibiting SGLT1-mediated calcium uptake. SIRT3 improved myocardial metabolic reprogramming by deacetylating MPC1 in cardiomyocytes exposed to pro-hypertrophic stimuli. Similar to canagliflozin, the SIRT3 activator honokiol also exerted therapeutic effects on cardiac hypertrophy.

Cardiac mitochondrial dysfunction caused by SIRT3 repression is a critical promotional determinant of metabolic pattern switching underlying salt-induced cardiac hypertrophy. Improving SIRT3-mediated mitochondrial function by SGLT2 inhibitors-mediated calcium handling would represent a therapeutic strategy against salt-related cardiovascular events. β€’ Keywords: Cardiac hypertrophy, High salt intake, Metabolic reprogramming, SIRT3, Sodium-glucose exchanger 2 inhibitors β€’ Bioblast editor: Plangger M β€’ O2k-Network Lab: CN Chongqing Zhu Z


Labels: MiParea: Respiration, Genetic knockout;overexpression, Pharmacology;toxicology  Pathology: Cardiovascular 

Organism: Mouse  Tissue;cell: Heart  Preparation: Isolated mitochondria 


Coupling state: ET, LEAK, OXPHOS  Pathway: F, N, S, NS, ROX  HRR: Oxygraph-2k 

2024-07, CN 

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