Abstract:
Importance:Checkpoint blockade therapy targeting cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) and the programmed cell death protein 1 pathways (PD-1/PD-L1) have achieved success in treating a number of malignancies. However, only a subset of patients responds to these therapies, and optimization of patient selection for treatment is imperative to avoid adverse effects without clinical benefit and keep costs manageable. Observations:The past few years have witnessed checkpoint inhibition becoming a first-line treatment option with US Food and Drug Administration approvals for various tumor types. Genomic analyses (whole genome, exome, and transcriptome) have been instrumental in identifying a genetic profile associated with sensitivity to checkpoint inhibitors. Therapy outcome is determined at various levels: (1) the degree of tumor "foreignness," as reflected by mutational burden and expression of viral genes, (2) the composition and activity of a preexisting immune infiltrate, and (3) mechanisms of tumor escape from immune surveillance. In addition, there are opportunities for genomic analyses of genetic polymorphisms and the gut microbiome that may be associated with clinical response to therapy. Conclusions and Relevance:Genomics provides powerful tools for the identification of biomarkers for response to immune checkpoint blockade, given their potential to analyze multiple parameters simultaneously in an unbiased manner. This offers the opportunity for genomics- and transcriptomics-based selection of patients for rationally designed therapy with immune checkpoint inhibitors.
journal_name
JAMA Oncoljournal_title
JAMA oncologyauthors
Dijkstra KK,Voabil P,Schumacher TN,Voest EEdoi
10.1001/jamaoncol.2016.2214subject
Has Abstractpub_date
2016-11-01 00:00:00pages
1490-1495issue
11eissn
2374-2437issn
2374-2445pii
2542339journal_volume
2pub_type
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