L-648,051, sodium 4-[3-(4-acetyl-3-hydroxy-2-propylphenoxy)-propylsulfonyl]-γ-oxo-benzenebutanoate: a leukotriene D4 receptor antagonist

1986 ◽  
Vol 64 (12) ◽  
pp. 1535-1542 ◽  
Author(s):  
T. R. Jones ◽  
Y. Guindon ◽  
R. Young ◽  
E. Champion ◽  
L. Charette ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Competitive Inhibitor ◽  
Topical Agent ◽  
Guinea Pig Ileum ◽  
Leukotriene D4 ◽  
Plot Analysis ◽  
Prostaglandin F ◽  
D4 Receptor ◽  
Intraduodenal Administration

L-648,051, sodium 4-[3-(4-acetyl-3-hydroxy-2-propylphenoxy)propylsulfonyl]-γ-oxo-benzenebutanoate is a selective and competitive inhibitor of [3H]leukotriene D4 (KB value of 4.0 μM) and to a lesser extent [3H]leukotriene C4 (Ki value of 36.7 μM) binding in guinea pig lung homogenates. Functionally, it selectively antagonized contractions of guinea pig trachea induced by leukotrienes C4, D4, E4, and F4 in concentrations that did not antagonize contractions induced by acetylcholine, histamine, serotonin, prostaglandin F2α, or U-44069 (endoperoxide analogue). Schild plot analysis indicated that L-648,051 competitively antagonized contractions of guinea pig ileum induced by leukotriene D4 (pA2 7.7) and contractions of trachea induced by leukotrienes D4, E4, and F4 (pA2 7.3, 7.4, and 7.5, respectively). Contractions of guinea pig trachea induced by leukotriene C4 were inhibited in a noncompetitive fashion (Schild plot slope, 0.45). Developed contractions of trachea induced by the leukotrienes were rapidly reversed by L-648,051 > FPL-55712 > L-649,923. Intravenous L-648,051 selectively blocked bronchoconstriction induced in anaesthetized guinea pigs by intravenous leukotrienes C4, D4, and E4 but not that induced by arachidonic acid, serotonin, U-44069, or acetylcholine. The compound displayed poor activity following intraduodenal administration. The profile of activity for L-648,051 indicates that it may be a useful topical agent for studying the role of leukotrienes in diseases such as bronchial asthma.

L-649,923, Sodium (βS*, γR*)-4-(3-(4-acetyl-3-hydroxy-2-propylphenoxy)-propylthio)-γ-hydroxy-β-methylbenzenebutanoate, a selective, orally active leukotriene receptor antagonist

1986 ◽  
Vol 64 (8) ◽  
pp. 1068-1075 ◽  
Author(s):  
T. R. Jones ◽  
R. Young ◽  
E. Champion ◽  
L. Charette ◽  
D. Denis ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Competitive Inhibition ◽  
Competitive Inhibitor ◽  
Plot Analysis ◽  
Prostaglandin F ◽  
Leukotriene Receptor ◽  
Orally Active ◽  
Intraduodenal Administration

L-649,923, Sodium (βs*, γR*)-4-(3-(4-acetyi-3-hydroxy-2-propylphenoxy)propylthio)-γ-hydroxy-β-methylbenzenebutanoate is a selective and competitive inhibitor of [3H]leukotriene D4 (Ki value of 400 nM) and to a lesser extent [3H]leukotriene C4 (Ki value of 8.6 μM) binding in guinea-pig lung homogenates. Functionally, it selectively antagonized contractions of guinea pig trachea induced by leukotriene C4, D4, E4, and F4 but not those induced by acetylcholine, histamine, serotonin, prostaglandin F2α, or U-44069 (stable endoperoxide analogue). Schild plot analysis indicated a competitive inhibition of contractions of guinea-pig ileum induced by leukotriene D4 (pA2 8.1) and contractions of guinea-pig trachea induced by leukotrienes E4 and F4 (pA2 7.1 and 6.9, respectively). In contrast, contractions of guinea-pig trachea induced by leukotrienes C4 (pA2 7.2; slope 0.6) and D4 (pA2 7.2; slope 0.7) were inhibited in a noncompetitive fashion. In vivo, intravenously administered L-649,923 selectively blocked bronchoconstriction induced in anesthetized guinea pigs by leukotriene C4 and D4 (ED50 values i.v. 0.38 and 0.26 mg/kg, respectively) but not that induced by histamine, arachidonic acid, serotonin, U-44069, or acetylcholine. Following intraduodenal administration, L-649,923, blocked leukotriene D4 induced bronchoconstriction (5 and 10 mg/kg). The present findings indicate that selective antagonists, such as L-649,923, may be useful for defining the role of leukotrienes in diseases such as bronchial asthma.

Pharmacology of L-660,711 (MK-571): a novel potent and selective leukotriene D4 receptor antagonist

1989 ◽  
Vol 67 (1) ◽  
pp. 17-28 ◽  
Author(s):  
T. R. Jones ◽  
R. Zamboni ◽  
M. Belley ◽  
E. Champion ◽  
L. Charette ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Receptor Antagonist ◽  
Guinea Pigs ◽  
Competitive Inhibitor ◽  
Dose Ratio ◽  
Leukotriene D4 ◽  
Small Component ◽  
Human Trachea ◽  
D4 Receptor ◽  
Orally Active

L-660,711 (3-(3-(2-(7-chloro-2-quinolinyl)ethenyl)phenyl) ((3-dimethyl amino-3-oxo propyl)thio)methyl)thio)propanoic acid is a potent and selective competitive inhibitor of [3H]leukotriene D4 binding in guinea pig (Ki value, 0.22 nM) and human (Ki value, 2.1 nM) lung membranes but is essentially inactive versus [3H]leukotriene C4 binding (IC50 value in guinea pig lung, 23 μM). Functionally it competitively antagonized contractions of guinea pig trachea and ileum induced by leukotriene (LT) D4 (respective pA2 values, 9.4 and 10.5) and LTE4 (respective pA2 values, 9.1 and 10.4) and contractions of human trachea induced by LTD4 (pA2 value, 8.5). L-660,711 (5.8 × 10−8 M) antagonized contractions of guinea pig trachea induced by LTC4 in the absence (dose ratio = 28) but not in the presence of 45 mM L-serine borate (dose ratio <2). L-660,711 (1.9 × 10−5 M) did not block contractions of guinea pig trachea induced by histamine, acetylcholine, 5-hydroxytryptamine, PGF2α, U-44069, or PGD2. In the presence of atropine, mepyramine, and indomethacin, L-660,711 (1.9 × 10−5 M) inhibited a small component of the response to antigen on guinea pig trachea but completely blocked anti-IgE-induced contractions of human trachea. L-660,711 (i.v.) antagonized bronchoconstriction induced in anesthetized guinea pigs by i.v. LTC4, LTD4, and LTE4 but did not block bronchoconstriction to arachidonic acid, U-44069, 5-hydroxytryptamine, histamine, or acetylcholine. Intraduodenal L-660,711 antagonized LTD4 (0.2–12.8 μg/kg) -induced bronchoconstriction in guinea pigs, and p. o. L-660,711 blocked LTD4- and Ascaris-induced bronchoconstriction in conscious squirrel monkeys and ovalbumin-induced bronchoconstriction in conscious sensitized rats treated with methysergide (3 μg/kg). The pharmacological profile of L-660,711 indicates that it is a potent, selective, orally active leukotriene receptor antagonist which is well suited to determine the role played by LTD4 and LTE4 in asthma and other pathophysiologic conditions.

Role of eicosanoids in hyperpnea-induced airway responses in guinea pigs

1993 ◽  
Vol 75 (6) ◽  
pp. 2797-2804 ◽  
Author(s):  
A. Garland ◽  
J. E. Jordan ◽  
D. W. Ray ◽  
S. M. Spaethe ◽  
L. Alger ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Guinea Pigs ◽  
Quiet Breathing ◽  
Leukotriene D4 ◽  
Mechanically Ventilated ◽  
Respiratory System Resistance ◽  
D4 Receptor ◽  
Airway Responses ◽  
Previous Demonstration

Guinea pigs mechanically hyperventilated with dry gas exhibit hyperpnea-induced bronchoconstriction (HIB) and hyperpnea-induced bronchovascular hyperpermeability (HIBVH). Tachykinins released from airway C-fiber neurons are the central mediators of guinea pig HIB but play only a contributory role in HIBVH. Recent studies suggest that eicosanoid mediators can provoke bronchoconstriction and bronchovascular hyperpermeability, are released by dry gas hyperpnea, and can themselves elicit or modulate tachykinin release. We therefore hypothesized that eicosanoids may participate in HIB and/or HIBVH. To test these hypotheses, we analyzed respiratory system resistance changes and Evans blue-labeled albumin extravasation into the airways of 60 tracheostomized and mechanically ventilated guinea pigs. Animals were subjected to 10 min of isocapnic dry gas hyperpnea or to quiet breathing of humidified gas and received as pretreatment either piroxicam, a cyclooxygenase (CO) inhibitor; A-63162, a 5-lipoxygenase (5-LO) inhibitor; BW-755c, a combined CO and 5-LO inhibitor; ICI-198,615, a leukotriene D4 receptor antagonist; or no drug. HIB was substantially (50–80%) reduced by each of the four eicosanoid-modulating drugs. In contrast, HIBVH was reduced only by BW-755c, and this effect occurred only within the extrapulmonary airways (42% reduction). These data indicate that both CO and 5-LO products, including leukotriene D4, participate in the pathogenesis of HIB but that, like tachykinins, they play only a small contributory role in HIBVH. Together with our previous demonstration that sensory neuropeptide release is critical for the occurrence of HIB, we conclude that the roles of eicosanoids and tachykinins in guinea pig HIB are interdependent.

scholarly journals Role of Rho proteins in smooth muscle contraction of intact guinea-pig ileum.

1999 ◽  
Vol 79 ◽  
pp. 269
Author(s):  
Mayumi Mori ◽  
Hiromi Tsushima
Keyword(s):  
Smooth Muscle ◽  
Guinea Pig ◽  
Muscle Contraction ◽  
Smooth Muscle Contraction ◽  
Rho Proteins ◽  
Guinea Pig Ileum

scholarly journals Role of prostaglandin in peristalsis in the isolated guinea pig ileum.

1994 ◽  
Vol 64 ◽  
pp. 163
Author(s):  
Nagao Suzuki ◽  
Jin-iti Fukami ◽  
Yasuo Gomi
Keyword(s):  
Guinea Pig ◽  
Guinea Pig Ileum

scholarly journals Role of neuronal and inducible nitric oxide synthases in the guinea pig ileum myenteric plexus duringin vitroischemia and reperfusion

2013 ◽  
Vol 25 (2) ◽  
pp. e114-e126 ◽  
Author(s):  
C. Giaroni ◽  
S. Marchet ◽  
E. Carpanese ◽  
V. Prandoni ◽  
R. Oldrini ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Guinea Pig ◽  
Myenteric Plexus ◽  
Nitric Oxide Synthases ◽  
Guinea Pig Ileum ◽  
Inducible Nitric Oxide
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