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Development and Evaluation of a New Gastroenteritis Clinical Severity Score for Children Aged Under 5.
Acta Paediatr
January 2025
INSERM, Clinical Research Department, University Hospital of Nantes, Nantes, France.
Aim: To develop and internally validate a new severity score to more accurately assess the clinical severity forms of acute gastroenteritis (AGE) in children from birth to age 5 years.
Methods: We included children consulting for AGE in the emergency department of the University Hospital of Nantes (March 2017-June 2019). We developed and evaluated a new predictive score (GASTROVIM score) using the classification and regression trees.
A single residue switch mediates the broad neutralization of Rotaviruses.
Nat Commun
January 2025
State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, School of Life Sciences, School of Public Health, Xiamen University, Xiamen, PR China.
Broadly neutralizing antibodies (bNAbs) could offer escape-tolerant and lasting protection against viral infections and therefore guide development of broad-spectrum vaccines. The increasing challenge posed by viral evolution and immune evasion intensifies the importance of the discovery of bNAbs and their underlying neutralization mechanism. Here, focusing on the pivotal viral protein VP4 of rotavirus (RV), we identify a potent bNAb, 7H13, exhibiting broad-spectrum neutralization across diverse RV genotypes and demonstrating strong prevention of virus infection in female mice.
View Article and Find Full Text PDFSignificant abundance of bacterial flagellin and expression of its surface localized receptor toll-like receptor 5 and cytokine interleukin-22 in South African infants with poor oral rotavirus vaccine take.
Gut Pathog
January 2025
Diarrheal Pathogens Research Unit (DPRU), Department of Virology, Sefako Makgatho Health Sciences University, Ga-rankuwa, Pretoria, South Africa.
Bacterial flagellin, a potent intestinal innate immune activator, prevents murine rotavirus (RV) infection independent of adaptive immunity and interferons. The flagellin-induced immunity is mediated by Toll-like receptor (TLR5) and Nod-like receptor C4 (NLRC4), which elicit the production of interleukins 22 (IL-22) and IL-18, respectively. Here, we assessed whether a high abundance of flagellin at the time of vaccination would negatively affect the oral RV vaccine take.
View Article and Find Full Text PDFViroporin activity is necessary for intercellular calcium signals that contribute to viral pathogenesis.
Sci Adv
January 2025
Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA.
Viruses engage in a variety of processes to subvert host defenses and create an environment amenable to replication. Here, using rotavirus as a prototype, we show that calcium conductance out of the endoplasmic reticulum by the virus encoded ion channel, , induces intercellular calcium waves that extend beyond the infected cell and contribute to pathogenesis. Viruses that lack the ability to induce this signaling show diminished viral shedding and attenuated disease in a mouse model of rotavirus diarrhea.
View Article and Find Full Text PDFUmbilical cord-derived mesenchymal stem cell condition medium effect on rotavirus-infected Caco-2 cells survival and inflammatory responses.
Tissue Cell
December 2024
Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran. Electronic address:
Rotavirus is the most important cause of severe gastroenteritis in infants and children worldwide. This virus causes an increase in inflammatory responses by increasing cellular oxidative stress and the expression and activity of the transcription factor NF-κB and COX-2. As a result of NF-κB activation, the expression of inflammatory cytokines also increases.
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