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Fatostatin suppresses growth and enhances apoptosis by blocking SREBP-regulated metabolic pathways in endometrial

Shuhong Gao1, Zhengzheng Shi2, Xin Li3

  • 1Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China.

Oncology Reports
|February 14, 2018
PubMed

Insights

Fatostatin effectively inhibits endometrial carcinoma (EC) cell growth and spread by blocking sterol regulatory element-binding protein (SREBP) pathways. This compound induces apoptosis and may offer a new therapeutic strategy for EC treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Fatostatin is a sterol regulatory element-binding protein (SREBP) pathway inhibitor with known antitumor activity.
  • Endometrial carcinoma (EC) is a significant gynecological malignancy requiring novel therapeutic approaches.

Purpose of the Study:

  • To investigate the antitumor effects and underlying mechanisms of fatostatin in endometrial carcinoma (EC) cells.
  • To determine if fatostatin can inhibit EC cell proliferation, invasion, and migration.
  • To elucidate the impact of fatostatin on SREBP pathway activity and apoptosis in EC.

Main Methods:

  • Cell viability and colony formation assays were performed to assess proliferation.
  • Invasion and migration assays were used to evaluate cellular motility.
  • Western blotting was employed to measure protein expression levels of SREBPs, downstream targets, and apoptosis markers (caspase-9, caspase-3, PARP).
  • Quantitative assays measured free fatty acid and total cholesterol levels.

Main Results:

  • Fatostatin significantly inhibited EC cell viability, colony formation, invasion, and migration.
  • Fatostatin induced cell cycle arrest at the G2/M phase and promoted caspase-mediated apoptosis.
  • Protein and mRNA levels of nuclear SREBPs and their downstream genes were downregulated.
  • Levels of free fatty acids and total cholesterol were decreased in EC cells treated with fatostatin.

Conclusions:

  • Fatostatin demonstrates potent antitumor effects in endometrial carcinoma by inhibiting SREBP-regulated metabolic pathways.
  • The mechanism involves downregulation of SREBP activity, induction of apoptosis, and reduction of key metabolites.
  • Fatostatin represents a promising therapeutic candidate for endometrial carcinoma treatment.

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