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Hesperidin alleviates hepatic steatosis and enhances fatty acid oxidation by promoting autophagy

ABSTRACT: Quantitative proteomics reveals hesperidin alleviates hepatic steatosis and enhances fatty acid oxidation by promoting autophagy through mTORC1/ULK1 signaling pathway

ORGANISM(S): Homo Sapiens

SUBMITTER: Chun Liang

PROVIDER: PXD078966 | iProX | Thu May 28 00:00:00 GMT+01:00 2026

REPOSITORIES: iProX

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Fumarate hydratase orchestrates hepatic steatosis via ULK1 mediated lipophagy

Project description:Hepatic lipid homeostasis is coordinated by various metabolic pathways, such as lipogenesis, lipid uptake, storage, and oxidation. However, the underlying mechanism that orchestrates metabolic crosstalk remains unclarified. Herein, we demonstrated that fumarate hydratase (FH) functioned as an indispensable adaptor governing mitochondria metabolism and lipid droplets (LDs) degradation. Hepatic FH overexpression prevented hepatic steatosis in normal mice and ob/ob mice without interfering mitochondrial lipid oxidation and lipogenesis. Strikingly, we found that FH selectively activated lipophagy-mediated LDs lipidolysis. Mechanistically, FH interacted with ULK1 and stabilized ULK1 through preventing its ubiquitination and degradation, resulting in lipophagy activation and the elimination of hepatic lipid accumulation. Meanwhile, hepatic ULK1 deficiency abrogated the protective effects in FH-overexpressing mice. Also, we clarified that the interaction between FH and ULK1 occurred in cytoplasm, but not in mitochondria. Cytoplasmic FH was sensitive to lipids and downregulated without affecting mitochondrial FH in vivo. Moreover, the FH-ULK1 axis was identified closely associated with hepatic steatosis in human patients. Taken together, our research demonstrates a “two-side” insight of FH on hepatic lipid metabolism and provides a promising strategy for fatty liver treatment.

2024-02-26 | GSE256510 | GEO

Fumarate hydratase orchestrates hepatic steatosis via ULK1 mediated lipophagy

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The Plant-derived Lipoxygenase Inhibitor Nordihydroguaiaretic Acid (NDGA) Attenuates Dyslipidemia and Hepatic Steatosis by Enhancing Fatty Acid Oxidation through Activation of PPAR-alpha

Project description:To test whether NDGA attenuate dyslipidemia and hepatic steatosis by enhancing fatty acid oxidation through activation of PPAR-α. Using wild type (WT, C57BL/6) fed with chow diet as control, WT mice were either fed with high-fat diet or high-fat diet with NDGA (2.5g/kg food); ob/ob mice were fed with either chow or chow with NDGA (2.5 g/kg food), and maintained on the respective diets for 16 weeks. The expression of lipid metabolism related genes in the liver of these mice were analyzed using Phalanx GPL6845 platform (Mouse OneArray V1). Together with other biochemical/physiological data, our results suggest that the beneficial actions of NDGA on dyslipidemia and hepatic steatosis in ob/ob mice are exerted primarily through enhanced fatty acid oxidation and energy utilization via the activation of PPAR- α receptor activity. To examine the changes in gene expression in liver of WT and ob/ob mice with different NDGA diet treatment, RNA isolated from 3 animals of each group were used for studies of gene expression profiles. Phalanx GPL6845 platform (Mouse OneArray V1) was used for the microarrays analysis.

2012-03-29 | E-GEOD-35075 | biostudies-arrayexpress

CPEB4 prevents hepatic steatosis

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ARID2 mitigates hepatic steatosis via promoting the ubiquitination of JAK2

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The interplay between dietary fatty acids and gut microbiota influences host metabolism and hepatic steatosis

Project description:Dietary lipids can affect metabolic health through gut microbiota-mediated mechanisms, but the influence of lipid-microbiota interaction on liver steatosis is unknown. We investigated the effect of dietary lipid composition on human microbiota in an observational study and combined diet experiments with microbiota transplants to study lipid-microbiota interactions and liver status in mice. In humans, low intake of saturated fatty acids (SFA) was associated with increased microbial diversity independent of fiber intake. In mice, cecum levels of SFA correlated negatively with microbial diversity and were associated with a shift in butyrate and propionate producers. Mice fed poorly absorbed SFA had improved metabolism and liver status. These features were transmitted by microbial transfer. Diets enriched in n-6- and/or n-3-polyunsaturated fatty acids were protective against steatosis but had minor influence on the microbiota. In summary, we find that unabsorbed SFA correlate with microbiota features that may be targeted to decrease liver steatosis.

2023-08-03 | GSE222060 | GEO

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