Suppressive effect of selective thromboxane synthetase inhibitor, OKY-046 on airway hyperresponsiveness after influenzavirus infection of guinea pig.

1991 ◽  
Vol 22 (1) ◽  
pp. 85-86
Author(s):  
KENJI MINOGUCHI
Keyword(s):  
Guinea Pig ◽  
Airway Hyperresponsiveness ◽  
Suppressive Effect ◽  
Synthetase Inhibitor ◽  
Thromboxane Synthetase Inhibitor ◽  
Thromboxane Synthetase

Thrombocytopaenia, Thromboxane And Prostacyclin Production During The Forssman Reaction In The Guinea-Pig: Effect Of A Thromboxane Synthetase Inhibitor

1981 ◽  
Author(s):  
J Westwick ◽  
K Butler ◽  
A Honey ◽  
S Krishnamurthi ◽  
V V Kakkar
Keyword(s):  
Guinea Pig ◽  
Post Injection ◽  
Blood Samples ◽  
Synthetase Inhibitor ◽  
Thromboxane Synthetase Inhibitor ◽  
Thromboxane Synthetase ◽  
Thromboxane Production ◽  
Antigen Antibody ◽  
Prostacyclin Production ◽  
Forssman Antibody

Intra venous (iv) injection of Forssman antibody into the guinea-pig (GP) is known to result in a rapid antigen antibody reaction in the lungs leading to bronchospasm and thrombocytopaenia. Death as a result of Forssman shock has been shown to be complement and platelet dependentGroups of 5 Duncan-Hartley GP (350-400g) received either 0.2ml (sub lethal groups) or 0.6ml (lethal groups) of rabbit anti Forssman antiserum (RAFA) iv, then 5ml blood samples were collected via carotid artery cannula, into 0.5ml ice cold EDTA (lOOmM) and indomethacin (180μM) mixture at 0, 1, 3 and 5 min. post injection. The blood samples were rapidly centrifuged at 15,000g for 3 min, plasma removed and frozen at -20°C until assayed. The plasma was then assayed for TxB2 and 6-oxo-PGF1α using specific RIA’s. There was a marked TxB2 production during the thrombocytopaenia with a concomitant small increase in 6-oxo-PGF1α production.However, when groups of 5 GPs were dosed iv with 0, 1, 3 or 10 mg/kg of UK-37, 248, a potent and selective thromboxane synthetase inhibitor, 3 mins prior to 0.2ml of RAFA the resulting thrombocytopaenia was not inhibited at 0, 0.5, 1, 2, 5, 10 and 15 min post RAFA. Thus thromboxane production does not appear to be contributory to the Forssman induced thrombocytopaenia in the GP.

Platelet changes after a saturated fat meal and their prevention by dazmegrel, a thromboxane synthetase inhibitor

Lipids ◽  
1987 ◽  
Vol 22 (3) ◽  
pp. 159-162 ◽  
Author(s):  
J. J. F. Belch ◽  
A. R. Saniabadi ◽  
K. McLaughlin ◽  
C. D. Forbes
Keyword(s):  
Saturated Fat ◽  
Synthetase Inhibitor ◽  
Thromboxane Synthetase Inhibitor ◽  
Thromboxane Synthetase ◽  
Fat Meal

Prevention of cerebral vasospasm after SAH with a thromboxane synthetase inhibitor, OKY-1581

1982 ◽  
Vol 57 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Tomio Sasaki ◽  
Susumu Wakai ◽  
Takao Asano ◽  
Kintomo Takakura ◽  
Keiji Sano
Keyword(s):  
Cerebral Vasospasm ◽  
Morphological Changes ◽  
Content Type ◽  
Synthetase Inhibitor ◽  
Thromboxane Synthetase Inhibitor ◽  
Thromboxane Synthetase ◽  
Basilar Arteries ◽  
Blood Injection ◽  
Subarachnoid Blood ◽  
Fine Print

✓ The efficacy of thromboxane synthetase inhibitor in the prevention of cerebral vasospasm after subarachnoid hemorrhage (SAH) was evaluated in a prolonged experiment using dogs. Changes in the diameter of the basilar artery were followed by angiography, and morphological changes were studied by photomicroscopy and electron microscopy. As a thromboxane synthetase inhibitor, OKY-1581 (sodium-(E)-3-(4(-3-pyridylmethyl)phenyl)-2-methylacrylate)was used. Dogs received intravenous injections of 160 mg of OKY-1581 dissolved in 2 ml of physiological saline immediately after subarachnoid blood injection. Subsequently, the animals received continuous intravenous infusion of the drug at the rate of 4 gm/50 ml/24 hours until sacrifice 4 days after induction of SAH. Control dogs received subarachnoid blood injection without treatment with OKY-1581. Angiographic examination revealed that the late spasm was almost completely abolished by the treatment with OKY-1581. Early spasm was also prevented, but the drug's effect was less prominent than it was on the late spasm. Morphological study revealed degenerative changes in the endothelium and myonecrotic changes in the tunica media following SAH in the basilar arteries of the treated as well as the untreated dogs. However, corrugation of the internal elastic lamina was almost completely absent in the treated dogs. The above results indicate that a disproportionate synthesis of thromboxane A2 plays an important role in the evolution of chronic cerebral vasospasm following SAH, and that drugs such as OKY-1581 that selectively inhibit thromboxane synthetase might be useful in the prevention of vasospasm.

Attenuation of noradrenergic neurotransmission by the thromboxane synthetase inhibitor, UK 38,485

Life Sciences ◽  
1984 ◽  
Vol 35 (2) ◽  
pp. 221-228 ◽  
Author(s):  
Edwin K. Jackson ◽  
Howard D. Uderman ◽  
William A. Herzer ◽  
Robert A. Branch
Keyword(s):  
Synthetase Inhibitor ◽  
Thromboxane Synthetase Inhibitor ◽  
Thromboxane Synthetase
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