Abstract
Epstein-Barr virus-induced gene 3 (EBI3) is an immunomodulatory protein-coding gene. So far, the prognostic role of EBI3 in human metastatic melanoma has been unclear. This study aimed to evaluate the EBI3 expression as a potential biomarker using the public database with tumor-infiltrating lymphocytes (TILs) data. Survival analyses were performed in the database of The Cancer Genome Atlas (TCGA) and GSE65904, GSE19234, GSE22153, and GSE22154. The mRNA levels, the distribution pattern of TILs, and the estimated fractions of TILs from the TCGA database were integrated. Higher EBI3 expression in tumors was significantly associated with longer overall survival in TCGA and the other independent cohorts. Interestingly, the patients with high EBI3 expression had a brisk pattern of TILs and increased CD8+ T cells over regulatory T cells with less pigmentation-related gene expressions. EBI3 could serve as a novel biomarker in metastatic melanoma with a favorable TILs profile.
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