NCI Study Finds Cancer Immunotherapy Genes
A National Cancer Institute study has identified more than 100 genes that may play a role in facilitating tumor destruction by T cells. The researchers published their findings online 8/7 in Nature. A news release says since some tumor cells are resistant to T cell attack, the researchers wanted to identify the cancer cell genes that are necessary for them to be killed by T cells.
One gene associated with tumor cytolytic activity was APLNR. The study says the product of this gene is a protein called the apelin receptor. Although it had been suspected to contribute to development of some cancers, this was the first indication of a role in response to T cells. The release says that further investigation of tumors from patients resistant to immunotherapies showed that the apelin receptor protein was nonfunctional in some of them, indicating that the loss of this protein may limit the response to immunotherapy treatment.
Study authors say that if scientists can understand mechanisms of resistance to immunotherapy, they might be able to develop new therapeutics that can circumvent the escape mechanisms of tumor cells and help patients experience complete responses.