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Advanced Science

Advanced Science

IF: 14.3
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Free Cholesterol‐Induced Liver Injury in Non‐Alcoholic Fatty Liver Disease: Mechanisms and a Therapeutic Intervention Using Dihydrotanshinone I

Published:19 November 2024 DOI: 10.1002/advs.202406191 PMID: 39558866
Jia‐Wen Shou, Juncai Ma, Xuchu Wang, Xiao‐Xiao Li, Shu‐Cheng Chen, Byung‐Ho Kang, Pang‐Chui Shaw

Abstract

Build-up of free cholesterol (FC) substantially contributes to the development and severity of non-alcoholic fatty liver disease (NAFLD). Here, we investigate the specific mechanism by which FC induces liver injury in NAFLD and propose a novel therapeutic approach using dihydrotanshinone I (DhT). Rather than cholesterol ester (CE), we observed elevated levels of total cholesterol, FC, and alanine transaminase (ALT) in NAFLD patients and high-cholesterol diet-induced NAFLD mice compared to those in healthy controls. The FC level demonstrated a positive correlation with the ALT level in both patients and mice. Mechanistic studies revealed that FC elevated reactive oxygen species level, impaired the function of lysosomes, and disrupted lipophagy process, consequently inducing cell apoptosis. We then found that DhT protected mice on an HCD diet, independent of gut microbiota. DhT functioned as a potent ligand for peroxisome proliferator-activated receptor α (PPARα), stimulating its transcriptional function and enhancing catalase expression to lower reactive oxygen species (ROS) level. Notably, the protective effect of DhT was nullified in mice with hepatic PPARα knockdown. Thus, these findings are the first to report the detrimental role of FC in NAFLD, which could lead to the development of new treatment strategies for NAFLD by leveraging the therapeutic potential of DhT and PPARα pathway.

Substances (7)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Erythromycin 114-07-8 C37H67NO13 827 suppliers $5.00-$2245.70
Cefadroxil 66592-87-8 C16H17N3O5S.H2O 275 suppliers $5.00-$1686.30
Z-VAD-FMK 187389-52-2 C22H30FN3O7 214 suppliers $50.00-$1950.00
Necrostatin-1 4311-88-0 C13H13N3OS 174 suppliers $26.00-$2000.00
CHLOROQUINE 54-05-7 C18H26ClN3 159 suppliers $9.00-$1550.00
Atorvastatin 110862-48-1 C33H35FN2O5 91 suppliers Inquiry
Mito-TEMPO 1334850-99-5 59 suppliers $65.00-$4469.30

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