Project description:Background: Lung carcinoma-in-situ (CIS) lesions are the pre-invasive precursor to lung squamous cell carcinoma. However, only half progress to invasive cancer in three years, while a third spontaneously regress. Molecular profiling techniques have identified marked differences between progressive and regressive lesions. Here we present laser-captured stromal tissue, adjacent to previously profiled CIS lesions, to examine the role of the tumour microenvironment in spontaneous lesion regression. All samples in this dataset are paired with matched CIS lesions in dataset GSE108082.
Project description:The mechanisms driving immune evasion in early stage-I high-grade serous ovarian carcinoma (HGSOC) remain poorly understood. To investigate this, we performed single-cell RNA-sequencing analysis. Our findings revealed a highly immunosuppressive HGSOC microenvironment, characterized by the infiltration of regulatory T cells (Tregs). Trajectory analysis uncovered differentiation pathways of naïve Tregs, which either underwent activation and proliferation or experienced transcriptional instability. The predicted network of Treg-cell interactions, including those with tumor cells, facilitate Treg mobility, maturation, and reinforced their immunosuppressive function and persistence. Treg-mediated interactions predict the inhibition of CD8+ T cells and antigen-presenting cells, supporting tumor immune escape. Additionally, we observed that more immunogenic tumor conditions, marked by IFNγ production, likely contributed to Treg destabilization. Our findings underscore the pivotal role of Tregs in early immune evasion and provide valuable insights into potential therapeutic strategies targeting Treg cell activity and differentiation fate.
Project description:This SuperSeries is composed of the following subset Series: GSE41194: Differentially Expressed Genes Regulating the Progression of Ductal Carcinoma In Situ to Invasive Breast Cancer (Group 1) GSE41196: Differentially Expressed Genes Regulating the Progression of Ductal Carcinoma In Situ to Invasive Breast Cancer (Group 2) GSE41197: Differentially Expressed Genes Regulating the Progression of Ductal Carcinoma In Situ to Invasive Breast Cancer (Group 3) GSE41198: Differentially Expressed Genes Regulating the Progression of Ductal Carcinoma In Situ to Invasive Breast Cancer (Group 4 stroma) GSE41227: Differentially Expressed Genes Regulating the Progression of Ductal Carcinoma In Situ to Invasive Breast Cancer (Group 4 Epithelial) Refer to individual Series
Project description:To investigate the mRNA m6A modification profiling in human metastatic ovarian carcinoma and in situ ovarian carcinoma tissue, we performed m6A MeRIP-seq(GenSeq®️ m6A MeRIP Kit) with the total RNA extacted from these tissue samples.