Related Experiment Video
Updated: May 6, 2026

A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer
Published on: March 6, 2018
Cause and consequence of cancer/testis antigen activation in cancer
1Simmons Cancer Center, UT Southwestern Medical Center, Dallas, Texas 75390-8807;
Abstract:
Tumor cells frequently exhibit widespread epigenetic aberrations that significantly alter the repertoire of expressed proteins. In particular, it has been known for nearly 25 years that tumors frequently reactivate genes whose expression is typically restricted to germ cells. These gene products are classified as cancer/testis antigens (CTAs) owing to their biased expression pattern and their immunogenicity in cancer patients. While these genes have been pursued as targets for anticancer vaccines, whether these reactivated testis proteins have roles in supporting tumorigenic features is less studied. Recent evidence now indicates that these proteins can be directly employed by the tumor cell regulatory environment to support cell-autonomous behaviors. Here, we review the history of the CTA field and present recent findings indicating that CTAs can play functional roles in supporting tumorigenesis.
Insights
Tumor cells often reactivate cancer/testis antigens (CTAs), typically found in germ cells. Recent findings show these CTAs may directly support tumor growth and cell-autonomous functions, not just serve as vaccine targets.
Area of Science:
- Oncology
- Epigenetics
- Immunology
Background:
- Tumor cells display epigenetic alterations affecting protein expression.
- Genes normally restricted to germ cells are frequently reactivated in tumors.
- These reactivated genes encode cancer/testis antigens (CTAs), known for immunogenicity.
Purpose of the Study:
- To review the history and current understanding of CTAs.
- To present recent findings on the functional roles of CTAs in tumorigenesis.
- To explore if CTAs support cell-autonomous tumor behaviors.
Main Methods:
- Literature review of CTA field history.
- Analysis of recent research on CTA functional roles.
- Examination of evidence for CTAs in cell-autonomous tumor functions.
Main Results:
- CTAs are frequently expressed in tumors due to epigenetic changes.
- CTAs have been primarily considered as vaccine targets.
- Emerging evidence suggests CTAs actively support tumorigenic features and cell-autonomous behaviors.
Conclusions:
- CTAs are not only immunogenic targets but also functional contributors to cancer.
- Reactivated testis proteins play direct roles in supporting tumor cell regulation.
- Further research into CTA functions is crucial for understanding tumorigenesis.
Related Concept Videos
Cancer-Critical Genes I: Proto-oncogenes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes I: Proto-oncogenes
Mutagenicity and Carcinogenicity
Disorders of the Male Reproductive System
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra....
Cancer Prevention
Some...
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

