Neural and Visual Responses to Light in Bipolar Disorder: A Novel Putative Biomarker (LightEyeBD)
調査の概要
状態
条件
詳細な説明
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.
研究の種類
入学 (予想される)
連絡先と場所
研究場所
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Pennsylvania
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Pittsburgh、Pennsylvania、アメリカ、15213
- Western Psychiatric Institute and Clinic
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
説明
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.
研究計画
研究はどのように設計されていますか?
デザインの詳細
コホートと介入
グループ/コホート |
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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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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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visual evoked potentials (VEP) waveforms (mean amplitudes or latencies)
時間枠: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)
時間枠: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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協力者と研究者
スポンサー
捜査官
- 主任研究者:Dorothy Sit, M.D.、University of Pittsburgh
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
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