Back to resultsA Short Term Open, Randomized Cross-over Trial Exploring the Effect of Carbonic Anhydrase Inhibition by Acetazolamide on Sleep Apnea Associated Hypertension and Vascular Dysfunction
Primary Purpose
Obstructive Sleep Apnea, Sleep-Disordered Breathing, Blood Pressure
Status
Completed
Phase
Phase 2
Locations
Sweden
Study Type
Interventional
Intervention
Acetazolamide
nasal Continuous Positive Airway Pressure (nCPAP)
Sponsored by
About this trial
This is an interventional treatment trial for Obstructive Sleep Apnea focused on measuring Acetazolamide, Zonegran, Obstructive Sleep apnea, Apnea, Respiration Disorders, Sleep Disorders, Cardiovascular, Hypertension, Carbonic Anhydrase, Carbonic Anhydrase Inhibitors, Enzyme Inhibitors, Sulfonamides, Therapeutic Uses, Pharmacologic Actions, Vascular stifness
Eligibility Criteria
Inclusion Criteria:
- Provision of informed consent prior to any study specific procedures
- Males 18 to 75 years
- An Apnea-Hypopnea Index (AHI)>15 and an Epworth Sleepiness Scale score (ESS)>6 as verified by a PSG recording.
- Patients with established hypertension (systolic/diastolic blood pressure >= 160/95, either systolic or diastolic accounted for).
- Clinically normal physical findings and laboratory values, as judged by the investigator
- Body mass index >= 35 kg/m2
Exclusion Criteria:
- Hypersensitivity to sulfonamides or acetazolamide-
- Patients with ongoing medication with other sulphonamides or patients any specific antihypertensive treatment.
- History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity.
- Subjects with a seizure disorder
- Patients with clinically verified central sleep apnea
- Clinically significant renal (serum creatinine >2.0 mg/dL or >130 micromol/L), neurological, metabolic (e.g. Type 1 or 2 diabetes), haematological or hepatic disease (ASAT or ALAT >2 times the upper limit of normal).
- Subjects with an occupational risk potentially exaggerated by daytime sleepiness such as handling complex machinery or professional driving
- Unstable angina pectoris, unstable hypertension (or poorly controlled diabetes (HbA1C < 52 mmoles/mol, or fasting plasma glucose >7 mmoles/l).
- Clinically significant congestive heart failure.
- Myocardial infarction or coronary vessel intervention within the previous 6 months period.
- Subjects with uncontrolled hypertension (defined as a diastolic blood pressure ≥110 mmHg and/or a systolic blood pressure ≥180 mmHg with or without medication).
- Previously diagnosed or treated clinically significant cardiac arrhythmia
- Clinically significant chronic pulmonary or gastrointestinal disease.
- Clinical history of depression as judged by the investigator or other previous or present clinically significant psychiatric disease
- Suspected or confirmed poor compliance
- Alcohol or drug abuse during the last year.
- Subjects with any other significant condition that, in the opinion of the investigator, could interfere with participation in the study.
- Severe nocturnal hypoxia defined as more than 10 episodes with an oxygen desaturation exceeding 50% or signs of lacking resaturation between desaturations on previous recordings according to investigators judgment
- Participation in another clinical study during the last 6 months.
- Inability to understand and complete the questionnaires.
Sites / Locations
- Center for Sleep and Vigilance disorders
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm Type
Active Comparator
Active Comparator
Experimental
Arm Label
Acetazolamide and CPAP
CPAP
Acetazolamide
Arm Description
Acetazolamide: Diamox®. Hard white capsule, 250 mg. The total treatment is 4 weeks (2+2 weeks). Dosing of acetazolamide will be up-titrated during 3 days according to manufacturer instruction and titration scheme of the study. Maximum dosage (750mg) following titration will be administered as morning (250 mg) and evening(500mg) dosages.Evening medication should be taken 2 hours before bedtime. CPAP: Continuous positive nasal airway pressure (nCPAP) delivers slightly pressurized air throughout the breathing cycle and will be given through a mask that is placed and secured over the person's nose. nCPAP titration will follow clinical routines. The standard setting is a pressure delivery in the pressure range 5-15 mbar. The adequate performance of the device is controlled by user time readers and built-in memory cards and control readings are routinely performed at the end of each treatment regimen. Total duration of CPAP treatment is 4(2+2) weeks.
Continuous positive nasal airway pressure (nCPAP) delivers slightly pressurized air throughout the breathing cycle and will be given through a mask that is placed and secured over the person's nose. nCPAP titration will follow clinical routines whereby the patient is equipped with an autotitrating device (Sullivan S9). The standard setting is a pressure delivery in the pressure range 5-15 mbar and the full treatment is maintained in the patient´s home. The adequate performance of the device is controlled by user time readers and built-in memory cards and control readings are routinely performed at the end of each treatment regimen. Patients will be encouraged via telephone calls for maximum use. Total duration of CPAP treatment is 4(2+2) weeks.
Acetazolamide (Diamox®) 250 mg. Hard white capsule. The total length of acetazolamide treatment will be 4 weeks (2x2) including 3 days of titration phase of the drug. Dosing of acetazolamide will be up-titrated during 3 days according to manufacturer instruction and titration scheme of the study. Maximum dosage (750mg) following titration will be administered as morning (250 mg) and evening(500mg)dosages.Evening medication should be taken 2 hours before bedtime. The tablets will be swallowed with 300 ml of water (room temperature) in an upright body position and preferably in connection to a meal.
Outcomes
Primary Outcome Measures
The primary efficacy variable is the reduction in systolic/diastolic office blood pressure (mmHg) between the treatment regimens
The effect will be expressed in terms systolic and diastolic blood pressure (resting office, provoked office and 24 hour).
Secondary Outcome Measures
The secondary objective is to investigate the direct effect of CA inhibition on sleep disordered breathing (Apnea-hypopnea Index, AHI score (events/hour) in the subgroup of patients with OSA after treatment
Secondary objectives include Apnea-hypopnea Index, AHI score in patients with OSA after treatment.
Full Information
1. Study Identification
Unique Protocol Identification Number
NCT02220803
Brief Title
A Short Term Open, Randomized Cross-over Trial Exploring the Effect of Carbonic Anhydrase Inhibition by Acetazolamide on Sleep Apnea Associated Hypertension and Vascular Dysfunction
Official Title
A Short Term Open, Randomized Cross Over Trial Trial Exploring the Effect of Carbonic Anhydrase Inhibition by Acetazolamide on Sleep Apnea Associated Hypertension
Study Type
Interventional
2. Study Status
Record Verification Date
August 2016
Overall Recruitment Status
Completed
Study Start Date
March 2014 (undefined)
Primary Completion Date
August 2016 (Actual)
Study Completion Date
August 2016 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
Göteborg University
4. Oversight
5. Study Description
Brief Summary
This is a short term open, randomized cross over trial to explore and compare the efficacy of pharmacological carbonic anhydrase (CA) inhibition on obstructive sleep apnea (OSA) related hypertension. Patients will be randomized to receive Acetazolamide(Diamox®)(ACZ), Continuous Positive Airway Pressure (CPAP)or CPAP plus ACZ for 2 weeks. Following a 2 week wash-out period all study participants will receive the alternative treatment regimen. The total length of the study will be 10 weeks. The effects of carbonic anhydrase inhibition on blood pressure,hemodynamics and sleep apnea will be investigated.
Study hypothesis:
Carbonic anhydrase inhibition alone or in combination with nCPAP will prominently reduce blood pressure in patients with OSA. Further it is hypothesized that CA inhibition will induce a direct pharmacological effects on vascular stiffness as evidenced in overnight non-invasive assessments of vascular stiffness and that this effect will be particularly strong in patients also responding with a reduction of blood pressure.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Obstructive Sleep Apnea, Sleep-Disordered Breathing, Blood Pressure, Hypertension
Keywords
Acetazolamide, Zonegran, Obstructive Sleep apnea, Apnea, Respiration Disorders, Sleep Disorders, Cardiovascular, Hypertension, Carbonic Anhydrase, Carbonic Anhydrase Inhibitors, Enzyme Inhibitors, Sulfonamides, Therapeutic Uses, Pharmacologic Actions, Vascular stifness
7. Study Design
Primary Purpose
Treatment
Study Phase
Phase 2
Interventional Study Model
Crossover Assignment
Masking
None (Open Label)
Allocation
Randomized
Enrollment
13 (Actual)
8. Arms, Groups, and Interventions
Arm Title
Acetazolamide and CPAP
Arm Type
Active Comparator
Arm Description
Acetazolamide: Diamox®. Hard white capsule, 250 mg. The total treatment is 4 weeks (2+2 weeks). Dosing of acetazolamide will be up-titrated during 3 days according to manufacturer instruction and titration scheme of the study. Maximum dosage (750mg) following titration will be administered as morning (250 mg) and evening(500mg) dosages.Evening medication should be taken 2 hours before bedtime.
CPAP: Continuous positive nasal airway pressure (nCPAP) delivers slightly pressurized air throughout the breathing cycle and will be given through a mask that is placed and secured over the person's nose. nCPAP titration will follow clinical routines. The standard setting is a pressure delivery in the pressure range 5-15 mbar. The adequate performance of the device is controlled by user time readers and built-in memory cards and control readings are routinely performed at the end of each treatment regimen. Total duration of CPAP treatment is 4(2+2) weeks.
Arm Title
CPAP
Arm Type
Active Comparator
Arm Description
Continuous positive nasal airway pressure (nCPAP) delivers slightly pressurized air throughout the breathing cycle and will be given through a mask that is placed and secured over the person's nose. nCPAP titration will follow clinical routines whereby the patient is equipped with an autotitrating device (Sullivan S9). The standard setting is a pressure delivery in the pressure range 5-15 mbar and the full treatment is maintained in the patient´s home. The adequate performance of the device is controlled by user time readers and built-in memory cards and control readings are routinely performed at the end of each treatment regimen. Patients will be encouraged via telephone calls for maximum use. Total duration of CPAP treatment is 4(2+2) weeks.
Arm Title
Acetazolamide
Arm Type
Experimental
Arm Description
Acetazolamide (Diamox®) 250 mg. Hard white capsule. The total length of acetazolamide treatment will be 4 weeks (2x2) including 3 days of titration phase of the drug. Dosing of acetazolamide will be up-titrated during 3 days according to manufacturer instruction and titration scheme of the study. Maximum dosage (750mg) following titration will be administered as morning (250 mg) and evening(500mg)dosages.Evening medication should be taken 2 hours before bedtime. The tablets will be swallowed with 300 ml of water (room temperature) in an upright body position and preferably in connection to a meal.
Intervention Type
Drug
Intervention Name(s)
Acetazolamide
Other Intervention Name(s)
Diamox®, ATC-code: S01E C01
Intervention Description
Acetazolamide, 250mg tablets, will be administrated as multiple doses. Dosing of acetazolamide will be up-titrated during 3 days according to manufacturer instruction and titration scheme of the study. Maximum daily dosage is 750 mg (equivalent of 3 tablets/daily). Evening medication should be taken 2 hours before bedtime. The total length of Acetazolamide treatment will be 4 weeks (2x2) including 3 days of titration phase of the drug.
Intervention Type
Device
Intervention Name(s)
nasal Continuous Positive Airway Pressure (nCPAP)
Other Intervention Name(s)
nCPAP - Nasal Continuous Positive Airway Pressure., ResMed - S9 AutoSet™
Primary Outcome Measure Information:
Title
The primary efficacy variable is the reduction in systolic/diastolic office blood pressure (mmHg) between the treatment regimens
Description
The effect will be expressed in terms systolic and diastolic blood pressure (resting office, provoked office and 24 hour).
Time Frame
Baseline to 10 weeks
Secondary Outcome Measure Information:
Title
The secondary objective is to investigate the direct effect of CA inhibition on sleep disordered breathing (Apnea-hypopnea Index, AHI score (events/hour) in the subgroup of patients with OSA after treatment
Description
Secondary objectives include Apnea-hypopnea Index, AHI score in patients with OSA after treatment.
Time Frame
Baseline to 10 weeks
Other Pre-specified Outcome Measures:
Title
Other outcome measures include the assessment of vascular function.
Description
Vascular function will be assessed by:
Cold pressor test: assessing vascular response and pulse excitability. Arteriograph: Standard radial pulse assessment to determine pulse wave and augmentation.
Aritmethic stress test: Evaluate cardiovascular responses such as heart rate, blood pressure and heart rate variability induced by mental work.
CardioPAT: Finger plethysmograph measuring peripheral arterial tone as well as endothelial function following brachial artery compression (ischemia).
Full overnight two channel MC Cardio recorder (Sleep apnea indices and recording of continuous oximetry signal for vascular stiffness, microcirculation and chemosensory vascular responsiveness)
Markers of OSA include:
Time Frame
Baseline to 10 weeks
Title
Markers of OSA such as oxygen desaturation, mean overnight oxygenation, and sleep quality (by polygraphic (PG) assessment, daytime sleepiness, patient-reported outcomes as well as effects on metabolic markers.
Description
Markers of OSA include: Oxygen desaturation (ODI, events/hour), Mean overnight oxygenation (Spo2, %), Daytime sleepiness: Epworth Sleepiness Scale (ESS), Functional Outcomes of Sleep Questionnaire (FOSQ).
Patient reported outcomes include: Clinical Global rating Impression and Severity (CGI/S), Columbia suicidal severity rating scale (CSSR-S) Metabolic markers include:Total Cholesterol, HDL, LDL, Triglycerides, Insulin, HbA1C, Fasting plasma glucose and cathecholamines.
Time Frame
Baseline to 10 weeks
10. Eligibility
Sex
Male
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
75 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria:
Provision of informed consent prior to any study specific procedures
Males 18 to 75 years
An Apnea-Hypopnea Index (AHI)>15 and an Epworth Sleepiness Scale score (ESS)>6 as verified by a PSG recording.
Patients with established hypertension (systolic/diastolic blood pressure >= 160/95, either systolic or diastolic accounted for).
Clinically normal physical findings and laboratory values, as judged by the investigator
Body mass index >= 35 kg/m2
Exclusion Criteria:
Hypersensitivity to sulfonamides or acetazolamide-
Patients with ongoing medication with other sulphonamides or patients any specific antihypertensive treatment.
History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity.
Subjects with a seizure disorder
Patients with clinically verified central sleep apnea
Clinically significant renal (serum creatinine >2.0 mg/dL or >130 micromol/L), neurological, metabolic (e.g. Type 1 or 2 diabetes), haematological or hepatic disease (ASAT or ALAT >2 times the upper limit of normal).
Subjects with an occupational risk potentially exaggerated by daytime sleepiness such as handling complex machinery or professional driving
Unstable angina pectoris, unstable hypertension (or poorly controlled diabetes (HbA1C < 52 mmoles/mol, or fasting plasma glucose >7 mmoles/l).
Clinically significant congestive heart failure.
Myocardial infarction or coronary vessel intervention within the previous 6 months period.
Subjects with uncontrolled hypertension (defined as a diastolic blood pressure ≥110 mmHg and/or a systolic blood pressure ≥180 mmHg with or without medication).
Previously diagnosed or treated clinically significant cardiac arrhythmia
Clinically significant chronic pulmonary or gastrointestinal disease.
Clinical history of depression as judged by the investigator or other previous or present clinically significant psychiatric disease
Suspected or confirmed poor compliance
Alcohol or drug abuse during the last year.
Subjects with any other significant condition that, in the opinion of the investigator, could interfere with participation in the study.
Severe nocturnal hypoxia defined as more than 10 episodes with an oxygen desaturation exceeding 50% or signs of lacking resaturation between desaturations on previous recordings according to investigators judgment
Participation in another clinical study during the last 6 months.
Inability to understand and complete the questionnaires.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Jan Hedner, MD. Prof.
Organizational Affiliation
Dept of internal medicine. Center for Sleep and Vigilance disorders.
Official's Role
Principal Investigator
Facility Information:
Facility Name
Center for Sleep and Vigilance disorders
City
Gothenburg
State/Province
Vastra Gotaland
ZIP/Postal Code
40530
Country
Sweden
12. IPD Sharing Statement
Citations:
PubMed Identifier
29510792
Citation
Eskandari D, Zou D, Grote L, Hoff E, Hedner J. Acetazolamide Reduces Blood Pressure and Sleep-Disordered Breathing in Patients With Hypertension and Obstructive Sleep Apnea: A Randomized Controlled Trial. J Clin Sleep Med. 2018 Mar 15;14(3):309-317. doi: 10.5664/jcsm.6968.
Results Reference
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A Short Term Open, Randomized Cross-over Trial Exploring the Effect of Carbonic Anhydrase Inhibition by Acetazolamide on Sleep Apnea Associated Hypertension and Vascular Dysfunction
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