- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04084977
Dopaminergic Receptors in Sydenham's Chorea
Sydenham's Chorea: Is There a Link Between Neuropsychiatric Symptoms and Anti-dopamine Receptor Autoantibodies?
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Participants:
The investigators will enroll participants with acute Sydenham's chorea (aSC) and age-matched controls with streptococcal tonsillitis (ST) within the past 4 months and healthy children (HC) with no a history of a strep infection in the past 6 months and negative throat culture. Informed consent will be obtained from participants and/ or parents. Children with SC will be evaluated for SC severity using the USCRS. The investigators will record clinical data regarding gender, age, duration symptoms, and medical treatments. Controls will be examined by referring physician to rule out chorea. Sera samples from all participants will be stored at -70°C and shipped to the microbiology and immunology lab, University of Oklahoma Health Sciences Center (OHSC) on dry ice.
Laboratory testing:
Immunophenotyping for anti-D1R, anti-D2R, anti- LG and anti-tubulin titers and signaling studies will be performed at the OUHSC microbiology and immunology laboratory.
Autoantibody titers. Sera will be assayed for reactivity with the dopamine D1 and D2 receptors (Human dopamine D1 and D2 receptor membrane antigens, Perkin Elmer-Membrane Target Systems) in the direct ELISA and assays which include the ELISA competitive inhibition. Anti- LG and anti-tubulin titers will be tested as well.
Statistical Analysis:
Time will be categorized in order to model non-linear associations among the groups. Means will be compared among groups using an ANOVA model that included main effects for the time, participant diagnosis and the interaction between participant diagnosis and time. Modeling assumptions will be evaluated using residual plots. A natural log transformation of the antibody measure will be used when there was evidence of non-constant variance across the groups. If a significant interaction between time and participant group will be found, time trends will be summarized separately within each participant group. Post-hoc pair-wise comparisons will be made using Tukey's method to control the type I error rate. A two-sided 0.05 alpha level will be used to define statistical significance. Analyses will be performed using SAS (SAS Institute Inc., SAS v9.4, Cary, NC: SAS Institute Inc.).
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
-
-
-
Jerusalem, Israel, 91031
- Shaare Zedek Medical Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- sydenham chora OR strep tonsilitiscontrol without strep tonsilitis OR
Exclusion Criteria:
- neurological disrder autoimmune disorder
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Retrospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Sydenam Chorea (SC)
individuals with SC
|
detecting anti bodies against D1, D2 receptor, tubolin Lysoganglioside
|
tonsilitis
children with tonsilitis in the past 3 months
|
detecting anti bodies against D1, D2 receptor, tubolin Lysoganglioside
|
control
children wit no tonsilitis
|
detecting anti bodies against D1, D2 receptor, tubolin Lysoganglioside
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Antibody titers
Time Frame: Once at time of initial visit within the first 4 months from onset
|
titer levels of anti dopamine receptors (anti-D1 and anti-D2) using ELISA (titer levels are expresed as dilutions i.e. 1:400)
|
Once at time of initial visit within the first 4 months from onset
|
UFMG Sydenham's Chorea Rating Scale
Time Frame: Upon presentation when symptomatic, usually within 4 months of onset
|
the mean value of the 21 item of clinical chorea rating.
Ranging from 0 (=none) to 4 (=severe) for each item
|
Upon presentation when symptomatic, usually within 4 months of onset
|
Collaborators and Investigators
Sponsor
Collaborators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 139/14
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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