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Magnetic Resonance Imaging of Cerebral Connectivity and Volume in Neurodegeneration and Glaucoma (EVOLUTION)
Studie Overzicht
Gedetailleerde beschrijving
Glaucoma is a neurodegenerative disease characterised by a progressive loss of retinal ganglion cells, typical optic neuropathy with a loss of visual field and visual function. High intraocular pressure is it's main risk factor, but the patophysiology hasn't been clearely understood, as there exist forms with normal ocular pressure (NTG - normal tension glaucoma) or mixed forms. Studies have shown that the degeneration is not limited to retinal ganglion cells only, but rather it affects the whole visual pathway including the occipital cortex. The ENVOL study has been able to show microstructural alterations of the optic radiations in glaucoma. Furthermore, glaucomatous patients have been found to be more at risk of developing other neurodegenerative diseases, namely Alzheimer's disease.
The EVOLUTION study is set to repeat 3T brain MRI in patients previously enrolled in ENVOL in order to compare brain microstructure between glaucomatous and matched healthy subjects, assess their ocular status and glaucoma progression over time, as well as compare them with orignal imagery from 10 years prior.
gression over time, as well as compare them with orignal imagery from 10 years prior.
Study subjects will undergo a typical non-invasive ophthalmic screening comprised of best-corrected visual acuity testing, slit-lamp biomicroscopy, gonioscopy, indirect opthalmoscopy, fundus photography, 30° visual field testing and optical coherence tomography of the optic nerve. They will also answer a questionnaire concerning their medical treatment, cardiovascular health and tobacco use. Next, they will undergo a 3T brain MRI comprised of a T1-weighted 3D morphological sequence, 3D FLAIR, resting state fMRI and diffusion tensor imaging.
fMRI and diffusion tensor imaging
Studietype
Inschrijving (Geschat)
Fase
- Niet toepasbaar
Contacten en locaties
Studiecontact
- Naam: Cedrick Schweitzer, MD, PhD
- Telefoonnummer: +335 56 79 55 30
- E-mail: cedric.schweitzer@chu-bordeaux.fr
Studie Locaties
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Bordeaux, Frankrijk
- Werving
- CHU Bordeaux
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Contact:
- Cedrick Schweitzer, MD, PhD
- Telefoonnummer: +335 56 79 55 30
- E-mail: cedric.schweitzer@chu-bordeaux.fr
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Beschrijving
Inclusion Criteria:
- having been previously included and completed the ENVOL study
- Ability and willingness to provide informed consent
- Having a valid health insurance in France
In glaucoma group :
- Glaucomatous optic neuropathy, being able to be graded by the vertical C/D ratio
- Open angle on gonioscopy in a dark-room testing according to Shaffer's classification (grade 3 or grade 4)
Visual field impairement (at least one of the following) :
- 3 adjacent points with at least 5dB loss
- one point with a loss of 10dB
- a difference of at least 10 dB for 2 adjacent points on either side of the horizontal meridian of the nasal visual field
- Mini Mental State Score of at least 28
In control group :
- No personal or family history of glaucoma or ocular hypertension (IOP > 21 mmHg)
- Open angle on gonioscopy in a dark-room testing according to Shaffer's classification (grade 3 or grade 4)
- Intraocular pressure of ≤ 21 mmHg
- Absence of glaucomatous neuropathy
- Normal visual field
Exclusion Criteria:
- Inability/unwillingness to provide informed consent
- Other causes of ocular hypertension (trauma, uveitis)
- Non-glaucomatous optic neuropathy (infectious, inflammatory, compressive, ischemic)
- Unreliable visual field (>15% false positives, >33% false negatives or >20% loss of fixation)
- Severe corneal pathology preventing access to fundus, visual field testing or altering ocular tonometry
- Contraindications to MRI testing (pacemakers or neurosensory stimulators, cochlear implants, ferromagnetic foreign bodies, claustrophobia)
- Patients under guardianship or other form of legal protection
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Ander
- Toewijzing: Niet-gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: Patient with glaucoma
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MRI
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Actieve vergelijker: Patient without glaucoma
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MRI
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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structural and functional connectivity matrices
Tijdsspanne: Baseline
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10-year whole brain comparison of structural and functional connectivity matrices (Hub Disruption Index) on 3T MRI in glaucoma patients and controls from the ENVOL study
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Baseline
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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microstructural changes
Tijdsspanne: Baseline
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Comparison of microstructural changes on diffusion MRI within the whole brain and by specific regions (white matter, gray matter, hippocampus, amygdala, occipital cortex) between the 2 groups (voxel-by-voxel analysis)
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Baseline
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cerebral volumes
Tijdsspanne: Baseline
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Comparison of cerebral volumes (total volume of cerebral parenchyma), and volumes of specific regions (white matter, gray matter, hippocampus, amygdala, occipital cortex) between the 2 groups
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Baseline
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Evolution of the above parameters
Tijdsspanne: Baseline
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Comparison of evolution of the above parameters over a 10-year period between the ENVOL study and EVOLUTION follow-up study (microstructural changes on diffusion MRI within the whole brain and by specific regions (white matter, gray matter, hippocampus, amygdala, occipital cortex), cerebral volumes (total volume of cerebral parenchyma), and volumes of specific regions (white matter, gray matter, hippocampus, amygdala, occipital cortex)).
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Baseline
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Demographic factors
Tijdsspanne: Baseline
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Identication of demographic that could be associated with overall degenerative impairment as measured in the primary objective and secondary objectives above
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Baseline
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Ophthalmological factors
Tijdsspanne: Baseline
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Ophthalmological factors, notably characterization of the type of glaucoma (normal pressure, high pressure) that could be associated with overall degenerative impairment as measured in the primary objective and secondary objectives above
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Baseline
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Medewerkers en onderzoekers
Sponsor
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Geschat)
Studie voltooiing (Geschat)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- CHUBX 2024/90
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
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