Effects of ischemia on prostaglandin H synthase-2 expression in piglet choroid plexus

Nishadi Thrikawala, Ferenc Bari, Tracy C. Beasley, Clara Thore, David W. Busija

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Abstract

We examined effects of ischemia on expression of prostaglandin H synthase-1 (PGHS-1) and prostaglandin H synthase-2 (PGHS-2) in piglet choroid plexus. Ten minutes of ischemia was induced by increasing intracranial pressure. Whole choroid plexus was removed and fixed and/or frozen after 1, 2, 4, and 8 h of recovery from anoxic stress. In addition, tissues were obtained from untreated animals or from time control animals. Tissues were analyzed for mRNA, using RNase protection assays, and for proteins, using immunohistochemical approaches. Limited, but detectable PGHS-2 immunoreactivity was present in choroid plexus under normal conditions, and there was no difference between time-control and non-treated animals. Further, PGHS-2 mRNA increased by 2-4 h after ischemia, and enhanced immunoreactivity for PGHS-2 was present at 8 h after ischemia. Enhanced immunoreactivity for PGHS-2 was present in vascular endothelial cells as well as cuboidal epithelial cells and macrophages. In contrast, PGHS-1 mRNA did not increase following ischemia. We conclude that PGHS-2 is present in piglet choroid plexus under normal conditions and that ischemia increases levels of PGHS-2 in choroid plexus.

Original languageEnglish
Pages (from-to)77-87
Number of pages11
JournalProstaglandins and Other Lipid Mediators
Volume56
Issue number2-3
DOIs
Publication statusPublished - Jun 1 1998

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Keywords

  • Cyclooxygenase
  • Prostaglandin H synthase-1
  • Prostaglandins

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Pharmacology
  • Cell Biology

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