Bipolar Depression Clinical Trial
Official title:
Neural and Visual Responses to Light in Bipolar Disorder: A Novel Putative Biomarker
Objective. Bipolar Disorders (BD) are a major public health problem. The investigators still lack knowledge of the mechanisms which contribute to BD. Hence treatments are few and limited, and clinical decision making is less refined. Currently, the investigators are investigating the effects of midday bright light therapy for the treatment of bipolar depression (University of Pittsburgh IRB approved protocol titled Light Therapy for Bipolar Disorder, IRB#: PRO09020546). In this study, the investigators propose to investigate a possible biological mechanism which might explain response to light treatment in depressed bipolar patients.
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.
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