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Comparative transcriptomic response of primary and immortalized macrophage to murine norovirus infection

ABSTRACT: Comparative transcriptomic response of primary and immortalized macrophage to murine norovirus infection

PROVIDER: PRJNA437766 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5341870_1.fastq.gz	Fastqsanger.gz
	SRR5341870_2.fastq.gz	Fastqsanger.gz
	SRR5341861_1.fastq.gz	Fastqsanger.gz
	SRR5341861_2.fastq.gz	Fastqsanger.gz
	SRR5341871_1.fastq.gz	Fastqsanger.gz

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Project description:Murine norovirus is genetically similar to human norovirus, and offers both an efficient in vitro cell culture system and animal model by which to investigate the molecular basis of replication. Here, we present a detailed global view of host alterations to cellular pathways that occur during the progression of a norovirus infection. This was accomplished for both RAW264.7 (RAW) cells, an immortalized cell line widely used in in vitro replication studies, and primary bone marrow-derived macrophages (BMDM), representing a permissive in vivo target cell in the host. Murine norovirus replicated in both cell types, although detected genome copies were approximately one log lower in BMDM compared to RAW cells. RAW and BMDM cells shared an IRF3/7-based IFN response that occurred early in infection. In RAW264.7 cells, transcriptional upregulation and INF-ß expression were not coupled, in that a significant delay in the detection of secreted INF-ß was observed. In contrast, primary BMDM showed an early upregulation of transcripts and immediate release of INF-ß that might account for lower virus yield. Differences in the transcriptional pathway responses included a marked decrease in expression of key genes in the cell cycle and lipid synthesis pathways in RAW264.7 cells compared to that of BMDM. Our comparative analysis indicates the existence of varying host responses to virus infection in populations of permissive cells. Awareness of these differences at the gene level will be important in the application of a given permissive cell culture system to the study of norovirus immunity, pathogenesis, and drug development.

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Project description:Murine norovirus (NoV) is genetically similar to human NoV and offers both an efficient in vitro cell culture system and an animal model by which to investigate the molecular basis of replication. In this study, we present a detailed global view of host alterations to cellular pathways that occur during the progression of a NoV infection. This was accomplished for both Mus musculus BALB/c-derived RAW264.7 (RAW) cells, an immortalized cell line widely used in in vitro replication studies, and primary bone marrow-derived macrophages (BMDM), representing a permissive in vivo target cell in the host. Murine NoV replicated in both cell types, although detected genome copies were approximately one log lower in BMDM compared with RAW cells. RAW and BMDM cells shared an IRF3/7-based IFN response that occurred early in infection. In RAW cells, transcriptional upregulation and INF-β expression were not coupled in that a significant delay in the detection of secreted INF-β was observed. In contrast, primary BMDM showed an early upregulation of transcripts and immediate release of INF-β that might account for lower virus yield. Differences in the transcriptional pathway responses included a marked decrease in expression of key genes in the cell cycle and lipid pathways in RAW cells compared with that of BMDM. Our comparative analysis indicates the existence of varying host responses to virus infection in populations of permissive cells. Awareness of these differences at the gene level will be important in the application of a given permissive culture system to the study of NoV immunity, pathogenesis, and drug development.

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