Abstract:
:1. We tested the hypothesis that increasing myocardial cyclic GMP levels would reduce myocardial O2 consumption and areas of low O2 supply/consumption balance, using zaprinast, a selective cyclic GMP-phosphodiesterase inhibitor. 2. The study was conducted in three groups (vehicle, 10(-3) and 3 x 10(-3) mol/L zaprinast) of anaesthetized open-chest New Zealand white rabbits (n = 24). Coronary blood flow (radioactive microspheres), arterial and venous O2 saturation (microspectrophotometry), O2 consumption, cyclic GMP content (competitive binding) and cyclic GMP-phosphodiesterase activity (conversion of 3H-cyclic GMP to 3H-GMP) were determined. 3. Agents were applied to a patch on the myocardial surface and did not cause significant haemodynamic changes, except for bradycardia in the vehicle and low dose group. 4. The total myocardial cyclic GMP-phosphodiesterase activity was 148 +/- 14 while the zaprinast (10 mumol/L) inhibitable activity averaged 63 +/- 8 pmol/mg protein per min. Cyclic GMP content was increased with increasing doses of zaprinast (vehicle, 4.308 +/- 0.349 pmol/g; low dose zaprinast, 4.803 +/- 0.279 and high dose zaprinast, 7.938 +/- 1.304 pmol/g). 5. Coronary blood flow was not different after treatment (198 +/- 11, 209 +/- 10 and 153 +/- 9 mL/min per 100 g for the vehicle, low and high dose zaprinast, respectively). 6. Under control conditions, 48% of the small veins had O2 saturations below 50%. With zaprinast, this value was reduced to 19% for the low and 24% for the high dose. 7. Average venous O2 saturation increased with zaprinast (49 +/- 2%, 61 +/- 3% and 59 +/- 1%).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Clin Exp Pharmacol Physioljournal_title
Clinical and experimental pharmacology & physiologyauthors
Weiss HR,Rodriguez E,Tse J,Scholz PMdoi
10.1111/j.1440-1681.1994.tb02561.xsubject
Has Abstractpub_date
1994-08-01 00:00:00pages
607-14issue
8eissn
0305-1870issn
1440-1681journal_volume
21pub_type
杂志文章abstract::1. Initial unsuccessful attempts to evaluate ventricular function in terms of the 'heart as a pump' led to focusing on the 'heart as a muscle' and to the concept of myocardial contractility. However, no clinically ideal index exists to assess the contractile state. The aim of the present study was to develop a mathema...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2010.04282.x
更新日期:2005-10-01 00:00:00
abstract::1. Using the electromagnetic flow probe and the radioactive microsphere technique, systemic and regional haemodynamic variables were measured in conscious normotensive and hypertensive rabbits. The rabbits were made hypertensive by unilateral nephrectomy combined with cellophane-wrapping of the remaining kidney and sy...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1981.tb00155.x
更新日期:1981-05-01 00:00:00
abstract::1. Nitric oxide (NO) plays an important role in the control of glomerular haemodynamics and is synthesized from the amino acid L-arginine by a family of enzymes, NO synthase (NOS). 2. Nitric oxide synthase is present in the endothelium and also in the macula densa, a plaque of specialized tubular epithelial cells. End...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章,评审
doi:10.1111/j.1440-1681.1997.tb02094.x
更新日期:1997-08-01 00:00:00
abstract::1. Over the past 50 years considerable evidence has been reported suggesting that endogenous opioids participate in the control of renal function. 2. Exogenous administration of opioids produces profound changes in the renal excretion of water and sodium. 3. Opioids produce changes in urine output and urine sodium exc...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章,评审
doi:10.1111/j.1440-1681.1995.tb02324.x
更新日期:1995-12-01 00:00:00
abstract::1. In a number of species, high concentrations of angiotensin II (AngII) receptors have been found in the rostral ventrolateral medulla (RVLM) in the hindbrain, which is an important region involved in the modulation of sympathetic vasomotor tone. The present review describes studies in which the contribution of angio...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章,评审
doi:10.1111/j.1440-1681.1996.tb02820.x
更新日期:1996-09-01 00:00:00
abstract::The amino acid sequence of human renin was identified for the first time. This was determined from the nucleotide sequence of exons in the human renin gene identified in a genomic library by recombinant DNA techniques. Examination of amino acid residues involved in the enzymatic hydrolysis by human renin of the unique...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1984.tb00281.x
更新日期:1984-07-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1986.tb00362.x
更新日期:1986-04-01 00:00:00
abstract::1. Medullary blood flow (MBF) is important in the long-term control of arterial pressure. However, it is unclear which vascular elements regulate MBF. 2. Exogenous endothelin (ET)-1 decreases cortical more than medullary blood flow. We hypothesized that ET-1 would therefore constrict afferent (AA) and efferent arterio...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2004.04036.x
更新日期:2004-08-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1989.tb01618.x
更新日期:1989-08-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2006.04519.x
更新日期:2006-12-01 00:00:00
abstract::1. Although it is well established that hypertension is the main risk factor for stroke, the complexity of cerebrovascular problems related to hypertension is not generally appreciated. 2. Hypertension can cause stroke through many mechanisms. A high intraluminal pressure will lead to extensive alteration in endotheli...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章,评审
doi:10.1046/j.1440-1681.1999.03081.x
更新日期:1999-07-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1983.tb00231.x
更新日期:1983-09-01 00:00:00
abstract::1. The effects of dietary sodium on blood pressure and levels of sodium, other electrolytes and noradrenaline (NA) in the cerebrospinal fluid (CSF) and blood of 15 patients with essential hypertension were studied. The CSF and blood sampling was carried out after 7 days of a high salt intake (16-18 g/day) and after 7 ...
journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1992.tb00444.x
更新日期:1992-04-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2011.05593.x
更新日期:2011-11-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1983.tb00172.x
更新日期:1983-01-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2008.05085.x
更新日期:2009-04-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2007.04633.x
更新日期:2007-08-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
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更新日期:2003-05-01 00:00:00
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更新日期:2008-02-01 00:00:00
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doi:10.1111/j.1440-1681.1981.tb00750.x
更新日期:1981-09-01 00:00:00
abstract::Nowadays, tramadol hydrochloride is frequently used as a pain reliever, and for the treatment of premature ejaculation. Decreased semen quality was noted in chronic tramadol users. The present study aimed to elucidate the effects of tramadol on the testicular functions of adult male rats. A total of 40 albino adult ma...
journal_title:Clinical and experimental pharmacology & physiology
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更新日期:2014-04-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1046/j.1440-1681.2002.03688.x
更新日期:2002-07-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1977.tb02675.x
更新日期:1977-07-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1046/j.1440-1681.2000.03249.x
更新日期:2000-05-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.2011.05536.x
更新日期:2011-08-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
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更新日期:2008-08-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1997.tb02113.x
更新日期:1997-09-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章
doi:10.1111/j.1440-1681.1987.tb00960.x
更新日期:1987-02-01 00:00:00
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journal_title:Clinical and experimental pharmacology & physiology
pub_type: 杂志文章,随机对照试验
doi:10.1111/1440-1681.12163
更新日期:2014-02-01 00:00:00