- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT06661564
Identification de biomarqueurs de diagnostic dans les larmes des patients atteints de la maladie d'Alzheimer : l'étude pilote COG-EYE (COG-EYE)
Identification De Biomarqueurs Diagnostiques Dans Les Larmes De Patients Atteints De Maladie D'Alzheimer : L'étude Pilote COG-EYE
The diagnosis of Alzheimer's disease (AD) relies on the detection of protein biomarkers, particularly in cerebrospinal fluid (e.g., Aβ and phosphorylated Tau) or through brain imaging. The invasive nature of lumbar puncture and the numerous contraindications have driven the search for early and reliable diagnostic biomarkers for AD.
Human tears are an accessible biological fluid that has proven relevant in the biomarker search strategy for both ophthalmological and systemic diseases, especially neurodegenerative conditions. Advances in methods for low-volume analysis have facilitated the identification of tear biomarkers. Total tau has been reported as elevated in the tears of patients with AD compared to controls (n=65). Additionally, metabo-lipidomic analyses offer several advantages (accessibility, non-invasiveness, reproducibility) and also appear promising as a diagnostic tool for systemic and neurodegenerative diseases, such as amyotrophic lateral sclerosis. This supports the relevance of comparing both AD proteins biomarkers and metabo-lipidomic signatures in the tears of patients with AD (Mild Cognitive Impairement (MCI) and dementia) with healthy controls.
Aperçu de l'étude
Statut
Les conditions
Type d'étude
Inscription (Estimé)
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
- Nom: Victoire LEROY, MD
- Numéro de téléphone: 0247477693
- E-mail: victoire.leroy@univ-tours.fr
Sauvegarde des contacts de l'étude
- Nom: Raoul Kanav KHANNA, MD, PhD
- E-mail: raoul.khanna@univ-tours.fr
Lieux d'étude
-
-
France
-
Tours, France, France, 37044
- Recrutement
- CHRU de Tours
-
Chercheur principal:
- Victoire LEROY, MD
-
Contact:
- Victoire LEROY
- Numéro de téléphone: +332 47 47 76 93
- E-mail: victoire.leroy@univ-tours.fr
-
Contact:
- Coralie TAILLEBUIS
- Numéro de téléphone: +332 47 47 39 09
- E-mail: cpcq@chu-tours.fr
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Age ≥18 years
- Participant affiliated in French Social Security scheme
- Informed and written consent from the participant
Exclusion Criteria:
- Pregnant or breastfeeding woman
- Participant under judicial protection measures
- Participant under guardianship or curatorship
- Contraindications to participation in the research:
Other neurodegenerative disease Any eye drops or treatment that may interfere with tear production Occasional or permanent contact lens use within the last 3 months Eye surgery ≤3 months Any ocular pathology other than refractive errors, oculomotor disorders, amblyopia Any general pathology other than AD with ocular implications
-Inability to perform tear collection
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Diagnostique
- Répartition: Non randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Comparateur actif: Patients with AD dementia
Patient ≥ 18 years old with AD at a major stage according to the 2018 NIA-AA criteria (dementia) |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers |
|
Comparateur actif: Patients with AD Mild Cognitive Impaiment (MCI)
Patient ≥ 18 years old with AD at a minor stage according to the 2018 NIA-AA criteria (Mild Cognitive Impairment) |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers Collection of a blood sample (5 mL) for blood biomarkers analysis. |
|
Comparateur factice: Healthy controls
Participants ≥ 18 years old with no known central neurological pathology, no cognitive decline, and matched by age (± 2 years) and sex with a patient from AD-MCI group |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers |
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Concentration of total Tau proteins in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphorylated Tau proteins in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-40 proteins in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-42 in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Lipids in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Lipids in tears of patients with AD vs healthy volunteers |
At inclusion
|
|
Metabolites in basal tears of patients with AD vs healthy volunteers
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Metabolites in tears of patients with AD vs healthy volunteers |
At inclusion
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Concentration of total Tau proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphylated Tau proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Concentration of Amyloid β 1-40 proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Concentration of Amyloid β 1-42 proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Lipids in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of lipids in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Metabolites in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of metabolites in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Concentration of total Tau proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphorylated Tau proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-40 proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-42 proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Lipids in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of lipids in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Metabolites in basal tears of patients with AD-dementia vs patients with AD-MCI
Délai: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of metabolites in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Directeur d'études: Victoire LEROY, MD, CHRU de Tours
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Maladies du cerveau
- Maladies du système nerveux central
- Maladies du système nerveux
- Les troubles mentaux
- Blessures et Blessures
- Troubles neurocognitifs
- Démence
- Tauopathies
- Maladies neurodégénératives
- Maladie d'Alzheimer
- Lacérations
- Acides aminés, peptides et protéines
- Protéines de tissu nerveux
- Protéines
- Protéines microtubuleuses
- Protéines cytosquelettiques
- Protéines associées aux microtubules
- protéines tau
Autres numéros d'identification d'étude
- DR240140
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Description du régime IPD
Qualified researchers may obtain access to all deidentified data in COG-EYE on a substantial request.
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Étudie un produit d'appareil réglementé par la FDA américaine
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