- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT02048995
Neural and Visual Responses to Light in Bipolar Disorder: A Novel Putative Biomarker (LightEyeBD)
Studieöversikt
Status
Betingelser
Detaljerad beskrivning
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.
Studietyp
Inskrivning (Förväntat)
Kontakter och platser
Studieorter
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Pennsylvania
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Pittsburgh, Pennsylvania, Förenta staterna, 15213
- Western Psychiatric Institute and Clinic
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Testmetod
Studera befolkning
Beskrivning
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.
Studieplan
Hur är studien utformad?
Designdetaljer
Kohorter och interventioner
Grupp / Kohort |
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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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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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visual evoked potentials (VEP) waveforms (mean amplitudes or latencies)
Tidsram: 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)
Tidsram: 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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Samarbetspartners och utredare
Sponsor
Samarbetspartners
Utredare
- Huvudutredare: Dorothy Sit, M.D., University of Pittsburgh
Studieavstämningsdatum
Studera stora datum
Studiestart
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Uppskatta)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- PRO14010387
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