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Updated: May 28, 2026

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

Tyrosine kinase expression profile in clear cell renal cell carcinoma

Turang E Behbahani1, Claudia Thierse, Claudia Baumann

  • 1Klinik und Poliklinik für Urologie und Kinderurologie, Universitätsklinikum Bonn, Sigmund-Freud-Strasse 25, Bonn, Germany.

World Journal of Urology
|October 5, 2011
PubMed
Abstract

Insights

Tyrosine kinases (TK) show altered expression in clear cell renal carcinoma (ccRCC). ERBB4 and HCK were significantly downregulated in ccRCC, indicating their potential as therapeutic targets.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Clear cell renal carcinoma (ccRCC) is the most common subtype of kidney cancer.
  • Understanding the molecular mechanisms, including protein expression patterns, is crucial for developing targeted therapies.
  • Tyrosine kinases (TKs) play significant roles in cell signaling pathways implicated in cancer development and progression.

Purpose of the Study:

  • To comprehensively profile the expression patterns of various tyrosine kinases (TKs) in ccRCC.
  • To identify specific TKs that are differentially expressed in ccRCC compared to normal renal tissue.
  • To investigate the potential of these TKs as therapeutic targets for ccRCC treatment.

Main Methods:

  • Analysis of mRNA expression levels for 89 TKs in ccRCC and normal renal tissues using TaqMan Low-Density Array.
  • Validation of aberrant TK expressions using quantitative real-time PCR (qRT-PCR).
  • Confirmation of protein expression levels for ERBB4 and HCK via immunohistochemistry.

Main Results:

  • Twelve TKs were significantly upregulated in ccRCC, while seven TKs, including ERBB4 and PDGFRA, were downregulated.
  • Validation by qRT-PCR confirmed the differential expression of several TKs.
  • Immunohistochemistry showed significantly lower ERBB4 and HCK protein expression in ccRCC compared to other renal tumor subtypes and normal tissue.

Conclusions:

  • Tyrosine kinases represent promising targets for pharmaceutical anti-cancer therapy in ccRCC.
  • Significantly reduced expression of ERBB4 and HCK in renal cancer tissues suggests their potential as biomarkers or therapeutic targets.
  • Further research into the functional roles of ERBB4 and HCK in ccRCC pathogenesis is warranted.

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