4 results for "EGAS50000000809"

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• WES dataset of salivary gland tumor samples and control blood samples

  This dataset contains paired-end WES data of salivary gland tumor samples and control blood samples from 53 patients. Sequencing was performed on Illumina HiSeq 2500, HiSeq 4000 or NovaSeq 6000.

  Dataset EGAD50000001190

• RNA-seq dataset of salivary gland tumor samples

  This dataset contains paired-end RNA-seq data of salivary gland tumor samples from 94 patients. Sequencing was performed on Illumina HiSeq 2500, HiSeq 4000, HiSeq X Ten or NovaSeq 6000.

  Dataset EGAD50000001191

• WGS dataset of salivary gland tumor samples and control blood samples

  This dataset contains paired-end WGS data of salivary gland tumor samples and control blood samples from 50 patients. Sequencing was performed on Illumina HiSeq 2500, HiSeq 4000, HiSeq X Ten or NovaSeq 6000.

  Dataset EGAD50000001192

• Integrative analysis reveals a macrophage-predominant, immunosuppressive immune microenvironment and subtype-specific therapeutic vulnerabilities in advanced salivary gland cancer

  Background Salivary gland cancers (SGC) are rare and heterogeneous malignant tumors. Advanced SGC lack established treatment options and show poor response to immunotherapy. Here, an integrative multi-omics analysis in a large cohort of advanced SGC revealed insights into the tumor immune microenvironment (TIM) and distinct mechanisms of immune evasion. Methods A total of 104 patients with recurrent/metastatic SGC from the DKTK MASTER program were included in this study. Whole-exome or whole-genome sequencing and RNA-sequencing was performed on fresh frozen tumor tissue. The tumor immune microenvironment was analyzed using CIBERSORT deconvolution analysis and immune gene expression scores in bulk RNA-sequencing data. Single-nuclei sequencing and immunohistochemistry analyses were performed in selected samples. Results were validated in bulk RNA-sequencing data of a previously published independent dataset. Results Bulk transcriptome analysis revealed an immune-deserted TIM in the majority of advanced SGC samples. Immune exclusion was most prominent in adenoid cystic carcinoma (ACC) subgroup 1 exhibiting a downregulation of the antigen processing machinery. Only a small subset of advanced SGC, including few adenoid cystic carcinoma, exhibited T-cell inflammation, which was correlated with tumor mutational burden in Non-ACC samples. Subtype specific expression of immune checkpoints as well as cancer testis antigens were identified with prominent expression of VTCN1 in luminal cells within ACC. Single-cell RNA-sequencing and bulk RNA-seq deconvolution analysis validated immune cell exclusion and revealed a TIM that was dominated by M2 macrophages across SGC subtypes. Among evaluable patients treated with immune checkpoint inhibitors, a high T-cell to macrophage ratio was associated with clinical benefit. Conclusions These data support biomarker-based development of immune-checkpoint inhibition and the development of novel immune-checkpoint inhibitors and cellular therapies in SGC.

  Study EGAS50000000809