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The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers
12:22

The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers

Published on: January 22, 2013

Expression of thyroid hormone receptors is disturbed in human renal clear cell carcinoma

M Puzianowska-Kuznicka1, A Nauman, A Madej

  • 1Department of Endocrinology, Medical Research Center, Polish Academy of Sciences, Warsaw, Poland.

Cancer Letters
|May 24, 2000
PubMed

Insights

Thyroid hormone receptors (TRs) show altered expression in human renal clear cell carcinoma (RCCC). TRalpha mRNA decreased while TRalpha1 protein increased, suggesting a complex role in RCCC development.

Area of Science:

  • Oncology
  • Endocrinology
  • Molecular Biology

Background:

  • Human renal clear cell carcinoma (RCCC) represents a significant portion of human cancers.
  • Thyroid hormone (T3) and its receptors (TRs) are crucial regulators in cellular processes, but their role in RCCC tumorigenesis is not well understood.

Purpose of the Study:

  • To investigate the expression patterns of thyroid hormone receptors (TRs) at both mRNA and protein levels in RCCC.
  • To determine the potential involvement of TRs in the development and progression of RCCC.

Main Methods:

  • Quantitative analysis of TRalpha and TRbeta mRNA expression using RT-PCR.
  • Western blot analysis to assess TRalpha1 and TRbeta1 protein levels.
  • Comparison of TR expression between RCCC tumor tissues and adjacent healthy kidney tissues.

Main Results:

  • TRalpha mRNA levels were significantly decreased in RCCC tissues compared to healthy tissues, with the most pronounced reduction observed in well-differentiated (G1) tumors.
  • Conversely, TRalpha1 protein was found to be overexpressed (1.6-fold) in RCCC tumors.
  • TRbeta1 mRNA showed variable expression, being overexpressed in 30% and decreased in 70% of tumors, while TRbeta1 protein levels were significantly lower (1.7-fold) in tumors compared to controls.

Conclusions:

  • Thyroid hormone receptors exhibit dysregulated expression in human renal clear cell carcinoma.
  • The contrasting changes in TRalpha mRNA and protein levels suggest complex post-transcriptional regulation or alternative roles in RCCC.
  • These findings indicate a potential role for thyroid hormone signaling in RCCC pathogenesis, warranting further investigation.

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