1. ISG15/GRAIL1/CD3 axis influences survival of patients with esophageal adenocarcinoma.
- Author
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McEwen DP, Ray P, Nancarrow DJ, Wang Z, Kasturirangan S, Abdullah S, Balan A, Hoskeri R, Thomas D, Lawrence TS, Beer DG, Lagisetty KH, and Ray D
- Subjects
- Humans, Male, T-Lymphocytes metabolism, T-Lymphocytes immunology, Female, Gene Expression Regulation, Neoplastic, Barrett Esophagus pathology, Barrett Esophagus genetics, Barrett Esophagus metabolism, Middle Aged, Esophageal Neoplasms genetics, Esophageal Neoplasms mortality, Esophageal Neoplasms pathology, Esophageal Neoplasms metabolism, Esophageal Neoplasms immunology, Adenocarcinoma genetics, Adenocarcinoma mortality, Adenocarcinoma pathology, Adenocarcinoma metabolism, Adenocarcinoma immunology, CD3 Complex metabolism, CD3 Complex genetics, Cytokines metabolism, Ubiquitins metabolism, Ubiquitins genetics
- Abstract
Immunosuppression is a common feature of esophageal adenocarcinoma (EAC) and has been linked to poor overall survival (OS). We hypothesized that upstream factors might negatively influence CD3 levels and T cell activity, thus promoting immunosuppression and worse survival. We used clinical data and patient samples of those who progressed from Barrett's to dysplasia to EAC, investigated gene (RNA-Seq) and protein (tissue microarray) expression, and performed cell biology studies to delineate a pathway impacting CD3 protein stability that might influence EAC outcome. We showed that the loss of both CD3-ε expression and CD3+ T cell number correlated with worse OS in EAC. The gene related to anergy in lymphocytes isoform 1 (GRAIL1), which is the prominent isoform in EACs, degraded (ε, γ, δ) CD3s and inactivated T cells. In contrast, isoform 2 (GRAIL2), which is reduced in EACs, stabilized CD3s. Further, GRAIL1-mediated CD3 degradation was facilitated by interferon-stimulated gene 15 (ISG15), a ubiquitin-like protein. Consequently, the overexpression of a ligase-dead GRAIL1, ISG15 knockdown, or the overexpression of a conjugation-defective ISG15-leucine-arginine-glycine-glycine mutant could increase CD3 levels. Together, we identified an ISG15/GRAIL1/mutant p53 amplification loop negatively influencing CD3 levels and T cell activity, thus promoting immunosuppression in EAC.
- Published
- 2024
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