losartan-potassium and rolofylline

losartan-potassium has been researched along with rolofylline* in 3 studies

Other Studies

3 other study(ies) available for losartan-potassium and rolofylline

ArticleYear
Clinical trials update from the European Society of Cardiology heart failure meeting: TNT subgroup analysis, darbepoetin alfa, FERRIC-HF and KW-3902.
    European journal of heart failure, 2006, Volume: 8, Issue:5

    This article provides information and a commentary on trials relevant to the pathophysiology, prevention and treatment of heart failure, presented at the European Society of Cardiology heart failure meeting held in June 2006. All reports should be considered as preliminary data, as analyses may change in the final publication. In a sub-group analysis of the TNT study, intensive treatment with high-dose atorvastatin significantly reduced hospitalisations for heart failure in patients with stable coronary heart disease, compared with low-dose atorvastatin; this benefit was most evident in patients with a history of heart failure at baseline. In a combined analysis of two studies of darbepoetin alfa, which included 475 patients, treatment increased and maintained haemoglobin levels and produced non-significant improvements in symptoms and morbidity in anaemic heart failure patients compared to placebo. In the FERRIC-HF study (n=35), intravenous iron sucrose therapy improved exercise capacity and symptom status in iron-deficient heart failure patients. In a combined analysis of two studies (n=186), the adenosine A(1) receptor antagonist KW-3902 showed diuretic properties and appeared to enhance response to loop diuretics in heart failure patients hospitalised with fluid overload.

    Topics: Anemia; Atorvastatin; Cardiology; Clinical Trials as Topic; Congresses as Topic; Darbepoetin alfa; Diuretics; Erythropoietin; Europe; Exercise Tolerance; Ferric Compounds; Ferric Oxide, Saccharated; Glucaric Acid; Heart Failure; Heptanoic Acids; Humans; Hydroxymethylglutaryl-CoA Reductase Inhibitors; Pyrroles; Societies, Medical; Xanthines

2006
Evidence against a major role of adenosine in oxygen-dependent regulation of erythropoietin in rats.
    Kidney international, 1997, Volume: 52, Issue:2

    This in vivo study investigated whether adenosine (ADO) plays a role in oxygen-dependent production of erythropoietin (EPO). Exposure of rats to 0.075% carbon monoxide (CO) for four hours was used as a stimulus for EPO production. To inhibit potential effects of ADO, rats were treated with the non-specific ADO antagonist theophylline, the selective ADO A1 receptor blockers DPCPX and KW-3902, the selective ADO A2 receptor blocker DMPX, and AOPCP, an inhibitor of 5'-ectonucleotidase, an ADO generating enzyme that is expressed on the surface of EPO producing cells. To stimulate ADO receptor activity, animals were treated with the selective ADO A1 and A2 receptor agonists CHA and CGS 21680, the ADO reuptake inhibitors dipyridamole and soluflazine and the ADO desaminase inhibitor EHNA. At doses known to interfere with ADO signal transmission in vivo, none of these substances either influenced EPO serum levels in normoxic rats or affected the approximately 30-fold rise in EPO serum levels and the increase in renal EPO mRNA after exposure to carbon monoxide. Continuous administration of theophylline to normoxic rats for seven days did not alter hematocrit, hemoglobin or EPO serum levels. Taken together, these experiments do not support the hypothesis that ADO plays an important role in the regulation of EPO production.

    Topics: Adenine; Adenosine; Adenosine Diphosphate; Animals; Antihypertensive Agents; Carbon Monoxide; Dipyridamole; Diuretics; Drug Synergism; Enzyme Inhibitors; Erythropoietin; Gene Expression; Hypoxia; Kidney; Male; Oxygen; Phenethylamines; Phosphodiesterase Inhibitors; Piperazines; Purinergic P1 Receptor Agonists; Purinergic P1 Receptor Antagonists; Rats; Rats, Wistar; Receptors, Purinergic P1; RNA, Messenger; Theophylline; Vasodilator Agents; Xanthines

1997
Modulation of erythropoietin production by selective adenosine agonists and antagonists in normal and anemic rats.
    Life sciences, 1996, Volume: 59, Issue:9

    Hypoxia or anemia is the fundamental stimulus for erythropoietin (EPO) production. Recent in vitro studies suggest that EPO secretion in response to hypoxia is regulated by adenosine in the kidney. In order to examine the in vivo effect of adenosine on EPO production, we determined the effects of adenosine receptor agonists and antagonists on serum EPO concentration in normal and anemic rats. In normal rats, intravenous injection of adenosine agonists (NECA, CHA and CGS-21680) dose-dependently stimulated EPO production. Pretreatment with KW-3902, an adenosine A1 antagonist with modest A2b antagonistic action, or KF17837, an adenosine A2a antagonist, inhibited the NECA (0.1 mg/kg, i.v.)-stimulated EPO production. Anemic hypoxia, induced by 2% (v/w body weight) blood withdrawal, increased serum EPO concentration from 38 +/- 2 to 352 +/- 76 mU/ml, with the increased serum adenosine concentration in the renal vein. KF17837 (0.1 mg/kg, i.v.), but not KW-3902 (0.1 mg/kg, i.v.), inhibited the anemic hypoxia-induced increase in EPO production. The present findings support the notion that adenosine mediates the EPO production in response to hypoxia in the kidney.

    Topics: Adenosine; Adenosine-5'-(N-ethylcarboxamide); Analysis of Variance; Anemia; Animals; Erythropoietin; Hematocrit; Hypoxia; Kinetics; Male; Nephrectomy; Phenethylamines; Purinergic P1 Receptor Agonists; Purinergic P1 Receptor Antagonists; Rats; Rats, Wistar; Time Factors; Xanthines

1996