Platelet MAO activity in personality disorders and normal controls

1990 ◽  
Vol 33 (3) ◽  
pp. 221-227 ◽  
Author(s):  
Christopher Reist ◽  
Richard J. Haier ◽  
Edward DeMet ◽  
Aleksandra Chicz-DeMet
2008 ◽  
Vol 61 (7-8) ◽  
pp. 383-388 ◽  
Author(s):  
Saveta Draganic-Gajic ◽  
Dusica Lecic-Tosevski ◽  
Dragan Svrakic ◽  
Vladimir Paunovic ◽  
Vesna Cvejic ◽  
...  

Introduction. In this study we test the hypothesis that specific behavioral and biochemical vulnerabilities characterize individuals with hyperthyroidism - Graves type, one of the classically cited 'psychosomatic disorders'. Material and methods. The sample included 24 subjects with Graves disease and 34 controls. All participants were evaluated for personality and temperament characteristics and for platelet MAO activity. A smaller group of panic disorder patients was tested with the same set of measures to ensure a validity of the study, especially regarding results on personality tests. RESULTS. Individuals with hyperthyroidism had lower platelet MAO activity and higher scores on histrionic (Hy), depressive (D) and hypochondriac (H) subscale on the MMPI-201 than normal controls. Their TPQ temperament scores were characterized by high Harm Avoidance, whereas other temperament traits were average. Platelet MAO activity was inversely correlated with the MMPI-201 psychopatic deviance scale (Pd) and positively correlated with the TPQ Reward Dependence scale. CONCLUSIONS. Our results provide support for the psychosomatic concept of Graves' disease. Personality features, temperament traits, and platelet MAO activity of hyperthyroid individuals are different from those in normal controls and correspond to those observed in anxiety disorders. We propose that the observed behavioral and biochemical similaritites between hyperthyroid and anxiety disorder patients represent an equicausality phenomenon, where the same underlying heritable factors, such as variable central monoaminergic activity coupled with temperament-related susceptibility to stress, facilitate phenotypic manifestation of a number of psychosomatic and psychiatric disorders - including Graves disease. The observed correlations between personality traits and MAO activity provide support for the hypothesized functional relationship between the underlying central monoaminergic activity and temperament traits associated with anxiety, depression, and impulsivity.


1996 ◽  
Vol 94 (2) ◽  
pp. 105-111 ◽  
Author(s):  
P. O. Alm ◽  
B. Klinteberg ◽  
K. Humble ◽  
J. Leppert ◽  
S. Sörensen ◽  
...  

1989 ◽  
Vol 19 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Joanne Boyd Irving ◽  
Robert D. Coursey ◽  
Monte S. Buchsbaum ◽  
Dennis L. Murphy

SynopsisThe present study, using a diathesis-stress model, attempted to confirm prior findings with platelet monoamine oxidase (MAO) activity and stress in a middle-aged, non-clinic population. One hundred and seventy-eight adult males from a statewide community club were tested for platelet MAO activity and stressful life events and were also given a variety of psychological measures of both psychopathology and psychosocial coping. The data were examined both for correlations across the total sample and for a comparison of high-risk groups (top and bottom 15% of MAO activity) with a middle MAO group. Low platelet MAO activity was related to a higher incidence of contact with mental health professionals, and more frequent use of alcohol and cigarette smoking. High MAO activity was related to higher levels of anxiety and somatization. High levels of stress were related to increased psychosocial problems reported for female and family members, higher scores on two schizophrenia-related MMPI scales (schizophrenia and paranoia subscales), but fewer idiosyncratic associations, elevated hypomanic, depression, and anxiety scores, increased alcohol use, and increased use of prescribed antianxiety and sedative medication. Neither MAO nor stress were related to current levels of psychosocial coping. Moreover, no interaction effects were uncovered for MAO activity and stress combined.


1985 ◽  
Vol 147 (6) ◽  
pp. 730-731 ◽  
Author(s):  
E. G. Th. M. Hartong ◽  
J. G. Goekoop ◽  
E. J. M. Pennings ◽  
G. M. J. van Kempen

1981 ◽  
Vol 139 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Frank Owen ◽  
Rachel C. Bourne ◽  
Timothy J. Crow ◽  
Eve C. Johnstone ◽  
Adnam A. Fadhli

SummaryPlatelet MAO activity was assessed in 35 schizophrenics during a trial of the isomers of flupenthixol. Enzyme activity was unrelated to severity of symptoms, the presence of delusions, hallucinations or thought disorder or to negative symptoms. In a few patients MAO activity fluctuated widely with time, but in the group of patients on medication there was a slow decrease in enzyme activity which was significant after 28 days of treatment. Enzyme activity after 14 days' drug treatment was still correlated with activity before treatment, but after 28 days this significant correlation disappeared. Slow effects of neuroleptic drugs on platelet MAO activity may explain previous findings of reduced activity of the enzyme in schizophrenia.


1998 ◽  
Vol 32 (1) ◽  
pp. 49-54 ◽  
Author(s):  
C.K. Farren ◽  
A.W. Clare ◽  
K.F. Tipton ◽  
T.G. Dinan

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