Succinate as a signaling molecule in the mediation of liver diseases
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE(2024)
Abstract
Succinate, one of the intermediates of the tricarboxylic acid (TCA) cycle, plays an essential role in the metabolism of mitochondria and the production of energy, and is considered as a signaling molecule in metabolism as well as in initiation and progression of hepatic diseases. Of note, succinate activates a downstream signaling pathway through GPR91, and elicits a variety of intracellular responses, such as succinylation, production of reactive oxygen species (ROS), stabilization of hypoxia-inducible factor-1 alpha (HIF-1 alpha), and significant impact in cellular metabolism because of the pivotal role in the TCA cycle. Therefore, it is intriguing to deeply elucidate signaling mechanisms of succinate in hepatic fibrosis, metabolic reprogramming in inflammatory or immune responses, as well as carcinogenesis. This manuscript intends to review current understanding of succinate in mediating metabolism, inflammatory and immunologic reactions in liver diseases in order to establish molecular basis for the development of therapeutic strategies.
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Key words
Succinate,Hepatic fibrosis,Liver cancer,Metabolic reprogramming,HIF-1 alpha stabilization,Microenvironment
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