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Tumor Biology

, Volume 37, Issue 8, pp 11469–11477 | Cite as

Galectin-3 regulates metastatic capabilities and chemotherapy sensitivity in epithelial ovarian carcinoma via NF-κB pathway

  • Huaiwu Lu
  • Yunyun Liu
  • Dongyan Wang
  • Lijuan Wang
  • Hui Zhou
  • Guocai Xu
  • Lingling Xie
  • Miaofang Wu
  • Zhongqiu Lin
  • Yuefei Yu
  • Guorong Li
Original Article

Abstract

Galectin-3 (Gal-3) has been found to be involved in the tumor progression and chemoresistance of epithelial ovarian cancer (EOC). Some studies have shown that Gal-3 may interact with nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB). However, it is unclear whether the effects of Gal-3 on the metastasis and chemosensitivity of EOC are related to NF-κB. In this study, we aimed to explore whether Gal-3 promoted progression and carboplatin resistance in EOC via NF-κB pathway. Plasmid transfection and RNA interference were used to upregulate or downregulate the expression of Gal-3 in ovarian cancer cell lines. Then, the expression of Gal-3 and the protein expressions of phosphorylation NF-κB pathway molecules were further detected by Western blot. Transwell migration assay was employed to detect the effects of Gal-3 on the migration and invasion of ovarian cancer cell lines. After treatment with carboplatin, flow cytometry (FCM) was employed to detect the effects of Gal-3 on carboplatin-induced apoptosis. Immunofluorescence technique was used to examine the translocation of phosphorylated P65 into the nucleus in ovarian cancer cells after the upregulation of Gal-3. After the knockdown of Gal-3 by small interfering RNA (siRNA), the migration and the invasion of cancer cells were significantly inhibited while the apoptosis and the sensitivities to carboplatin increased. Western blot showed reduction in the phosphorylation components of the NF-κB pathway: inhibitor of kappa B (IκB), IκB kinase (IKK), and P65. However, after the Gal-3 upregulation by plasmid transfection, the capabilities of migration and invasion of cancer cells were significantly promoted while the apoptosis and the sensitivities to carboplatin decreased. Immunofluorescence showed increased nuclear translocation of P65. Inhibitors of the NF-κB pathway did not affect the Gal-3 expression level in ovarian cancer cells. Gal-3 may affect the migratory and invasive capabilities of cancer cells as well as the chemosensitiviy to carboplatin in EOC by acting through the NF-κB pathway.

Keywords

Galectin-3 NF-κB Pathway Epithelial ovarian cancer Carboplatin chemoresistance 

Notes

Acknowledgments

This work was supported by Science and Technology Planning Project of Guangdong Province, China. The grant number is 2013B021800234.

Compliance with ethical standards

Conflicts of interest

None

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2016

Authors and Affiliations

  • Huaiwu Lu
    • 1
  • Yunyun Liu
    • 1
  • Dongyan Wang
    • 1
  • Lijuan Wang
    • 1
  • Hui Zhou
    • 1
  • Guocai Xu
    • 1
  • Lingling Xie
    • 1
  • Miaofang Wu
    • 1
  • Zhongqiu Lin
    • 1
  • Yuefei Yu
    • 2
  • Guorong Li
    • 3
    • 4
  1. 1.Department of Gynecologic OncologySun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhouChina
  2. 2.Ameritech Biomedicines, Inc.HoustonUSA
  3. 3.Inserm U1059Saint-EtienneFrance
  4. 4.CHU Saint-Etienne, Plateau de BiologieSaint-EtienneFrance

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