Inhibition of thromboxane A2 production does not improve post-ischemic brain hyperfusion in the dog

Donald Prough, D. Kong, W. D. Watkins

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In a canine model of global brain ischemia, six dogs received a selective thromboxane A2 synthetase inhibitor, UK 38,485 (dazmagrel) before the ischemic event; six received a saline placebo. Cerebral blood flow (CBF), systolic and diastolic arterial pressure, cardiac output, pH, PaCO2, PaO2, and arterial and jugular-vein thromboxane B2 (a stable metabolite of thromboxane A2) and 6-keto PGF(1α) (a stable metabolite of prostacyclin) were measured at baseline, after release of aortic and venae caval occlusion and at intervals up to 120 min thereafter. Treated animals showed nearly complete post-ischemic inhibition of thromboxane B2 production; control animals showed increases in jugular venous thromboxane B2. Arterial and jugular venous levels of 6-keto PGF(1α) were significantly higher in treated animals at most post-ischemic intervals. CBF in both groups was similar to baseline values at time 0, then declined similarly in both groups by 30 min to ~35% of baseline values where it remained thereafter. There were no significant differences in other variables at any intervals. We conclude that inhibition of thromboxane A2 production does not alter post-ischemic brain hypoperfusion.

Original languageEnglish (US)
Pages (from-to)1272-1276
Number of pages5
JournalStroke
Volume17
Issue number6
StatePublished - 1986
Externally publishedYes

Fingerprint

Thromboxane B2
Thromboxane A2
Cerebrovascular Circulation
Prostaglandins F
Dogs
Brain
Neck
Thromboxane-A Synthase
Venae Cavae
Jugular Veins
Epoprostenol
Brain Ischemia
Cardiac Output
Canidae
Arterial Pressure
Placebos
Blood Pressure

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Neuroscience(all)

Cite this

Inhibition of thromboxane A2 production does not improve post-ischemic brain hyperfusion in the dog. / Prough, Donald; Kong, D.; Watkins, W. D.

In: Stroke, Vol. 17, No. 6, 1986, p. 1272-1276.

Research output: Contribution to journalArticle

@article{5303afb03bc548039a48405de2ec53a5,
title = "Inhibition of thromboxane A2 production does not improve post-ischemic brain hyperfusion in the dog",
abstract = "In a canine model of global brain ischemia, six dogs received a selective thromboxane A2 synthetase inhibitor, UK 38,485 (dazmagrel) before the ischemic event; six received a saline placebo. Cerebral blood flow (CBF), systolic and diastolic arterial pressure, cardiac output, pH, PaCO2, PaO2, and arterial and jugular-vein thromboxane B2 (a stable metabolite of thromboxane A2) and 6-keto PGF(1α) (a stable metabolite of prostacyclin) were measured at baseline, after release of aortic and venae caval occlusion and at intervals up to 120 min thereafter. Treated animals showed nearly complete post-ischemic inhibition of thromboxane B2 production; control animals showed increases in jugular venous thromboxane B2. Arterial and jugular venous levels of 6-keto PGF(1α) were significantly higher in treated animals at most post-ischemic intervals. CBF in both groups was similar to baseline values at time 0, then declined similarly in both groups by 30 min to ~35{\%} of baseline values where it remained thereafter. There were no significant differences in other variables at any intervals. We conclude that inhibition of thromboxane A2 production does not alter post-ischemic brain hypoperfusion.",
author = "Donald Prough and D. Kong and Watkins, {W. D.}",
year = "1986",
language = "English (US)",
volume = "17",
pages = "1272--1276",
journal = "Stroke",
issn = "0039-2499",
publisher = "Lippincott Williams and Wilkins",
number = "6",

}

TY - JOUR

T1 - Inhibition of thromboxane A2 production does not improve post-ischemic brain hyperfusion in the dog

AU - Prough, Donald

AU - Kong, D.

AU - Watkins, W. D.

PY - 1986

Y1 - 1986

N2 - In a canine model of global brain ischemia, six dogs received a selective thromboxane A2 synthetase inhibitor, UK 38,485 (dazmagrel) before the ischemic event; six received a saline placebo. Cerebral blood flow (CBF), systolic and diastolic arterial pressure, cardiac output, pH, PaCO2, PaO2, and arterial and jugular-vein thromboxane B2 (a stable metabolite of thromboxane A2) and 6-keto PGF(1α) (a stable metabolite of prostacyclin) were measured at baseline, after release of aortic and venae caval occlusion and at intervals up to 120 min thereafter. Treated animals showed nearly complete post-ischemic inhibition of thromboxane B2 production; control animals showed increases in jugular venous thromboxane B2. Arterial and jugular venous levels of 6-keto PGF(1α) were significantly higher in treated animals at most post-ischemic intervals. CBF in both groups was similar to baseline values at time 0, then declined similarly in both groups by 30 min to ~35% of baseline values where it remained thereafter. There were no significant differences in other variables at any intervals. We conclude that inhibition of thromboxane A2 production does not alter post-ischemic brain hypoperfusion.

AB - In a canine model of global brain ischemia, six dogs received a selective thromboxane A2 synthetase inhibitor, UK 38,485 (dazmagrel) before the ischemic event; six received a saline placebo. Cerebral blood flow (CBF), systolic and diastolic arterial pressure, cardiac output, pH, PaCO2, PaO2, and arterial and jugular-vein thromboxane B2 (a stable metabolite of thromboxane A2) and 6-keto PGF(1α) (a stable metabolite of prostacyclin) were measured at baseline, after release of aortic and venae caval occlusion and at intervals up to 120 min thereafter. Treated animals showed nearly complete post-ischemic inhibition of thromboxane B2 production; control animals showed increases in jugular venous thromboxane B2. Arterial and jugular venous levels of 6-keto PGF(1α) were significantly higher in treated animals at most post-ischemic intervals. CBF in both groups was similar to baseline values at time 0, then declined similarly in both groups by 30 min to ~35% of baseline values where it remained thereafter. There were no significant differences in other variables at any intervals. We conclude that inhibition of thromboxane A2 production does not alter post-ischemic brain hypoperfusion.

UR - http://www.scopus.com/inward/record.url?scp=0022930796&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022930796&partnerID=8YFLogxK

M3 - Article

C2 - 3544349

AN - SCOPUS:0022930796

VL - 17

SP - 1272

EP - 1276

JO - Stroke

JF - Stroke

SN - 0039-2499

IS - 6

ER -