Loading...
Please wait, while we are loading the content...
Similar Documents
Melatonin suppression by light in euthymic bipolar and unipolar patients.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nurnberger, John J. I. Adkins, Sherry Lahiri, Debomoy K. Mayeda, Aimee R. Hu, - Lewy, Alfred Miller, Adam Bowman, Elizabeth S. Miller, Michael J. Rau, L. Smiley, Clayton Davis-Singh, D. |
| Copyright Year | 2000 |
| Abstract | BACKGROUND Previous studies have suggested that bipolar patients are supersensitive to light suppression of melatonin and that this may be a trait marker for genetic vulnerability. The present study was an attempt to replicate and extend this observation. Propranolol hydrochloride effects were compared with light effects because of the documented influence of beta-adrenergic receptors on melatonin production. Nighttime levels of corticotropin and cortisol were also examined as potential trait vulnerability markers. METHODS Melatonin levels in euthymic bipolar patients (n= 29) were tested before and after 500-lux light was administered between 2 and 4 AM and on a separate night in the dark. Results were compared with those of a group of patients with unipolar depression (n= 24) and with those of a group of non-psychiatrically ill control subjects (n= 50). Lithium effects and propranolol effects were tested in subgroups. RESULTS No group differences were seen in light suppression among bipolar patients, unipolar patients, and controls; an analysis of the whole group did not reveal differences in propranolol effect, differences in corticotropin or cortisol levels, or evidence for a lithium effect. However, patients with bipolar I affective disorder showed the following: (1) significantly lower melatonin levels on the light night, at baseline and following light exposure; and (2) a later peak time for melatonin on the dark night. CONCLUSIONS The general hypothesis of increased light sensitivity in bipolar patients was not supported. However, melatonin secretion abnormalities were confirmed in the subgroup with bipolar I disorder. Further assessments of circadian rhythm disruption as a vulnerability marker in bipolar illness are indicated. |
| Starting Page | 1 |
| Ending Page | 8 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://archpsyc.jamanetwork.com/journals/PSYCH/articlepdf/481612/yoa8198.pdf |
| Alternate Webpage(s) | http://archpsyc.jamanetwork.com/pdfaccess.ashx?url=/data/journals/psych/11807/yoa8198.pdf |
| PubMed reference number | 10839335v1 |
| Volume Number | 57 |
| Issue Number | 6 |
| Journal | Archives of general psychiatry |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Adrenergic Receptor Bipolar Disorder Congenital Abnormality Document completion status - Documented Hydrocortisone Inappropriate ADH Syndrome Lithium Melatonin Mood Disorders Patients Photophobia Propranolol Hydrochloride Sleep Disorders, Circadian Rhythm Unipolar Depression beta-adrenergic receptor |
| Content Type | Text |
| Resource Type | Article |
