Similar Datasets
Project description:Gene expression in Aim2 (B6) knockout mice or F1 littermate Aim2 wild type controls
| PRJNA735764 | ENA
Project description:We identified that AIM2 protected against MOG-induced EAE, and AIM2 deficiency in microglia promoted the development of EAE. The purpose of this experiment was to identify how AIM2 protected against MOG-induced EAE.
2020-06-03 | GSE151636 | GEO
Project description:Absent in Melanoma 2 (AIM2) is a member of the HIN-200 family of hematopoietic, IFN-inducible nuclear proteins associated with infection defense and tumor pathology. Recently, AIM2 was found to act as a DNA sensor in innate immunity. In addition, a high frequency of AIM2-alterations was observed in microsatellite unstable tumors. To elucidate AIM2 function in colorectal tumors, we here addressed AIM2-responsive genes by microarray. Among genes up-regulated by AIM2, there were a number of interferon-stimulated genes (ISGs: IFIT1, IFIT2, IFIT3, IFI6, IRF7, ISG15, HLA-DRA, HLA-DRB, TLR3 and CIITA) as well as genes involved in intercellular adhesion and matrix remodeling. Expression of ISGs correlated with expression of AIM2 in ten different IFN-γ treated colorectal cancer cell lines. Moreover, knock-down of AIM2 resulted in reduced expression of HLA-DRA, HLA-DRB, and CIITA in IFN-γ treated cells. IFN-γ independent induction of HLA-DR genes and their encoded proteins was also demonstrated upon transient induction of AIM2. STAT-signaling was not involved in IFN-γ independent induction of ISGs, arguing against participation of cytokines released in an autocrine manner. Our data indicate that AIM2 mediates IFN-γ dependent and independent induction of several Interferon stimulated genes (ISGs) including genes encoding the MHC II antigens HLA-DRα and β. we used microarray techniques to define genes responsive to AIM2 expression in colorectal tumor cells. HCT116 is a colorectal tumour cell line with no evidence for AIM2 expression which served as background for gene transfection. B8 and D1 were transfected subclones with persisting expression of AIM2. Gene expression of B8 and D1 was compared with that of mock transfected control cells.
2012-12-13 | E-GEOD-24155 | biostudies-arrayexpress
Project description:Absent in Melanoma 2 (AIM2) is a member of the HIN-200 family of hematopoietic, IFN-inducible nuclear proteins associated with infection defense and tumor pathology. Recently, AIM2 was found to act as a DNA sensor in innate immunity. In addition, a high frequency of AIM2-alterations was observed in microsatellite unstable tumors. To elucidate AIM2 function in colorectal tumors, we here addressed AIM2-responsive genes by microarray. Among genes up-regulated by AIM2, there were a number of interferon-stimulated genes (ISGs: IFIT1, IFIT2, IFIT3, IFI6, IRF7, ISG15, HLA-DRA, HLA-DRB, TLR3 and CIITA) as well as genes involved in intercellular adhesion and matrix remodeling. Expression of ISGs correlated with expression of AIM2 in ten different IFN-γ treated colorectal cancer cell lines. Moreover, knock-down of AIM2 resulted in reduced expression of HLA-DRA, HLA-DRB, and CIITA in IFN-γ treated cells. IFN-γ independent induction of HLA-DR genes and their encoded proteins was also demonstrated upon transient induction of AIM2. STAT-signaling was not involved in IFN-γ independent induction of ISGs, arguing against participation of cytokines released in an autocrine manner. Our data indicate that AIM2 mediates IFN-γ dependent and independent induction of several Interferon stimulated genes (ISGs) including genes encoding the MHC II antigens HLA-DRα and β. we used microarray techniques to define genes responsive to AIM2 expression in colorectal tumor cells.
2012-12-13 | GSE24155 | GEO
Project description:The inflammasome initiates innate defense and inflammatory response by activating caspase-1 and pyroptotic cell death in myeloid cells1,2. It is comprised of an innate immune receptor/effector, pro-caspase-1 and a common adaptor molecule, ASC (apoptotic speck-containing protein with a CARD). Consistent with their pro-inflammatory function, inflammasome components including caspase-1, ASC and NLRP3, are known to exacerbate autoimmunity during experimental autoimmune encephalomyelitis (EAE) by enhancing IL-1 and IL-18 secretion in myeloid cells3-6. Here we show an unexpected function of a DNA-binding inflammasome effector, AIM2 (Absent in Melanoma 2)7-10, in restraining autoimmunity by performing EAE in both whole body and Treg-specific deletion of Aim2–/– mice. AIM2 is highly expressed by human and mouse Treg cells and it is essential to attenuate EAE. RNA-seq, biochemical and metabolic analyses revealed that AIM2 attenuates mTOR, Myc and immune-metabolic functions in both Treg cells isolated in vivo and Treg cells induced in vitro with TGF-. Importantly, we found AIM2 physically interacted with RACK1 in Treg cells to facility the PP2A/RACK1/Akt-mTOR signaling, which is identified as a central component downstream of AIM2 that controls Treg cell function and stability. While AIM2 is generally accepted as an inflammasome effector in myeloid cells, this report reveals a previously unappreciated T cell-intrinsic role of AIM2 in maintaining Treg cell function to restrain autoimmunity. This is achieved by diminishing Akt-mTOR signaling to regulate Treg stability under inflammation, and altering immune-metabolism in Treg cells.
2021-01-27 | PXD018638 | Pride
Project description:Absent in melanoma 2 (AIM2) is a cytosolic dsDNA sensor that has been broadly studied for its role in inflammasome assembly and innate immune defense against intracellular pathogens. However, very little is known about the function of AIM2 in adaptive immune cells. The purpose of this study was to investigate whether AIM2 has a cell-intrinsic role in CD4+ T cell differentiation or function. We found that AIM2 is expressed in both human and mouse CD4+ T cells and that its expression is affected by T cell receptor (TCR) activation. AIM2-deficient (Aim2-/-) mouse CD4+ T cells upregulate the expression of regulatory T cell (Treg)-associated genes, both in unstimulated conditions and after TCR activation. Naïve CD4+ T cells from Aim2-/- mice also show a higher tendency to differentiate into FOXP3+ cells in vitro, while their capacity to differentiate into Th1 or Th17 cells remains unaltered. In agreement with these data, in a T cell transfer model of colitis, Aim2-/- naïve T cells induce ameliorated disease and also display a higher ability to differentiate into FOXP3+ cells. Our results suggest that AIM2 negatively regulates FOXP3 expression and Treg cell differentiation. We show that AIM2 function is not confined to innate immune cells but is also important in adaptive CD4+ T cells. Our data identify AIM2 as a regulator of Treg cell differentiation and therefore as a potential intervention target for restoring T cell homeostasis.
2023-05-26 | GSE151782 | GEO
Project description:Colorectal cancer is a leading cause of cancer-related deaths. Mutations in the innate immune receptor AIM2 are frequently identified in patients with colorectal cancer, but how AIM2 modulates colonic tumorigenesis is unknown. Here, we found that Aim2-deficient mice were hypersusceptible to colonic tumor development. Production of inflammasome-associated cytokines and other inflammatory mediators were largely intact in Aim2-deficient mice, however, intestinal stem cells were prone to uncontrolled proliferation. Aberrant Wnt signaling expanded a population of tumor-initiating stem cells in the absence of AIM2. Susceptibility of Aim2-deficient mice to colorectal tumorigenesis was enhanced by a dysbiotic gut microbiota, which was reduced by reciprocal exchange of gut microbiota with wild-type healthy mice. These findings uncover a synergy between a specific host genetic factor and gut microbiota in determining the susceptibility to colorectal cancer. Therapeutic modulation of AIM2 expression and microbiota has the potential to prevent colorectal cancer. We used microarrays to compare the transcriptome Aim2 deficent mice to wild type mice in colon tumor and colitis samples. Here were 12 mice in total, 3 for each genotype and tissue combination.
2015-07-15 | E-GEOD-69436 | biostudies-arrayexpress
Project description:It was shown that the AIM2 expression was decreased in human HCC tissues compared with the adjacent normal tissues, and the OS rate of HCC patients with higher AIM2 expression was significantly higher compared with the ones with lower AIM2 expression, indicating that the expression level of AIM2 was significantly correlated with clinical stage. Besides, the expression of AIM2 was significantly associated with the AFP expression, but not associated with PD-L1, Ki67, or CD34 expression in HCC. Pathology classification in HCC tissues could be used as an independent prognostic predictor for the patients. Overexpression of AIM2 could significantly inhibit cancer cell migration and promote their apoptosis. Furthermore, notch signaling pathway may be involved in the regulation of AIM2 in the cellular network of HCC cells.
2022-02-28 | GSE197179 | GEO
Project description:Analysis of ALR-deficient cells indicates that ALRs are not required for the IFN response to intracellular DNA. To explore whether AIM2-like receptors activated another innate signaling pathway upon DNA detection, we performed microarray analysis comparing ALR+/+, ALR-/-, and AIM2-/- macrophages and fibroblasts 4 or 8 hours after transfection with calf-thymus DNA. Total RNA was isolated from ALR+/+, ALR-/-, and AIM2-/- bone marrow-derived macrophages (BMMs) or fibroblasts (MEFs) mock-treated (lipofectamine alone) or transfected with 5ug CT-DNA for 4 or 8 hours.
2016-05-31 | E-GEOD-80766 | biostudies-arrayexpress
Project description:Absent in melanoma 2 (AIM2) is a cytosolic dsDNA sensor that has been broadly studied for its role in inflammasome assembly. However, little is known about the function of AIM2 in adaptive immune cells. The purpose of this study was to investigate whether AIM2 has a cell-intrinsic role in CD4+ T cell differentiation or function. We found that AIM2 is expressed in both human and mouse CD4+ T cells and that its expression is affected by T cell receptor (TCR) activation. Naïve CD4+ T cells from AIM2-deficient (Aim2-/-) mice showed higher ability to maintain forkhead box P3 (FOXP3) expression in vitro, while their capacity to differentiate into T helper (Th)1, Th2 or Th17 cells remained unaltered. Transcriptional profiling by RNA sequencing showed that AIM2 might affect regulatory T cell (Treg) stability not by controlling the expression of Treg signature genes, but through the regulation of the cell's metabolism. In addition, in a T cell transfer model of colitis, Aim2-/--naïve T cells induced less severe body weight loss and displayed a higher ability to differentiate into FOXP3+ cells in vivo. In conclusion, we show that AIM2 function is not confined to innate immune cells but is also important in CD4+ T cells. Our data identify AIM2 as a regulator of FOXP3+ Treg cell differentiation and as a potential intervention target for restoring T cell homeostasis.
2022-05-27 | GSE184479 | GEO