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Titolo:
CARDIOVASCULAR PHARMACOLOGY OF THE A(2A) ADENOSINE RECEPTOR ANTAGONIST, SCH-58261, IN THE RAT
Autore:
MONOPOLI A; CASATI C; LOZZA G; FORLANI A; ONGINI E;
Indirizzi:
SCHERING PLOUGH RES INST,SAN RAFFAELE SCI PK,VIA OLGETTINA 58 I-20132MILAN ITALY
Titolo Testata:
The Journal of pharmacology and experimental therapeutics
fascicolo: 1, volume: 285, anno: 1998,
pagine: 9 - 15
SICI:
0022-3565(1998)285:1<9:CPOTAA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-TRACTUS-SOLITARIUS; SPONTANEOUSLY HYPERTENSIVE RATS; RADIOLIGAND H-3 SCH-58261; IN-VIVO; AGONISTS; POTENT; NONXANTHINE; ZM-241385; RELEASE; TRIAZOLOQUINAZOLINE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
A. Monopoli et al., "CARDIOVASCULAR PHARMACOLOGY OF THE A(2A) ADENOSINE RECEPTOR ANTAGONIST, SCH-58261, IN THE RAT", The Journal of pharmacology and experimental therapeutics, 285(1), 1998, pp. 9-15

Abstract

We characterized the in vivo cardiovascular profile of SCH 58261, 2-(2-furyl)-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c] pyrimidine, a selective A,, adenosine receptor antagonist, in conscious, freely moving rats by use of the telemetry system. In normotensive rats, SCH 58261, at 10mg/kg i.p., significantly (P < .05) inhibited hypotension and tachycardia induced by the A(2A) receptor agonist 2-hexynyl-5'-N-ethylcarboxamidoadenosine (0.01 mg/kg i.p.), but not the bradycardic effect causedby the A(1) receptor agonist 2-chloro-N-6-cyclopentyladenosine (0.03 mg/kg i.p.). SCH 58261, when administered alone, at 0.1 and 1 mg/kg i.p., did not induce significant hemodynamic changes, but at 10 mg/kg i.p., it slightly increased both systolic blood pressure (SEP) and diastolic blood pressure (DBP) (+19 +/- 3 and +16 +/- 2 mm Hg, respectively; P < .01) and heart rate (HR) (+85 +/- 5 beats/min; P < .01). These effects were inhibited by adrenergic blockade with propranolol (30 mg/kg i.p.) and phentolamine (10 mg/kg i.p.): -5 +/- 3 mm Hg on DBP and -12 +/- 11 beats/min on HR (P < .01). In spontaneously hypertensive rats, SCH 58261, at 3 and 10 mg/kg i.p., increased weakly both SEP (+19 +/- 5 mm Hg and +25 +/- 4 mm Hg) and DBP (+14 +/- 4 mm Hg and +23 +/- 4 mm Hg) vs. vehicle (P < .01) and HR (+45 +/- 17 and +64 +/- 18 beats/min vs. vehicle, respectively; P < .01). The data indicate that SCH 58261 retains A(2A) selective receptor antagonist properties in vivo. Itseffect on cardiovascular sympathetic outflow further suggests that endogenous adenosine exerts a tonic vascular regulation through A(2A) receptors. Therefore, SCH 58261 can be a useful pharmacological tool forclarifying A(2A)-mediated cardiovascular actions of adenosine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:05:41