Role of Dopamine Receptors in Primary Focal Dystonias

Completed

Conditions studied: Healthy, Focal Dystonias

In brief

Dystonia is a disabling movement disorder characterized by repetitive patterned or sustained muscle contractions causing twisting or abnormal postures that may afflict 250,000 people in the U.S. While the pathophysiology of dystonia remains uncertain the treatment is rather rudimentary. A better understanding of neural mechanisms of dystonias is not only an invaluable prerequisite for developing better treatment options but also a step toward better understanding of the complex network of basal ganglia. In this study I will investigate if there is any difference between the dopamine receptors and dopamine in people with dystonia and healthy subjects.

Key facts

Study ID

NCT01373840

Run by

Washington University School of Medicine

People needed

40

Starts

2011-09-01

Expected to finish

2016-04-01

Last updated by the study team

2018-05-15

Who can join

Age: 21 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Age >20
• Male or Female
• Any race or ethnicity
• Primary focal dystonia (arm or cranial)
• Ability to give informed consent

You may not qualify if…

• Family history of dystonia
• Pregnancy (confirmed with negative urine pregnancy test in women of child bearing potential), breastfeeding
• Exposure to radiation therapy
• Any MRI contraindications such as foreign metallic implants, pacemaker, and aneurysm clip etc.
• History of cardiac disease, uncontrolled hypertension, abnormal EKG during screening phase
• History of exposure to any drugs affecting dopaminergic systems within the last 6 months (e.g. dopamine receptor blocking agents, cocaine, amphetamine, tetrabenazine, reserpine, L-dopa, dopamine agonists, as they might affect the dopamine receptor binding or endogenous dopamine).
• Active depression (Beck Depression Inventory_II >14)
• Cognitive impairment (Mini-Mental State Score <27)
• CNS active medications such as gabapentin or narcotics, muscle relaxants which might be given for pain in the 3 days prior to study
• History of stroke, seizure, cerebral palsy, generalized dystonia, parkinsonism, inability to hold head still during the scanning time.

Where it is running

• Washington University — St Louis, Missouri, United States

Full record on ClinicalTrials.gov

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