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Sphingosine kinase 1 as a potential therapeutic target in epithelial ovarian cancer

Jeong-Won Lee1, Ji-Yoon Ryu, Gun Yoon

  • 1Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

International Journal of Cancer
|November 29, 2014
PubMed

Insights

Targeting sphingosine kinase 1 (SK1) with inhibitors effectively reduced tumor growth, proliferation, and invasion while increasing apoptosis in epithelial ovarian carcinoma (EOC) models. This highlights SK1 as a promising therapeutic target for EOC treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Sphingosine kinase 1 (SK1) is over-expressed in various human cancers, promoting tumor growth.
  • SK1 is recognized as a potential therapeutic target for cancer treatment.

Purpose of the Study:

  • To investigate the therapeutic potential of inhibiting SK1 in epithelial ovarian carcinoma (EOC).
  • To evaluate the effects of SK1 inhibition on EOC cell proliferation, apoptosis, angiogenesis, and invasion, both in vitro and in vivo.

Main Methods:

  • Utilized SK1 siRNA and inhibitors (including FTY720) in multiple EOC cell lines (chemosensitive and chemoresistant).
  • Assessed cellular effects using MTT, FACS, ELISA, and wound-healing assays.
  • Conducted in vivo studies using orthotopic mouse xenografts and a patient-derived xenograft (PDX) model.

Main Results:

  • SK1 inhibition significantly reduced proliferation, angiogenesis, and invasion across all tested EOC cell lines.
  • SK1 inhibition led to increased apoptosis in EOC cells.
  • In vivo, FTY720 treatment significantly decreased tumor weight in xenograft and PDX models.

Conclusions:

  • Targeting SK1 is a viable therapeutic strategy for epithelial ovarian carcinoma.
  • SK1 inhibition demonstrates efficacy in reducing tumor growth and related processes in EOC.
Keywords:
epithelial ovarian cancersphingosine kinase 1targeted therapytherapeutic target

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