A81988 - CAS 141887-34-5
Category: Inhibitor
Not Intended for Therapeutic Use. For research use only.
Molecular Formula:
Molecular Weight:
Angiotensin Receptor
A81988 is a potent, orally active angiotensin I1 antagonist with a long duration of action whose pharmacological profile has established it as an important tool for the investigation of a variety of A11 mediated pathological conditions.
2-[propyl-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]amino]pyridine-3-carboxylic acid; 2-(N-propyl-N-((2'-(1H-tetrazol-5-yl)biphenyl-4-yl)methyl)amino)pyridine-3-carboxylic acid; A 81988; A-81988; A81988; Abbott-81988
Store in a cool and dry place (or refer to the Certificate of Analysis).
Boiling Point:
686.9±65.0 ℃ at 760 Torr
1.313±0.06 g/cm3
Canonical SMILES:
1.Angiotensin II type 1 receptor blockade prevents cardiac remodeling in bradykinin B(2) receptor knockout mice.
Madeddu P;Emanueli C;Maestri R;Salis MB;Minasi A;Capogrossi MC;Olivetti G Hypertension. 2000 Jan;35(1 Pt 2):391-6.
Knockout mice (B(2)(-/-)) lacking the bradykinin (BK) B(2) receptor gene develop mild hypertension, cardiac hypertrophy, and myocardial damage. We hypothesized that these effects are due to the hypertrophying and damaging actions of angiotensin II (Ang II) in the absence of the balancing protection of BK. To verify this hypothesis, B(2)(-/-) or wild-type mice (B(2)(+/+)) were administered a nonpeptide antagonist of Ang II type 1 (AT(1)) receptors (A81988) from conception through 180 days of age. Untreated B(2)(+/+) and B(2)(-/-) served as controls. Blood pressure (BP) and heart rate were monitored with the use of tail-cuff plethysmography at regular intervals. Ventricular weights, diameters, wall thickness, chamber volume, and myocardial fibrosis were measured at 40 and 180 days. No differences were observed in BP, heart rate, and cardiac weight and dimensions between treated and untreated B(2)(+/+). The BP of AT(1) antagonist-treated B(2)(-/-) was reduced until 70 days; then, it increased to the levels found in untreated B(2)(-/-). AT(1) receptor blockade resulted in a reduction in left ventricular mass, chamber volume, and wall thickness and abrogated myocardial fibrosis in B(2)(-/-).
2.Cardiovascular effects of orally administered ABBOTT-81988, an angiotensin II antagonist, in conscious spontaneously hypertensive rats.
Lee JY;Warner RB;Brune ME;Adler AL;Winn M;De B;Zydowsky TM;Opgenorth TJ;Kerkman DJ;DeBernardis JF Am J Hypertens. 1994 Nov;7(11):975-83.
ABBOTT-81988 (A-81988), 2-(N-propyl-N[(2'-[1H-tetrazol-5-yl]biphenyl- 4yl)methyl] amino) pyridine-3-carboxylic acid, a nonpeptide angiotensin II (AII) antagonist was studied in the conscious spontaneously hypertensive rate (SHR) (male, 18 to 21 weeks) for cardiovascular effects of oral administration. Oral A-81988 at 0.3 to 3 mg/kg produced a dose-related 10 to 29% decrease in mean arterial pressure (MAP) in SHR (control, 161 to 177 mm Hg; n = 19) for 12 to 24 h without changing heart rate. Oral A-81988 at 3 mg/kg daily maintained MAP in SHR at normotensive levels (97 to 120 mm Hg) during a 5-day protocol with no rebound hypertension at termination of treatment. There was an increase in plasma renin activity in nanograms AI/milliliter/hour in SHR treated with A-81988 (32 +/- 3, n = 6 v 5 +/- 2, n = 6 for vehicle) during its antihypertensive action. The oral potency of A-81988 was enhanced about 10-fold in furosemide-treated SHR. The pressor response to AII was inhibited selectively in SHR even after an 8-day treatment with A-81988 (approximately 3 mg/kg/day orally). Total peripheral resistance was lowered and cardiac output unchanged in SHR administered A-81988 (3 mg/kg/day orally for 2 days).
3.[3H]A-81988, a potent, selective, competitive antagonist radioligand for angiotensin AT1 receptors.
Hancock AA;Surber BW;Rotert G;Thomas S;Tasker AS;Sorensen BK;Vodenlich AD;Opgenorth TJ;Kerkman DJ;DeBernardis JF Eur J Pharmacol. 1994 Mar 15;267(1):49-54.
Abbott-81988 (A-81988), 2-(N-n-Propyl-N-[(2'-[1H-tetrazol-5-yl]biphenyl-4- yl)methyl]amino)pyridine-3-carboxylic acid is a potent, competitive, non-peptidic antagonist of angiotensin AT1 receptors. A-81988 was labeled with tritium to high specific activity (16 Ci/mmol) and radioligand binding assays performed in rat liver membranes. [3H]A-81988 bound with high affinity (KD = 0.57 nM) and the KD determined from kinetics assays was similar. Non-specific binding (defined with 10(-6) M angiotensin-II) was very low (< 6% at the KD). The binding of [3H]A-81988 was competitive and exhibited appropriate pharmacological specificity for compounds acting at angiotensin AT1 receptors. These properties demonstrate that [3H]A-81988 will be a useful radioligand for studies of angiotensin AT1 receptors in various tissues.
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CAS 141887-34-5 A81988

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