Project description:The goal of our study is to determine whether Atg16L1 deficiency leads to differences in the transcriptional profile of CD11c+ Dendritic Cells, ultimately leading to an increased inflammatory phenotype. CD11c+ cell sorted splenic DCs were isolated from 8 week old WT and Atg16L1 hypomorphic mice from spleens of allo-HSCT recipients on day 7 were placed directly into TRIzol LS (Invitrogen). mRNA was isolated, amplified, and hybridized to an Affymetrix GeneChip (MOE430A).
Project description:This SuperSeries is composed of the following subset Series: GSE22127: Expression profiling of small intestine lamina propria dendritic cells GSE22128: Expression profiling of splenic dendritic cells Dendritic cells play a vital role in initiating robust immunity against pathogens as well as maintaining immunological tolerance to self antigens, food antigens and intestinal commensals. However, the intracellular signaling networks that program DCs to become tolerogenic are largely unknown. To address this, we analyzed gene expression profiles using microarray analysis of purified intestinal lamina propria DCs (CD11c+ CD11b+ DCs and CD11c+ CD11b- DCs) and compared it to splenic DCs (CD11c+ DC), from mice. We sought to determine the unique genetic profile of small intestine lamina propria CD11c+ cells compared to splenic CD11c+ cells. We performed a meta-analysis using the expression profiles of Intestinal lamina propria CD11c+ CD11b+ DCs (GSM550122), Intestinal lamina propria CD11c+ CD11b- DCs (GSM550121) and Splenic CD11c+ DCs (GSM550126). This study combined and re-normalized the microarray data from GSE22127 and GSE22128 studies. Refer to individual Series for additional details
Project description:Analysis of gene expressions in mouse splenic dendritic cells (DCs). DCs were purified into two subsets, CD8-positive and -negative ones. DCs were expanded in vivo by injecting Flt3L-producing tumors into the backs of C57BL/6 mice. To expand DCs in vivo, Flt3L-producing B16 melanoma cells were injected to the backs of mice. Then, 10-12 days later, splenic DCs were enriched by MACS and purified into CD3-B220-CD8a+CD11c+ and CD3-B220-CD8a-CD11c+ cells by FACS cell sorter.
Project description:Dendritic cells play a vital role in initiating robust immunity against pathogens as well as maintaining immunological tolerance to self antigens, food antigens and intestinal commensals. However, the intracellular signaling networks that program DCs to become tolerogenic are largely unknown. To address this, we analyzed gene expression profiles using microarray analysis of purified intestinal lamina propria DCs (CD11c+ CD11b+ DCs and CD11c+ CD11b- DCs) and compared it to splenic DCs (CD11c+ DC), from mice. This SuperSeries is composed of the SubSeries listed below.
Project description:The prediction of acute graft-versus-host disease (aGvHD) post allogeneic hematopoietic stem cell transplantation (allo-HSCT) is critical for treatment decisions. The granulocytic myeloid-derived suppressor cells (G-MDSCs) show a fast recovery post-transplantation and constituted the major part of peripheral blood in the early phase after allo-HSCT. These cells were previously believed to exhibit immunosuppressive properties. However, they also promote inflammation under specific conditions. Thus, we conducted a comprehensive study of G-MDSCs from 82 patients after allo-HSCT within 90 days to elucidate the role of them in post-transplantation immunity. Strikingly, our results showed that G-MDSCs promoted inflammation in the early-stage, by facilitating cytokine secretion and proliferation of T cells, as well as their differentiation into pro-inflammatory T helper subsets. At day 28, patients with a higher number of G-MDSCs exhibited an increased risk of developing aGvHD. Besides, adoptive transfer of G-MDSCs from patients into humanized mice exacerbated aGvHD. However, at day 90, G-MDSCs showed immunosuppressive features, characterized by upregulated expression of indoleamine 2,3-dioxygenase gene and interleukin-10 secretion, coupled with the inhibition of T cell proliferation. Furthermore, transcriptional analysis of G-MDSCs at day 28 and day 90 revealed that a total of 1445 genes were differentially expressed. Genes linked to the endoplasmic reticulum stress were upregulated in patients without aGvHD. After the genetic overlap analysis, DERL1 may be the hub-gene. Our findings elucidate the alteration in the immune characteristics of G-MDSCs within the first 90 days post allo-HSCT. Moreover, the quantity of G-MDSCs at day 28 could serve as a predictive indicator for aGvHD.
Project description:Dendritic cells (DCs) play a vital role in innate immunity. Transcriptome of DCs isolated from mouse spleen was obtained and deposited here. Keywords: Spleen, DCs We sought to determine the expression profile of splenic CD11c+ cells. RNA was extracted from DCs sorted from mouse spleen (CD11c+ cells) and hybridized on Affymetrix microarrays.