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Transcriptomes of microglia in experimental cerebral malaria in mice in the presence and absence of Type I Interferon signaling

ABSTRACT: Plasmodium berghei ANKA infection in mice is used as a model for human cerebral malaria, the most severe complication of Plasmodium falciparum infection. The response of brain cells such as microglia has been little investigated, and may play a role in the pathogenesis or regulation of cerebral malaria. We showed previously that microglia are activated in P. berghei infections, and that Type 1 Interferon signaling is important for activation. This dataset contains the transcriptome of brain microglia of infected mice in the presence and absence of Type I interferon signaling, with the aim of identifying the genes involved in this pathway in microglia during experimental cerebral malaria. Refererence: Capuccini et al 2016, Scientific Reports, 6:39258 The global gene expression profiles from RNA of microglia isolated from uninfected and P berghei-infected wild-type C57BL/6 mice and and IFNA Receptor Knock-out mice using Illumina Beadarrays.

ORGANISM(S): Mus musculus

PROVIDER: GSE119650 | GEO | 2018/09/07

REPOSITORIES: GEO

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Project description:Analysis of transcriptional response to Plasmodium berghei ANKA infection in cerebral malaria susceptible C57BL/6 mouse brains as well as cerebral malaria resistant BXH2 mice which carry a severe hypomorphic Irf8-R294C allele. Interferon Regulatory Factor 8 (IRF8) is required for development, maturation and expression of anti-microbial defenses of myeloid cells. BXH2 mice harbor a loss-of-function allele at Irf8 (Irf8-R294C) that causes susceptibility to infection with intracellular pathogens, including Mycobacterium tuberculosis. We report that XH2 are completely resistant to the development of cerebral malaria following Plasmodium berghei ANKA infection. Comparative transcriptional profiling of brain RNA as well as chromatin immunoprecipitation and high-throughput sequencing (ChIP-seq) was used to identify IRF8-regulated genes whose expression is associated with pathological acute neuroinflammation. Genes up-regulated by infection were strongly enriched for IRF8 binding sites, suggesting that IRF8 acts as a transcriptional activator in inflammatory programs. These lists were enriched for myeloid-specific pathways, including interferon responses, antigen presentation and Th1 polarizing cytokines. We show that inactivation of several of these downstream target genes confers protection against experimental cerebral malaria. We also report strong overlap between genes bound and regulated by IRF8 during cerebral malaria and genes regulated in the lungs of M. tuberculosis infected mice. This IRF8-dependent network contains several genes recently identified as risk factors in acute and chronic human inflammatory conditions. In summary, this work defines a common core of IRF8-bound genes forming a critical inflammatory host-response network. Comparison of whole brain transcript profiles for wildype C57BL/6 mice versus severely hypomorphic Irf8-R294C BXH2 mice following experimental infection with Plasmodium berghei ANKA (d7). Baseline (d0) profiles are also compared. Pleaes note that each sample record represents 2-4 replicates and sample data table contains mean, standard error of the mean (SEM), and quality for the replicates. The non_normalized data matrix contains raw data for each replicate (total 12 samples).

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Transcriptomes of microglia in experimental cerebral malaria in mice in the presence and absence of Type I Interferon signaling

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