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Title: Prostacyclin and prostaglandin synthesis in isolated brain capillaries. Author: Gecse A, Ottlecz A, Mezei Z, Telegdy G, Joó F, Dux E, Karnushina I. Journal: Prostaglandins; 1982 Mar; 23(3):287-97. PubMed ID: 6808590. Abstract: The synthesis of prostacyclin and prostaglandins was examined in isolated blood-free brain capillaries of guinea-pigs and rats using 1-14C-arachidonic acid as a precursor. The main prostaglandins synthesized by guinea-pig microvessels were prostaglandin D2 and prostaglandin E2. Substantially less prostaglandin F2 alpha or the prostacyclin stable metabolite, 6-oxo-prostaglandin F1 alpha was synthesized. Rat capillary prostaglandin distribution differed substantially from that of the guinea-pigs although the principle prostaglandin was also PGD2. Total prostaglandin conversion was greater in guinea-pig capillaries than in the rat. Norepinephrine stimulated the prostaglandin forming capacity of blood free cerebral microvasculature of guinea-pigs. Prostacyclin and prostaglandins could be involved in the activity dependent regulation of regional cerebral blood flow and permeability.[Abstract] [Full Text] [Related] [New Search]