Asthma, Healthy
Conditions
Keywords
Monodisperse aerosols, Healthy Volunteers, Asthmatics, Pharmacokinetics, Randomized
Brief summary
Asthma is most effectively treated by delivering inhaled drugs from an inhaler (puffer) directly into the lungs. Inhaled steroids are used in asthmatic patients to dampen down lung inflammation, which unchecked, can often lead to patient symptoms. Inhalers deliver a mist containing particles of lots of different sizes (like hairsprays). Medical puffers used by patients produce a 'coarse' mist of drug particles, which have the potential for side effects, as different sized particles will reach different parts of the airways and include; the mouth, the throat, the windpipe, and the bloodstream (all places we do not want the inhaled drug to go - and can give rise to important side effects)and, the lungs (where we do want the drug to 'deposit'). Our aim in this study is to test an inhaled steroid by giving it to subjects as a 'fine' mist containing drug particles of nearly all one size using a research nebuliser (a Spinning Top Aerosol Generator). We shall use small, intermediate and large drug particle mists. We aim to find out how much of the drug goes to the blood stream for each particle mist and compare it with the standard puffers used in routine clinical practice. We hope this study will provide information to the rationale that by improving the efficiency of drug delivery (by changing drug particle size) one may improve inhaled drug delivery and ultimately, clinical patient benefit. Healthy volunteers and asthmatic patients will be recruited at the Royal Brompton Hospital London. The study is funded by GlaxoSmithKline, Research & Development, U.K.
Detailed description
The clinical trial is to investigate the pharmacokinetic effects (that is how much drug is in the blood) of Fluticasone Propionate (Flixotide), a commonly used steroid drug that is inhaled in patients with asthma. We will use standard clinical Flixotide Nebules that are used with clinical nebulisers (machines used in hospital and at home - to deliver drug to patients with asthma). Current clinical nebulisers deliver a 'coarse' mist of drug, which has the potential for side effects and this is an important consideration with steroids. These Flixotide nebules will be used to deliver the drug (fluticasone propionate) as monodisperse aerosol clouds (that is the drug will be delivered as a 'fine' mist cloud to patients). In order to deliver the drug as a monodisperse aerosol, the Flixotide Nebules will be used with a spinning top aerosol (a large research nebuliser machine)which is able to selectively generate aerosol clouds that have a fine mist. A fine mist cloud leads to less deposition in the throat of the patients and a greater control of the inhaled drug reaching the lungs, and fine mist drug clouds have the potential to reduce side effects. We will also compare this to the use of a standard routine clinical dose of a Flixotide metered-dose inhaler ( a 'press and breathe' inhaler) with a spacer (plastic bubble on the end of an inhaler) delivered to patients.
Interventions
DRUGFluticasone Propionate_1.5
Dose 50 micrograms (total dose), Monodisperse aerosol with particle size of drug 1.5 micros, inhaled
DRUGFluticasone Propionate_3
Dose 50 micrograms (total dose), Monodisperse aerosol with particle size of drug 3.0 microns, inhaled
DRUGFluticasone Propionate_6
Dose 50 micrograms (total dose), Monodisperse aerosol with particle size of drug 6.0 microns, inhaled
DRUGFP From Active 250 ug MDI Inhaler
Monodisperse aerosols inhaled of Fluticasone Propionate at 250micrograms dose with active MDI inhaler
Sponsors
Imperial College London
Study design
Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
BASIC_SCIENCE
Masking
DOUBLE (Subject, Outcomes Assessor)
Intervention model description
Two groups (asthma and healthy) go through different particle size of monodisperse aerosol treatments
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Healthy Volunteers Participants will be included if they meet all of the following inclusion criteria 1. Healthy non smoking participants 2. Male or female aged above 18 years 3. No history of respiratory disease 4. Normal baseline spirometry as predicted for age, sex and height (we have excluded those with abnormal spirometry as this may indicate an underlying lung condition that needs attention, and such participants will be told their result and with their consent, the information will be forwarded to their General Practitioner, as part of the safety and well being of the research participant. 5. No history of allergic disease i.e., a negative skin prick test 6. Participants who are free from significant cardiac, gastrointestinal, hepatic, renal, hematological, neurological and psychiatric disease. 7. Not taking any regular medication that is contraindicated in those about to receive fluticasone propionate (as indicated in the British National Formularly); other than the oral contraceptive pill. Asthmatics 1. Male or females aged greater than 18 years with a documented history of reversible airways disease responding to beta2-adrenergic therapy. 2. Asthmatic patients who are free from significant cardiac, gastrointestinal, hepatic, renal, hematological, neurological and psychiatric disease. 3. Patients who are stabilized on 500 micrograms or less of inhaled beclomethasone dipropionate or alternative inhaled corticosteroid (budesonide or ciclesonide). 4. Patients who are able and willing to give written informed consent to take part in the study 5. Not taking any regular medication that is contraindicated in those about to receive fluitcasone propionate (as indicated in the British National Formularly); other than the oral contraceptive pill.
Exclusion criteria
Healthy Volunteers and Asthmatics 1. Those requiring maintenance oral or parenteral corticosteroid therapy for their airways disease or patients who have ceased maintenance oral or parenteral corticosteroid therapy within the four weeks prior to visit 1 2. Those requiring greater than 500 micrograms of inhaled beclomethasone dipropionate or alternative inhaled corticosteroid (budesonide or ciclesonide). 3. Subjects that have received inhaled or intravenous fluticasone propionate in the last 2 months. 4. Those whose reversible airways obstruction has been unstable in the last four weeks (indicated by any change in their maintenance therapy). 5. Those participants who have had a lower respiratory tract infection in the previous four weeks 6. Those who have donated 450ml blood or more within the previous 1 month. 7. Those who have a history of drug allergy which, in the opinion of the Unit Physician, contraindicates his/her participation in the study. 8. Any evidence of a positive pregnancy urine test for female volunteers or females who are pregnant or lactating or are likely to become pregnant during the trial. Women of child-bearing potential may be included in the study if, in the opinion of the investigator, they are taking adequate contraceptive precautions. 9. Participants with a known or suspected allergy to corticosteroids or any component of the formulations and/or Suspected hypersensitivity to inhaled corticosteroid (this will be asked directly at the screening visit). 10. Any patient with a contraindication to taking an inhaled steroid and specifically FP, listed in the British National Formularly will not be entered into this study 11. Those who have experienced an acute asthma exacerbation requiring emergency room treatment and/or hospitalization within one month of visit 1.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| AUC Fluticasone Propionate (FP) | 12 hours | The main outcome measure is the concentration of Fluticasone Propionate in blood following inhalation of the dose. This will be found by calculating the area under the curve of concentration versus time 0 and 12 hours. |
Countries
United Kingdom
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Asthma Patients Recruited Asthma patients | 15 |
| Healthy Volunteers Recruited healthy volunteers | 15 |
| Total | 30 |
Baseline characteristics
| Characteristic | Healthy Volunteers | Total | Asthma Patients |
|---|---|---|---|
| Age, Continuous | 35 years STANDARD_DEVIATION 10.5 | 35 years STANDARD_DEVIATION 11 | 35 years STANDARD_DEVIATION 11.8 |
| Race and Ethnicity Not Collected | — | 0 Participants | — |
| Region of Enrollment United Kingdom | 15 participants | 30 participants | 15 participants |
| Sex: Female, Male Female | 10 Participants | 17 Participants | 7 Participants |
| Sex: Female, Male Male | 5 Participants | 13 Participants | 8 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk | EG003 affected / at risk | EG004 affected / at risk | EG005 affected / at risk | EG006 affected / at risk | EG007 affected / at risk |
|---|---|---|---|---|---|---|---|---|
| deaths Total, all-cause mortality | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 |
| other Total, other adverse events | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 |
| serious Total, serious adverse events | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 | 0 / 15 |
Outcome results
Primary
AUC Fluticasone Propionate (FP)
The main outcome measure is the concentration of Fluticasone Propionate in blood following inhalation of the dose. This will be found by calculating the area under the curve of concentration versus time 0 and 12 hours.
Time frame: 12 hours
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| FP From Active 250 ug MDI Inhaler Asthma | AUC Fluticasone Propionate (FP) | 188.2 pg.h/ml |
| FP 50ug 1.5um Asthma | AUC Fluticasone Propionate (FP) | 756 pg.h/ml |
| FP 50ug 3um Asthma | AUC Fluticasone Propionate (FP) | 978 pg.h/ml |
| FP 50ug 6um Asthma | AUC Fluticasone Propionate (FP) | 380.5 pg.h/ml |
| FP From Active 250 ug MDI Inhaler HV | AUC Fluticasone Propionate (FP) | 172.3 pg.h/ml |
| FP 50ug 1.5um HV | AUC Fluticasone Propionate (FP) | 740 pg.h/ml |
| FP 50ug 3um HV | AUC Fluticasone Propionate (FP) | 934.6 pg.h/ml |
| FP 50ug 6um HV | AUC Fluticasone Propionate (FP) | 250.4 pg.h/ml |
p-value: <0.05ANOVA