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Project HOPE (High-tech Omics-based Patient Evaluation) has been progressing since its implementation in 2014 using whole-exome sequencing (WES) and gene expression profiling (GEP). With the aim of evaluating immune status in cancer patients, a gene panel consisting of 164 immune response-associated genes (56 antigen-presenting cell and T-cell-associated genes, 34 cytokine- and metabolism-associated genes, 47 TNF and TNF receptor superfamily genes, and 27 regulatory T-cell-associated genes) was established, and its expression and mutation status were investigated using 1,000 cancer patient-derived tumors. Regarding WES, sequencing and variant calling were performed using the Ion Proton system. The average number of single-nucleotide variants (SNVs) detected per sample was 183 ± 507, and the number of hypermutators with more than 500 total SNVs was 51 cases. Regarding GEP, seven immune response-associated genes (VTCN1, IL2RA, ULBP2, TREM1, MSR1, TNFSF9 and TNFRSF12A) were more than 2-fold overexpressed compared with normal tissues in more than 2 organs. Specifically, the positive rate of PD-L1 expression in all patients was 25.8%, and PD-L1 expression was significantly upregulated in hypermutators. The simultaneous analyses of WES and GEP based on immune response-associated genes are very intriguing tools to screen cancer patients suitable for immune checkpoint antibody therapy.

biomedical research

&lt;b&gt;Immune response-associated gene analysis of 1,000 cancer patients using whole-exome sequencing and gene expression profiling—Project &lt;/b&gt;&lt;b&gt;HOPE— &lt;/b&gt;