Integrated Functional Evaluation of the Cerebellum
Keywords
Abstract
Description
Spinocerebellar ataxias (SCAs) are autosomal dominantly inherited neurological disorders, characterized by a predominant atrophy of the cerebellum and the brainstem. The most common forms are caused by abnormal CAG repeat expansions, encoding elongated polyglutamine (polyQ).
Nowadays, no preventive or curative treatments are available but different therapeutic approaches are ongoing. Antisense oligonucleotides (ASOs) therapy showed promising results in Huntington disease (HD), a disease that shares with the SCAs the same mutational mechanism. ASOs are currently under development for SCAs.
However, in SCAs, clinical scales as an only criteria to monitor a treatment are not appropriate because of the lack of sensitivity of change and the small number of patients available. The importance to dispose of outcome measures to inform about the efficacy of a treatment is fundamental as well as of new alternative designs to conduct a clinical trial in rare diseases with small sample sizes.
A comprehensive, multimodal approach is hence needed to provide a translational and integrated overview of cerebellar dysfunction in polyQ SCAs over a year.
Dates
| Last Verified: | 05/31/2020 |
| First Submitted: | 02/16/2020 |
| Estimated Enrollment Submitted: | 02/24/2020 |
| First Posted: | 02/27/2020 |
| Last Update Submitted: | 06/02/2020 |
| Last Update Posted: | 06/04/2020 |
| Actual Study Start Date: | 05/27/2020 |
| Estimated Primary Completion Date: | 04/30/2021 |
| Estimated Study Completion Date: | 04/30/2022 |
Condition or disease
Intervention/treatment
Procedure: Lumbar puncture
Other: Magnetic Resonance Imaging (MRI)
Phase
Arm Groups
| Arm | Intervention/treatment |
|---|---|
| SCA early-manifest and premanifest patients This cohort is defined by individuals with a SARA score between 0 and 15 (both values included). | |
| Control participants This cohort is defined by individuals with a SARA score less than 5 and no significant neurological symptoms. |
Eligibility Criteria
| Ages Eligible for Study | 18 Years To 18 Years |
| Sexes Eligible for Study | All |
| Sampling method | Probability Sample |
| Accepts Healthy Volunteers | Yes |
| Criteria | Common inclusion criteria for all participants: - Ability to walk independently 30 foot without an assistive device - Able to stand unassisted for 30 seconds - Affiliated with the French social security, or a social security equivalent, if they are not French. - Capacity to consent - Signed Informed Consent by the subject - Ability to undergo MRI scanning Inclusion criteria for SCA patients: - Genetic diagnosis of SCA 2 or 7 (available CAG repeat length) - SARA score ≤15 Inclusion criteria for control participants: - Negative Genetic diagnosis of SCA2/SCA7 available - No significant neurological symptoms - SARA score < 5 Common inclusion criteria for elective participant for CSF sampling: • Ability to undergo a lumbar puncture Exclusion criteria - Subjects currently receiving, or having received within 2 months prior to enrolment into this study, any investigational drug - Pregnancy or breastfeeding - Genotype consistent with other inherited ataxias - Changes in coordinative physical and occupational therapy for ataxia 2 months prior to study participation - Concomitant disorder(s) or condition(s) that affects assessment of ataxia or severity of ataxia during this study - Contra-indications to MRI examination - Person deprived of their liberty by judicial or administrative decision |
Outcome
Primary Outcome Measures
1. Identification of biological, clinical and/or imaging biomarkers in SCA2 and SCA7 patients mutations carriers and patients through a multimodal assessment over one year to prepare therapeutic trials [Over one year]
Secondary Outcome Measures
1. To determine the cross-sectional and longitudinal variability of SARA (Scale for the Assessment and Rating of Ataxia) and CCFS (Composite Cerebellar Functional Score) scores in SCA 2 and SCA 7 gene mutation carriers and healthy controls over one [Over one year]
2. Determine the cross-sectional and longitudinal variability of volumetric MRI and NMR-proto spectroscopy in SCA 2 and SCA 7 gene mutation carriers and healthy controls [Over one year]
3. Delineate a specific pattern of frontal-like cognitive deficit in SCAs gene carriers [Over one year]
4. To determine the cross-sectional and longitudinal variability of CSF, blood and urine biomarkers in SCAs gene mutation carriers and controls [Over one year]
5. To explore the relationship of CSF, blood and urine biomarker levels in relation to clinical and imaging markers of disease progression [Over one year]
6. To assess the feedback of individuals for the disease (Most bothersome symptoms) [Over one year]
7. To assess the feedback of individuals for the disease thanks to quality of life questionnaires [Over one year]
8. To determine the cross-sectional and longitudinal variability of quantitative measures of postural stability, free walking and turning in SCA 2 and SCA 7 mutation carriers and healthy controls [Over one year]
9. To determine the cross-sectional and longitudinal variability of quantitative measures of oculomotor recording in SCA 2 and SCA 7 gene mutations carriers and healthy controls. [Over one year]
10. To determine the cross-sectional and longitudinal variability of optical coherence tomography in SCA 2 and SCA 7 gene mutations carriers [Over one year]
11. To determine the cross-sectional and longitudinal variability of adaptative optics in SCA 2 and SCA 7 gene mutations carriers [Over one year]
12. To determine the cross-sectional and longitudinal variability of autofluorescence, visual acuity, in SCA 2 and SCA 7 gene mutations carriers [Over one year]
13. To determine the cross-sectional and longitudinal variability of visual field in SCA 2 and SCA 7 gene mutations carriers [Over one year]
14. To determine the cross-sectional and longitudinal variability of colour contrast sensitivity in SCA 2 and SCA 7 gene mutations carriers [Over one year]
15. To determine the cross-sectional and longitudinal variability of electroretinogram in SCA 2 and SCA 7 gene mutations carriers [Over one year]
16. To determine the cross-sectional and longitudinal variability of static perimetry in SCA 2 and SCA 7 gene mutations carriers [Over one year]
17. To determine the cross-sectional and longitudinal variability of visual evoked potential in SCA 2 and SCA 7 gene mutations carriers [Over one year]
