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(5R)-5-hydroxytriptolide ameliorates liver lipid accumulation by suppressing lipid synthesis and promoting lipid

Yunxia Dong1, Henglei Lu2, Qiang Li3

  • 1Center for Drug Safety Evaluation and Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China.

Life Sciences
|July 14, 2019
PubMed
Abstract

Insights

The triptolide analog (5R)-5-hydroxytriptolide (LLDT-8) demonstrates hepatoprotective effects by reducing liver lipid accumulation in a non-alcoholic fatty liver disease (NAFLD) mouse model. LLDT-8 improves liver injury and promotes fatty acid oxidation, offering a novel therapeutic strategy for NAFLD.

Area of Science:

  • Pharmacology
  • Hepatology
  • Metabolic Diseases

Background:

  • Non-alcoholic fatty liver disease (NAFLD) is a growing global health concern characterized by excessive lipid accumulation in the liver.
  • Current therapeutic options for NAFLD are limited, necessitating the exploration of novel treatment strategies.
  • (5R)-5-hydroxytriptolide (LLDT-8), a triptolide analog, has shown potential in treating various conditions, including cancer and inflammatory diseases.

Purpose of the Study:

  • To investigate the potential hepatoprotective effects of LLDT-8 in a mouse model of NAFLD.
  • To elucidate the mechanisms underlying LLDT-8's action on liver lipid metabolism.

Main Methods:

  • Male C57BL/6J mice were induced with NAFLD using a high-fat/high-fructose diet for 29 weeks.
  • Mice were subsequently treated with LLDT-8 (0.5mg/kg and 1mg/kg) or vehicle for 8 weeks.
  • Serum biochemical indexes, liver histology, fatty acid profiles, and gene expression related to lipid metabolism were analyzed.

Main Results:

  • LLDT-8 treatment significantly reduced liver injury, indicated by decreased serum ALT and AST levels and improved hepatic steatosis.
  • LLDT-8 downregulated stearoyl-CoA desaturase 1 (SCD1) expression, inhibiting lipid synthesis.
  • LLDT-8 upregulated key genes involved in fatty acid oxidation (PPARα, Cpt1a, Acox1, Acadl, Acadm) and promoted lipolysis.

Conclusions:

  • LLDT-8 exhibits significant hepatoprotective effects in a NAFLD mouse model.
  • LLDT-8 ameliorates liver lipid accumulation by modulating lipid synthesis and enhancing fatty acid oxidation.
  • LLDT-8 represents a promising therapeutic agent for the management of NAFLD.
Keywords:
(5R)-5-hydroxytriptolideFat depositionFatty acids oxidationLipid synthesisNAFLD

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