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Prohibitin as a novel target protein of luteinizing hormone in ovarian epithelial carcinogenesis

L Jia1, X F Yi, Z B Zhang

  • 1Department of Obstetrics and Gynecology, Qilu Shandong University, Jinan 250012, China.

Neoplasma
|February 1, 2011
PubMed

Insights

Luteinizing hormone (LH) up-regulates prohibitin, a protein that decreases with ovarian cancer progression. This suggests LH may inhibit ovarian cancer development and progression.

Area of Science:

  • Endocrinology
  • Oncology
  • Proteomics

Background:

  • The roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in ovarian epithelial carcinoma (OEC) remain unclear.
  • Understanding the molecular mechanisms underlying OEC development is crucial for targeted therapies.

Purpose of the Study:

  • To investigate the relationship between gonadotropins and specific proteins in ovarian epithelial tumor (OET) cells.
  • To identify proteins modulated by LH and FSH and their potential role in OEC pathogenesis.

Main Methods:

  • Proteomic analysis of OET cells treated with gonadotropins.
  • Validation of prohibitin as a target protein using Western blot.
  • Immunohistochemical detection of prohibitin expression in human serous ovarian tumors.

Main Results:

  • LH significantly up-regulated prohibitin expression in OET cells (up to 2.5-fold at 200 mIU/mL).
  • Prohibitin expression decreased progressively from benign serous cystadenomas to borderline tumors and serous carcinomas (P < 0.0001).
  • Significant differences in prohibitin expression were observed between all tumor groups (P < 0.001).

Conclusions:

  • Prohibitin is an LH-associated protein potentially involved in ovarian cancer.
  • LH may exert a protective effect against ovarian cancer development and progression.
  • LH might play an inhibitory role in ovarian tumorigenesis.

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