Document Detail


Decrease in red blood cell L-tryptophan uptake in schizophrenic patients: possible link with loss of impulse control.
MedLine Citation:
PMID:  8539427     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. Kinetic parameters of erythrocyte L-tryptophan (TRP) uptake (Vmax, maximal velocity and Km, Michaelis constant) were determined in 19 neuroleptic-free schizophrenic patients and in 19 healthy volunteers. Both Vmax and Km values were significantly lower in schizophrenic patients than in controls. 2. Mean Vmax value was found to be lower in patients who had attempted suicide than in patients who had not. No difference was observed when patients were subdivided on the basis of the violence of suicide attempts. 3. A significant negative correlation was observed between Vmax and scores on the loss of impulse control item as assessed on the PANS scale. 4. Decrease in red blood cell L-TRP uptake reflects a disturbance in the peripheral metabolism of TRP that may result in a deficiency of the plasma L-TRP availability on which the central serotonin (5HT) synthesis closely depends. 5. In addition, the results suggest that the alteration in RBC L-TRP uptake is associated with loss of impulse control in schizophrenic patients.
Authors:
F Serres; D Dassa; J M Azorin; R Jeanningros
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Progress in neuro-psychopharmacology & biological psychiatry     Volume:  19     ISSN:  0278-5846     ISO Abbreviation:  Prog. Neuropsychopharmacol. Biol. Psychiatry     Publication Date:  1995 Sep 
Date Detail:
Created Date:  1996-02-07     Completed Date:  1996-02-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8211617     Medline TA:  Prog Neuropsychopharmacol Biol Psychiatry     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  903-13     Citation Subset:  IM    
Affiliation:
INSERM U38, Faculté de médecine, Marseille, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Erythrocytes / metabolism*
Female
Humans
Kinetics
Male
Middle Aged
Radioligand Assay
Schizophrenia / diagnosis*,  metabolism*
Tryptophan / metabolism*
Chemical
Reg. No./Substance:
73-22-3/Tryptophan

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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