Project description:Myeloid derived suppressor cells (MDSCs) are an immunosuppressive population of immature myeloid cells found in advanced stage cancer patients and mouse tumor models. To identify potential genes playing essential role in MDSC biology, we have conducted microarray analysis of gene expression in MDSCs from esophageal tumor-bearing mice, compared to immature myeloid cells from healthy littermate control mice. In this dataset, we include the expression data obtained from sorted splenic CD11b+Gr1+ cells from tumor-bearing L2-Cre;p120f/f mice, compared to healthy littermate controls. Using these data, we have identified 964 genes showing differential expression between the two groups. Among these was the Cd38 gene, which was among the genes most upregulated in MDSCs from tumor-bearing mice.
Project description:Myeloid derived suppressor cells (MDSCs) are an immunosuppressive population of immature myeloid cells found in advanced stage cancer patients and mouse tumor models. To identify potential genes playing essential role in MDSC biology, we have conducted microarray analysis of gene expression in MDSCs from esophageal tumor-bearing mice, compared to immature myeloid cells from healthy littermate control mice. In this dataset, we include the expression data obtained from sorted splenic CD11b+Gr1+ cells from tumor-bearing L2-Cre;p120f/f mice, compared to healthy littermate controls. Using these data, we have identified 964 genes showing differential expression between the two groups. Among these was the Cd38 gene, which was among the genes most upregulated in MDSCs from tumor-bearing mice. 9 total samples were analyzed: 6 sample from experimental tumor-bearing mice and three pooled samples from control mice. Gene expression difference was determined by univariate test (two-sample t-test) with multivariate permutation test (10,000 random permutations). A cut-off p-value of less than 0.001 and minimum 2-fold expression change were used to identify genes with significant expression differences between the two groups.
Project description:Myeloid derived suppressor cells (MDSCs) are an immunosuppressive population of immature myeloid cells found in advanced stage cancer patients and mouse tumor models. We have identified Cd38 gene as potentially playing an essential role in MDSC biology. To determine the diffences between CD38high and CD38 low MDSCs from tumor-bearing mice, we have conducted this microarray. In this dataset, we include the expression data obtained from sorted splenic CD38high CD11b+Gr1+ cells from tumor-bearing L2-Cre;p120f/f mice, compared to CD38low CD11b+Gr1+ cells from the same mice. Using these data, we have detected differential expression of 498 genes . The Nos2 gene was among the genes most upregulated in CD38high MDSCs.
Project description:Myeloid derived suppressor cells (MDSCs) are an immunosuppressive population of immature myeloid cells found in advanced stage cancer patients and mouse tumor models. We have identified Cd38 gene as potentially playing an essential role in MDSC biology. To determine the diffences between CD38high and CD38 low MDSCs from tumor-bearing mice, we have conducted this microarray. In this dataset, we include the expression data obtained from sorted splenic CD38high CD11b+Gr1+ cells from tumor-bearing L2-Cre;p120f/f mice, compared to CD38low CD11b+Gr1+ cells from the same mice. Using these data, we have detected differential expression of 498 genes . The Nos2 gene was among the genes most upregulated in CD38high MDSCs. 8 total samples were analyzed: 3 pairs of CD38high and CD38 low MDSCs (coming from individual mice), as well a pair of CD38high and CD38low pulled MSDCs (splenocytes from 3 mice were pulled together for sorting to increase yields). Gene expression difference was determined by univariate test (two-sample t-test) with multivariate permutation test (10,000 random permutations). A cut-off p-value of less than 0.001 and minimum 2-fold expression change were used to identify genes with significant expression differences between the two groups.
Project description:Transcriptional profiling of FACS-sorted and splenic control mouse cells, comparing splenic cells from FVBneuN vs Neu+ expressing FVBneuN mice with Gr1+ CD11b+ sorted tumor-infiltrating mononuclear or splenic myeloid-derived suppressor cells 4 groups or conditions. Biological replicates: 2 or 3 per condition. One replicate array per sample. manuscript: van Deventer, H, J Burgents, QP Wu, R Woodford, WJ Brickey, I Allen, E McElvania-Tekippe, J Serody, and J Ting. (2010) The inflammasome component Nlrp3 impairs antitumor vaccine by enhancing the accumulation of tumor-associated myeloid-derived suppressor cells. Cancer Research. variable: cell type: splenic cells from normal FVB-neuN mice, splenic cells from Neu+ tumor-bearing FVB-neuN mice, Gr1+ CD11b+ sorted cells from tumor, Gr1+ CD11b+ sorted cells from spleen repear: biological replicate: #1, #2, #3
Project description:This is a ODE-based mathematical model featuring equations describing the dynamics of tumor cells, cytotoxic T cells, natural killer cells, and myeloid-derived suppressor cells (MDSCs) that together describe the tumor-induced immunosuppression caused by MDSCs.
Project description:Myeloid derived suppressor cells (MDSCs) were sorted from B16 tumor-bearing mice that were untreated or given lymphodepleting cyclophosphamide and fludarbine. We report that monocytic and polymorphonuclear MDSC subsets (M-MDSCs and PMN-MDSCs respectively) have a unique gene expression profile in comparison to MDSCs collected from untreated tumor-bearing animals.
Project description:Myeloid derived suppressor cells (MDSCs) were sorted from B16 tumor-bearing mice, WT and IL-6KO, that were untreated or given lymphodepleting cyclophosphamide and fludarbine. We report that monocytic and polymorphonuclear MDSC subsets (M-MDSCs and PMN-MDSCs respectively) have a unique gene expression profile in comparison to MDSCs collected from untreated tumor-bearing animals.
Project description:Polymorphonuclear myeloid-derived suppressor cell (PMN-MDSC), also named pathologically activated neutrophil, is a critical component of tumor microenvironment (TME), playing crucial roles in tumor progression and therapy resistance. Here, we compared the transcriptome of PMN-MDSCs from B16 tumor bearing mice and the neutrophils from tumor free mice.
Project description:Myeloid-derived suppressor cells (MDSC) are a major barrier to anticancer responses. Although much is known about how MDSC promote tumor progression, little is known about how they develop. We hypothesized that MDSC develop as a consequence of tumor-induced downregulation of interferon regulatory factor-8 (IRF-8), a key myeloid developmental transcription factor. We showed that: 1) IRF8-deficiency in mice generated myeloid populations highly homologous to tumor-induced MDSC; 2) IRF-8 overexpression in mice reduced MDSC accumulation and retarded tumor growth; 3) MDSC-inducing factors, G-CSF or GM-CSF, facilitated IRF-8 downregulation via STAT3- or STAT5-dependent pathways, respectively; and 4) IRF-8 levels in MDSC-like subsets of breast cancer patients were depressed compared to healthy donors. Altogether, our data implicate IRF-8 as a novel MDSC-dependent transcription factor. Splenic CD11b+Gr-1high cell populations from tumor-bearing mice, IRF8 knockout mice or non-tumor-bearing control mice were purified in two independent experiments by flow cytometry (> 97% purity) and subjected to whole genome expression profiling using Illumina microarrays.