Friedreich AtaxiaPhase 2NCT00229632
Idebenone to Treat Friedreich's Ataxia
A Phase 2 study testing Idebenone in people with Friedreich Ataxia, run by National Institute of Neurological Disorders and Stroke (NINDS) at 1 site in United States.
Trial summary
This study will determine whether a drug called idebenone is safe and effective in reducing the level of oxidants that are believed to damage the nervous system and hearts in patients with Friedreich's ataxia. Read more about this study
- Who is it for?
- Ages 9 to 17 years
- Conditions the study is for
- Friedreich Ataxia
- What is being tested?
- Idebenone
- How many people
- 51 participants
- Where
- 1 siteUnited States
- Study dates
- 27 Sep 2005to 17 Dec 2007
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 9 to 17 years
- All sexes
- No healthy volunteers
- Child
Who may be able to join
- Diagnosis of FA with confirmed FRDA mutations.
- Age from nine up to but not over eighteen years.
- Weight between 30 to 80 kilograms.
- Ambulatory (assistance devices permitted).
- Willing to participate in all aspects of trial design and follow-up.
- All subjects agree and commit to the use of 2 reliable methods of birth control for the duration of the study if sexually active.
- Neurologically symptomatic.
- No exposure to idebenone, coenzyme Q10, or other dietary supplements for a period of at least one month before enrollment in the study.
Who cannot join
- History of a hypersensitivity reaction to idebenone or coenzyme Q10.
- Pregnant or lactating women. All women of child-bearing potential must have negative serum pregnancy prior to the medication phase of the study. If a minor has a positive pregnancy test, we will inform her but not inform her parents unless we are asked to by the minor.
- Platelet count, white blood cell count or hemoglobin below the lower limit of normal.
- Alkaline phosphatase, SGOT, or SGPT greater than 1.5 times the upper limit of normal. Bilirubin greater than 1.5 g/dl.
- Creatinine greater than 1.5 times the upper limit of normal based upon the pediatric reference range provided by the testing laboratory.
- Clinically significant medical disease that, in the judgment of the investigators, would expose the patient to undue risk of harm or prevent the patient from completing the study.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, 20892
About this study
Official title: A Six Month Double-Blind, Placebo-Controlled Phase 2 Clinical Trial to Determine the Safety and Efficacy of Idebenone Administered to Patients With Friedreich's Ataxia
This study will determine whether a drug called idebenone is safe and effective in reducing the level of oxidants that are believed to damage the nervous system and hearts in patients with Friedreich's ataxia. Friedreich's ataxia is caused by an abnormality in the gene that makes a protein called frataxin, which is necessary for the proper functioning of energy-producing parts of cells called mitrochondria. In Friedreich's ataxia, the mitochondria become overloaded with iron, and high levels of harmful compounds called oxidants are formed. These oxidants are believed to damage the cells of the nervous system and hearts of people with Friedreich's ataxia. Idebenone is a man-made drug similar to a naturally occurring compound known as Coenzyme Q10. This study will test whether idebenone can alleviate some of the symptoms of Friedreich's ataxia and slow or halt the progression of the disease.
Patients with genetically confirmed Friedreich's ataxia who are between 9 and 18 years of age, weigh between 65 and 175 pounds and can walk 25 feet with or without an assistive device may be eligible for this study. Candidates are screened with blood tests and a review of their medical records.
Read more
Participants undergo the following tests and procedures:
- Medical interview and physical examination. Tests include blood and urine tests, an electrocardiogram, or EKG (recording of the electrical activity of the heart), echocardiogram (ultrasound test showing the pumping action of the heart, thickness of the heart walls, and any valve leakage), and a detailed neurological examination, including maneuvers such as copying a drawing and putting pegs in a board. Patients' parents are asked questions about how they feel their child's disease affects the child's quality of life.
- Magnetic resonance imaging (MRI) to examine the heart muscle and blood flow to the heart. MRI uses a magnetic field and radio waves to produce images of body tissues and organs. The patient lies on a table that is moved into the doughnut-shaped MRI scanner, wearing earplugs to muffle loud knocking and thumping sounds that occur during the scanning process. A catheter (plastic tube) is placed in a vein in the child's arm so that a chemical called gadolinium can be injected during the MRI study. Gadolinium brightens areas of the heart, improving the ability to see the heart and blood flow.
- Physical medicine and rehabilitation evaluations to test the child's physical functioning. These tests include gait evaluation, measurements of the ability to exert and maintain a constant force, assessment of visual-motor control and fine motor control, aerobic exercise endurance testing, and measurement of the ability of the child's heart and lungs to increase their effectiveness with exercise.
- Idebenone/placebo treatment. Patients are given a 6-month supply of either idebenone pills or placebo (pills that look like the study drug but have no active ingredient) to take three times a day. Patients are seen by their primary care physician after 1 and 3 months on the study medication for a brief physical examination. In addition, they have blood and urine tests once a month while on medication to check for any abnormalities.
- 6-month examination. After 6 months on the study drug, patients return to NIH to repeat all the tests listed above to determine the effects of idebenone treatment.
Read the detailed description
Background: Friedreich's ataxia (FA) is a progressive, autosomal recessive, multisystem degenerative disease for which there is currently no effective treatment. Recent studies have suggested that lipid-soluble antioxidants lead to a modest reversal of cardiomyopathy in patients with FA. It is possible that antioxidants may also prevent the progression of neurodegeneration.
Objective: This will be a 6 month phase 2 double-blind, placebo-controlled trial to assess the safety and efficacy of idebenone administered to adolescents and children with FA.
Study Population: We aim to enroll 48 subjects composed of children (ages 9-11) and adolescents (ages 12-17) with FA divided evenly among 4 treatment arms (placebo, low, intermediate, and high dose idebenone).
Design: Our primary objective is to examine the change in the level of oxidative stress by measuring the oxidative marker 8-hydroxy-2-deoxyguanosine from baseline and after 6 months of treatment with placebo or varying doses of idebenone. Following informed consent and assent, patients will undergo an initial medical history and physical followed by specific neurological, functional, and cardiac testing over a two-day outpatient visit. Patients will provide blood and urine samples for safety laboratory and biochemical analysis. Each patient will be randomized to one of 4 treatment arms and will be provided with a 6 month supply of study drug or placebo which will be administered three times a day. Patients will have follow-up laboratory monitoring after 1 and 3 months and at the end of the study. Additionally, patients will also have an EKG, vital signs, including orthostatics, and a physical examination performed after 1 and 3 months by their primary care physician. Patients will return after 6 months for follow-up exam, testing, and laboratory monitoring over a two-day outpatient visit.
Outcome Parameters: The primary endpoint in this phase 2 trial is the change in the level of the oxidative stress marker 8-hydroxy-2-deoxyguanosine. Secondary endpoints include types and frequency of adverse events, if any, compliance with the dosing regimen, and measurements of the following: International Cooperative Ataxia Rating Scale (ICARS), Friedreich's ataxia Rating Scale (FARS), force control, gait analysis, quantitative sensation testing, fine motor control, health related quality of life score (SF-10), functional capacity, aerobic capacity, left ventricular wall mass, noninvasive measures of systolic and diastolic ventricular function, metabolic markers, markers of mitochondrial DNA damage, and gene expression profiling.
Future Directions: We hope that the results of this phase 2 study will assist us in developing a multi-center, double-blinded, placebo-controlled phase III trial.
- Conditions
- Friedreich Ataxia
- Being tested
- Idebenone
- Keywords
- Friedreich's Ataxia, Idebenone, Ataxia, Drug Trial, Randomized Trial, Friedreich Ataxia, FA
- Medical subject headings
- Friedreich Ataxia, Ataxia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
IdebenoneDrug
Idebenone is a short-chain benzoquinone derivative of similar structure to ubiquinone (coenzyme Q10). This compound was synthesized and developed initially by Takeda Chemical Industries, Ltd. (Osaka, Japan) and designated as CV-2619. The chemical name for idebenone is 6-(10-Hydroxydecyl)-2,3-dimethoxy-5-methyl-1,4-benxoquinone. Santhera Pharmaceuticals (Liestal, Switzerland) LLC, will supply drug for this study as specified by a clinical trial agreement.
What is being measured
The primary outcome is the main question the study is designed to answer.
To examine the change in the level of oxidative stress by measuring the oxidative marker 8-hydroxy-2-deoxyguanosine from baseline and after 6 months of treatment with placebo or varying doses of idebenone
Measured: baseline and after 6 months
Secondary outcomes (6)
To evaluate the safety and tolerability of idebenone
Measured: baseline and after 6 months
To explore the effects of idebenone on cardiac parameters
Measured: baseline and after 6 months
To explore the effects of idebenone on neurological function
Measured: baseline and after 6 months
To assess the effects of idebenone on patients quality of life
Measured: baseline and after 6 months
To explore the effects of idebenone on functional capacity
Measured: baseline and after 6 months
To evaluate metabolic alterations, gene expression changes and markers of mitochondrial DNA damage
Measured: baseline and after 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Sep 2005 (estimated)
- Study start27 Sep 2005
- Primary completion17 Dec 2007
- Study completion17 Dec 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Friedreich AtaxiaStudies of the same condition, open and under way.
- More trials run by National Institute of Neurological Disorders and Stroke (NINDS)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- Triple blind
- Who is masked
- Participant, Care provider, Investigator
- Enrolment
- 51 participants (actual)
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
- Responsible party
- Sponsor
- Investigators
- Kenneth H Fischbeck, M.D., Principal investigator, National Institute of Neurological Disorders and Stroke (NINDS)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00229632
- Sponsor's protocol ID
- 050245
- Other IDs
- 05-N-0245
- Status last verified
- 14 Mar 2019
- First submitted
- 29 Sep 2005
- Last updated
- 18 Mar 2019
- Results posted
- No
- FDA-regulated drug
- Yes
Publications
Harding AE. Friedreich's ataxia: a clinical and genetic study of 90 families with an analysis of early diagnostic criteria and intrafamilial clustering of clinical features. Brain. 1981 Sep;104(3):589-620. doi: 10.1093/brain/104.3.589.
PubMed 7272714Durr A, Cossee M, Agid Y, Campuzano V, Mignard C, Penet C, Mandel JL, Brice A, Koenig M. Clinical and genetic abnormalities in patients with Friedreich's ataxia. N Engl J Med. 1996 Oct 17;335(16):1169-75. doi: 10.1056/NEJM199610173351601.
PubMed 8815938Hewer RL. Study of fatal cases of Friedreich's ataxia. Br Med J. 1968 Sep 14;3(5619):649-52. doi: 10.1136/bmj.3.5619.649.
PubMed 5673214Drinkard BE, Keyser RE, Paul SM, Arena R, Plehn JF, Yanovski JA, Di Prospero NA. Exercise capacity and idebenone intervention in children and adolescents with Friedreich ataxia. Arch Phys Med Rehabil. 2010 Jul;91(7):1044-50. doi: 10.1016/j.apmr.2010.04.007.
PubMed 20599042Haugen AC, Di Prospero NA, Parker JS, Fannin RD, Chou J, Meyer JN, Halweg C, Collins JB, Durr A, Fischbeck K, Van Houten B. Altered gene expression and DNA damage in peripheral blood cells from Friedreich's ataxia patients: cellular model of pathology. PLoS Genet. 2010 Jan 15;6(1):e1000812. doi: 10.1371/journal.pgen.1000812.
PubMed 20090835Di Prospero NA, Baker A, Jeffries N, Fischbeck KH. Neurological effects of high-dose idebenone in patients with Friedreich's ataxia: a randomised, placebo-controlled trial. Lancet Neurol. 2007 Oct;6(10):878-86. doi: 10.1016/S1474-4422(07)70220-X.
PubMed 17826341
Study at a glance
From the registry record, last updated by the sponsor on 18 Mar 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Six Month Double-Blind, Placebo-Controlled Phase 2 Clinical Trial to Determine the Safety and Efficacy of Idebenone Administered to Patients With Friedreich's Ataxia
- ClinicalTrials.gov ID
- NCT00229632
- Acronym / sponsor ID
- 050245
- Conditions
- Friedreich Ataxia
- Keywords
- Friedreich's Ataxia, Idebenone, Ataxia, Drug Trial, Randomized Trial, Friedreich Ataxia, FA
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 51 participants (actual)
- Lead sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)US National Institutes of Health
- Study start
- 27 Sep 2005
- Primary completion
- 17 Dec 2007 (actual)
- Study completion
- 17 Dec 2007 (actual)
- First posted
- 29 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will determine whether a drug called idebenone is safe and effective in reducing the level of oxidants that are believed to damage the nervous system and hearts in patients with Friedreich's ataxia. Friedreich's ataxia is caused by an abnormality in the gene that makes a protein called frataxin, which is necessary for the proper functioning of energy-producing parts of cells called mitrochondria. In Friedreich's ataxia, the mitochondria become overloaded with iron, and high levels of harmful compounds called oxidants are formed. These oxidants are believed to damage the cells of the nervous system and hearts of people with Friedreich's ataxia. Idebenone is a man-made drug similar to a naturally occurring compound known as Coenzyme Q10. This study will test whether idebenone can alleviate some of the symptoms of Friedreich's ataxia and slow or halt the progression of the disease.
Patients with genetically confirmed Friedreich's ataxia who are between 9 and 18 years of age, weigh between 65 and 175 pounds and can walk 25 feet with or without an assistive device may be eligible for this study. Candidates are screened with blood tests and a review of their medical records.
Participants undergo the following tests and procedures:
- Medical interview and physical examination. Tests include blood and urine tests, an electrocardiogram, or EKG (recording of the electrical activity of the heart), echocardiogram (ultrasound test showing the pumping action of the heart, thickness of the heart walls, and any valve leakage), and a detailed neurological examination, including maneuvers such as copying a drawing and putting pegs in a board. Patients' parents are asked questions about how they feel their child's disease affects the child's quality of life.
- Magnetic resonance imaging (MRI) to examine the heart muscle and blood flow to the heart. MRI uses a magnetic field and radio waves to produce images of body tissues and organs. The patient lies on a table that is moved into the doughnut-shaped MRI scanner, wearing earplugs to muffle loud knocking and thumping sounds that occur during the scanning process. A catheter (plastic tube) is placed in a vein in the child's arm so that a chemical called gadolinium can be injected during the MRI study. Gadolinium brightens areas of the heart, improving the ability to see the heart and blood flow.
- Physical medicine and rehabilitation evaluations to test the child's physical functioning. These tests include gait evaluation, measurements of the ability to exert and maintain a constant force, assessment of visual-motor control and fine motor control, aerobic exercise endurance testing, and measurement of the ability of the child's heart and lungs to increase their effectiveness with exercise.
- Idebenone/placebo treatment. Patients are given a 6-month supply of either idebenone pills or placebo (pills that look like the study drug but have no active ingredient) to take three times a day. Patients are seen by their primary care physician after 1 and 3 months on the study medication for a brief physical examination. In addition, they have blood and urine tests once a month while on medication to check for any abnormalities.
- 6-month examination. After 6 months on the study drug, patients return to NIH to repeat all the tests listed above to determine the effects of idebenone treatment.
Detailed description
Background: Friedreich's ataxia (FA) is a progressive, autosomal recessive, multisystem degenerative disease for which there is currently no effective treatment. Recent studies have suggested that lipid-soluble antioxidants lead to a modest reversal of cardiomyopathy in patients with FA. It is possible that antioxidants may also prevent the progression of neurodegeneration.
Objective: This will be a 6 month phase 2 double-blind, placebo-controlled trial to assess the safety and efficacy of idebenone administered to adolescents and children with FA.
Study Population: We aim to enroll 48 subjects composed of children (ages 9-11) and adolescents (ages 12-17) with FA divided evenly among 4 treatment arms (placebo, low, intermediate, and high dose idebenone).
Design: Our primary objective is to examine the change in the level of oxidative stress by measuring the oxidative marker 8-hydroxy-2-deoxyguanosine from baseline and after 6 months of treatment with placebo or varying doses of idebenone. Following informed consent and assent, patients will undergo an initial medical history and physical followed by specific neurological, functional, and cardiac testing over a two-day outpatient visit. Patients will provide blood and urine samples for safety laboratory and biochemical analysis. Each patient will be randomized to one of 4 treatment arms and will be provided with a 6 month supply of study drug or placebo which will be administered three times a day. Patients will have follow-up laboratory monitoring after 1 and 3 months and at the end of the study. Additionally, patients will also have an EKG, vital signs, including orthostatics, and a physical examination performed after 1 and 3 months by their primary care physician. Patients will return after 6 months for follow-up exam, testing, and laboratory monitoring over a two-day outpatient visit.
Outcome Parameters: The primary endpoint in this phase 2 trial is the change in the level of the oxidative stress marker 8-hydroxy-2-deoxyguanosine. Secondary endpoints include types and frequency of adverse events, if any, compliance with the dosing regimen, and measurements of the following: International Cooperative Ataxia Rating Scale (ICARS), Friedreich's ataxia Rating Scale (FARS), force control, gait analysis, quantitative sensation testing, fine motor control, health related quality of life score (SF-10), functional capacity, aerobic capacity, left ventricular wall mass, noninvasive measures of systolic and diastolic ventricular function, metabolic markers, markers of mitochondrial DNA damage, and gene expression profiling.
Future Directions: We hope that the results of this phase 2 study will assist us in developing a multi-center, double-blinded, placebo-controlled phase III trial.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- Triple blind (participant, care provider, investigator)
Who may qualify
- Ages
- 9 to 17 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
Key inclusion criteria (8 listed)
- Diagnosis of FA with confirmed FRDA mutations.
- Age from nine up to but not over eighteen years.
- Weight between 30 to 80 kilograms.
- Ambulatory (assistance devices permitted).
- Willing to participate in all aspects of trial design and follow-up.
Key exclusion criteria (6 listed)
- History of a hypersensitivity reaction to idebenone or coenzyme Q10.
- Pregnant or lactating women. All women of child-bearing potential must have negative serum pregnancy prior to the medication phase of the study. If a minor has a positive pregnancy test, we will inform her but not inform her parents unless we are asked to by the minor.
- Platelet count, white blood cell count or hemoglobin below the lower limit of normal.
- Alkaline phosphatase, SGOT, or SGPT greater than 1.5 times the upper limit of normal. Bilirubin greater than 1.5 g/dl.
- Creatinine greater than 1.5 times the upper limit of normal based upon the pediatric reference range provided by the testing laboratory.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| IdebenoneIdebenone is a short-chain benzoquinone derivative of similar structure to ubiquinone (coenzyme Q10). This compound was synthesized and developed initially by Takeda Chemical Industries, Ltd. (Osaka, Japan) and designated as CV-2619. The chemical name for idebenone is 6-(10-Hydroxydecyl)-2,3-dimethoxy-5-methyl-1,4-benxoquinone. Santhera Pharmaceuticals (Liestal, Switzerland) LLC, will supply drug for this study as specified by a clinical trial agreement. | Drug | – |
Primary outcome
To examine the change in the level of oxidative stress by measuring the oxidative marker 8-hydroxy-2-deoxyguanosine from baseline and after 6 months of treatment with placebo or varying doses of idebenone
Time frame: baseline and after 6 months
6 secondary outcomes
To evaluate the safety and tolerability of idebenone
Time frame: baseline and after 6 months
To explore the effects of idebenone on cardiac parameters
Time frame: baseline and after 6 months
To explore the effects of idebenone on neurological function
Time frame: baseline and after 6 months
To assess the effects of idebenone on patients quality of life
Time frame: baseline and after 6 months
To explore the effects of idebenone on functional capacity
Time frame: baseline and after 6 months
To evaluate metabolic alterations, gene expression changes and markers of mitochondrial DNA damage
Time frame: baseline and after 6 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Mar 2019.
- Background: PubMed 7272714Harding AE. Friedreich's ataxia: a clinical and genetic study of 90 families with an analysis of early diagnostic criteria and intrafamilial clustering of clinical features. Brain. 1981 Sep;104(3):589-620. doi: 10.1093/brain/104.3.589.
- Background: PubMed 8815938Durr A, Cossee M, Agid Y, Campuzano V, Mignard C, Penet C, Mandel JL, Brice A, Koenig M. Clinical and genetic abnormalities in patients with Friedreich's ataxia. N Engl J Med. 1996 Oct 17;335(16):1169-75. doi: 10.1056/NEJM199610173351601.
- Background: PubMed 5673214Hewer RL. Study of fatal cases of Friedreich's ataxia. Br Med J. 1968 Sep 14;3(5619):649-52. doi: 10.1136/bmj.3.5619.649.
- Derived from this study: PubMed 20599042Drinkard BE, Keyser RE, Paul SM, Arena R, Plehn JF, Yanovski JA, Di Prospero NA. Exercise capacity and idebenone intervention in children and adolescents with Friedreich ataxia. Arch Phys Med Rehabil. 2010 Jul;91(7):1044-50. doi: 10.1016/j.apmr.2010.04.007.
- Derived from this study: PubMed 20090835Haugen AC, Di Prospero NA, Parker JS, Fannin RD, Chou J, Meyer JN, Halweg C, Collins JB, Durr A, Fischbeck K, Van Houten B. Altered gene expression and DNA damage in peripheral blood cells from Friedreich's ataxia patients: cellular model of pathology. PLoS Genet. 2010 Jan 15;6(1):e1000812. doi: 10.1371/journal.pgen.1000812.
- Derived from this study: PubMed 17826341Di Prospero NA, Baker A, Jeffries N, Fischbeck KH. Neurological effects of high-dose idebenone in patients with Friedreich's ataxia: a randomised, placebo-controlled trial. Lancet Neurol. 2007 Oct;6(10):878-86. doi: 10.1016/S1474-4422(07)70220-X.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Kenneth H Fischbeck, M.D. principal investigator
National Institute of Neurological Disorders and Stroke (NINDS)
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Idebenone in people with Friedreich Ataxia, run by National Institute of Neurological Disorders and Stroke (NINDS) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 18 Mar 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
To examine the change in the level of oxidative stress by measuring the oxidative marker 8-hydroxy-2-deoxyguanosine from baseline and after 6 months of treatment with placebo or varying doses of idebenone (time frame: baseline and after 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00229632, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Mar 2019; AzTrials last refreshed its copy on 7 Nov 2026.