Project description:Adenoid cystic carcinoma (ACC) is an uncommon malignant neoplasm (incidence of 0.35 per 100,000) that occurs in different body sites. It most often arises in salivary glands and other secretory glands in the head and neck region. To find the gene expression signatures of ACC, we performed microarray experiments to compare ACC xenograft tumor models and normal tissue samples. We used microarrays to detail the global program of gene expression underlying adenoid cystic carcinoma and identified distinct classes of up- and down-regulated genes compared to non-neoplastic salivary tissue.
Project description:Adenoid cystic carcinoma (ACC) is an uncommon malignant neoplasm (incidence of 0.35 per 100,000) that occurs in different body sites. It most often arises in salivary glands and other secretory glands in the head and neck region. To find the gene expression signatures of ACC, we performed microarray experiments to compare ACC xenograft tumor models and normal tissue samples. We used microarrays to detail the global program of gene expression underlying adenoid cystic carcinoma and identified distinct classes of up- and down-regulated genes compared to non-neoplastic salivary tissue. Viable tumor tissue samples from human patients were used to establish xenograft tumor models in nude/nude immunodeficient mice. Tissue from these tumor models were compared to tissue samples of normal human salivary glands. Tissue samples were frozen, examined by cryostat histologic sectioning and macrodissected to obtain samples that represented at least 70% epithelial cells.
Project description:Lung metastasis is a major factor affecting long-term survival in adenoid cystic carcinoma patients. Here, we report the long noncoding RNA (lncRNA) MRPL23 antisense RNA 1 (MRPL23-AS1), which exhibited remarkably upregulated expression and was correlated with lung metastasis and overall survival in salivary adenoid cystic carcinoma (SACC) patients. To further study which biological process MRPL23-AS1 may be involved in, SACC-83 cells treated with the control vector or MRPL23-AS1-overexpressing vector were subjected to an mRNA microarray. GO analysis was used to identify the significant biological functions of differentially expressed mRNAs.
Project description:Lung metastasis is a major factor affecting long-term survival in adenoid cystic carcinoma patients. Here, we report the long noncoding RNA (lncRNA) MRPL23 antisense RNA 1 (MRPL23-AS1), which exhibited remarkably upregulated expression and was correlated with lung metastasis and overall survival in salivary adenoid cystic carcinoma (SACC) patients. To further study which biological process MRPL23-AS1 may be involved in, SACC-LM cells treated with si-control or si-MRPL23-AS1 were subjected to an mRNA microarray. GO analysis was used to identify the significant biological functions of differentially expressed mRNAs.
Project description:Salivary gland cancers are rare, diverse malignancies characterized by poor response to immunotherapy. The tumor immune environment in these cancers remains poorly understood. To address this, we perform an integrative analysis of the tumor immune microenvironment in a large cohort of advanced salivary gland cancer samples. Most tumors exhibit low immune activity with limited immune cell infiltration. Inflammation is linked to higher tumor mutational burden in non-adenoid cystic carcinoma histologies. Subtype specific expression of immune checkpoints is identified with prominent expression of VTCN1 in luminal-like cells within adenoid cystic carcinoma. Macrophages with immunosuppressive properties dominate the immune microenvironment across subtypes. Responses to immunotherapy are limited and associated with a higher ratio of T-cells relative to macrophages in individual cases, warranting further investigation. Here, we show an immunosuppressive environment in salivary gland cancers and identify subtype-specific immune vulnerabilities that could inform tailored therapeutic strategies.
Project description:Salivary gland cancers are rare, diverse malignancies characterized by poor response to immunotherapy. The tumor immune environment in these cancers remains poorly understood. To address this, we perform an integrative analysis of the tumor immune microenvironment in a large cohort of advanced salivary gland cancer samples. Most tumors exhibit low immune activity with limited immune cell infiltration. Inflammation is linked to higher tumor mutational burden in non-adenoid cystic carcinoma histologies. Subtype specific expression of immune checkpoints is identified with prominent expression of VTCN1 in luminal-like cells within adenoid cystic carcinoma. Macrophages with immunosuppressive properties dominate the immune microenvironment across subtypes. Responses to immunotherapy are limited and associated with a higher ratio of T-cells relative to macrophages in individual cases, warranting further investigation. Here, we show an immunosuppressive environment in salivary gland cancers and identify subtype-specific immune vulnerabilities that could inform tailored therapeutic strategies.