Project description:Human metapneumovirus (HMPV) is a primary causative agent of acute lower respiratory tract infections. We used single cell RNA-sequencing (scRNA-seq) to assess lung immune profiles in a mouse model of HMPV infection.
Project description:This series includes 1 microarray used to detect a human metapneumovirus strain associated with critical respiratory illness in an elderly male with leukemia (Chiu, et al 2006) Keywords: viral detection
Project description:In vitro infection experiment with genetically modified human metapneumovirus (HMPV) to study the function of the viral small hydrophobic (SH) protein.
Project description:Background. Human Metapneumovirus (HMPV) and Respiratory Syncytial Virus (RSV), are responsible for respiratory diseases mostly in children. In spite of the resemblance between these two pneumoviruses, they elicit a different extent of immune response. miRNAs are small non coding RNAs that regulate gene expression and are involved in numerous cellular processes including the immune system. Methodology. Human monocyte-derived dendritic cells (moDC) were differentiated from peripheral blood mononuclear cells and infected at an MOI of 3 for 24h. RNA was isolated to analyze the miRNAs transcription by high throughput sequencing using illumina technology. Principal findings. Infection with HMPV up-regulated the expression of hsa-miR-4448, while RSV infection induced significant expression of hsa-miR-30a-5p, hsa-miR-182-5p, hsa-miR-1913, hsa37, miR-4448 and hsa-miR-4634. Conclusions/Significance. In human monocyte derived dendritic cells (moDC), RSV and HMPV induced different profiles of miRNA expression. Understanding the changes of miRNA expression profiles by RSV and HMPV in immune cells will further our understanding of the differential immune response induced by these respiratory viruses
Project description:The human metapneumovirus (hMPV) is a new Pneumovirinae related to the avian metapneumovirus type C. hMPV genome differs from human respiratory syncytial virus (RSV) genome by the gene order and the lack of nonstructural genes. Two genetic sub-groups and four sub-types of hMPV are identified. hMPV infections evolve as regular winter outbreaks which have roughly the same size and overlaping RSV epidemics. Among hospitalized children in Caen, hMPV is detected in 9.7% of the cases after RSV (37%), rhinovirus (18%), influenza virus (14.5%), adenovirus (9%), and parainfluenza virus (5%). Most of hMPV infections are observed in children suffering from bronchiolitis, but the localization to lower respiratory tract and the severity of the disease are less frequent in comparison with RSV infections. hMPV is very difficult to isolate using cell culture. Up to now, the only way for hMPV diagnosis was the TS-CRP assays. But the recent apparition of direct antigenic tests allows us to get a fair, rapid, and economic diagnostic tool.
Project description:We retrospectively studied 420 pharyngeal swab specimens collected from Peruvian and Argentinean patients with influenzalike illness in 2002 and 2003 for evidence of human metapneumovirus (HMPV). Twelve specimens (2.3%) were positive by multiple assays. Six specimens yielded HMPV isolates. Four of the 6 isolates were of the uncommon B1 genotype.
