- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT02048995
Neural and Visual Responses to Light in Bipolar Disorder: A Novel Putative Biomarker (LightEyeBD)
Aperçu de l'étude
Statut
Les conditions
Description détaillée
The study goal is to understand how the response to light therapy relates to changes in vision, brain function and improvement in bipolar symptoms. The aims are to investigate mood levels plus the eye and brain responses to visual contrast stimuli in healthy comparators (HC) and bipolar depressed patients.
Study Design and Methods. Overview. The investigators plan to enroll 18-50 year old adults with BD Type I or II and a current episode of major depression on stable-dosed antimanic drugs, and age and sex-matched HC - without mental disorders. Depressed patients with BD will be assigned randomly to receive active light therapy vs inactive comparator for 6 weeks. The investigators will examine responses to contrast stimuli from measures of visual evoked potentials and electro-retinography in HC and depressed bipolar patients before and after 6-weeks of daily midday light therapy. The investigators will assess repeated measures of mood symptom levels, attention and circadian rhythms.
Type d'étude
Inscription (Anticipé)
Contacts et emplacements
Lieux d'étude
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Pennsylvania
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Pittsburgh, Pennsylvania, États-Unis, 15213
- Western Psychiatric Institute and Clinic
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- Ages 18-50 years.
- DSM-IV BD Type I or II, current major depressive episode
- Stable-dosed antidepressant drug for 4 weeks or more only with concurrent antimanic drug.
- Controlled thyroid disease.
- Subjects with preexisting eye diseases will be included specific exceptions are described in the Exclusion Criteria.
- Able to provide informed consent.
- Stable minimum dose of antimanic drug for 4weeks or more.
- Stable unchanged psychotherapy for 16 weeks or more.
- Permitted drugs for sleep at low doses.
Exclusion Criteria:
- Certain specific eye diseases (retinal disease, untreated cataracts or macular degeneration)
- Photosensitizing drugs such as phenothiazines (chlorpromazine), antimalarial drugs, melatonin and hypericum.
- Acute psychosis (DSM-IV Criteria)
- Rapid cycling in the past 1 year
- Alcohol or substance abuse or dependence in the past 6 months.
- Current symptoms of hypomania or mania i.e. ManiaRatingScale=5
- Recent history of a suicide attempt (3 months) or active suicidal ideation (SIGH-ADS item H11=2 or more)
- Treatment with propranolol (Inderal), exogenous melatonin, chronic NSAIDS.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
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Bipolar Depressed
Bipolar Depressed - are participants with Bipolar Disorder Type I or II and a current episode of major depression which is confirmed on the SCID interview
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Healthy Comparator
Healthy Comparator - are participants without mental disorders, alcohol or substance disorders confirmed by the SCID-interview
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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visual evoked potentials (VEP) waveforms (mean amplitudes or latencies)
Délai: Week 0 and Week 6
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Visual Evoked Potential (VEP).
This is a test which is used to assess visual cortical responses.
The VEP recordings will be assessed at different contrast levels (80%, 16% and 7%) for the patient groups (BD vs HC).
To assess the change in visual cortical responses, we will compare differences in the VEP responses between Weeks 0 and 6 between the groups.
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Week 0 and Week 6
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Electroretinography (ERG) waveforms (mean amplitudes or latencies)
Délai: Week 0 and Week 6
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Electroretinogram (ERG).
This is a test which is used to assess electrical responses of the retina.
The ERG recordings will be assessed at different contrast levels (80%, 16% and 7%) for the patient groups (BD vs HC).
To assess the change in retinal responses, we will compare differences in ERG responses between Weeks 0 and 6 between the groups.
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Week 0 and Week 6
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Dorothy Sit, M.D., University of Pittsburgh
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
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
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- PRO14010387
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