Mild, moderate and severe enterovirus 71 (EV71) isolates infection in human PBMCs
Ontology highlight
ABSTRACT: Hand, foot and mouth disease (HFMD), caused by enterovirus 71 (EV71), presents mild to severe disease, and sometimes fatal neurological and respiratory manifestations. However, reasons for the severe pathogenesis remain undefined. To investigate this, infection and viral kinetics of EV71 isolates from clinical disease (mild, moderate and severe) from Sarawak, Malaysia, were characterized in human rhabdomyosarcoma (RD), neuroblastoma (SH-SY5Y) and peripheral blood mononuclear cells (PBMCs). High resolution transcriptomics was used to decipher EV71-host interactions in PBMCs. Ingenuity analyses revealed similar pathways triggered by all EV71 isolates, although the extent of activation varied. Importantly, several pathways were found to be specific to the severe isolate, including triggering receptor expressed on myeloid cells 1 (TREM-1) signaling. Depletion of TREM-1 in EV71-infected PBMCs with peptide LP17 resulted in decreased levels of pro-inflammatory genes, and reduced viral loads for the moderate and severe isolates. Mechanistically, this is the first report describing the transcriptome profiles during EV71 infections in primary human cells, and the involvement of TREM-1 in the severe disease pathogenesis, thus providing new insights for future treatment targets.
Project description:Enterovirus 71 (EV71) and Coxsackievirus A16 (CA16) are the predominant etiological agents of hand, foot, and mouth disease (HFMD) and both belong to the human enterovirus A species of the Picornaviridae family. These viruses share similar genetic homology, although the clinical manifestations of HFMD caused by the two viruses have some discrepancies. Furthermore, the underlying mechanisms leading to these differences remain unclear. microRNAs (miRNAs) participate in numerous biological or pathological processes, including host responses to viral infections, by targeting messenger RNAs (mRNAs) for translational repression or degradation. Here, we focused on differences in miRNA expression patterns in peripheral blood mononuclear cells (PBMCs) of rhesus monkeys infected with EV71 or CA16 at different time points using high-throughput sequencing technology. For the first time, this study demonstrated that EV71 and CA16 infection result in specific miRNA expression patterns in PBMCs.
Project description:Enterovirus 71 (EV71), a member of the Enterovirus genus in the Picornaviridae family, was first recognized as a dermotrophic virus that usually cause mild, self-limiting hand-foot-and-mouth disease (HFMD). However, EV71 infection can sometimes induce a variety of severe neurological complications, pulmonary edema and even death. Here, we aimed to provide an overview of proteomics characterization of EV71-infected brain and lung tissues.
Project description:To characterize the primary and recall responses to EV71 vaccines, PBMC from 19 recipients before and after vaccination with EV71 vaccine are collected and their gene expression signatures after stimulation with EV71 antigen were compared. Four-condition experiment,pre-vaccination PBMCs (stimulation vs. no stimulation with EV71 antigen) vs. post-vaccination PBMCs (stimulation vs. no stimulation with EV71 antigen)
Project description:Enterovirus 71 (EV71) is one of the major pathogens associated with human hand, foot, and mouth disease (HFMD) and in some countries this pathogen is the leading cause of this disease. We previously found that CA16 could induce neurological disorders in young gerbils, which could serve as a good animal model for studying the neuropathogenesis of CA16 infection. In this study, we found that 1039 genes were up-regulated and 299 genes were down-regulated in CA16-infected gerbils compared with control. Differentially expressed genes were clustered into functional pathways and the top five pathways according to the enrich factor were viral myocarditis, type 1 diabetes mellitus, toxoplasmosis, toll-like receptor signaling pathway and TNF signaling pathway. Our results provide novel insight into the neuropathogenesis of HFMD induced by CA16 infection.
Project description:To characterize the primary and recall responses to EV71 vaccines, PBMCs from 19 recipients before and after vaccination with EV71 vaccine were collected. 14 samples pre-vaccination and 16 samples post-vaccination were detected by microarray and their gene expression signatures after stimulation with EV71 antigen were compared.
Project description:Enterovirus 71 (EV71), a member of Picornaviridae, causes severe neurological and systemic illness in children. To better understand the virus-host cell interactions, we performed a triple-SILAC-based quantitative proteomics study monitoring host cell proteome changes after EV71 infection. Based on the quantitative data for more than 4100 proteins, ~17% of the proteins were found as significantly changed (p<0.01) at either 8 or 20 hours post infection (h.p.i.). Five biological processes and seven protein classes showed significant differences. Functional screening of 9 regulated proteins discovered the regulatory role of CHCH2, a mitochondrial protein known as a transcriptional activator for cytochrome c oxidase (COX), in EV71 replication. Further studies showed that CHCH2 served as a negative regulator of innate immune responses.
Project description:In this study, models of CA10, CA16 and EV71 infection were established in 7-day-old Institute of Cancer Research (ICR) mice by intraperitoneal injection to analyze the pathogenicity of these viruses. RNA sequencing analysis was used to screen the differentially expressed genes (DEGs) after CA10 infection, and innate immune-related pathways were activated in muscle. Compared with CA16 and EV71 infection, CA10 may have an inhibitory effect on Th cell differentiation and cell growth. Additionally, the common DEGs in the three viruses were most enriched in the immune system response, including the Toll-like receptor pathway and the nucleotide-binding and oligomerization domain (NOD)-like pathway. Our findings revealed a group of genes that coordinate in response to CA10 infection and are shared by the three viruses, which increases our understanding of the pathological mechanism of HFMD.
Project description:To elucidate alterations in immune cells during enterovirus 71 (EV-A71) infection and explore potential interaction mechanisms.Single-cell sequencing technology was used to sequence peripheral blood monocytes (PBMCs) obtained from a severe hand, foot and mouth disease (HFMD) patient due to EV-A71 and a healthy control.