PRF1 and gastric cancer: Analysis of the expression patterns of selected cytokine and chemokine mRNAs in 299 GC samples unveiled CXCL9, CXCL10, GZMA, GZMB, PRF1, CD8A, IFNG, TBX2, and TNF as immune activation-related transcripts (IATs), serving as robust statistical parameters for prognostic assessments in GC patients (10).