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- W22976237 abstract "This chapter discusses the immunopharmacology of eicosanoids in the gastrointestinal tract. Eicosanoids describe the family of 20-carbon fatty acids that includes the prostaglandins (PGs), leukotrienes (LTs), and thromboxane (TXs). Eicosanoids exert a wide variety of actions and in many systems, one type of eicosanoid exerts an opposing action to that of another eicosanoid. Within the subgroups of eicosanoids, one can also find examples of mediators that have opposing actions on a target tissue as well as examples in which there appears to be a redundancy of actions. The biological actions of PGs in the gastrointestinal tract are diverse, including effects on blood flow, motility, and secretion. Blood flow can be modulated by virtue of the effects of prostanoids on vascular tone, with some being vasodilators (e.g. PGE2) and others vasoconstrictors (e.g. PGF2α). PGs, particularly PGE2 and PGF2α, modulate gastrointestinal motility by virtue of their effects on smooth muscle contractility. Such effects of prostanoids may be particularly important in inflammatory diseases, in which these mediators have been suggested to mediate the motor disturbances characteristic of these disorders. TX receptors (TP receptors) have not been well characterized in the gastrointestinal tract, although there is evidence supporting their existence, particularly on the vasculature. The actions of LTs on various aspects of gastrointestinal function have been well characterized. The peptidoleukotrienes are potent vasoconstrictors and have been shown to markedly increase the susceptibility of the gastric mucosa to injury when administered systemically." @default.
- W22976237 created "2016-06-24" @default.
- W22976237 creator A5027937626 @default.
- W22976237 date "1993-01-01" @default.
- W22976237 modified "2023-10-18" @default.
- W22976237 title "Immunopharmacology of Eicosanoids in the Gastrointestinal Tract" @default.
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