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Scutellarin ameliorates nonalcoholic fatty liver disease through the PPARγ/PGC-1α-Nrf2 pathway

Xiaoxue Zhang1, Renpeng Ji1, Huijun Sun1

  • 1a College of Pharmacy , Dalian Medical University , Dalian , China.

Free Radical Research
|February 6, 2018
PubMed

Insights

Scutellarin, a flavonoid, effectively treats nonalcoholic fatty liver disease (NAFLD) by reducing liver lipids and oxidative stress. It achieves this by activating the PPARγ/PGC-1α-Nrf2 signaling pathway, offering liver protection.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Hepatology

Background:

  • Nonalcoholic fatty liver disease (NAFLD) involves excessive liver fat and oxidative damage.
  • Scutellarin, a flavonoid glycoside, possesses known antioxidative stress properties.
  • Understanding scutellarin's molecular mechanisms in NAFLD is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the molecular mechanisms by which scutellarin ameliorates NAFLD.
  • To evaluate scutellarin's effects on lipid accumulation and oxidative stress in NAFLD models.
  • To elucidate the role of the PPARγ/PGC-1α-Nrf2 signaling pathway in scutellarin's action.

Main Methods:

  • Utilized high-fat diet (HFD) induced NAFLD mouse models and oleic acid-challenged HepG2 cells.
  • Assessed biochemical indicators, lipid levels, and liver pathology via microscopy and Oil Red O staining.
  • Employed qRT-PCR and Western blot to analyze gene and protein expression, including PPARγ inhibition studies.

Main Results:

  • Scutellarin significantly reduced blood lipid levels and enhanced antioxidative capacities in both models.
  • Scutellarin activated key antioxidative genes/proteins (PPARγ, PGC-1α, Nrf2, HO-1, GST, NQO1) and inhibited inflammatory markers (NF-κB, Keap1).
  • Inhibition of PPARγ (using GW9662) diminished scutellarin's beneficial effects, confirming pathway involvement.

Conclusions:

  • Scutellarin exhibits significant hypolipidaemic, antioxidative, and hepatoprotective effects against NAFLD.
  • These protective activities are mediated through the activation of the PPARγ/PGC-1α-Nrf2 signaling pathway.
  • Scutellarin represents a potential therapeutic agent for managing NAFLD.
Keywords:
NAFLDScutellarinantioxidationnuclear factor erythroid-2-related factorperoxisome proliferator-activated receptor-gamma

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