Investigation of two treatment regimens in adults with mild asthma

<p>Introduction In adults with mild-moderate asthma, poor adherence to daily maintenance inhaled corticosteroids (ICS) leads to increased asthma symptoms and risk of asthma exacerbations. There is evidence that symptom-driven use of a combination ICS plus a fast-onset long-acting beta2-agonist (LABA) inhaler taken as needed may be an alternative to daily maintenance ICS plus as-needed short-acting beta2-agonists (SABA). Through four studies: The PRACTICAL study (a randomised controlled trial) and three sub-studies nested within it, this thesis aims to investigate the efficacy of as-needed ICS-formoterol (a fast-onset LABA), exposure to and patterns of ICS and beta2-agonist use, and patient preferences for and priorities concerning their asthma management. Methods The PRACTICAL study was a 52 week, open label, parallel group, multicentre, superiority, randomised controlled trial conducted at 15 sites throughout New Zealand. Adults aged 18-75 with a diagnosis of asthma who were taking SABA for symptom relief with or without low dose maintenance ICS were recruited. Participants were randomised 1:1 to either as-needed budesonide-formoterol (200/6mcg) one actuation for symptom relief or budesonide (200mcg) one actuation twice a day plus as-needed terbutaline (250mcg) two actuations for symptom relief. A sub-group of 110 participants had electronic inhaler monitors attached to their study inhalers which captured the time and date of every inhaler actuation. At their final study visit a total of 407 participants were eligible to complete a survey on their treatment preferences and experiences of their study randomised treatment, and a discrete choice experiment to determine their priorities for attributes of asthma management including; treatment regimen, shortness of breath, steroid dose and likelihood of an asthma flare-up. Results The PRACTICAL study found the rate of severe exacerbations per patient per year was lower in participants randomised to as-needed budesonide-formoterol than participants randomised to maintenance budesonide (absolute rate per patient per year 0.119 vs 0.172; relative rate 0.69; 95%CI 0.48-1.00; p=0.049). Within the electronic monitoring sub-study, exposure to ICS was significantly lower in the group randomised to as-needed budesonide-formoterol with a mean daily ICS dose of 176.0mcg versus 302.5mcg in those randomised to maintenance budesonide (difference -126.5mcg per day; 95%CI -171.0 to -81.9; p<0.001). Use of as-needed budesonide-formoterol was associated with extended periods of no ICS use (median 156 days vs 22 days respectively) and more days where ≥4, 6 or 8 actuations of ICS were taken than maintenance budesonide. Participants’ preference for either as-needed or maintenance treatment was strongly associated with randomised treatment; 90% randomised to as-needed budesonideformoterol preferred their randomised treatment compared to 60% of those randomised to maintenance budesonide, odds ratio for association between randomised treatment and preference was 13.3 (95%CI 7.1 to 24.7; p<0.001). The DCE found that amount of shortness of breath was the most important attribute of asthma treatment to all participants. However, the relative importance of other attributes, particularly type of treatment regimen, varied depending on whether the participants had previously stated a preference for as-needed or maintenance treatment. Discussion In adults with mild-moderate asthma, as-needed budesonide-formoterol is more effective at preventing severe asthma exacerbations than maintenance budesonide at a significantly lower exposure to ICS, despite long periods of no ICS use. This suggests that timing of ICS dose and titrating it in response to symptoms is more important than total dose. If participants have experienced as-needed budesonide-formoterol, they prefer it over maintenance budesonide suggesting this new approach to asthma treatment will be acceptable to patients. Control of shortness of breath was the most important attribute of asthma treatment to all patients. However, participants who preferred as-needed treatment were more willing to trade-off likelihood of an asthma flare up and steroid dose for their preferred treatment regimen. Knowledge of patient preferences and priorities for treatment, together with knowledge of regimen characteristics can be used in discussion with patients to determine the most appropriate regimen for them.</p>

Investigation of two treatment regimens in adults with mild asthma

<p>Introduction In adults with mild-moderate asthma, poor adherence to daily maintenance inhaled corticosteroids (ICS) leads to increased asthma symptoms and risk of asthma exacerbations. There is evidence that symptom-driven use of a combination ICS plus a fast-onset long-acting beta2-agonist (LABA) inhaler taken as needed may be an alternative to daily maintenance ICS plus as-needed short-acting beta2-agonists (SABA). Through four studies: The PRACTICAL study (a randomised controlled trial) and three sub-studies nested within it, this thesis aims to investigate the efficacy of as-needed ICS-formoterol (a fast-onset LABA), exposure to and patterns of ICS and beta2-agonist use, and patient preferences for and priorities concerning their asthma management. Methods The PRACTICAL study was a 52 week, open label, parallel group, multicentre, superiority, randomised controlled trial conducted at 15 sites throughout New Zealand. Adults aged 18-75 with a diagnosis of asthma who were taking SABA for symptom relief with or without low dose maintenance ICS were recruited. Participants were randomised 1:1 to either as-needed budesonide-formoterol (200/6mcg) one actuation for symptom relief or budesonide (200mcg) one actuation twice a day plus as-needed terbutaline (250mcg) two actuations for symptom relief. A sub-group of 110 participants had electronic inhaler monitors attached to their study inhalers which captured the time and date of every inhaler actuation. At their final study visit a total of 407 participants were eligible to complete a survey on their treatment preferences and experiences of their study randomised treatment, and a discrete choice experiment to determine their priorities for attributes of asthma management including; treatment regimen, shortness of breath, steroid dose and likelihood of an asthma flare-up. Results The PRACTICAL study found the rate of severe exacerbations per patient per year was lower in participants randomised to as-needed budesonide-formoterol than participants randomised to maintenance budesonide (absolute rate per patient per year 0.119 vs 0.172; relative rate 0.69; 95%CI 0.48-1.00; p=0.049). Within the electronic monitoring sub-study, exposure to ICS was significantly lower in the group randomised to as-needed budesonide-formoterol with a mean daily ICS dose of 176.0mcg versus 302.5mcg in those randomised to maintenance budesonide (difference -126.5mcg per day; 95%CI -171.0 to -81.9; p<0.001). Use of as-needed budesonide-formoterol was associated with extended periods of no ICS use (median 156 days vs 22 days respectively) and more days where ≥4, 6 or 8 actuations of ICS were taken than maintenance budesonide. Participants’ preference for either as-needed or maintenance treatment was strongly associated with randomised treatment; 90% randomised to as-needed budesonideformoterol preferred their randomised treatment compared to 60% of those randomised to maintenance budesonide, odds ratio for association between randomised treatment and preference was 13.3 (95%CI 7.1 to 24.7; p<0.001). The DCE found that amount of shortness of breath was the most important attribute of asthma treatment to all participants. However, the relative importance of other attributes, particularly type of treatment regimen, varied depending on whether the participants had previously stated a preference for as-needed or maintenance treatment. Discussion In adults with mild-moderate asthma, as-needed budesonide-formoterol is more effective at preventing severe asthma exacerbations than maintenance budesonide at a significantly lower exposure to ICS, despite long periods of no ICS use. This suggests that timing of ICS dose and titrating it in response to symptoms is more important than total dose. If participants have experienced as-needed budesonide-formoterol, they prefer it over maintenance budesonide suggesting this new approach to asthma treatment will be acceptable to patients. Control of shortness of breath was the most important attribute of asthma treatment to all patients. However, participants who preferred as-needed treatment were more willing to trade-off likelihood of an asthma flare up and steroid dose for their preferred treatment regimen. Knowledge of patient preferences and priorities for treatment, together with knowledge of regimen characteristics can be used in discussion with patients to determine the most appropriate regimen for them.</p>

Global Initiative for Asthma (GINA) Strategy 2021 - Executive summary and rationale for key changes

The Global Initiative for Asthma (GINA) Strategy Report provides clinicians with an annually updated evidence-based strategy for asthma management and prevention, which can be adapted for local circumstances (e.g., medication availability). This article summarizes key recommendations from GINA 2021, and the evidence underpinning recent changes.GINA recommends that asthma in adults and adolescents should not be treated solely with short-acting beta2-agonist (SABA), because of the risks of SABA-only treatment and SABA overuse, and evidence for benefit of inhaled corticosteroids (ICS). Large trials show that as- needed combination ICS-formoterol reduces severe exacerbations by >60% in mild asthma compared with SABA alone, with similar exacerbation, symptom, lung function and inflammatory outcomes as daily ICS plus as-needed SABA.Key changes in GINA 2021 include division of the treatment figure for adults and adolescents into two tracks. Track 1 (preferred) has low-dose ICS-formoterol as the reliever at all steps: as-needed only in Steps 1-2 (mild asthma), and with daily maintenance ICS-formoterol (maintenance-and-reliever therapy, MART) in Steps 3-5. Track 2 (alternative) has as-needed SABA across all steps, plus regular ICS (Step 2) or ICS-long-acting beta2-agonist (LABA) (Steps 3-5). For adults with moderate-to-severe asthma, GINA makes additional recommendations in Step 5 for add-on long-acting muscarinic antagonists and azithromycin, with add-on biologic therapies for severe asthma. For children 6-11 years, new treatment options are added at Steps 3-4.Across all age-groups and levels of severity, regular personalized assessment, treatment of modifiable risk factors, self-management education, skills training, appropriate medication adjustment and review remain essential to optimize asthma outcomes.

Budesonide-Glycopyrronium-Formoterol Fumarate Dihydrate (Breztri Aerosphere)

CADTH recommends that Breztri Aerosphere be reimbursed by public drug plans for the treatment of chronic obstructive pulmonary disease (COPD), including chronic bronchitis and/or emphysema if certain conditions are met. Breztri Aerosphere should only be covered to treat patients who are not controlled on optimal dual inhaled therapy for COPD. Breztri Aerosphere should be reimbursed similar to Trelegy Ellipta. The price of Breztri Aerosphere should not exceed the drug program cost with the least-costly fixed-dose inhaled corticosteroid/long-acting muscarinic antagonist/long-acting beta2-agonist (ICS/LAMA/LABA) triple therapy combination for the same indication.

Beta2-adrenoceptor agonist salbutamol increases leg glucose uptake and metabolic rate but not muscle glycogen resynthesis in recovery from resistance exercise of the quadriceps in lean young men

Content: Beta2-agonists evoke potent acute increases in peripheral glucose uptake and energy expenditure at rest. Exercise has been shown to blunt these effects. Whether this attenuation is extended into recovery from exercise is unknown. Objective: To examine the effect of beta2-agonists on leg glucose uptake and leg metabolic rate in recovery from exercise. Design: In a randomized, placebo-controlled, cross-over study using arteriovenous balance technique and analysis of thigh muscle biopsies we investigated the effect of 24mg oral salbutamol (a selective beta2-agonist) on leg glucose, oxygen, and lactate at rest, during exercise, and in recovery, as well as on muscle glycogen resynthesis. Participants: Healthy, lean, young men (n=12). Results: Leg glucose uptake tended to be two-fold higher at rest (0.22+/-0.12mmol/min, P=0.06). Accumulated leg glucose uptake was higher in recovery (21.1+/-6mmol, P=0.018) with salbutamol, but not during exercise. Leg oxygen uptake was 80% greater at rest (11+/-2.1mmol/min, P<0.01). Accumulated leg oxygen uptake was higher in recovery (1755+/-348mL, P<0.01) with salbutamol, but not during exercise. Muscle glycogen was lower with salbutamol 0.5h (109+/-25mmol/mg dry-weight, P<0.01) and 5h (101+/-19mmol/mg dry-weight, P<0.01) into recovery, suggestive of augmented glycogen utilization during exercise. There was no difference in glycogen resynthesis or glycogen synthase activity in the 5-hour recovery period with salbutamol. Conclusions: These findings suggest that while resistance exercise confounds the augmentation of leg glucose uptake and metabolic rate induced by beta2-agonist at rest, this suppression is not conserved into recovery from exercise.

Single inhaler triple therapy in COPD – all that glitters is not gold

Dear Editor, The recent studies on combination triple therapy of inhaled corticosteroid, long acting beta2 agonist and long-acting muscarinic antagonist (ICS-LABA-LAMA) in COPD have consistently demonstrated an improvement in exacerbation frequency and/or improvement of lung function...