An integrated genome-wide approach to discover tumor specific antigens as potential immunological and clinical targets in cancer
Menée sur une cohorte de 149 patients atteints d'un cancer du poumon et 123 témoins, cette étude évalue la capacité d'une nouvelle approche pour identifier des antigènes spécifiques des tumeurs susceptibles de servir de cibles cliniques ou immunologiques
Tumor-specific antigens (TSAs) are central elements in the immune control of cancers. To systematically explore the TSA genome, we developed a computational technology called Heterogeneous Expression Profile Analysis (HEPA), which can identify genes relatively uniquely expressed in cancer cells in contrast to normal somatic tissues. Rating human genes by their HEPA score enriched for clinically useful TSA genes, nominating candidate targets whose tumor-specific expression was verified by RT-PCR. Coupled with HEPA, we designed a novel assay termed Protein A/G based Reverse Serological Evaluation (PARSE) for quick detection of serum autoantibodies against an array of putative TSA genes. Remarkably, highly tumor-specific autoantibody responses against seven candidate targets were detected in 4-11% of patients, resulting in distinctive autoantibody signatures in lung and stomach cancers. Interrogation of a larger cohort of 149 patients and 123 healthy individuals validated the predictive value of the autoantibody signature for lung cancer. Together, our results establish an integrated technology to uncover a cancer-specific antigen genome offering a reservoir of novel immunological and clinical targets.
Cancer Research , résumé, 2012