Joan Kotun

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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)
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)
To the Editor: Predictable rhythmic fluctuations, especially cir-cadian, have been observed in a wide variety of phys-iologicai 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)
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)
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