A Trial of Levodopa in Angelman Syndrome

Launched by WEN-HANN TAN · Jan 21, 2011

Keywords

ClinConnect Summary

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 improv...

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Eligibility criteria

• Inclusion Criteria:
• • 1. Age between 4 years and 12 years (i.e., before the 13th birthday)
• • 2. Molecular confirmation of the diagnosis of AS, which may include abnormal methylation studies or UBE3A mutation analyses - only subjects with a molecular diagnosis will be allowed to enroll
• • 3. Not on LD, CD, or any dopamine agonists in the 2 weeks prior to participation
• Exclusion Criteria:
• • 1. Co-morbid disorders that may be associated with developmental or cognitive delays
• • 2. Poorly controlled seizures - An average of more than 2 clinical seizures per month in the 12 months prior to enrollment.
• • 3. Use of medications that may interact with LD/CD including atypical antipsychotics (aripiprazole, asenapine, iloperidone, olanzapine, paliperidone, risperidone, ziprasidone), monoamine oxidase inhibitors (isocarboxazid, phenelzine, selegiline, tranylcypromine), or phenytoin within the last 14 days, or other investigational interventions within the past 3 months
• • 4. Presence of cardiovascular disease or instability, respiratory disease, liver disease, peptic ulcer disease, renal impairment, or hematological disorders
• • 5. Pregnancy