Characteristics of Episodic Ataxia Syndrome

Cerebellar Diseases Clinical Trial

Official title:

Episodic Ataxia Syndrome: Genotype-phenotype Correlation and Longitudinal Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00266760
• Other study ID #: RDCRN 5302
• Secondary ID: U54RR019482-03
• Status: Completed
• Start date: May 2006
• Est. completion date: July 2011

Study information

• Verified date: May 2023
• Source: University of California, Los Angeles
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Episodic ataxia (EA) is a rare genetic disease characterized by episodes of imbalance, incoordination, and slurring of speech. The underlying cause of EA is only partly understood, and currently there are no established treatments. There is also little information about the link between EA's clinical features and its genetic basis. The purpose of this study is to better characterize EA and disease progression. In turn, this may direct the development of future treatments.

Description:

Attacks of ataxia, or the loss of ability to coordinate muscular movement, are often triggered by stress or exertion. EA is likely caused by an inherited genetic mutation; many individuals with EA have abnormalities in the KCNA1 or CACNA1A genes. To date, two known subtypes of EA have been identified, and other types likely exist. Specific characteristics of each EA subtype, however, have not been adequately described. The purpose of this study is to better define the clinical features and genetic basis of the various subtypes of EA and to evaluate disease progression. The study will also establish relevant study endpoints for use in future therapeutic trials. This multi-center observational study will involve both a cross-sectional data analysis and a prospective longitudinal analysis. Participants will initially attend an outpatient study visit that will last 7 hours. This initial evaluation will include a medical history, a physical examination, neurological testing, and an ataxia assessment. Blood will be collected for genetic testing. Additionally, the following procedures may be conducted: ocular motor test, electromyography/nerve conduction study, electroencephalogram, MRI, and digital videotaping. Follow-up evaluations will occur on a yearly basis for at least 2 years; each will last 4 hours.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 39
• Est. completion date: July 2011
• Est. primary completion date: July 2011
• Accepts healthy volunteers: No
• Gender: All
• Age group: 5 Years and older

Eligibility

Inclusion Criteria:

• A clinically confirmed diagnosis of episodic ataxia as defined by one of the following

three features:

1. Clear-cut episodes of recurrent, transient ataxia

2. Mutation confirmed in KCNA1 or CACNA1A

3. Ataxic features with a first degree relative with episodic ataxia

Exclusion Criteria:

• Any other disorder known to cause episodic ataxia

Related Conditions & MeSH terms

• Ataxia
• Cerebellar Ataxia
• Cerebellar Diseases
• Episodic Ataxia Syndrome
• Syndrome

Locations

Country	Name	City	State
Canada	London Health Sciences Centre	London	Ontario
United Kingdom	Institute of Neurology, Center for Neuromuscular Disease	Queen Square	London
United States	Brigham & Women's Hospital	Boston	Massachusetts
United States	University of Kansas Medical Center	Kansas City	Kansas
United States	Reed Neurological Research Center, UCLA	Los Angeles	California
United States	University of Rochester School of Medicine	Rochester	New York

Sponsors (3)

Lead Sponsor	Collaborator
University of California, Los Angeles	Office of Rare Diseases (ORD), Rare Diseases Clinical Research Network

Countries where clinical trial is conducted

United States,  Canada,  United Kingdom, 

References & Publications (4)

Denier C, Ducros A, Vahedi K, Joutel A, Thierry P, Ritz A, Castelnovo G, Deonna T, Gerard P, Devoize JL, Gayou A, Perrouty B, Soisson T, Autret A, Warter JM, Vighetto A, Van Bogaert P, Alamowitch S, Roullet E, Tournier-Lasserve E. High prevalence of CACNA1A truncations and broader clinical spectrum in episodic ataxia type 2. Neurology. 1999 Jun 10;52(9):1816-21. doi: 10.1212/wnl.52.9.1816. — View Citation

Graves TD, Cha YH, Hahn AF, Barohn R, Salajegheh MK, Griggs RC, Bundy BN, Jen JC, Baloh RW, Hanna MG; CINCH Investigators. Episodic ataxia type 1: clinical characterization, quality of life and genotype-phenotype correlation. Brain. 2014 Apr;137(Pt 4):100 — View Citation

Jen J, Kim GW, Baloh RW. Clinical spectrum of episodic ataxia type 2. Neurology. 2004 Jan 13;62(1):17-22. doi: 10.1212/01.wnl.0000101675.61074.50. — View Citation

Sasaki O, Jen JC, Baloh RW, Kim GW, Isawa M, Usami S. Neurotological findings in a family with episodic ataxia. J Neurol. 2003 Mar;250(3):373-5. doi: 10.1007/s00415-003-0994-3. No abstract available. — View Citation