ArticleAnnals of translational medicine2021
The effects of S-nitrosylation-induced PPARγ/SFRP5 pathway inhibition on the conversion of non-alcoholic fatty liver to non-alcoholic steatohepatitis.
Article in Annals of translational medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- Impact of Altered Body Composition on Clinical and Oncological Outcomes in Intrahepatic Cholangiocarcinoma.Journal of clinical medicine · 2023Article
- Disturbances of the Lung Glutathione System in Adult Guinea Pigs Following Neonatal Vitamin C or Cysteine Deficiency.Antioxidants (Basel, Switzerland) · 2023Article
- Targeting protein modifications in metabolic diseases: molecular mechanisms and targeted therapies.Signal transduction and targeted therapy · 2023Review
- Nitrosative Stress and Human Disease: Therapeutic Potential of Denitrosylation.International journal of molecular sciences · 2021Review
- The Emerging Role of Sfrp5 and Wnt5a in the Pathogenesis of Obesity: Implications for a Healthy Diet and Lifestyle.Nutrients · 2021Review
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Authors and funding
5 authors at 2 institutions in 1 country.
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Abstract
backgroundPeroxisome proliferators-activated receptors γ (PPARγ) and secreted frizzled related protein 5 (SFRP5) are abnormally expressed in liver cells. But their role in the transformation of non-alcoholic fatty liver (NAFL) to non-alcoholic steatohepatitis (NASH) remains to be studied. We aimed to explore the role of S-nitrosylation (SNO) in the conversion of NAFL to NASH via the peroxisome PPARγ/SFRP5 pathway.
methodsA normal diet and methionine-choline deficient diet were used to construct the NAFL and NASH mouse models, respectively. The differences between the SNO of PPARγ in both models were measured by irreversible biotinylation. Quantitative reverse transcription PCR (qRT-PCR) and Western blotting were used to detect the effect of SNO on the expression of PPARγ messageRNA (mRNA) and protein in L02 hepatocytes. Nubiscan software, luciferase reporter gene, and chromatin immunoprecipitation assay (CHIP) were used to verify the targeting relationship between PPAR and SFRP5. The expression of tumor necrosis factor α (TNFα), interleukin-1β (IL-1β), and interleukin-6 (IL-6), which are indicators for the activation of Kupffer cells, were determined by enzyme linked immunosorbent assay (ELISA) after co-cultivation of L02 hepatocytes and Kupffer macrophages, as well as the exogenous regulation of SNO, PPARγ, and SFRP5 in hepatic L02 cells.
resultsThe NAFL and NASH mouse models were successfully constructed, and the level of PPARγ SNO in the NAFL model was significantly lower than the NASH model (P<0.05). The level of PPARγ was significantly downregulated after increasing the SNO of L02 cells, respectively (P<0.05). Nubiscan software and CHIP confirmed that PPARγ could bind to the promoter region of SFRP5 (P<0.05). Overexpression of PPARγ and SFRP5 could significantly downregulate the expression of TNFα, IL-1β, and IL-6 (P<0.05) correspondingly, while increasing the SNO level of L02 cells could restore the expression levels of TNFα, IL-1β, and IL-6.
conclusionsSNO promoted the activation of macrophage Kupffer cells by inhibiting the PPARγ/SFRP5 pathway in L02 hepatocytes, thereby promoting the conversion of NAFL into NASH.
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