Article (Scientific journals)
Abnormal response to metabolic stress in schizophrenia: marker of vulnerability or acquired sensitization?
Marcelis, Machteld; Cavalier, Etienne; Gielen, Jacques et al.
2004In Psychological Medicine, 34 (6), p. 1103-1111
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Abstract :
[en] Background. Previous work suggests that individuals with schizophrenia display an altered homovanillic acid (HVA) response to metabolic stress. The present study replicated and extended this paradigm, including individuals with elevated genetic risk for schizophrenia. Method. Patients with psychosis (n = 50), non-psychotic first-degree relatives of patients with psychosis (n = 5 1) and controls without psychosis (n = 50) underwent, in randomized order, double-blind administration of placebo and the glucose analogue 2-deoxy-D-glucose (2DG), which induces a mild, transient clinical state of glucoprivation. Plasma HVA and cortisol were assessed twice before the start of the 2DG/placebo infusion (baseline values), as well as four times post infusion. Data were analysed using multi-level random regression techniques. Results. During the stress condition, significant increases in plasma HVA and cortisol were found. The increase in plasma HVA level during the stress condition was significantly stronger in patients than in controls, whereas this was not the case in relatives v. controls. The increase in plasma cortisol during the stress condition was significantly less in patients than controls, but no significant difference in the increase of plasma cortisol during stress was found in the comparison between relatives and controls. Conclusions. Patients with psychosis, but not their non-psychotic first-degree relatives, show an altered neurobiological response to metabolic stress, suggesting that this dysregulation is not a genetically transmitted vulnerability, but an illness-related effect, possibly reflecting acquired sensitization of neuroendocrine systems by repeated environmental stressors or repeated stimulation with agonistic drugs.
Disciplines :
Treatment & clinical psychology
Author, co-author :
Marcelis, Machteld;  University of Maastricht > Department of Psychiatry and Neuropsychology
Cavalier, Etienne  ;  Centre Hospitalier Universitaire de Liège - CHU > Chimie médicale
Gielen, Jacques ;  Université de Liège - ULiège > Chimie médicale
Delespaul, Philippe;  University of Maastricht > Department of Psychiatry and Neuropsychology
Van Os, Jim;  University of Maastricht > Department of Psychiatry and Neuropsychology
Language :
English
Title :
Abnormal response to metabolic stress in schizophrenia: marker of vulnerability or acquired sensitization?
Publication date :
August 2004
Journal title :
Psychological Medicine
ISSN :
0033-2917
eISSN :
1469-8978
Publisher :
Cambridge Univ Press, New York, United States - New York
Volume :
34
Issue :
6
Pages :
1103-1111
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 January 2009

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