Leukotriene B4 receptor-2 contributes to chemoresistance of SK-OV-3 ovarian cancer cells through activation of signal transducer and activator of transcription-3-linked cascade

JaeIn Park, Soo Young Park, Jae-Hong Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Inflammation and inflammatory mediators are intimately linked with chemoresistance through complex pathways in the tumor microenvironment. However, the mechanism by which inflammatory mediators (e.g., eicosanoids) contribute to chemoresistance remains elusive. In this study, we found that the low-affinity leukotriene B4 receptor-2 (BLT2) and its ligand leukotriene B4 were highly up-regulated in cisplatin-resistant SK-OV-3 ovarian cancer cells and play critical roles in mediating the chemoresistance through the activation of signal transducer and activator of transcription-3 (STAT-3) and the subsequent up-regulation of interleukin-6 (IL-6). BLT2 depletion with siRNA clearly abolished the chemoresistance to cisplatin in SK-OV-3 ovarian cancer cells and further increased cell sensitivity to cisplatin chemotherapy by down-regulating the 'STAT-3-IL-6' cascade. Enlarged tumor formation due to the cisplatin resistance of SK-OV-3 cells in cisplatin-treated athymic mice was also substantially reduced by co-treatment with the BLT2 inhibitor in vivo. Our study demonstrates that BLT2 is a novel contributor to cisplatin resistance in SK-OV-3 ovarian cancer cells and thus may be a potential therapeutic target for the treatment of cisplatin-resistant ovarian cancer.

Original languageEnglish
Pages (from-to)236-243
Number of pages8
JournalBiochimica et Biophysica Acta - Molecular Cell Research
Volume1863
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

Keywords

  • BLT2
  • Chemoresistance
  • Cisplatin
  • Ovarian cancer
  • SK-OV-3 cells
  • STAT-3

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

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