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Expressions of cancer-testis antigens in human hepatocellular carcinomas
1Department of Internal Medicine, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, Taiwan.
Abstract:
Though regular sonographic examination can early detect small hepatocellular carcinoma, the therapeutic results remains unsatisfactory. Antigen-specific immunotherapy is an alternative approach for controlling tumors. The prerequisite for antigen-specific cancer immunotherapy is the identification of appropriate tumor antigens. Recently, a new category of tumor-specific shared antigens, called cancer-testis antigens, has been identified. The cancer-testis antigens have been found in a variety of cancers. However, the expression of cancer-testis antigens in human hepatocellular carcinomas is unknown. The aim of this current study is to investigate the expression of cancer-testis antigens in human hepatocellular carcinomas. Reverse-transcription polymerase chain reaction (RT-PCR) was used to investigate the expression of the SSX-1,-2,-4,-5, SCP-1, NY-ESO-1 genes in tumorous and corresponding non-tumorous liver tissues. In the 30 hepatocellular carcinomas studied, SSX-1,-2,-4,-5, SCP-1, and NY-ESO-1 mRNA expressions were detected in 24 (80%), 14 (46.7%), 22 (73.3%), 10 (33.3%), 2 (6.7%), and 11 (36.7%), respectively. Expressions of these genes were detected in few non-tumor liver tissues. The cancer-testis antigens are expressed in a high percentage of hepatocellular carcinomas. These cancer-testis antigen gene products are potential targets for antigen-specific immunotherapy of hepatocellular carcinoma.
Insights
Cancer-testis antigens are expressed in most hepatocellular carcinomas, offering new targets for immunotherapy. This study investigated these antigens in liver cancer tissues, finding significant expression.
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- Hepatocellular carcinoma (HCC) diagnosis is improving, but treatment outcomes remain poor.
- Antigen-specific immunotherapy presents a promising alternative for cancer treatment.
- Identifying specific tumor antigens is crucial for developing effective immunotherapies.
Purpose of the Study:
- To investigate the expression of cancer-testis antigens (CTAs) in human hepatocellular carcinomas.
- To determine if CTAs are suitable targets for antigen-specific immunotherapy in HCC.
Main Methods:
- Reverse-transcription polymerase chain reaction (RT-PCR) was employed.
- Gene expression of SSX-1, SSX-2, SSX-4, SSX-5, SCP-1, and NY-ESO-1 was analyzed.
- Expression levels were compared between tumorous and non-tumorous liver tissues from 30 HCC patients.
Main Results:
- High mRNA expression rates for SSX-1 (80%), SSX-4 (73.3%), and SSX-2 (46.7%) were observed in HCC tissues.
- NY-ESO-1 (36.7%), SSX-5 (33.3%), and SCP-1 (6.7%) also showed detectable expression.
- Minimal CTA gene expression was found in non-tumorous liver tissues, indicating tumor specificity.
Conclusions:
- Cancer-testis antigens are frequently expressed in hepatocellular carcinoma.
- These CTAs represent potential therapeutic targets for antigen-specific immunotherapy in HCC patients.
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