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Decreased expression of REIC/Dkk-3 in human renal clear cell carcinoma

Kyouhei Kurose1, Masakiyo Sakaguchi, Yasutomo Nasu

  • 1Department of Urology, Okayama University Graduate School of Medicine and Dentistry and Faculty of Health Sciences, Okayama, Japan.

The Journal of Urology
|February 10, 2004
PubMed
Abstract

Insights

The expression of REIC/Dkk-3 (Reduced Expression in Immortalized Cells/Dickkopf-3) mRNA and protein is significantly decreased in renal clear cell carcinoma (RCCC). This suggests REIC/Dkk-3 is involved in early cancer development and may be a therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Renal clear cell carcinoma (RCCC) is a significant health concern.
  • Identifying novel tumor suppressor genes is crucial for understanding RCCC pathogenesis.
  • REIC/Dkk-3 (Reduced Expression in Immortalized Cells/Dickkopf-3) is a potential tumor suppressor gene.

Purpose of the Study:

  • To investigate the expression levels of REIC/Dkk-3 in RCCC.
  • To evaluate REIC/Dkk-3 as a potential tumor suppressor in RCCC.
  • To characterize a novel antibody for REIC/Dkk-3 protein detection.

Main Methods:

  • Analysis of REIC/Dkk-3 mRNA and protein expression in RCCC cell lines.
  • Utilized real-time quantitative reverse transcriptase-polymerase chain reaction (RT-qPCR) on 17 RCCC tissue pairs.
  • Employed Western blot and immunohistochemical analysis on RCCC surgical specimens.

Main Results:

  • REIC/Dkk-3 mRNA levels were significantly reduced in 15 out of 17 RCCC tissue pairs.
  • REIC/Dkk-3 protein levels were significantly decreased in RCCC tissues (6/7 by Western blot, 13/14 by immunohistochemistry).
  • A novel antibody demonstrated specificity for REIC/Dkk-3 protein.

Conclusions:

  • Downregulation of REIC/Dkk-3 occurs early in RCCC development, irrespective of tumor grade and stage.
  • REIC/Dkk-3 plays a role in the initial stages of malignant transformation in RCCC.
  • REIC/Dkk-3 represents a potential novel molecular target for RCCC therapies.

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