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  • Title: Electrolyte transport in piglets infected with transmissible gastroenteritis virus. Stimulation by verapamil and clonidine.
    Author: Homaidan FR, Torres A, Donowitz M, Sharp GW.
    Journal: Gastroenterology; 1991 Oct; 101(4):895-901. PubMed ID: 1889713.
    Abstract:
    The effects of clonidine, an alpha 2-adrenergic agonist, and verapamil, a Ca2+ channel blocker, on Na+ and Cl- absorption were studied in stripped jejunal mucosa from control and transmissible-gastroenteritis-virus-infected piglets. All infected piglets developed severe diarrhea 18-24 hours after oral inoculation. Jejunum from infected animals, as compared with control jejunum, had decreased mucosal-to-serosal, serosal-to-mucosal, and net Na+ and Cl- fluxes. Clonidine and verapamil caused a decrease in short-circuit current and stimulation of Na+ and Cl- absorption in control jejunum. In infected piglets, although the jejunum exhibited severe villus atrophy, both drugs stimulated Na+ and Cl- absorption and the magnitude of Na+ and Cl- absorption was similar in control and transmissible-gastroenteritis-infected jejunum. In contrast, D-glucose stimulated Na+ absorption, and the decrease in short-circuit current caused by verapamil and clonidine, were decreased in transmissible-gastroenteritis-infected jejunum. Such pharmacological stimulation of Na+ and Cl- absorption might be useful in the management and treatment of certain viral diarrheal diseases.
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