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The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers
Published on: January 22, 2013
Comparative transcriptional and functional profiling of clear cell and papillary renal cell carcinoma
Julia Diegmann1, Stefan Tomiuk, Jimsgene Sanjmyatav
1Core Unit Chip Application (CUCA), Institute of Human Genetics and Anthropology, Friedrich-Schiller-University, 07740 Jena, Germany.
Abstract:
Renal cell carcinoma (RCC) is known to effectively prevent immune recognition. However, little is known about the mechanisms that underlie this phenomenon. Thus, the identification of immunogenic molecules associated with RCC and the elucidation of the corresponding signaling pathways are crucial to the development of effective treatments. We performed transcriptional and functional profiling with cDNA microarrays (1070 cDNA probes) on a total of 17 RCCs, 11 clear cell and 6 papillary, and on corresponding normal tissue. Samples were clustered based on their expression profiles. We found a total of 45 genes to be regulated equally by both tumor types compared to the normal tissue. A set of 13 differentially expressed genes was identified between the examined tumor subtypes. Functional analysis was performed for both gene sets and showed a significant enrichment of cell surface genes regulated in both tumor subtypes. Within these we found five surface marker genes to be upregulated (TNFRSF10B, CD70, TNFR1, PDGFRB, and BAFF) which are involved in immune responses via the regulation of lymphocytes and can also induce apoptosis. Their overexpression in both tumor subtypes suggests a possible involvement in the immune escape strategies of RCC. The combination of transcriptional and functional profiling revealed potential target molecules for novel therapy strategies that must be studied in more detail.
Insights
Renal cell carcinoma (RCC) evades immune detection. Researchers identified upregulated cell surface genes, including TNFRSF10B, CD70, TNFR1, PDGFRB, and BAFF, suggesting novel therapeutic targets for RCC immune escape.
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- Renal cell carcinoma (RCC) effectively prevents immune recognition, but the underlying mechanisms remain largely unknown.
- Identifying immunogenic molecules and signaling pathways in RCC is critical for developing effective treatments.
Purpose of the Study:
- To identify differentially expressed genes and cell surface markers in renal cell carcinoma (RCC) subtypes.
- To investigate the potential role of these markers in RCC immune evasion strategies.
Main Methods:
- Transcriptional and functional profiling using cDNA microarrays on 17 RCC samples (11 clear cell, 6 papillary) and corresponding normal tissues.
- Gene expression analysis, including clustering and differential expression analysis between tumor subtypes and normal tissue.
Main Results:
- Identified 45 equally regulated genes and 13 differentially expressed genes between RCC subtypes compared to normal tissue.
- Functional analysis revealed enrichment of cell surface genes, with five upregulated markers (TNFRSF10B, CD70, TNFR1, PDGFRB, BAFF) involved in immune regulation and apoptosis.
- Overexpression of these surface markers suggests a role in RCC immune escape.
Conclusions:
- Transcriptional and functional profiling identified potential therapeutic targets for RCC.
- Upregulated cell surface markers may be key players in RCC immune evasion and warrant further investigation for novel treatment strategies.
