Angelman SyndromePhase 1NCT00829439
Study on Tolerability of Levodopa/Carbidopa in Children With Angelman Syndrome
A Phase 1 study testing Levodopa/Carbidopa (4:1) in people with Angelman Syndrome, run by Boston Children's Hospital at 1 site in United States.
Trial summary
This study is designed to determine the highest dose of levodopa/carbidopa that can be tolerated without any serious side effects by children with Angelman syndrome. It has been hypothesized that levodopa may lead to an improvement in the neurodevelopment and abnormal movements (e.g. Read more about this study
- Who is it for?
- Ages 4 to 12 years
- Conditions the study is for
- Angelman Syndrome
- What is being tested?
- Levodopa/Carbidopa (4:1)
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 16 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2009to Jun 2010
- Phase
- Phase 1
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 4 to 12 years
- All sexes
- No healthy volunteers
- Child
Who may be able to join
- Angelman syndrome, confirmed by molecular testing
- Must be willing to come for research visit on 2 days, exactly 1 week apart
Who cannot join
- On levodopa, carbidopa, or any dopamine agonists in the 2 weeks prior to participation
- Other medical conditions that may be associated with developmental or cognitive delays
- More than 2 clinical seizures per month
- Used monoamine oxidase (MAO) inhibitors within the last 2 weeks
- Used phenytoin within the last 2 weeks
- Used phenothiazines, butyrophenones, and thioxanthenes within last 2 weeks
Show all 14Show fewer
- Hypersensitive to levodopa or carbidopa
- Cardiovascular disease or instability
- Respiratory diseases, including asthma, emphysema, chronic cough, and shortness of breath
- Liver disease
- Stomach or intestinal ulcers
- Kidney disease
- Hematological problems, including anemia, leucopenia, and thrombocytopenia
- Used investigational drugs/interventions within the past three months
Trial locations and contacts
1 site in 1 country.
United States1 site
Children's Hospital Boston
Boston, Massachusetts, 02115
About this study
Official title: A Dose-escalation Tolerability Study of Levodopa/Carbidopa in Angelman Syndrome
This study is designed to determine the highest dose of levodopa/carbidopa that can be tolerated without any serious side effects by children with Angelman syndrome.
It has been hypothesized that levodopa may lead to an improvement in the neurodevelopment and abnormal movements (e.g. tremors) in children with Angelman syndrome.
Data from this study will be used to design a phase II trial to determine the efficacy of levodopa in treating children with Angelman syndrome.
Read the detailed description
Levodopa is a prodrug that "delivers" dopamine to the brain. It is usually given with carbidopa, a peripheral decarboxylase inhibitor, to increase the bioavailability of levodopa. Animal studies have suggested that levodopa can reverse the excess phosphorylation of some enzymes involved in synaptic and neuronal function, including calcium/calmodulin-dependent kinase type 2 (CaMKII).
Recently, it was shown that excess phosphorylation of CaMKII may be responsible for some of the neurological deficits seen in Angelman syndrome. Therefore, it is hypothesized that levodopa may lead to an improvement in the neurodevelopment and abnormal movements (e.g. tremors) in children with Angelman syndrome.
Although many children have used levodopa for a variety of medical conditions over the last 30 years, it has not been approved by the Food and Drug Administration (FDA) for use in children, and it has not been formally studied in children with Angelman syndrome, so we do not know what dose of levodopa is most appropriate for children with Angelman syndrome.
Therefore, the purpose of this study is to find out the highest dose of levodopa that children with Angelman syndrome can tolerate without any serious side effects.
Once we know the dose of levodopa that can be tolerated by children with Angelman syndrome, we will conduct a larger follow-up study to find out whether levodopa will lead to an improvement in their development and tremor.
- Conditions
- Angelman Syndrome
- Being tested
- Levodopa/Carbidopa (4:1)
- Keywords
- Angelman syndrome, Levodopa, Carbidopa, L-dopa
- Medical subject headings
- Angelman Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Levodopa/Carbidopa (4:1)Drug
Also called Sinemet, L-dopa
Dosages are based on levodopa.
Each cohort of 3 subjects will be placed on an increasing dose of levodopa (2, 5, 10, and 15 mg/kg/day) for 1 week, provided subjects in the preceding cohort tolerated the lower dose.
Levodopa/Carbidopa is a combined formulation that will be dispensed as capsules. It should be taken 3 times a day.
| Study group | Role | What they receive |
|---|---|---|
| Levodopa/Carbidopa | Experimental | Other Names:
Sinemet L-dopa
Dosages are based on levodopa.
Each cohort of 3 subjects will be placed on an increasing dose of levodopa (2, 5, 10, and 15 mg/kg/day) for 1 week, provided subjects in the preceding cohort tolerated the lower dose.
Levodopa/Carbidopa is a combined formulation that will be dispensed as capsules. It should be taken 3 times a day. Receives: Drug: Levodopa/Carbidopa (4:1) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Maximum Dose of Levodopa/Carbidopa That Can be Tolerated (Without Any Dose Limiting Toxicity) by at Least 3 Subjects.
Measured: 1 week
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Jan 2009 (estimated)
- Study startJan 2009
- Primary completionJun 2010
- Study completionJun 2010
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Angelman SyndromeStudies of the same condition, open and under way.
- More trials run by Boston Children's HospitalThe 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 1
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 16 participants (actual)
Sponsor and investigators
- Lead sponsor
- Boston Children's Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Wen-Hann Tan, Boston Children's Hospital
- Investigators
- Wen-Hann Tan, BMBS, Principal investigator, Boston Children's Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00829439
- Sponsor's protocol ID
- 08-10-0490
- Status last verified
- Sep 2016
- First submitted
- 26 Jan 2009
- Last updated
- 21 Nov 2016
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 21 Nov 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Dose-escalation Tolerability Study of Levodopa/Carbidopa in Angelman Syndrome
- ClinicalTrials.gov ID
- NCT00829439
- Acronym / sponsor ID
- 08-10-0490
- Conditions
- Angelman Syndrome
- Keywords
- Angelman syndrome, Levodopa, Carbidopa, L-dopa
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 16 participants (actual)
- Lead sponsor
- Boston Children's HospitalUniversity, hospital or other
- Study start
- Jan 2009
- Primary completion
- Jun 2010 (actual)
- Study completion
- Jun 2010 (actual)
- First posted
- 27 Jan 2009 (estimated)
- Results
- Posted 21 Nov 2016
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study is designed to determine the highest dose of levodopa/carbidopa that can be tolerated without any serious side effects by children with Angelman syndrome.
It has been hypothesized that levodopa may lead to an improvement in the neurodevelopment and abnormal movements (e.g. tremors) in children with Angelman syndrome.
Data from this study will be used to design a phase II trial to determine the efficacy of levodopa in treating children with Angelman syndrome.
Detailed description
Levodopa is a prodrug that "delivers" dopamine to the brain. It is usually given with carbidopa, a peripheral decarboxylase inhibitor, to increase the bioavailability of levodopa. Animal studies have suggested that levodopa can reverse the excess phosphorylation of some enzymes involved in synaptic and neuronal function, including calcium/calmodulin-dependent kinase type 2 (CaMKII).
Recently, it was shown that excess phosphorylation of CaMKII may be responsible for some of the neurological deficits seen in Angelman syndrome. Therefore, it is hypothesized that levodopa may lead to an improvement in the neurodevelopment and abnormal movements (e.g. tremors) in children with Angelman syndrome.
Although many children have used levodopa for a variety of medical conditions over the last 30 years, it has not been approved by the Food and Drug Administration (FDA) for use in children, and it has not been formally studied in children with Angelman syndrome, so we do not know what dose of levodopa is most appropriate for children with Angelman syndrome.
Therefore, the purpose of this study is to find out the highest dose of levodopa that children with Angelman syndrome can tolerate without any serious side effects.
Once we know the dose of levodopa that can be tolerated by children with Angelman syndrome, we will conduct a larger follow-up study to find out whether levodopa will lead to an improvement in their development and tremor.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Levodopa/Carbidopa | Experimental | Drug: Levodopa/Carbidopa (4:1)Other Names: Sinemet L-dopa Dosages are based on levodopa. Each cohort of 3 subjects will be placed on an increasing dose of levodopa (2, 5, 10, and 15 mg/kg/day) for 1 week, provided subjects in the preceding cohort tolerated the lower dose. Levodopa/Carbidopa is a combined formulation that will be dispensed as capsules. It should be taken 3 times a day. |
Who may qualify
- Ages
- 4 to 12 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
Key inclusion criteria (2 listed)
- Angelman syndrome, confirmed by molecular testing
- Must be willing to come for research visit on 2 days, exactly 1 week apart
Key exclusion criteria (14 listed)
- On levodopa, carbidopa, or any dopamine agonists in the 2 weeks prior to participation
- Other medical conditions that may be associated with developmental or cognitive delays
- More than 2 clinical seizures per month
- Used monoamine oxidase (MAO) inhibitors within the last 2 weeks
- Used phenytoin within the last 2 weeks
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 |
|---|---|---|
| Levodopa/Carbidopa (4:1)Also: Sinemet, L-dopaDosages are based on levodopa. Each cohort of 3 subjects will be placed on an increasing dose of levodopa (2, 5, 10, and 15 mg/kg/day) for 1 week, provided subjects in the preceding cohort tolerated the lower dose. Levodopa/Carbidopa is a combined formulation that will be dispensed as capsules. It should be taken 3 times a day. | Drug | Levodopa/Carbidopa |
Primary outcome
Maximum Dose of Levodopa/Carbidopa That Can be Tolerated (Without Any Dose Limiting Toxicity) by at Least 3 Subjects.
Time frame: 1 week
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Nov 2016.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: Undecided
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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.
Wen-Hann Tan, BMBS principal investigator
Boston Children's Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Levodopa/Carbidopa (4:1) in people with Angelman Syndrome, run by Boston Children's Hospital 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 2 inclusion and 14 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 21 Nov 2016. 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 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 21 Nov 2016). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Maximum Dose of Levodopa/Carbidopa That Can be Tolerated (Without Any Dose Limiting Toxicity) by at Least 3 Subjects. (time frame: 1 week). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 21 Nov 2016.