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A new gene coding for an antigen recognized by autologous cytolytic T lymphocytes on a human renal carcinoma
B Gaugler1, N Brouwenstijn, V Vantomme
1Ludwig Institute for Cancer Research, Brussels Branch, 74 avenue Hippocrate, UCL 7459, B1200 Brussels, Belgium.
Abstract:
Previous reports have described antigens that are recognized on human melanoma cells by autologous cytolytic T lymphocytes (CTL). The genes coding for a number of these antigens have been identified. Here we report the cloning of a gene that codes for an antigen recognized by autologous CTL on a human renal carcinoma cell line. This antigen is presented by HLA-B7 and is encoded by a new gene that we have named RAGE1. No expression of RAGE1 was found in normal tissues other than retina. RAGE1 expression was found in only one of 57 renal cell carcinoma samples, and also in some sarcomas, infiltrating bladder carcinomas, and melanomas. This represents the first identification of an antigen recognized by autologous CTL on a renal tumor.
Insights
Researchers identified a new gene, RAGE1, encoding a renal tumor antigen recognized by autologous cytolytic T lymphocytes (CTL). This discovery offers a potential target for renal cancer immunotherapy.
Area of Science:
- Immunology
- Oncology
- Genetics
Background:
- Autologous cytolytic T lymphocytes (CTL) recognize specific antigens on human melanoma cells.
- Genes encoding several melanoma-associated antigens have been identified.
- Identifying tumor-specific antigens is crucial for developing targeted cancer immunotherapies.
Purpose of the Study:
- To clone and characterize a gene encoding an antigen recognized by autologous CTL on a human renal carcinoma cell line.
- To investigate the expression pattern of this novel antigen in normal and cancerous tissues.
Main Methods:
- Cloning of the gene encoding the renal tumor antigen.
- Antigen presentation analysis by HLA-B7.
- Expression analysis of the gene in various human tissues and cancer samples using molecular techniques.
Main Results:
- A new gene, named RAGE1, was identified, encoding an antigen recognized by autologous CTL on a renal carcinoma cell line.
- The RAGE1 antigen is presented by HLA-B7.
- RAGE1 expression was primarily detected in the retina, with limited expression in one renal cell carcinoma sample, and also observed in some sarcomas, bladder carcinomas, and melanomas.
Conclusions:
- This study reports the first identification of an antigen recognized by autologous CTL on a renal tumor.
- RAGE1 represents a novel renal tumor-associated antigen with potential implications for renal cancer immunotherapy.
- The restricted expression pattern of RAGE1 in normal tissues suggests its potential as a specific target for cancer treatment.