A Trial of Levodopa in Angelman Syndrome
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|ClinicalTrials.gov Identifier: NCT01281475|
Recruitment Status : Completed
First Posted : January 24, 2011
Results First Posted : January 13, 2017
Last Update Posted : July 15, 2020
This study is designed to determine whether levodopa will lead to an improvement in the development and tremor in children with Angelman syndrome (AS).
It has been suggested that levodopa, a medication that is usually used to treat Parkinson disease in adults, may help children with AS in their overall development and reduce the tremor that some of them have.
If levodopa is found to be beneficial for children with AS, this could lead to a new treatment for AS.
Funding Source - FDA-OOPD
|Condition or disease||Intervention/treatment||Phase|
|Angelman Syndrome||Drug: Levodopa Drug: Placebo Oral Capsule||Phase 2 Phase 3|
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.
Therefore, the purpose of this study is to find out whether levodopa will lead to an improvement in the development and in the tremor in children with AS.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||67 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||A Phase 2 Randomized Placebo-Controlled Trial of Levodopa in Angelman Syndrome|
|Study Start Date :||January 2011|
|Actual Primary Completion Date :||July 2015|
|Actual Study Completion Date :||July 2015|
Levodopa is prescribed as a combination of levodopa/carbidopa (4:1) to reduce the peripheral side effects. The dosage used was 15 mg/kg/day in 3 divided doses.
Dosages are based on levodopa.
Subjects randomized to the levodopa arm will receive a levodopa dose of 5 mg/kg/day in the first 2 weeks of the study, a levodopa dose of 10 mg/kg/day in the second 2 weeks of the study, and a levodopa dose of 15 mg/kg/day (up to a maximum of 800 mg per day) for the remaining duration of the study.
Levodopa/Carbidopa is a combined formulation that will be dispensed as capsules. It should be taken 3 times a day.
Placebo Comparator: Placebo
The placebo contains excipients similar to those in the active drug, but it does not contain levodopa or carbidopa, so it is not expected to have any effect.
Drug: Placebo Oral Capsule
The placebo contains excipients similar to those in the active drug, but it does not contain levodopa or carbidopa.
- Bayley Cognitive Age Equivalent at 1 Year [ Time Frame: 12 months ]
- Presence of Tremors [ Time Frame: 1 year ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01281475
|United States, California|
|Rady Children's Hospital, San Diego|
|San Diego, California, United States, 92123|
|University of California, San Francisco|
|San Francisco, California, United States, 94121|
|United States, Massachusetts|
|Children's Hospital Boston|
|Boston, Massachusetts, United States, 02115|
|United States, Ohio|
|Cincinnati Children's Hospital|
|Cincinnati, Ohio, United States, 45229|
|United States, South Carolina|
|Greenwood Genetic Center|
|Greenwood, South Carolina, United States, 29646|
|United States, Tennessee|
|Vanderbilt University Medical Center|
|Nashville, Tennessee, United States, 37212|
|United States, Texas|
|Baylor College of Medicine|
|Houston, Texas, United States, 77030|
|Principal Investigator:||Wen-Hann Tan, BMBS||Boston Children's Hospital|
|Principal Investigator:||Lynne M. Bird, MD||Rady Children's Hospital, San Diego|
|Principal Investigator:||Steven A. Skinner, MD||Greenwood Genetic Center|
|Principal Investigator:||Carlos A. Bacino, MD||Baylor College of Medicine|
|Principal Investigator:||Anne Slavotinek, MD||University of California, San Francisco|
|Principal Investigator:||Cary Fu, MD||Vanderbilt University Medical Center|
|Principal Investigator:||Logan Wink, M.D||Children's Hospital Medical Center, Cincinnati|