Hypothalamopituitary adrenal (HPA) axis dysfunction occurs frequently in patients with major depression. The relationship of HPA dysfunction to the development of depressive symptomatology remains an enigma. The proposed study is to determine the significance of HPA axis abnormalities in major depression. The study tests the hypothesis that hypercortisolemia is related to the occurrence of cognitive impairment and cerebral atrophy in depression. Cognitive impairment is measured using a computerized cognitive neuromotor test battery and by paper and pencil tasks. The tasks chosen for this battery are those known to the affected by glucocorticoids. Cerebral atrophy and other neuroanatomical/physico chemical changes are assessed using Magnetic Resonance Imaging (MRI). Twenty four hour urine free cortisol and nocturnal multiple time point cortisol and the dexamethasone suppression test sampling are used as indices of hypercortisolemia. In addition, the study will examine the relationship between adrenocortical hyperplasia as measured by computerized tomography of the adrenal gland, measures @of HPA function, cognitive impairment and changes on MRI. The relationship ;between reversibility of HPA function and cognitive changes, MRI changes and adrenocortical hyperplasia will also be assessed. These studies will provide a better understanding of the pathophysiology of hypercortisolemia in depression and may lead to novel management approaches in the .prevention and treatment of depression. These studies will also lead to a more comprehensive and definitive knowledge about the nature and severity of cognitive deficits and neuroanatomical changes in patients with depression. They will also advance our understanding of the neurobiological basis of cognitive dysfunction in depression and the psychobiology of stress.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Project (R01)
Project #
5R01MH044716-02
Application #
3384120
Study Section
Psychopathology and Clinical Biology Research Review Committee (PCB)
Project Start
1989-09-01
Project End
1992-08-31
Budget Start
1990-09-01
Budget End
1991-08-31
Support Year
2
Fiscal Year
1990
Total Cost
Indirect Cost
Name
Duke University
Department
Type
Schools of Medicine
DUNS #
071723621
City
Durham
State
NC
Country
United States
Zip Code
27705
Thakur, M; Hays, J; Ranga, K et al. (1999) Clinical, demographic and social characteristics of psychotic depression. Psychiatry Res 86:99-106
Parsey, R V; Krishnan, K R (1998) Quantitative analysis of T2 signal intensities in Alzheimer's disease. Psychiatry Res 82:181-5
Lazeyras, F; Charles, H C; Tupler, L A et al. (1998) Metabolic brain mapping in Alzheimer's disease using proton magnetic resonance spectroscopy. Psychiatry Res 82:95-106
Parashos, I A; Tupler, L A; Blitchington, T et al. (1998) Magnetic-resonance morphometry in patients with major depression. Psychiatry Res 84:7-15
Shedlack, K J; McDonald, W M; Laskowitz, D T et al. (1994) Geniculocalcarine hyperintensities on brain magnetic resonance imaging associated with visual hallucinations in the elderly. Psychiatry Res 54:283-93
Doraiswamy, P M; Patterson, L; Na, C et al. (1994) Bicaudate index on magnetic resonance imaging: effects of normal aging. J Geriatr Psychiatry Neurol 7:13-7
Shedlack, K J; Lee, E K; Radtke, R A et al. (1994) Ipsilateral subcortical atrophy associated with temporal lobectomy. Psychiatry Res 54:295-304
Charles, H C; Lazeyras, F; Krishnan, K R et al. (1994) Brain choline in depression: in vivo detection of potential pharmacodynamic effects of antidepressant therapy using hydrogen localized spectroscopy. Prog Neuropsychopharmacol Biol Psychiatry 18:1121-7
Axelson, D A; Doraiswamy, P M; McDonald, W M et al. (1993) Hypercortisolemia and hippocampal changes in depression. Psychiatry Res 47:163-73
Krishnan, K R; McDonald, W M; Doraiswamy, P M et al. (1993) Neuroanatomical substrates of depression in the elderly. Eur Arch Psychiatry Clin Neurosci 243:41-6

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