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Severe fever with thrombocytopenia syndrome virus strain:YG1

ABSTRACT: Sequencing analysis of RNAs biding to nucleoprotein of an emerging tick-borne phlebovirus

PROVIDER: PRJDB7482 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR151758.fastq.gz	Fastqsanger.gz
	DRR151759.fastq.gz	Fastqsanger.gz
	DRR151760.fastq.gz	Fastqsanger.gz

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Transcriptional and proteomic dynamics of severe fever with thrombocytopenia syndrome virus infection in Rhipicephalus microplus cells identify antiviral host factors.

Project description:Ticks are vectors of arboviruses in many parts of the world. The rising incidence and emergence of tick-borne arboviral infections across human populations indicates that further transmission control strategies including those based on vectors, will be required to reduce the burden of disease. However, arbovirus-tick interactions at the cellular level remain poorly understood in general, and particularly neglected for negative strand RNA arboviruses. In this study we developed a proteomics informed by transcriptomics approach to characterize the cellular response of Rhipicephalus microplus-derived cell cultures to infection with the tick-borne pathogen severe fever with thrombocytopenia syndrome virus (SFTSV, Phenuiviridae). For this, we generated the first de novo transcriptomes and confirmed proteomes of SFTSV- or mock-infected tick cell cultures derived from a vector species that transmits the virus in nature. Through comprehensive annotation of genes, proteins and pathway analysis, we identified core host responses and regulatory processes mediated in response to SFTSV infection. Moreover, examining the interactome of the virally encoded nucleoprotein (N) allowed us to integrate host responses with the analysis of cellular factors required for viral replication. The influence of specific host genes on SFTSV replication was systematically assessed through dsRNA-mediated gene silencing. This functional genomics approach pinpointed two tick-derived RNA helicases as critical antiviral factors capable of restricting SFTSV infection: the DexD/box helicase (DHX9) and the Up-Frameshift Protein 1 (UPF1). Collectively, our findings enrich the repository of resources available for understanding the antiviral response to SFTSV infection in Rh. microplus vector cells and support the identification of SFTSV-antiviral restrictions factors.

2025-05-26 | PXD052311 | Pride

Ferret animal model of severe fever with thrombocytopenia syndrome phlebovirus for human lethal infection and pathogenesis

Project description:Severe fever with thrombocytopenia syndrome phlebovirus (SFTSV), listed in the WHO most dangerous pathogens, has 12-30% fatality rates with a characteristic thrombocytopenia syndrome. With a majority of clinically diagnosed SFTSV patients older than ~50 years, age is a critical risk factor for SFTSV morbidity and mortality. Here, we report an age-dependent ferret model of SFTSV infection and pathogenesis that fully recapitulates the clinical manifestations of human infections. While young adult ferrets (≤2 years old) did not show any clinical symptoms and mortality, SFTSV-infected aged ferrets (≥4 years old) demonstrated severe thrombocytopenia, reduced white blood cells, and high fever with 93% mortality rate. Moreover, significantly higher viral load was observed in aged ferrets. Transcriptome analysis of SFTSV-infected young ferrets revealed strong interferon-mediated anti-viral signaling, whereas inflammatory immune responses were markedly upregulated and persisted in aged ferrets. Thus, this immunocompetent age-dependent ferret model should be useful for anti-SFTSV therapy and vaccine development.

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Serum Proteomics of Severe Fever with Thrombocytopenia Syndrome Patients

Project description:Dabie bandavirus, also termed as severe fever with thrombocytopenia syndrome virus (SFTSV), was first isolated in China in 2010. At this time, the virus was found to have spread to South Korea, Japan, and other countries. A high case fatality rate is reported for SFTS, ranging from 12–50% within various sources. Several omics for clinical studies among SFTS patients as well as studies of cultured SFTSV have attempted to characterize the relevant molecular biology and epidemiology of the disease. However, a global serum proteomics analysis among SFTS patients has not yet been reported to date. Thrombocytopenia and multiple organ failure are the major immediate causes of death among SFTS patients. In this study, serum proteomic changes related to thrombocytopenia, abnormal immune response, and inflammatory activation were documented in SFTS patients. These findings provide useful information forunderstanding the clinical manifestations of SFTS.

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