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Sharma, Shakshi; Zhang, Xiaomin; Azhar, Gohar; Patyal, Pankaj; Verma, Ambika; KC, Grishma; Wei, Jeanne Y
Bioscience, biotechnology, and biochemistry, 01/2024, Volume: 88, Issue: 2Journal Article
ABSTRACT Among the branched-chain amino acids, leucine and isoleucine have been well studied for their roles in improving mitochondrial function and reducing oxidative stress. However, role of valine in mitochondrial function regulation and oxidative stress management remains elusive. This study investigated valine effect on mitochondrial function and oxidative stress in vitro. Valine increased expression of genes involved in mitochondrial biogenesis and dynamics. It upregulates mitochondrial function at complexes I, II, and IV levels of electron transport chain. Flow cytometry studies revealed, valine reduced oxidative stress by significantly lowering mitochondrial reactive oxygen species and protein expression of 4-hydroxynonenal. Functional role of valine against oxidative stress was analyzed by XFe96 Analyzer. Valine sustained oxidative phosphorylation and improved ATP generation rates during oxidative stress. In conclusion, our findings shed more light on the critical function of valine in protecting mitochondrial function thereby preventing mitochondrial/cellular damage induced by oxidative stress. Graphical Abstract Graphical Abstract Valine improves mitochondrial function and protects against oxidative stress. It modulates oxidative phosphorylation, ATP production, and inhibits mitochondrial dysfunction by reducing reactive oxygen species (ROS) production.
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