Scholarlink

Background <p>The prevalence of nonalcoholic fatty liver disease (NAFLD) is rising at an alarming rate, making it a major global public health problem. The main pathophysiology of NAFLD is elevated de novo lipogenesis (DNL) in hepatocytes which leads to lipid accumulation. Because of their function in controlling DNL, sirtuin 1 (SIRT1) and AMP-activated protein kinase (AMPK) have been considered viable therapy targets for reduce lipid accumulation.</p> Methods and results <p>We examined the impact of the citrus flavonoid nobiletin (NOB) on the SIRT1-AMPK signaling pathway. This study involved incubating HepG2 cells with varying concentrations of NOB, measuring SIRT1 gene expression using qRT-PCR, assessing SIRT1 enzyme activity using a fluorometric assay, determining SIRT1 protein and AMPK phosphorylation levels by Western blotting, and measuring the lipid profile using semi- and quantitative assays. The results demonstrated that NOB significantly induced SIRT1 mRNA, protein expression, and activity similar to resveratrol (RSV) (as positive controls); additionally, NOB increased the phosphorylation of AMPK. EX-527 (negative control) significantly reversed the stimulatory effect of NOB on SIRT1 and AMPK. On the other hand, NOB decreased total lipid accumulation in cells exposed to oleic acid (OA) and reduced TG content to a normal level. However, the observed results on lipid profile were counteracted in the presence of EX-527.</p> Conclusions <p>NOB might be a new therapeutic approach for lipid accumulation management due to inducing the SIRT1-AMPK signaling pathway, however, it requires further investigations.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nobiletin potentially reduce lipid accumulation by up-regulating the SIRT1-AMPK signaling pathway in HepG2 hepatocarcinoma cells

  • 期刊论文

  • 发表日期：

    2025年5月25日

查看全文
  • Hajar Shokri-Afra,
  • Elham Yousefi Abdolmaleki,
  • Elnaz Sadat Mousavi Sadr Jadidi,
  • Ziaeddin Oladi,
  • Hemen Moradi-Sardareh,
  • Mohsen Nabi Afjadi,
  • Davod Ilbeigi,
  • Haleh Barmaki

摘要

Background

The prevalence of nonalcoholic fatty liver disease (NAFLD) is rising at an alarming rate, making it a major global public health problem. The main pathophysiology of NAFLD is elevated de novo lipogenesis (DNL) in hepatocytes which leads to lipid accumulation. Because of their function in controlling DNL, sirtuin 1 (SIRT1) and AMP-activated protein kinase (AMPK) have been considered viable therapy targets for reduce lipid accumulation.

Methods and results

We examined the impact of the citrus flavonoid nobiletin (NOB) on the SIRT1-AMPK signaling pathway. This study involved incubating HepG2 cells with varying concentrations of NOB, measuring SIRT1 gene expression using qRT-PCR, assessing SIRT1 enzyme activity using a fluorometric assay, determining SIRT1 protein and AMPK phosphorylation levels by Western blotting, and measuring the lipid profile using semi- and quantitative assays. The results demonstrated that NOB significantly induced SIRT1 mRNA, protein expression, and activity similar to resveratrol (RSV) (as positive controls); additionally, NOB increased the phosphorylation of AMPK. EX-527 (negative control) significantly reversed the stimulatory effect of NOB on SIRT1 and AMPK. On the other hand, NOB decreased total lipid accumulation in cells exposed to oleic acid (OA) and reduced TG content to a normal level. However, the observed results on lipid profile were counteracted in the presence of EX-527.

Conclusions

NOB might be a new therapeutic approach for lipid accumulation management due to inducing the SIRT1-AMPK signaling pathway, however, it requires further investigations.