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Effects of a thromboxane synthetase inhibitor (OKY-046) in an ischemia-reperfusion model of intrauterine growth retardation in Sprague-Dawley rats.

Abstract
We investigated the effects of thromboxane (TX) A2 in rats with ischemia-reperfusion-induced intrauterine growth retardation. A saline solution or OKY-046, a selective TXA2 synthetase inhibitor, was injected into the caudal vein of pregnant rats on gestation day 17 before the induction of 60-min uteroplacental ischemia. The fetuses and placentas were delivered and examined on gestation day 21. Blood from the uterine vein of the occluded horn shortly after uteroplacental ischemia was collected, and plasma concentrations of TXB2 and 6-keto-prostaglandin (PG) F1 alpha were determined in the other rats on gestation day 17. Treatment with OKY-046 prevented the ischemia-induced reduction in the fetal body and placental weights. The ratio of 6-keto-PGF1 alpha to TXB2 was significantly increased in the OKY-046-treated group. We conclude that the action of TXA2 might play a salient role in our model.
AuthorsM Tanaka, M Natori, H Ishimoto, K Miyakoshi, T Miyazaki, T Kobayashi, Y Yoshimura
JournalBiology of the neonate (Biol Neonate) Vol. 72 Issue 3 Pg. 181-6 ( 1997) ISSN: 0006-3126 [Print] Switzerland
PMID9303217 (Publication Type: Comparative Study, Journal Article)
Chemical References
  • Enzyme Inhibitors
  • Methacrylates
  • Thromboxane B2
  • 6-Ketoprostaglandin F1 alpha
  • Thromboxane-A Synthase
  • ozagrel
Topics
  • 6-Ketoprostaglandin F1 alpha (blood)
  • Animals
  • Disease Models, Animal
  • Dose-Response Relationship, Drug
  • Embryonic and Fetal Development (drug effects, physiology)
  • Enzyme Inhibitors (administration & dosage, pharmacology, therapeutic use)
  • Female
  • Fetal Growth Retardation (etiology, prevention & control)
  • Injections, Intravenous
  • Methacrylates (administration & dosage, pharmacology, therapeutic use)
  • Pregnancy
  • Random Allocation
  • Rats
  • Rats, Sprague-Dawley
  • Reperfusion Injury (complications, prevention & control)
  • Thromboxane B2 (blood)
  • Thromboxane-A Synthase (antagonists & inhibitors)

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