PMID: 2841866Aug 1, 1988Paper

Effect of sulfidopeptide leukotrienes D4 and E4 on ileal ion transport in vitro in the rat and rabbit

The American Journal of Physiology
P L SmithJ D Fondacaro

Abstract

Effects of leukotrienes D4 and E4 (LTD4 and LTE4) on electrolyte transport were examined, employing stripped segments of rat and rabbit ileum mounted in Ussing chambers. Addition of LTD4 or LTE4 to the serosal but not the mucosal bathing solution elicited a transient increase in short-circuit current (Isc) with maximal responses seen at 10(-5) M and 10(-8) M in rat and rabbit respectively and a sustained decrease in transepithelial conductance (Gt) in the rat only. In the rat, Cl replacement, reduction of bathing solution [Ca2+] to 1 microM or pretreatment with 1 microM indomethacin or meclofenamic acid inhibited the LTD4- or LTE4-induced Isc changes with no effect on the decrease in Gt. LTD4 (10 microM) transiently increased net Cl secretion and produced a sustained decrease in both unidirectional and net Na transport and mucosal-to-serosal Cl flux in rat ileum. The decrease in unidirectional Na fluxes is accounted for predominantly by a change in the potential independent flux of Na. These results suggest that the increase in Isc in both rat and rabbit is mediated by arachidonic acid metabolites, whereas the decrease in Gt and net Na absorption in rat ileum is mediated by a cyclooxygenase-independent pathway.

Citations

Apr 26, 2008·American Journal of Physiology. Gastrointestinal and Liver Physiology·Jamilur R TalukderUma Sundaram
Sep 25, 2009·World Journal of Gastroenterology : WJG·Jeff Huaqing Ye, Vazhaikkurichi M Rajendran
Feb 1, 2011·Pflügers Archiv : European journal of physiology·Michael Eisenhut, Helen Wallace

Related Concepts

Chloride Ion Level
Electric Conductivity
Mesothelium
Ileum
Osmosin
Intestinal Absorption
Structure of Intestinal Gland
August Rats
Sodium
SRS-A

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