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Loss of the mitochondrial pyruvate carrier promotes stem cell gene expression in colon adenomas.

ABSTRACT: Loss of the mitochondrial pyruvate carrier promotes stem cell gene expression in AOMDSS colon adenomas, though loss of Apc promotes a more unified pehnotype.

ORGANISM(S): Mus musculus

PROVIDER: GSE136710 | GEO | 2019/09/02

REPOSITORIES: GEO

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Loss of the mitochondrial pyruvate carrier promotes stem cell gene expression in colon adenomas.

Project description:Loss of the mitochondrial pyruvate carrier promotes stem cell gene expression in colon adenomas.

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Mitochondrial carrier homolog 2 (MTCH2) regulates the differentiation of AML cells by controlling pyruvate entry into the mitochondria, nuclear localization of pyruvate dehydrogenase complex and H3 and H4 histone acetylation

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Mitochondrial Pyruvate Carrier 1 (MPC1) enforces T cell homeostasis by enabling pyruvate oxidation in the mitochondria

Project description:The transporter which uptakes pyruvate into the mitochondria during pyruvate oxidation, called the Mitochondrial Pyruvate Carrier (MPC), was only recently identified. While the MPC has been studied in a variety of cell types, including cancer cells and stem cells, very little is known about the importance of MPC in immune cells. Here, we delete MPC from hematopoietic cells and measure its impact on T cell gene expression.

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DNA copy number changes in colorectal flat adenomas

Project description:Background & aim: Flat adenomas form a specific phenotype of colorectal adenomas that has been associated with more severe molecular changes and consequently a more aggressive clinical behavior compared to their polypoid counterparts. In the present study we set out to compare one of the molecular changes most explicitly associated with adenoma to carcinoma progression, i.e. chromosomal instability, between flat and polypoid colorectal adenomas. Methods: Consecutive series of 83 flat and 35 polypoid adenomas were analyzed for DNA copy number changes using a high resolution arrayCGH platform as well as for mutations in the adenomatous polyposis coli (APC) gene. Gene ontology on the genes located on the significantly different regions was performed. Results: Overall, flat adenomas show similar DNA copy number changes as polypoid adenomas. Patterns of DNA copy number changes differed between the two phenotypes with significantly more frequently loss of 5q14.3 and 5q15-q23.3 in flat adenomas, while loss of 1p36.32-p35.3, 10q25.2-q25.3, 17p12 and chromosome 18 were more frequent in polypoid adenomas. The 5q15-q23.3 region harbors the APC locus, therefore mutation status of APC was investigated, showing significantly less mutations in flat adenomas. Pathway analysis and datamining linked the 5q region to inflammation. Conclusion: These results provide evidence that flat and polypoid adenomas have partly overlapping DNA copy number changes, while alterations more specific to flat adenomas have associations with inflammation. Loss of 5q has been associated with aggressive behavior and this could serve as an explanation for a more aggressive clinical behavior of flat lesions.

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DNA copy number changes in colorectal flat adenomas

2012-10-04 | E-GEOD-30479 | biostudies-arrayexpress

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Project description:Effector CD8+ T cells engage glycolysis for both lactate fermentation and pyruvate oxidation, the latter requiring the mitochondrial pyruvate carrier (MPC). How mitochondrial pyruvate metabolism impacts T cell function and fate, remains incompletely understood. We found that genetic deletion of MPC drives CD8+ T cell differentiation towards a memory phenotype. Metabolic flexibility induced by MPC inhibition in a nutrient-rich environment allowed for increased acetyl-coenzyme-A production by glutamine and fatty acid oxidation. This correlated with histone acetylation and chromatin accessibility on pro-memory genes. However, in a nutrient-deprived tumor microenvironment, MPC is essential for sustaining lactate oxidation that limits the metabolic suppression of CD8+ T cell anti-tumor function. To optimally translate these findings, we used a small molecule MPC inhibitor to imprint a stable memory phenotype during chimeric antigen receptor (CAR) T manufacturing, and demonstrated that infusing metabolically conditioned MPC WT CAR T cells resulted in superior and long-lasting anti-tumor activity.

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ATAC-sequencing of primary basal-derived mouse prostate organoids treated with vehicle, the mitochondrial pyruvate carrier inhibitor UK5099, or lactate supplementation

Project description:The goal of this study was to understand how the mitochondrial pyruvate carrier inhibitor,UK5099, and lactate supplementation alter chromatin accessibility in primary basal-derived mouse prostate organoids.

2023-09-01 | GSE221442 | GEO

Mitochondrial Pyruvate Carrier 1 (MPC1) enforces T cell homeostasis by enabling pyruvate oxidation in the mitochondria

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Genome-wide mapping of Rad21 binding sites and gene expression profiling in wild type mouse small intestinal epithelial crypts and Apc Min adenomas

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