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Updated: Oct 21, 2025

Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
Published on: January 28, 2019
[Pathogenesis of rotavirus diarrhea].
M Lorrot1, H Benhamadouche-Casari2, M Vasseur2
1Inserm, Unité 510, Faculté de Pharmacie, Université de Paris XI, 5, rue J. B. Clément, 92296 Châtenay-Malabry, Hôpital Robert Debré, Service de pédiatrie générale, 48, boulevard Sérurier, 75019 Paris.
Rotavirus causes severe infantile gastroenteritis and osmotic diarrhea by impairing nutrient absorption. The viral enterotoxin NSP4 is implicated in glucose-galactose malabsorption, contributing to this condition.
Area of Science:
- Gastroenterology
- Virology
- Cell Biology
Context:
- Rotavirus is a leading cause of infantile gastroenteritis, resulting in significant global mortality.
- The virus targets mature enterocytes in the small intestine, inducing watery diarrhea.
- Diarrhea can manifest with or without observable tissue damage.
Purpose:
- To elucidate the mechanisms by which rotavirus induces diarrhea.
- To investigate the role of the NSP4 viral enterotoxin in rotavirus pathogenesis.
- To differentiate rotavirus diarrhea mechanisms from bacterial enterotoxin-induced diarrhea.
Summary:
- Rotavirus infection disrupts intestinal disaccharidases and Na+-solute symports, leading to carbohydrate maldigestion and nutrient malabsorption.
- Accumulated carbohydrates and malabsorbed nutrients in the intestinal lumen contribute to osmotic diarrhea.
- The viral enterotoxin NSP4 is hypothesized to act as a secretory agonist by mobilizing intracellular calcium, and is directly implicated in glucose-galactose malabsorption.
Impact:
- Understanding rotavirus diarrhea mechanisms is crucial for developing targeted therapies.
- Elucidating the role of NSP4 can inform the development of novel antiviral strategies.
- Differentiating rotavirus diarrhea from other forms of infectious diarrhea aids in clinical management.
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