Abstract:
:Anti-Programed Death 1 (PD-1) is standard immunotherapy for multiple cancers, and the expression of one of its ligands, PD-L1, has been described in germ cell tumors (GCT). Neither the clinical activity of anti-PD-1 nor the incidence of an immunoresponsive tumor microenvironment has been described for GCTs. A patient initially diagnosed with melanoma via fine needle aspiration was treated with one dose of antibody to PD-1. A core needle biopsy was subsequently performed to acquire sufficient tissue for molecular analysis, which led to a change in diagnosis to metastatic embryonal carcinoma. The testicular GCT cohort of The Cancer Genome Atlas was analyzed using a T-cell gene signature associated with benefit from immunotherapy. Primary tumors (N = 134) were categorized as high (T-cell-inflamed), medium, or low (non-T-cell-inflamed) by their T-cell signature derived from RNAseq data. Anti-PD-1 induced decreases in serum markers and a 33% reduction in tumor volume. Gene expression revealed a T-cell-inflamed tumor microenvironment in 47% of testicular GCTs, including seminoma (83%) and nonseminoma (17%) tumor subtypes. Expression of alpha-fetoprotein (AFP) RNA correlated with lack of the T-cell signature, with increasing AFP RNA inversely correlating with the inflamed signature and expression of IFNγ-associated genes. These data suggest that GCTs can respond to anti-PD-1 and that gene expression profiling supports investigation of immunotherapy for treatment of GCTs. Cancer Immunol Res; 4(11); 903-9. ©2016 AACR.
journal_name
Cancer Immunol Resjournal_title
Cancer immunology researchauthors
Shah S,Ward JE,Bao R,Hall CR,Brockstein BE,Luke JJdoi
10.1158/2326-6066.CIR-16-0087subject
Has Abstractpub_date
2016-11-01 00:00:00pages
903-909issue
11eissn
2326-6066issn
2326-6074pii
2326-6066.CIR-16-0087journal_volume
4pub_type
杂志文章abstract::Although immune checkpoint blockade (ICB) improves clinical outcome in several types of malignancies, pancreatic ductal adenocarcinoma (PDA) remains refractory to this therapy. Preclinical studies have demonstrated that the relative abundance of suppressive myeloid cells versus cytotoxic T cells determines the efficac...
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