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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Relationship between cerebrospinal fluid amine metabolites, neuroendocrine findings and personality dimensions (Marke-Nyman scale factors) in psychiatric patients.

5-Hydroxyindoleacetic acid (5-HIAA) and homovanillic acid (HVA) were measured in the spinal fluid of 45 women hospitalized in a psychiatric department for major depression (14 cases), schizophrenia (18 cases) and alcohol dependence (13 cases). Dexamethasone suppression tests were performed following CSF examinations in all patients, and TRH stimulation tests were also made in six subjects. All biological examinations were carried out in a drug-free state. The Marke-Nyman Temperament scale was administered to all patients as soon as severe psychotic disturbances subsided and sufficient cooperation was achieved, but no later than 10 days following biological examinations. The MNT was repeated after recovery to check reliability of the test results during an episode of a psychiatric disorder. CSF amine metabolite concentrations did not differ significantly in the three patient groups; postdexamethasone average cortisol levels were above the critical level (5 micrograms/dl) in each group, the highest values being found in major depression. One of the three MNT factors was inhomogeneous among diagnostic groups (validity: low in depression and alcoholism), but the other two also differed from a healthy control population. Correlation structure between biological and psychological variables was homogeneous throughout the diagnoses and a significant inverse correlation was found only between CSF 5-HIAA and the validity factor of MNT. Maximal TSH response to TRH stimulation correlated with both solidity and stability in the MNT scale. Since MNT results proved to be stable even during an illness episode, a possible link is suggested between personality traits and central serotonin metabolism.[1]


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