Schizoaffective Disorder, Schizophrenia, Schizophreniform Disorder
Conditions
Keywords
dopamine, first episode, reward, cognition, MRI, fMRI, PPI, P300, P50 gating, endophenotypes
Brief summary
The investigators want to relate disturbances in first-episode schizophrenic patients in (dopaminergic) D2 receptors, brain structure, brain function, and information processing to each other and to psychopathology. Additionally, the investigators want to examine the influence of D2 receptor blockade on these disturbances. The investigators expect disturbances in the dopaminergic system at baseline to correlate with specific structural and functional changes and with disruption in information processing as measured with psychophysiological and neurocognitive methods - and investigators expect D2 receptor blockade to reverse some of the functional and cognitive impairments. The investigators do not expect any effect of treatment on brain structure.
Detailed description
The study is designed as a 4 week case-control follow-up study of 90 FE pt. with SCZ and 90 controls matched with regard to age, gender, and parental socio-economic status. All subjects will be examined with a diagnostic interview (SCAN, Schedule for Clinical Assessment in Neuropsychiatry), medical and family history, and physical examination before inclusion. At baseline subjects will be examined with single photon emission computed tomography (SPECT), MRI, fMRI, psychophysiology, neurocognition. In addition, they will be screened for drugs, genetic testing, and ECG. Patients will further be examined with clinical validated rating scales to measure psychopathology, subjective well-being, and side-effects. After a period of 4 weeks all assessments are repeated. During that period patients will be treated with amisulpride, while healthy controls will receive no treatment at all. Efficacy of antipsychotic treatment will be evaluated after this initial period of 4 weeks. All subjects will be re-assessed in the same test battery as mentioned above, except for SPECT and fMRI, after a period of 6, 12, and 24 months.
Interventions
DRUGAmisulpride
4-week open label amisulpride treatment
Sponsors
Glostrup University Hospital, Copenhagen
Rigshospitalet, Denmark
Institute of Psychiatry, London
UMC Utrecht
Copenhagen Hospital Corporation
Birte Glenthoj
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Schizophrenia, schizophreniform or schizoaffective disorder (DSM-IV) * Age 18-40 years * Written informed consent.
Exclusion criteria
* A time interval between the onset of positive symptoms (hallucinations and/or delusions) and study entry exceeding two years. * Prior use of antipsychotic medication longer than an episode of two weeks in the previous year and/or 6 weeks lifetime. * Intolerance to one of the drugs in this study. Patients who are coercively treated at a psychiatric ward (based on a judicial ruling) * Patients who are represented by a legal ward or under legal custody * The presence of one or more of the contraindications against any of the study drugs as mentioned in the SPC texts * Pregnancy, as determined through a pregnancy test, or lactation
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Relationship between specific neuropsychiatric measures and global improvement on PANSS scores | 4 weeks of medical treatment | Changes in neuropsychiatric measures like (e.g. PPI, P50-suppression, neurocogtion etc.) will be evaluated and related to the primary outcome measure of the main OPTiMiSE study, the PANSS score change from baseline to follow-up. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Effect of antipsychotic medication on P50-suppression | Baseline, 4 weeks, 6,12,24 months | Time/dose improvement on P50 suppression after antipsychotic treatment |
| Effect of antipsychotic medication on the human reward system | Baseline and 4 weeks follow up | Disturbances in the human reward system in antipsychotic naive patients with schizophrenia will be evaulated using a reward related BOLD fMRI paradigme. |
| Effect of antipsychotic medication on the D2 binding potential (SPECT) in antipsychotic naive patients with schizophrenia. | Baseline, 4 weeks | D2 receptor binding will be evaluated at baseline and after 4 weeks of treatment. This will be related to measures of the human reward system. |
| Change in processing speed over time after antipsychotic treatment. | Baseline, 4 weeks, 6,12,24 months | Processing speed is expected to improve. |
| Change in levels of brain perfusion from baseline to follow-up. | Baseline, 4 weeks treatment | Brain perfusion levels will be measured in brain areas related to the human reward systems. |
| Change in hippocampal and basal ganglia volume from baseline to follow-up. | 4 weeks, 6, 12 and 24 months, | Hippocampal volume decrease and basal ganglia volume increase is expected longitudinal outcomes. |
Countries
Denmark
Outcome results
None listed