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Author Spotlight: Unveiling the Role of TMOD3 in Platinum Resistance and Immune Infiltration in Ovarian Cancer
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miR-509-3p enhances platinum drug sensitivity in ovarian cancer

Leilei Niu1, Hua Ni2, Yingzi Hou3

  • 1Department of Obstetrics and Gynecology, Third Hospital, Peking University, Beijing 100191, China; Department of Obstetrics and Gynecology, He Nan Provincial People's Hospital, Zhengzhou 450000, China.

Gene
|November 9, 2018
PubMed

Insights

MicroRNAs regulate gene expression and drug resistance. This study found miR-509-3p is down-regulated in platinum-resistant ovarian cancer, suggesting it

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Platinum-based chemotherapy is a cornerstone in ovarian cancer treatment.
  • Drug resistance, particularly to platinum agents, significantly limits treatment efficacy.
  • MicroRNAs (miRNAs) are key regulators of gene expression implicated in multi-drug resistance.

Purpose of the Study:

  • To investigate the role of specific microRNAs in platinum drug resistance in ovarian cancer.
  • To identify potential miRNA biomarkers for platinum-resistant ovarian cancer.

Main Methods:

  • Comparative miRNA expression profiling of platinum-resistant versus sensitive ovarian cancer tissues.
  • Quantitative reverse transcription polymerase chain reaction (RT-qPCR) for miR-509-3p validation.
  • In vitro functional assays using SKOV3 ovarian cancer cells to assess the impact of miR-509-3p inhibition on cisplatin sensitivity.
  • Dual-luciferase reporter assays to confirm direct targeting of GOLPH3 and WLS by miR-509-3p.

Main Results:

  • miR-509-3p was significantly downregulated in cisplatin-resistant ovarian cancer tissues and cells.
  • Inhibition of miR-509-3p reduced cellular response to cisplatin and promoted cell survival.
  • miR-509-3p directly targets and negatively regulates the expression of Golgi phosphoprotein-3 (GOLPH3) and wntless Wnt ligand secretion mediator (WLS).

Conclusions:

  • Downregulation of miR-509-3p is associated with platinum resistance in ovarian cancer.
  • miR-509-3p may play a crucial role in modulating chemoresistance by targeting GOLPH3 and WLS.
  • Targeting miR-509-3p presents a potential therapeutic strategy for overcoming platinum resistance in ovarian cancer.
Keywords:
Drug resistanceGene silencingOvarian cancermicroRNA

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