Effect of Brovana and Tiotropium in Chronic Obstructive Pulmonary Disease (COPD)
Condition: COPD
Study type: Interventional
Phase: Phase 4

Summary: 
      This will be a double-blind crossover trial in 20 patient with stable COPD. Data from this
      study will provide proof-of-concept information on whether the (anticipated) additional
      bronchodilator effect of Brovana added to tiotropium will lead to a meaningful improvement in
      the patient-centered outcome, exercise capacity. This study will only evaluate the effects of
      short-term (1-week) administration of Brovana. If results are positive, it would provide
      preliminary data for further, multicenter investigations.
    

Detailed description: 
      Hypotheses to be tested:

      Brovana nebulized twice daily added to maintenance inhaled tiotropium therapy in stable COPD
      patients increases:

        1. Forced expiratory volume in 1 second (FEV1) at peak dose effect (approximately 2 hours
           after AM dosing in the laboratory)

        2. Resting and exercise hyperinflation at peak dose effect (inspiratory capacity (IC) at
           baseline and at iso-time during exercise testing; these measurements will be
           approximately 2 ¼ hours after AM dosing of tiotropium plus test drug.

        3. Exercise treadmill endurance time at peak dose effect (approximately 2 ¼ hours after AM
           dosing in the laboratory)

      Patients: Twenty patients will be studied

      Location: Section of Pulmonary and Critical Care, St. Francis Hospital & Medical Center,
      Hartford, CT

      Excluded drugs:

        1. Anticholinergic bronchodilators other than once-daily (AM) tiotropium at standard dose

        2. Long acting beta agonist bronchodilators

        3. Short acting beta agonist bronchodilators must be withheld within six hours of
           laboratory testing

      Allowed drugs:

        1. Inhaled steroids

        2. Oral steroids 10 mg/day or less, at stable dose for four weeks

      Removal of patients from study:

        1. Withdrawal of consent

        2. Documented oxygen desaturation < 85% or clinically significant problems (such as angina,
           significant electrocardiogram (ECG) changes, etc) during any exercise testing

        3. A significant adverse event

        4. Protocol violation including lack of adherence

      COPD exacerbations during study:

      If the patient experiences a COPD exacerbation during the study which requires a change in
      medication or an addition of medication (such as oral steroids or antibiotics) the study will
      be held until stability is reached. At that time, the study will resume, beginning with new,
      1-week treatment /testing corresponding to the study sequence when the exacerbation began. If
      the patient does not resume stability within four weeks or has a second exacerbation, the
      study will be terminated.

      Study design: This will be a double-blind, crossover, single-site study in COPD patients who
      are in stable condition. All patients in study randomized to test drug by Visit 2 will have
      been on steady-state tiotropium therapy, off commercial long-acting beta-agonists (LABA), and
      using prn short-acting beta-agonists (SABA). Only acute (i.e., 1-week) effects of Brovana
      will be studied. SABA will be withheld from midnight before testing on each day.

      Exercise testing and inspiratory capacity (IC) measurements Incremental and steady-state
      endurance testing will be performed on a treadmill in the Section of Pulmonary and Critical
      Care Medicine. The incremental test (Visit 1) will be performed to a symptom-limited maximum,
      with a goal to have the test duration over approximately 10 minutes. The protocol used for
      this will be from Porszasz et al using simultaneous increases in treadmill speed and incline,
      with settings based on estimated maximal workrate. Warm-up will be 1 mph at 1% grade. This
      will be followed at 30-second intervals by increases in speed and incline. Patients will have
      breath by breath measurements of expired air using our Sensormedics equipment, via a
      mouthpiece. IC measurements will also be measured at rest and at every minute into exercise.

      Endurance tests (Visit 2, 4, 5) will be at 75% of the maximal rate determined from the
      initial test. For exercise capacity, duration in exercise time will be the primary outcome
      variable. IC will be measured at rest and at every minute during exercise.

      An ECG will be performed before each exercise test, and continuous pulse oximetry will be
      monitored. A physician will be in attendance at each test.

      Primary Efficacy Variables:

        1. Change in FEV1 near peak effect (~ 2 hours of AM laboratory dosing of tiotropium plus
           test drug):

             1. The primary comparison will be Δ FEV1 (@ 2-hours after Tiotropium + Brovana minus
                pre-dose FEV1) versus Δ FEV1 (@2-hours after Tiotropium + Placebo minus pre-dose
                FEV1)

             2. The analysis will be performed using a repeated-measures design, PROC GLM Repeated,
                SAS:

        2. Change in treadmill endurance time at ~75% of maximum (Δ endurance time) Brovana versus
           placebo: from baseline testing on tiotropium alone compared to testing on tiotropium +
           study drug.

             1. The primary comparison will be Δ endurance time (@ 2 ¼ hours after Tiotropium +
                Brovana compared to tiotropium alone

             2. The analysis will be performed using a repeated-measures design, PROC GLM Repeated,
                SAS

        3. Change in static (resting), iso-time, and peak exercise IC measurements, which will be
           used as our estimates of hyperinflation; Brovana versus placebo: from baseline testing
           on tiotropium alone compared to testing on tiotropium + study drug.

           a. The primary co-comparisons will be: i. Δ IC at rest (static hyperinflation) (@ 2 ¼
           hours after Tiotropium + Brovana compared to tiotropium alone ii. Δ IC at iso-time
           (static hyperinflation) (@ 2 ¼ hours after Tiotropium + Brovana compared to tiotropium
           alone. We are not sure what iso-time we will use, but if all patients go six minutes
           into exercise, we will use the six minute mark.

           b. The analyses will be performed using a repeated-measures design, PROC GLM Repeated,
           SAS

      Sample Size Estimation The van Noord sited earlier powered their study assuming a ~ 140 mL
      standard deviation for paired differences in FEV1 (determined from earlier trials), a
      difference of ~ 50 mL, and a power of 0.90. They achieved a 150 mL (0.150 L) difference in
      FEV1. For our study, using a difference of 150 mL, a standard deviation of 140 mL, and a
      power of 0.80, 16 patients would be sufficient.

      In a study by O'Donnell et al the combination of fluticasone 250 mcg / salmeterol 50 mcg was
      compared to salmeterol alone and placebo. Outcome variables included spirometry, lung volumes
      and exercise endurance time at 75% of maximal on a cycle ergometer. The average improvement
      (compared to placebo) in FEV1 at Day 1 (taken from graph) was about 200 mL with both the
      combination and salmeterol. The treatment-difference improvement in exercise endurance time
      with the combination was 131 ± 31 seconds (p. < 0.004), representing a 22% improvement. For
      salmeterol alone it was 49 ± 37 seconds. Our study would use a treadmill rather than a cycle
      ergometer; this will probably lead to more dyspnea-limitation than leg fatigue limitation. We
      predict the Δ FEV1 at two hours post dosing (compared to tiotropium alone) with Brovana +
      tiotropium in our study will ~ 150 mL - a Δ not too dissimilar to the O'Donnell study Δ. To
      detect a 90 second difference in endurance time (1/2 way between 131 seconds and 49 seconds),
      and assuming a standard deviation (SD) of 35 seconds, our study would be amply powered.

      Study Sequence

      Visit 1:

        1. Informed consent obtained

        2. Inclusion/exclusion criteria met

        3. History and physical examination performed

        4. Post-bronchodilator spirometry for inclusion criteria

        5. Patient started on tiotropium, if necessary; tiotropium dispensed, if necessary

        6. If necessary: long acting bronchodilators (LABA) discontinued, ipratropium discontinued

        7. Levalbuterol MDI dispensed for prn use

        8. Appointment given for Visit 1

      Visit 2: 1 day (for patients already on tiotropium) to 1 week (those starting tiotropium)
      after Visit 1:

        1. Brief history and limited physical

        2. Spirometry on maintenance tiotropium, before AM dosing and after having SABA withheld
           for ~ 6 hours

        3. Incremental treadmill endurance test

        4. Patient instructed to continue taking tiotropium once daily in the morning (qAM) and
           levalbuterol MDI prn

        5. Appointment for 2-week follow-up

      Visit 3: 1 week after Visit 2, after maintenance tiotropium

        1. Brief history and limited physical

        2. Pre-bronchodilator spirometry (on maintenance tiotropium, levalbuterol withheld)

        3. Tiotropium given (open label)

        4. Spirometry 2 hours after tiotropium dosing

        5. ECG 2 ¼ hour after tiotropium dosing

        6. Endurance treadmill endurance test (including IC measurements) 2 ¼ hour after open-label
           tiotropium dosing

        7. Nebulizer dispensed

        8. Blinded Test drug # 1 dispensed (Brovana or placebo, 20 unit doses), instructions to
           take it via nebulizer bid, tiotropium continued qAM, levalbuterol MDI continued prn

        9. Appointment for 1 week follow-up

      Visit 4: 1 weeks after Visit 3, after test drug # 1

        1. Brief history and limited physical

        2. Pre-dosing spirometry (on maintenance tiotropium and Test Drug #1, levalbuterol
           withheld)

        3. Tiotropium and Test Drug # 1 given

        4. Spirometry 2 hours after above dosing

        5. ECG 2 ¼ hour after above dosing

        6. Endurance treadmill endurance test 2 ¼ hour after above dosing

        7. Begin wash-out period: Tiotropium open-label plus prn levalbuterol continued; placebo
           given via nebulizer, to be taken bid (this part is single-blinded)

        8. Appointment for 1 week follow-up

      Visit 5: 1 week after Visit 4, after washout

        1. Brief history and limited physical

        2. Spirometry in AM

        3. Blinded Test drug # 2 dispensed (Brovana or placebo, 20 unit doses), instructions to
           take it via nebulizer bid, tiotropium continued qAM, levalbuterol MDI continued prn

        4. Appointment for 1 week follow-up

      Visit 6: 1 week after Visit 5, after test drug # 2

        1. Brief history and limited physical

        2. Pre-dosing spirometry (on maintenance tiotropium and Test Drug #2, levalbuterol
           withheld)

        3. Tiotropium and Test Drug #2 given

        4. Spirometry 2 hours after above dosing

        5. ECG 2 ¼ hour after above dosing

        6. Endurance treadmill endurance test and IC measurements 2 ¼ hour after above dosing

        7. Study terminated
    

Intervention name(s): Arformoterol (Brovana); Placebo
Intervention type(s): Drug; Drug
Intervention description(s): twice daily via nebulizer added to maintenance daily tiotropium; Placebo twice daily for 1 week (added to maintenance tiotropium)
Intervention MeSH terms: Formoterol Fumarate
Allocation: Randomized
Intervention model: Crossover Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary purpose: Treatment
Keywords: COPD; Bronchodilator; arformoterol; tiotropium