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  • Title: The hyperalgesic effects of prostacyclin and prostaglandin E2.
    Author: Ferreira SH, Nakamura M, de Abreu Castro MS.
    Journal: Prostaglandins; 1978 Jul; 16(1):31-7. PubMed ID: 360300.
    Abstract:
    Hyperalgesia induced in rat paws or dog knee joints by prostacyclin (PGI2) and prostaglandin E2 was measured by a modification of the Randall-Selitto method (1) or by the degree of incapacitation (2). In both species PGI2 induced an immediate hyperalgesic effect but the effect of PGE2 had a longer latency. Low doses of PGI2 caused a short lasting effect but PGE2, large doses of PGI2 or successive administration of small doses of PGI2 caused a long lasting effect. It is suggested that prostacyclin mediates rat paw hyperalgesia induced by carrageenin. The long lasting hyperalgesic effect of PGE2 and high doses of PGI2 is possibly an indirect effect caused by stimulation of a sensory nerve sensitising mechanism.
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