Pattern Electroretinography (pERG)
est développé par Medical University of Vienna.
Le traitement est actuellement en Non applicable.
Il est associé à Alzheimer.
Son objectif thérapeutique principal est Neuroprotection + Ralentissement de la progression.
Le statut actuel est : suivi actif.
À vérifier
Neuroprotection + Ralentissement de la progression
Non applicable
Medical University of Vienna
Austria
Glaucoma is characterized by a progressive loss of retinal ganglion cells (RGCs) leading to optic nerve head (ONH) damage and associated visual field defects. The main risk factor for glaucoma is elevated intraocular pressure (IOP). Reducing IOP slows down the progression of the disease as several large multicenter trials have shown. Some patients, however, still progress despite adequately controlled IOP. As such, there is considerable interest in approaches that rescue RGCs independent of IOP, a strategy called neuroprotection. Although this field was actively discovered in the last 20 years in the brain and the eye, no non-IOP related treatment is clinically available to date. Various approaches are currently studied in some detail. One interesting strategy focuses on the neurovascular unit.
The blood flow of the human retina is controlled by complex mechanisms that include myogenic, metabolic and hormonal factors. The high consumption of oxygen in the human retina is crucial for normal functioning of the organ. As in the brain, blood flow in the retina is also controlled by neurovascular coupling. This means that the retina increases its blood flow to regions in which neurons are activated. This is done in an effort to provide more oxygen and glucose to the active neurons. In the recent years evidence has accumulated that astrocytes play a key role in mediating this vasodilator signal.
In the brain, abnormalities in neurovascular coupling have been observed in diseases like stroke, hypertension, spinal-cord injury and Alzheimer's disease. This break-down of neurovascular coupling is considered to play a key role in neuronal death in these diseases. In the retina, abnormalities in neurovascular coupling have been observed in diseases as diabetes and glaucoma.
Most of the data obtained in the human retina stem from a system that measures retinal vasodilatation during stimulation with flickering light. The investigators have previously shown that flicker stimulation of the retina is, however, also associated with a pronounced increase in retinal blood velocities. In this study the investigators employed laser Doppler velocimetry (LDV) for the measurement of retinal blood velocities, but this technique is not clinically applicable because it requires excellent fixation of the subject under study. In the present study, the investigators propose to use an alternative system for neurovascular coupling that they have developed recently. In this approach, the investigators use bi-directional Fourier-domain optical coherence tomography for the assessment of retinal blood flow. Optical coherence tomography (OCT) is a non-invasive optical imaging modality enabling cross-sectional tomographic in vivo visualization of internal microstructure in biological systems. In ophthalmology, OCT has become a standard tool in visualizing the retina and nowadays is considered also as a standard tool in the diagnosis of retinal disease. In the recent years, conventional time domain OCT was replaced by Fourier domain OCT providing significantly improved signal quality.
This bidirectional system overcomes the limitations of previously realized techniques, which include doubtful validity and limited reproducibility. In addition, pattern ERG, multifocal ERG and oscillatory potentials will be measured to allow for concomitant assessment of neural function.
The investigators seek to measure neurovascular coupling in the human retina in patients with early primary open angle glaucoma (POAG), normal tension glaucoma, ocular hypertension and a healthy control group. In order to obtain information on neurovascular coupling, both neuronal function as well as retinal blood flow need to be measured. In the present study, the investigators will employ pattern ERG, multifocal ERG as well as oscillatory potentials to assess the function of the inner retina. Retinal blood flow through major retinal arterial and venous branch vessels will be measured before, during and after flicker stimulation with the dual-beam bidirectional Fourier Domain Doppler OCT coupled to the commercially available Dynamic Vessel Analyzer (DVA) produced by IMEDOS, Jena, Germany, which provides adequate resolution to study the retinal circulation.
2025-05-20
Début phase actuelle
Non disponible dans les sources synchronisées
Timeline clinique
Non applicable
Préclinique
Phase 1
Phase 2
Phase 3
Approuvé
Objectif scientifique de l’étude
classification automatique vérifiable
NeuroprotectionRalentissement de la progressionConfiance automatique : 80%
Ce pourcentage n’est pas une probabilité de succès clinique.
Il mesure uniquement la force de la classification automatique de l’objectif scientifique. Le calcul part de 45 points, ajoute 7 points par unité de poids du mot-clé le plus fortement détecté, puis est plafonné à 95 %. Exemple : un score maximal de 2 donne 45 + (2 × 7) = 59 %.
Indices détectés : neuroprotect → Neuroprotection, progression → Ralentissement de la progression
Ce score est heuristique et doit être vérifié dans le protocole ou une publication.
Aucune incohérence majeure détectée entre la maladie, l’objectif et la description.
Transparence et qualité de la fiche
données vérifiables
ClassificationCohérente automatiquement
Confiance de la fiche100 %
Source principaleSource officielle ou publication indexée
Dernière vérification2025-05-20
Anomalies détectées0
Validation humaineValidation humaine non effectuée
Donnée issue d’une sourceDonnée normalisée automatiquementInterprétation algorithmique
Classification scientifique multi-axes
ne pas confondre statut et résultat
État de l’étudeStatut inconnu
Disponibilité des résultatsRésultats à vérifier
InterprétationImpossible à déterminer
Niveau de preuveNon évaluable
Un essai terminé n’est pas nécessairement positif. Un essai arrêté n’est classé comme échec scientifique que lorsqu’un résultat ou une raison explicite le confirme.
Indicateurs factuels
sans score subjectif
Phase enregistréeNon applicable
Études associées0
Publications associées0
Statut consolidéSuivi actif
Aucune chance de succès, note d’innovation, potentiel thérapeutique ou probabilité de commercialisation n’est calculé tant qu’un modèle validé et des données suffisantes ne sont pas disponibles.
Historique factuel de la molécule
1 événement(s) daté(s)
Cette liste reprend uniquement les dates trouvées dans les registres et publications liés. Elle ne constitue pas une prévision.
Date
Événement
Source
2025-05-20
Dernière mise à jour des donnéesPattern Electroretinography (pERG)
Ces sources sont proposées pour vérification. Les informations de la fiche doivent être confirmées dans les registres officiels ou les publications originales.