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[Improve the chemosensitivity of resistant ovarian cancer cell by small RNA interference]

Jiang-Yan Lou1, Zhi-Lan Peng, Ying Zheng

  • 1Department of Obsterics and Gynecology, West China Second Hospital, Sichuan University, Chengdu 610041, China.

Sichuan Da Xue Xue Bao. Yi Xue Ban = Journal of Sichuan University. Medical Science Edition
|June 26, 2008
PubMed
Abstract

Insights

Small interfering RNA (siRNA) reversed multidrug resistance in ovarian cancer cells by enhancing sensitivity to P-glycoprotein-transported drugs. This RNA interference approach offers a potential strategy for overcoming chemotherapy resistance.

Area of Science:

  • Molecular Biology
  • Oncology
  • Pharmacology

Background:

  • Ovarian cancer often develops resistance to chemotherapy, limiting treatment efficacy.
  • Multidrug resistance (MDR) is a significant challenge in ovarian cancer treatment, mediated by proteins like P-glycoprotein (P-gp).

Purpose of the Study:

  • To evaluate the efficacy of small interfering RNA (siRNA) in reversing drug resistance in ovarian cancer cells.
  • To investigate the impact of siRNA on the sensitivity of ovarian cancer cells to chemotherapeutic agents.

Main Methods:

  • Human ovarian cancer cell line OVCAR8/TR was used.
  • siRNA was delivered into cells using lipofection.
  • ATP-bioluminescence assay measured drug sensitivity before and after siRNA transfection.

Main Results:

  • OVCAR8/TR cells exhibited resistance to cisplatin (cDDP), doxorubicin (ADM), and paclitaxel (Taxol).
  • Post-siRNA transfection, cells showed increased sensitivity to ADM and Taxol, drugs transported by P-gp.
  • The inhibition rate for ADM increased from 37% to 58%, and for Taxol from 26% to 78%.

Conclusions:

  • siRNA effectively reverses P-gp-mediated drug resistance in ovarian cancer.
  • RNA interference is a promising strategy for overcoming MDR1-mediated drug resistance in ovarian cancer cells.

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