Abstract:
AIMS:The aim of this study was to investigate the effect of policosanol on the susceptibility of LDL-C to in vitro lipid peroxidation in human healthy volunteers. METHODS:The effect of policosanol (5 and 10 mg day(-1) on LDL-C oxidation was studied in a double-blind, randomized, placebo-controlled trial conducted in 69 subjects. LDL-C samples isolated at baseline and after 8 weeks were subjected to in vitro tests of LDL-C oxidation. We tested the susceptibility of LDL-C to lipid peroxidation in a cell-free system by the addition of copper ions as well as in a more physiological system, macrophage-mediated oxidation. RESULTS:At baseline all groups were well matched regarding all variables. After 8 weeks of therapy policosanol administered at 5 and 10 mg, significantly and in a dose-dependent manner increased the lag phase of conjugated diene generation (mean +/- s.d.) from 83.79+/-29.16 min to 94.90+/-25.50 min (5 mg day(-1)) and from 82.74+/-17.16 min to 129.89+/-35.71 min (10 mg day(-1)), while in the placebo group LDL-C oxidation did not change significantly. Policosanol (10 mg day(-1)), but not placebo, significantly decreased the rate of conjugated diene generation. Comparison with placebo after therapy also showed significant differences. Macrophage mediated-oxidation was also inhibited by policosanol as evident by measuring thiobarbituric acid reactive substances (TBARS). Policosanol (10 mg day(-1)) significantly lowered malondialdehyde (MDA) generation from 8.50+/-0.91 to 5.76+/- 1.01 nmol mg(-1) protein. Comparison with placebo after 5 and 10 mg day(-1) showed significant differences. Policosanol significantly lowered total cholesterol by 10.5% (5 mg day(-1)) and 12.4% (10 mg day(-1)) and LDL-C by 16.7% and 20.2%, respectively. Also, policosanol (10 mg day(-1)) increased HDL-C by 15.2%. Five subjects withdrew from the study, none because of adverse experiences. No clinical or blood biochemical drug-related disturbances were found. CONCLUSIONS:The present study demonstrated that policosanol administered within its therapeutic dosage for lowering cholesterol (5 and 10 mg day(-1)), decreased the susceptibility of LDL-C to lipid peroxidation in vitro.
journal_name
Br J Clin Pharmacoljournal_title
British journal of clinical pharmacologyauthors
Menéndez R,Más R,Amor AM,González RM,Fernández JC,Rodeiro I,Zayas M,Jiménez Sdoi
10.1046/j.1365-2125.2000.00250.xkeywords:
subject
Has Abstractpub_date
2000-09-01 00:00:00pages
255-62issue
3eissn
0306-5251issn
1365-2125pii
bcp250journal_volume
50pub_type
临床试验,杂志文章abstract::The effect of urinary pH on flecainide excretion has been evaluated in six healthy subjects after a single oral dose of 300 mg flecainide administered as the acetate salt. The cumulative urinary excretion of unchanged flecainide under acidic conditions (134.0 +/- 16.1 mg; mean +/- s.e. mean) was significantly higher t...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1984.tb02370.x
更新日期:1984-04-01 00:00:00
abstract:AIMS:This study investigated the safety, tolerability and pharmacokinetics after administration of a specific Cannabis sativa cultivar extract, standardised to cannabidiol (CBD) content as sublingual wafer or oil formulation compared to nabiximols oromucosal spray. METHODS:For the single-dose study, the design was an ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14617
更新日期:2020-10-19 00:00:00
abstract::Mechanistic target of rapamycin (mTOR) is a serine/threonine kinase that functions as a key regulator of cell growth, division and survival. Many haematologic malignancies exhibit elevated or aberrant mTOR activation, supporting the launch of numerous clinical trials aimed at evaluating the potential of single agent m...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1111/bcp.12888
更新日期:2016-11-01 00:00:00
abstract::We have introduced to the course in pharmacology for medical students a simple human experiment that demonstrates the efficacy of activated charcoal in gastrointestinal drug binding. Sixty-one students were given 40 mg frusemide with water, water only, or 40 mg frusemide and 8 g activated charcoal with water either im...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1990.tb03805.x
更新日期:1990-09-01 00:00:00
abstract:WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT:• The topical second generation anti-histamine azelastine hydrochloride (AZE) and the potent corticosteroid fluticasone propionate (FP) are well established first-line treatments in allergic rhinitis (AR). • MP29-02, a novel intranasal AZE and FP formulation, has been shown to c...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2125.2012.04222.x
更新日期:2012-07-01 00:00:00
abstract:AIMS:To examine the hypothesis that sildenafil, a phosphodiesterase type 5 inhibitor that inhibits cGMP breakdown, could enhance nitric oxide-mediated vasodilation and reverse endothelial dysfunction in chronic smokers. METHODS:Flow-mediated dilation of the brachial artery and forearm postischemic reactive hyperemia (...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1365-2125.2003.01974.x
更新日期:2004-02-01 00:00:00
abstract::1 Five normal subjects received pre-treatment with cimetidine 200 mg three times daily and 400 mg at night for 6 days, or matching placebo. 2 Caffeine (300 mg) was given orally before any treatment and at the beginning of the last day of each treatment course. Treatments were randomly allocated and separated by at lea...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1981.tb01194.x
更新日期:1981-08-01 00:00:00
abstract:AIMS:Spirometry, plethysmography and impulse oscillometry (IOS) measure different aspects of lung function. These methods have not been compared for their ability to assess long- and short-acting anticholinergic agents. We therefore performed a double-blind, placebo-controlled, four-way cross-over study in 30 healthy s...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2125.2006.02594.x
更新日期:2006-04-01 00:00:00
abstract::The oral delivery of peptides and proteins has been hampered by an array of obstacles. However, several promising novel oral delivery systems have been developed. This paper reviews the most advanced oral formulation technologies, and highlights key lessons and implications from studies undertaken to date with these o...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1111/bcp.12557
更新日期:2015-05-01 00:00:00
abstract:AIMS:Formoterol is a beta2-adrenoceptor agonist marketed as a racemic mixture of the active (R; R)- and inactive (S; S)-enantiomers (rac-formoterol). The drug produces prolonged bronchodilation by inhalation but there is significant interpatient variability in duration of effect. Previous work has shown that in humans ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1046/j.1365-2125.2000.00133.x
更新日期:2000-02-01 00:00:00
abstract:AIMS:Case reports and small case series suggest increased central nervous system (CNS) toxicity, especially convulsions, after overdose of mefenamic acid, compared with other nonsteroidal anti-inflammatory drugs (NSAIDs), although comparative epidemiological studies have not been conducted. The current study compared r...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.13169
更新日期:2017-04-01 00:00:00
abstract::1 The effects of propranolol and atenolol given in random order in a cross-over study to fifteen patients with essential hypertension have been studied. 2 Both drugs were effective in lowering blood pressure and side effects were not markedly different. 3 There was no change in exchangeable sodium or potassium or in t...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1980.tb00501.x
更新日期:1980-07-01 00:00:00
abstract::The pharmacokinetics of four sustained-release formulations of theophylline have been examined after single doses (Nuelin SA, Phyllocontin, Slo-phyllin and Theo-Dur) and at steady-state (Phyllocontin, Theo-Dur) in six healthy adult volunteers, selected because they all eliminated theophylline rapidly after an intraven...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1985.tb05116.x
更新日期:1985-12-01 00:00:00
abstract::1 Soluble aspirin, 600 mg and 1200 mg, and placebo were compared in a double-blind, cross-over study in 12 patients with post-operative pain following removal of impacted lower third molars. 2 Significant analgesia after 600 mg aspirin occurred only at 45 min after administration, whereas significant analgesia after 1...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2125.1982.tb01870.x
更新日期:1982-06-01 00:00:00
abstract:WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT:Randomized controlled trials (RCTs) are believed to be one of the best methods of clinical research because they can minimize systematic errors of various types. Temporal trends in the various aspects of RCTs have been studied in several medical fields (e.g. nephrology, hepatolo...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.2008.03108.x
更新日期:2008-06-01 00:00:00
abstract::The discovery of immune checkpoints and their role in modulating immune response have revolutionised cancer treatment in recent years. The immune checkpoints, cytotoxic T-lymphocyte-associated protein 4, programmed cell death protein 1 and its ligand, programmed cell death-ligand 1, have been extensively studied. Curr...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1111/bcp.14338
更新日期:2020-09-01 00:00:00
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journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1984.tb02456.x
更新日期:1984-08-01 00:00:00
abstract:AIMS:Since patients who regularly take NSAIDS may use sucralfate because of its cytoprotective properties, we examined the influence of this compound on the pharmacokinetics of diclofenac. METHODS:Potassium diclofenac (105 mg) was administered orally to eighteen healthy male volunteers with or without a 5-day pre-trea...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1997.tb00040.x
更新日期:1997-01-01 00:00:00
abstract::In a double-blind trial the effects on ventilatory function (FEV1), heart rate and blood pressure of oral pirbuterol and oral salbutamol in various single doses were studied in ten patients with chronic asthma. Pirbuterol (15 mg) and salbutamol (4 mg) produced equal peak levels of bronchodilatation. There was no signi...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1976.tb04881.x
更新日期:1976-08-01 00:00:00
abstract:AIMS:To evaluate the electroencephalographic (EEG) effects, blood concentrations, vehicle irritation and dose-effect relationships for diazepam administered nasally. METHODS:The study had a cross-over design with eight healthy volunteers (one drop out). It consisted of four legs with four different administrations: in...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.0306-5251.2001.01486.x
更新日期:2001-11-01 00:00:00
abstract::1. The efficacy of felodipine a new calcium channel blocker with selective vasodilator activity in the management of severe low output cardiac failure, secondary to coronary heart disease, was determined in 10 patients. 2. Haemodynamic measurements were made at rest and during dynamic exercise and left ventricular fun...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1988.tb05254.x
更新日期:1988-06-01 00:00:00
abstract:AIMS:This study compares physicians' recall of the claims of benefits on cardiovascular disease and diabetes made by pharmaceutical sales representatives for drugs approved on the basis of a surrogate outcome, i.e., an off-label claim, compared with those approved on the basis of a serious morbidity or mortality (clini...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.13360
更新日期:2017-11-01 00:00:00
abstract::1 The potency of single doses of the aldosterone antagonist SC8109 relative to spironolactone in reversing the urinary electrolyte effects of fludrocortisone was examined in a double-blind, balanced, crossover study in six healthy volunteers. 2 For the urinary ratio log10 10Na/K, the relative potency of SC8109; spiron...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2125.1981.tb01299.x
更新日期:1981-11-01 00:00:00
abstract::The hypertensive disorders of pregnancy (HDP) are a leading cause of maternal mortality and morbidity in both well and under-resourced settings. Maternal, fetal, and neonatal complications of the HDP are concentrated among, but not limited to, women with pre-eclampsia. Pre-eclampsia is a systemic disorder of endotheli...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2125.2011.04002.x
更新日期:2011-09-01 00:00:00
abstract::1 The anticholinergic effects of atropine and two antihistamines (terfenadine and mequitazine) were investigated vs placebo in a double-blind study. 2 Salivary secretion, basal pupil diameter, pilocarpine (0.25%) induced miosis and heart rate were determined in eight healthy volunteers, seven male and one female, aged...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2125.1988.tb03278.x
更新日期:1988-01-01 00:00:00
abstract::Intravenous midazolam (mean dose of 6.3 mg) was given to 100 consecutive patients coming to endoscopy. All patients had an ear oximeter attached throughout the procedure to record continuously their levels of oxygen saturation. Eighty-five of the 100 patients had pre-endoscopy respiratory function tests measured, and ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1987.tb03104.x
更新日期:1987-06-01 00:00:00
abstract:AIMS:The aim of this study was to investigate the effects of a single green tea (GT), administered concomitantly or 1 hour before nadolol intake on nadolol pharmacokinetics. METHODS:In a randomized 3-phase crossover study, 11 healthy volunteers received an oral administration of nadolol with, or 1 hour after preingest...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14315
更新日期:2020-11-01 00:00:00
abstract::1 This study was designed to compare in a double-blind randomized crossover trial, atenolol, labetalol, metoprolol and pindolol. Considerable differences in dose (atenolol 138 +/- 13 mg daily; labetalol 308 +/- 34 mg daily; metoprolol 234 +/- 22 mg daily; and pindolol 24 +/-2 mg daily were required to produce similar ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1979.tb04774.x
更新日期:1979-04-01 00:00:00
abstract::1. The aromatic 2-hydroxylation of imipramine was studied in microsomes from three human livers. The kinetics were best described by a biphasic enzyme model. The estimated values of Vmax and Km for the high affinity site ranged from 3.2 to 5.7 nmol mg-1 h-1 and from 25 to 31 microM, respectively. 2. Quinidine was a po...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1992.tb04133.x
更新日期:1992-09-01 00:00:00
abstract:AIMS:Antihistamines make up the first line of treatments against motion-sickness. Still, their efficacy and specific mechanism have come into question. The aim of this study was to investigate the effect of meclizine on motion-sensitivity. METHODS:This study was carried out as a triple-blinded randomized trial involvi...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14257
更新日期:2020-08-01 00:00:00