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Metformin Can Enhance the Inhibitory Effect of Olaparib in Bladder Cancer Cells

Bao-Jin Chi1, Yao Sun2, Ling-Li Quan3

  • 1Department of Urology, The First Affiliated Hospital of Jiamusi University, China.

Disease Markers
|July 5, 2022
PubMed
Abstract

Insights

Metformin enhances the effectiveness of olaparib in treating bladder cancer by inhibiting tumor growth and downregulating the STAT3/C-MYC pathway. This combination therapy shows improved outcomes for bladder cancer cells.

Area of Science:

  • Oncology
  • Pharmacology

Background:

  • Bladder cancer is a prevalent urinary system malignancy requiring effective growth inhibition strategies.
  • Olaparib, a PARP inhibitor, targets BRCA1/BRCA2 mutated tumors.
  • Metformin, an antidiabetic drug, has demonstrated potential in reducing cancer incidence and improving patient survival.

Purpose of the Study:

  • To investigate the combined effects of olaparib and metformin on bladder cancer.
  • To determine if metformin enhances olaparib's antitumor activity.
  • To elucidate the role of the STAT3/C-MYC signaling pathway in this combined effect.

Main Methods:

  • Cell viability and proliferation assessed via CCK-8 and colony formation assays.
  • Apoptosis evaluated by flow cytometry.
  • Migration and invasion analyzed using scratch and Transwell assays.
  • STAT3/C-MYC protein expression detected by western blotting.

Main Results:

  • Combined olaparib and metformin showed superior inhibition of bladder cancer cell proliferation, clone formation, migration, and invasion compared to single agents.
  • Metformin enhanced olaparib's inhibitory effect on tumor growth.
  • The combination regulated STAT3/C-MYC signaling pathway proteins.

Conclusions:

  • Metformin significantly potentiates the antitumor effects of olaparib in bladder cancer.
  • These enhanced effects are mediated by the downregulation of STAT3/C-MYC signaling pathway proteins.
  • This combination therapy holds potential for clinical application in bladder cancer treatment.

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