Natural History Study of and Genetic Modifiers in Spinocerebellar Ataxias
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The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT01060371 |
Recruitment Status :
Recruiting
First Posted : February 2, 2010
Last Update Posted : May 5, 2022
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Spinocerebellar ataxias (SCA) are genetic neurological diseases that cause imbalance, poor coordination, and speech difficulties. There are different kinds of SCA and this study will focus on types 1, 2,3, and 6 (SCA 1, SCA 2, SCA 3 , also known as Machado-Joseph disease and SCA 6). The diseases are rare, slowly progressive, cause increasingly severe neurological difficulties and are variable across and within genotypes. The purpose of this research study is to bring together a group of experts in the field of SCA for the purpose of learning more about the disease.
The research questions are:
- How does your disease progress over time?
- What are the best ways to measure the progression?
- Do some genes, other than the gene that is abnormal in your disease, have any effect on the way the disease behaves?
This is a nationwide study and we expect that 800 patients will participate all over the USA. The participants will be in the study for an indeterminate period of time. Study visits will be done every 6 or 12 months depending on the participating site.
Condition or disease | Intervention/treatment |
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Spinocerebellar Ataxia Type 1 Spinocerebellar Ataxia Type 2 Spinocerebellar Ataxia Type 3 Spinocerebellar Ataxia Type 6 | Genetic: All Participants |
If you decide to participate in this study, we will collect 1 tablespoon (15 milliliters) of blood during the first/screening visit in order to extract your DNA. The sample will be sent to the research laboratory of Dr Stefan Pulst at the University of Utah for the study of genetic factors that modify the course of your disease.
As part of this study, we would like to put some of your blood in a tissue repository. Submission of your sample to the repository may give scientists valuable research material that can help them to develop new diagnostic tests, new treatments, and new ways to prevent diseases. Scientists will not use your sample, or material isolated from it, for commercial products or services. Your blood will be kept by Dr. Stefan Pulst.
Your sample will not have your name or other personal information linked to it. Your sample may be shared with researchers at the University of Utah and at other institutions. The only information we will keep with the sample is your age, what disease you have, the age at onset of your disease and the duration of the disease. The principal investigator at your site will be the only person who can link the sample to you. You can have your sample removed from the bank later by written request to your PI.
You do not have to participate in the genetic modifier study or the tissue repository to be in the remaining part of this study.
You will also be asked to complete several assessments that include questionnaires, motor function test, a neurological exam and a physical exam.
Study Type : | Observational |
Estimated Enrollment : | 800 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | Clinical Research Consortium for Spinocerebellar Ataxias (CRC-SCA) to Study Natural History Study of and Genetic Modifiers in Spinocerebellar Ataxias (SCA) |
Actual Study Start Date : | April 2010 |
Estimated Primary Completion Date : | May 2022 |
Estimated Study Completion Date : | May 2022 |

Group/Cohort | Intervention/treatment |
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Spinocerebellar Ataxia 1
If you decide to participate in this study, the following study procedures will be performed:
|
Genetic: All Participants
If you decide to participate in this study, we will collect 1 tablespoon (15 milliliters) of blood during the first/screening visit in order to extract your DNA. |
Spinocerebellar Ataxia 2
If you decide to participate in this study, the following study procedures will be performed:
|
Genetic: All Participants
If you decide to participate in this study, we will collect 1 tablespoon (15 milliliters) of blood during the first/screening visit in order to extract your DNA. |
Spinocerebellar Ataxia 3
If you decide to participate in this study, the following study procedures will be performed:
|
Genetic: All Participants
If you decide to participate in this study, we will collect 1 tablespoon (15 milliliters) of blood during the first/screening visit in order to extract your DNA. |
Spinocerebellar Ataxia 6
If you decide to participate in this study, the following study procedures will be performed:
|
Genetic: All Participants
If you decide to participate in this study, we will collect 1 tablespoon (15 milliliters) of blood during the first/screening visit in order to extract your DNA. |
- The disease's progression over time using clinical rating scales and timed performance measures. [ Time Frame: Indefinitely (for as long as the study is open and you wish to participate) ]
- Relation between the genetic modifiers and the age at onset of disease and disease progression rates. [ Time Frame: Indefinitely (for as long as the study is open and you wish to participate) ]
- The effects of the disease on the Activities of Daily Living (ADL)in patients with Spinocerebellar Ataxias [ Time Frame: indefinitely ]
Biospecimen Retention: Samples With DNA

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 6 Years and older (Child, Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
The Clinical Research Consortium for Spinocerebellar Ataxias (CRC-SCA) is seeking subjects to participate in a clinical research study of patients with SCA 1, 2 3 and 6.
Potential participants should have symptoms of ataxia with a diagnosis of SCA 1,2,3 or 6 established by DNA tests either on the patient himself or herself or another affected family member and be between 6 and 80 years of age. In addition, patients who have ataxia with a dominant inheritance pattern but who do not yet know what type of SCA they have can also be screened for this project.
Inclusion Criteria:
- Presence of symptomatic ataxic disease
- Definite molecular diagnosis of SCA 1, 2,3,or 6 either in the subject or another affected family member
- Willingness to participate in the study and ability to give informed consent.
- Age 6 years and above
Exclusion Criteria:
- Known recessive, X-linked and mitochondrial ataxias
- Exclusion of SCA 1, 2, 3 and 6 by previous DNA testing,
- A lack of willingness to participate in the study

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): NCT01060371
United States, California | |
University of California Los Angeles | Recruiting |
Los Angeles, California, United States, 90095 | |
Contact: Brian Clemente 310-206-8153 bclemente@mednet.ucla.edu | |
Principal Investigator: Susan Perlman, M.D. | |
University of California San Francisco | Recruiting |
San Francisco, California, United States, 94115 | |
Contact: Julia Glueck 415-502-7640 julia.glueck@ucsf.edu | |
Principal Investigator: Michael Geschwind, MD | |
United States, Florida | |
University of Florida | Recruiting |
Gainesville, Florida, United States, 32610 | |
Contact: SH Subramony, MD 352-273-5550 s.subramony@neurology.ufl.edu | |
Principal Investigator: S H Subramony, MD | |
University of South Florida | Active, not recruiting |
Tampa, Florida, United States, 33620 | |
United States, Georgia | |
Emory University | Recruiting |
Atlanta, Georgia, United States, 30320 | |
Contact: Rebecca MacMurray 404-728-4909 rebecca.s.mcmurray@emory.edu | |
Principal Investigator: George Wilmot, M.D., PhD. | |
United States, Illinois | |
University of Chicago | Active, not recruiting |
Chicago, Illinois, United States, 60637 | |
United States, Maryland | |
John Hopkins University | Recruiting |
Baltimore, Maryland, United States, 21287 | |
Contact: Ann Fishman 410-502-5816 ataxiaresearch@jhu.edu | |
Principal Investigator: Chiadi Onyike, M.D., MHS | |
United States, Massachusetts | |
Harvard University | Recruiting |
Boston, Massachusetts, United States, 02114 | |
Contact: Jason MacMore 617-726-3216 jmacmore@partners.org | |
Principal Investigator: Jeremy Schmahmann, M.D. | |
United States, Michigan | |
University of Michigan | Active, not recruiting |
Ann Arbor, Michigan, United States, 48109 | |
United States, Minnesota | |
University of Minnesota | Active, not recruiting |
Minneapolis, Minnesota, United States, 55455 | |
United States, New York | |
Columbia University | Recruiting |
New York, New York, United States, 10032 | |
Contact: Sheng-Han Kuo, MD 212-305-5558 sk3295@mail.cumc.colombia.edu | |
Principal Investigator: Pietro Mazzoni, M.D., PhD. | |
Sub-Investigator: Sheng-Han Kuo, M.D. | |
United States, Utah | |
University of Utah | Active, not recruiting |
Salt Lake City, Utah, United States, 84112 |
Principal Investigator: | S. Subramony, MD | University of Florida |
Responsible Party: | University of Florida |
ClinicalTrials.gov Identifier: | NCT01060371 |
Obsolete Identifiers: | NCT01223417 |
Other Study ID Numbers: |
IRB201700740 505-2009 ( Other Identifier: Legacy study ) OCR16458 ( Other Identifier: Universiy of Florida ) |
First Posted: | February 2, 2010 Key Record Dates |
Last Update Posted: | May 5, 2022 |
Last Verified: | May 2022 |
Spinocerebellar Ataxia Natural History Genetic Modifiers DNA testing |
Ataxia Cerebellar Ataxia Spinocerebellar Ataxias Spinocerebellar Degenerations Machado-Joseph Disease Dyskinesias Neurologic Manifestations Nervous System Diseases |
Cerebellar Diseases Brain Diseases Central Nervous System Diseases Spinal Cord Diseases Heredodegenerative Disorders, Nervous System Neurodegenerative Diseases Genetic Diseases, Inborn |