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Pharmacodynamics and pharmacokinetics of fluticasone furoate/vilanterol in healthy Chinese subjects.

ABSTRACT: STUDY OBJECTIVE:To investigate the pharmacodynamic and pharmacokinetic profiles of fluticasone furoate (FF)/vilanterol (VI) - a fixed-dose combination of an inhaled corticosteroid (ICS) and a long-acting ?2 -agonist for the treatment of asthma and chronic obstructive pulmonary disease - after single and repeat administration in healthy Chinese subjects. DESIGN:Double-blind, placebo-controlled, single-site, randomized, four-way crossover study. SETTING:The Clinical Pharmacological Research Centre at Peking Union Medical College Hospital [PUMCH]) in Beijing, China. SUBJECTS:Sixteen healthy, nonsmoking Chinese adults. INTERVENTION:Subjects were randomized to receive FF/VI 50/25, 100/25, or 200/25 ?g, or placebo once/daily in the morning, delivered by the Ellipta dry powder inhaler, for 7 consecutive days. The subjects then received the other three treatments, with each treatment period separated by a 7-day washout period. MEASUREMENTS AND MAIN RESULTS:The co-primary outcome measures reflected pharmacodynamic responses relating to recognized class effects of the two drug classes: reduced serum cortisol level (ICSs), and increased Fridericia's corrected QT interval (QTcF) and reduced serum potassium level (long-acting ?2 -agonists). Co-primary pharmacodynamic endpoints were 0-24-hour weighted mean serum cortisol level on day 7 (cortisol0-24 hr, Day 7 ), and 0-4-hour weighted mean and maximum QTcF and weighted mean and minimum serum potassium level on days 1 and 7. Fluticasone furoate and VI plasma concentrations, derived pharmacokinetic parameters, and safety were also assessed. Of the 16 subjects randomized, 15 completed the study. Reductions in cortisol0-24 hour, Day 7 of 15% and 25% were observed with FF/VI 100/25 and 200/25 ?g, respectively, versus placebo. Minor increases (< 10 msec) in maximum QTcF on day 7 were seen with FF/VI 50/25 and 100/25 ?g but not with 200/25 ?g. Slight decreases in serum potassium level were only observed in subjects receiving FF/VI 50/25 ?g on day 1 and FF/VI 50/25 and 200/25 ?g on day 7. Fluticasone furoate accumulation (day 7 vs day 1) for FF/VI 50/25-200/25 ?g ranged from 38 to 54% for maximum observed concentration and 63-71% for area under the concentration-time curve from 0 to 4 hours. Fluticasone furoate pharmacokinetics were less than dose proportional. The VI pharmacokinetic profiles were similar for all three FF/VI doses. Adverse events were all mild in intensity and were reported by 13 (81%) of the 16 subjects. CONCLUSION:In healthy Chinese subjects, minimal and non-clinically relevant ?-adrenergic pharmacodynamic effects were observed with FF/VI doses ranging from 50/25 to 200/25 ?g. FF dose-dependent reductions in serum cortisol levels of 15-25% were seen after administration of FF/VI 100/25 and 200/25 ?g. FF/VI was safe and well tolerated in these subjects at doses ranging from 50/25 to 200/25 ?g.

SUBMITTER: Chen X

PROVIDER: S-EPMC4744690 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature

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Project description:AIM:To investigate the effects of the cytochrome P450 3A4 (CYP3A4) inhibitor ketoconazole on the pharmacokinetics (PK) and pharmacodynamics of fluticasone furoate (FF) and vilanterol trifenatate (VI). METHODS:Two double-blind, randomized, placebo-controlled, two-way crossover studies in healthy subjects. In study 1, subjects received single doses of ketoconazole (400 mg) or placebo on days 1-6, with a single dose of inhaled VI (25 ?g) on day 5. Pharmacodynamic and PK data were obtained up to 48 h following the VI dose. In study 2, subjects received once daily ketoconazole (400 mg) or placebo for 11 days, with FF/VI (200/25??g) for the final 7 days. Pharmacodynamic and PK data were obtained up to 48 h following the day 11 dose. RESULTS:In study 1, there was no effect of co-administration of ketoconazole and VI on pharmacodynamic or PK parameters. In study 2, co-administration of ketoconazole and FF/VI had no effect on 0-4 h maximal heart rate or minimal blood potassium {treatment difference [90% confidence interval (CI)] -0.6 beats min(-1) (-5.8, 4.5) and 0.04 mmol l(-1) (-0.03, 0.11), respectively}, whilst there was a 27% decrease in 24 h weighted mean serum cortisol [treatment ratio (90% CI) 0.73 (0.62, 0.86)]. Co-administration of ketoconazole increased [percentage change (90% CI)] FF area under the curve (0-24) and maximal plasma concentration by 36% (16, 59) and 33% (12, 58), respectively, and VI area under the curve (0-t') and maximal plasma concentration by 65% (38, 97) and 22% (8, 38), respectively. CONCLUSION:Co-administration of FF/VI or VI with ketoconazole resulted in a less than twofold increase in systemic exposure to FF and VI. There was no increase in ?-agonist systemic pharmacodynamic effects, while serum cortisol was decreased by 27%. Co-administration of FF/VI with strong CYP3A4 inhibitors has the potential to increase systemic exposure to both fluticasone furoate and vilanterol, which could lead to an increase in the potential for adverse reactions.

Project description:Previous pharmacokinetic studies of the inhaled corticosteroid, fluticasone furoate (FF), and the long-acting, beta2-receptor agonist, vilanterol (VI) have been performed in relatively small populations using non-compartmental pharmacokinetic methods and censored data (due to low drug exposure relative to assay sensitivity). This paper presents a population pharmacokinetic analysis, utilizing pooled concentration-time data from clinical studies in healthy subjects and from global trials in patients with chronic obstructive pulmonary disease (COPD). The objective of this analysis was to characterize the population pharmacokinetics of FF and VI following once-daily inhalation dosing of FF/VI or the individual components (FF and VI) and to identify significant covariates that impact systemic exposure to FF and VI in this population.Population pharmacokinetic methods that maximize the likelihood of all data were developed to describe systemic exposure to FF and VI following once-daily FF/VI, FF, or VI, and to identify significant covariates that impact the pharmacokinetics. COPD patients (N = 1225 for the FF analysis and N = 1091 for the VI analysis; 94 and 93 % of total data, respectively) and healthy subjects contributed to the analysis.FF data were described by a two-compartment model with first-order absorption and elimination. The population grouping "race" was a significant covariate on inhaled clearance (CL/F). The area under the curve over 24 h (AUC0-24) for FF was higher for East Asian, Japanese, and South East Asian (average 23-30 %) and Asian Central, White Arabic, American Indian/Native Alaskan, and 'other' (10-26 %) subjects compared with White/Caucasians. VI pharmacokinetics were described by a three-compartment model with zero-order absorption and first-order elimination. Significant demographic covariates identified to affect pharmacokinetics of VI were age [on CL/F and central volume (V 1/F)], bodyweight (on CL/F), sex and smoking (on V 1/F).While significant effects of the covariates were observed in this study, the magnitude of these effects on systemic exposure is not large enough to warrant FF/VI dosage adjustment in patients with COPD.

Project description:BACKGROUND:This analysis of the IMPACT study assessed the cardiovascular (CV) safety of single-inhaler triple therapy with fluticasone furoate/umeclidinium/vilanterol (FF/UMEC/VI) versus FF/VI and UMEC/VI dual therapy. METHODS:IMPACT was a 52-week, randomized, double-blind, multicenter Phase III study comparing the efficacy and safety of FF/UMEC/VI 100/62.5/25 mcg with FF/VI 100/25 mcg or UMEC/VI 62.5/25 mcg in patients ?40?years of age with symptomatic chronic obstructive pulmonary disease (COPD) and??1 moderate/severe exacerbation in the previous year. The inclusion criteria for the study were intentionally designed to permit the enrollment of patients with significant concurrent CV disease/risk. CV safety assessments included proportion of patients with and exposure-adjusted rates of on-treatment CV adverse events of special interest (CVAESI) and major adverse cardiac events (MACE), as well as time-to-first (TTF) CVAESI, and TTF CVAESI resulting in hospitalization/prolonged hospitalization or death. RESULTS:Baseline CV risk factors were similar across treatment groups. Overall, 68% of patients (n =?7012) had ?1 CV risk factor and 40% (n =?4127) had ?2. At baseline, 29% of patients reported a current/past cardiac disorder and 58% reported a current/past vascular disorder. The proportion of patients with on-treatment CVAESI was 11% for both FF/UMEC/VI and UMEC/VI, and 10% for FF/VI. There was no statistical difference for FF/UMEC/VI versus FF/VI or UMEC/VI in TTF CVAESI (hazard ratio [HR]: 0.98, 95% confidence interval [CI]: 0.85, 1.11; p =?0.711 and HR: 0.92, 95% CI: 0.78, 1.08; p =?0.317, respectively) nor TTF CVAESI leading to hospitalization/prolonged hospitalization or death (HR: 1.19, 95% CI: 0.93, 1.51; p =?0.167 and HR: 0.96, 95% CI: 0.72, 1.27; p =?0.760, respectively). On-treatment MACE occurred in ?3% of patients across treatment groups, with similar prevalence and rates between treatments. CONCLUSIONS:In a symptomatic COPD population with a history of exacerbations and a high rate of CV disease/risk, the proportion of patients with CVAESI and MACE was 10-11% and 1-3%, respectively, across treatment arms, and the risk of CVAESI was low and similar across treatment arms. There was no statistically significant increased CV risk associated with the use of FF/UMEC/VI versus FF/VI or UMEC/VI, and UMEC/VI versus FF/VI. TRIAL REGISTRATION:NCT02164513 (GSK study number CTT116855).

Project description:BACKGROUND:Single-inhaler fluticasone furoate/umeclidinium/vilanterol (FF/UMEC/VI) 100/62.5/25 ?g has been shown to improve lung function and health status, and reduce exacerbations, versus budesonide/formoterol in patients with chronic obstructive pulmonary disease (COPD). We evaluated the non-inferiority of single-inhaler FF/UMEC/VI versus FF/VI?+?UMEC using two inhalers. METHODS:Eligible patients with COPD (aged ?40 years; ?1 moderate/severe exacerbation in the 12 months before screening) were randomized (1:1; stratified by the number of long-acting bronchodilators [0, 1 or 2] per day during run-in) to receive 24-week FF/UMEC/VI 100/62.5/25 ?g and placebo or FF/VI 100/25 ?g?+?UMEC 62.5 ?g; all treatments/placebo were delivered using the ELLIPTA inhaler once-daily in the morning. Primary endpoint: change from baseline in trough forced expiratory volume in 1 s (FEV1) at Week 24. The non-inferiority margin for the lower 95% confidence limit was set at -?50 mL. RESULTS:A total of 1055 patients (844 [80%] of whom were enrolled on combination maintenance therapy) were randomized to receive FF/UMEC/VI (n?=?527) or FF/VI?+?UMEC (n?=?528). Mean change from baseline in trough FEV1 at Week 24 was 113 mL (95% CI 91, 135) for FF/UMEC/VI and 95 mL (95% CI 72, 117) for FF/VI?+?UMEC; the between-treatment difference of 18 mL (95% CI -13, 50) confirmed FF/UMEC/VI's was considered non-inferior to FF/VI?+?UMEC. At Week 24, the proportion of responders based on St George's Respiratory Questionnaire Total score was 50% (FF/UMEC/VI) and 51% (FF/VI?+?UMEC); the proportion of responders based on the Transitional Dyspnea Index focal score was similar (56% both groups). A similar proportion of patients experienced a moderate/severe exacerbation in the FF/UMEC/VI (24%) and FF/VI?+?UMEC (27%) groups; the hazard ratio for time to first moderate/severe exacerbation with FF/UMEC/VI versus FF/VI?+?UMEC was 0.87 (95% CI 0.68, 1.12). The incidence of adverse events was comparable in both groups (48%); the incidence of serious adverse events was 10% (FF/UMEC/VI) and 11% (FF/VI?+?UMEC). CONCLUSIONS:Single-inhaler triple therapy (FF/UMEC/VI) is non-inferior to two inhalers (FF/VI?+?UMEC) on trough FEV1 change from baseline at 24 weeks. Results were similar on all other measures of efficacy, health-related quality of life, and safety. TRIAL REGISTRATION:GSK study CTT200812; ClinicalTrials.gov NCT02729051 (submitted 31 March 2016).

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Pharmacodynamics and pharmacokinetics of fluticasone furoate/vilanterol in healthy Chinese subjects.

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