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We have previously shown that a number of depressed patients demonstrated a failure to suppress corticotrophic secretion, as measured by beta-Endorphin/beta-Lipotropin (beta-End/beta-LPH levels), following dexamethasone challenge. The current study is an extension and replication of these findings, as well as an analysis of some of the biological variables(More)
As ceruloplasmin and copper abnormalities have been implicated in schizophrenia, we investigated the role of a second copper-containing non-ceruloplasmin protein, the iron oxidase ferroxidase II, in a prospective study of ten inpatients with schizophrenia and a comparison group. Ferroxidase II is a protein known to reciprocally regulate with ceruloplasmin(More)
We assessed scalp-recorded movement related potentials (MRPs) generated prior to voluntary movements in chronic, medicated schizophrenics (n = 9) and age matched normal controls (n = 9). MRPs were recorded in a self-paced button press task in which subjects pressed a button with either their right, left or both thumbs (experimental condition I, II and III(More)
OBJECTIVE To determine if corticotroph nonsuppression, as reflected by beta-endorphin nonsuppression, occurs before cortisol nonsuppression (defined as a cortisol level of > 140 nmol/L) when examining multiple time points in a day. SETTING The General Medical Clinical Research Center and Inpatient Depression Research Unit, Ann Arbor, Mich. DESIGN(More)
Studies in depression using a maximal stimulatory dose of corticotropin releasing factor have concluded that elevated resting cortisol levels in depressed patients exert a negative feedback effect on the corticotroph, resulting in a decreased corticotropin response. In this preliminary report, we examine the effects of a submaximal dose of corticotropin(More)
Circadian rhythm abnormalities have been demonstrated in people with depression, including a tendency toward maximal symptom severity in the morning. Although a few studies have suggested that symptoms in people with anxiety are worse later in the day, no detailed study of this observation has been reported. In 86 patients with anxiety disorders (63 with(More)
To the Editor: Predictable rhythmic fluctuations, especially circadian, have been observed in a wide variety of physiologicai and psychological functions. Abno~a~ities of circadian patterns have been documented in people with depression, including a tendency for maximal severity of depression in the morning; however, patients with anxiety or mixed(More)
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