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West Nile virus-inclusive single-cell RNA sequencing reveals heterogeneity in the type I interferon response within single cells

ABSTRACT: West Nile virus-inclusive single-cell RNA sequencing reveals heterogeneity in the type I interferon response within single cells

PROVIDER: PRJNA515627 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8450840.fastq.gz	Fastqsanger.gz
	SRR8450850.fastq.gz	Fastqsanger.gz
	SRR8450860.fastq.gz	Fastqsanger.gz
	SRR8450870.fastq.gz	Fastqsanger.gz
	SRR8450880.fastq.gz	Fastqsanger.gz

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West Nile virus-inclusive single-cell RNA sequencing reveals heterogeneity in the type I interferon response within single cells

Project description:West Nile virus (WNV) is a neurotropic mosquito-borne flavivirus of global importance. Neuroinvasive WNV infection results in encephalitis and can lead to prolonged neurological impairment or death. Type I interferon (IFN-I) is crucial for promoting antiviral defenses through the induction of antiviral effectors, which function to restrict viral replication and spread. However, our understanding of the antiviral response to WNV infection is mostly derived from analysis of bulk cell populations. It is becoming increasingly apparent that substantial heterogeneity in cellular processes exists among individual cells, even within a seemingly homogenous cell population. Here, we present WNV-inclusive single-cell RNA sequencing (scRNA-seq), an approach to examine the transcriptional variation and viral RNA burden across single cells. We observed that only a few cells within the bulk population displayed robust transcription of IFN-β mRNA, and this did not appear to depend on viral RNA abundance within the same cell. Furthermore, we observed considerable transcriptional heterogeneity in the IFN-I response, with genes displaying high unimodal and bimodal expression patterns. Broadly, IFN-stimulated genes negatively correlated with viral RNA abundance, corresponding with a precipitous decline in expression in cells with high viral RNA levels. Altogether, we demonstrated the feasibility and utility of WNV-inclusive scRNA-seq as a high-throughput technique for single-cell transcriptomics and WNV RNA detection. This approach can be implemented in other models to provide insights into the cellular features of protective immunity and identify novel therapeutic targets.

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Project description:Purpose of this experiment was to further understand how innate immune defenses impact host response and West Nile virus tissue tropism. This study examined host-transcriptional response to West Nile virus in permissive and nonpermissive tissues using wildtype mice and mice with genetically altered interferon signaling pathways. Age-matched six to twelve week old mice were inoculated subcutaneously in the left rear footpad with 100 PFU of West Nile virus isolate TX 2002-HC (WNV-TX) in a 10 microL inoculum diluted in Hanks balanced salt solution (HBSS) supplemented with 1% heat-inactivated FBS. Mice were monitored daily for morbidity and mortality. Expression oligonucleotide arrays were performed on RNA isolated from spleen and liver tissues from strain and time-matched mock infected mice (n=2) and WNV-TX infected wild type (WT; n=3; day 4 post-infection), Ips-1-/-(n=3; day 4 post-infection), Ifnar-/- (n=3; day 2 post-infection), and Ips-1-/-xIfnar-/- (DKO; n=3; day 4 post-infection) mice.

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