Effect of adrenergic agonists on eicosanoid output from isolated rabbit choroid plexus and iris-ciliary body

David Yohai, Abraham Danon

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Prostanoid production by rabbit choroid plexus (CP) and irisciliary body (ICB), and the effects of adrenergic agonists thereon, were studied in vitro. Immunoreactive prostaglandin (PG) E2 was the major prostanoid released by both tissues; the output from ICB was some two orders of magnitude greater than from CP. Immunoreactive 6-keto PGF and thromboxane (TX) B2, the dehydration products of prostacyclin and TXA2, respectively, were detected in smaller quantities. Epinephrine stimulated the outputs of PGE2 and 6-keto PGF, but not of TXB2, from both tissues.ICB responded to epinephrine concentrations of 10-4 and 10-5, while only 10-4 was effective in stimulating prostanoid synthesis in the CP. Phenylephrine, an adrenergic agonist, stimulated prostanoid output from the ICB, but not from the CP. It is concluded that adrenergic mechanisms stimulate the biosynthesis of prostanoids in the rabbit CP and ICB. The implications of such interactions to aqueous humor and cerebrospinal fluid dynamics, or to other processes in brain and ocular physiology, are discussed.

Original languageEnglish
Pages (from-to)227-235
Number of pages9
JournalProstaglandins Leukotrienes and Essential Fatty Acids
Volume28
Issue number3
DOIs
StatePublished - 1 Jan 1987
Externally publishedYes

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