Ek. Naderali et Nl. Poyser, THE EFFECT OF CAFFEINE ON PROSTAGLANDIN OUTPUT FROM THE PERFUSED MESENTERIC VASCULAR BED OF THE RAT, Prostaglandins, leukotrienes and essential fatty acids, 51(6), 1994, pp. 415-418
Caffeine significantly (p < 0.05) increased the output of prostacyclin
(PGI(2)) from the perfused rat mesenteric vascular bed. The outputs o
f PGE(2) and PGF(2 alpha) were also increased by caffeine. This stimul
atory response to caffeine did not show rapid desensitization. Ryanodi
ne also increased PG output, suggesting that caffeine may be acting vi
a the stimulation of a ryanodine receptor. The increased production of
a vasodilator such as PGI(2) from blood vessels following exposure to
caffeine may explain why caffeine has a beneficial effect in angina.