Marc Burlon - Academia.edu (original) (raw)
Papers by Marc Burlon
Pharmacopsychiatry, Jun 1, 2006
Negative and cognitive symptoms of schizophrenia are associated with a hypodopaminergic state in ... more Negative and cognitive symptoms of schizophrenia are associated with a hypodopaminergic state in the frontal cortex and do not respond to neuroleptics equally well as positive symptoms. Therefore pharmacological strategies, which increase dopamine metabolism in the mesocortical pathways, may prove beneficial to ameliorate these symptoms. We report on a case of a patient with paranoid schizophrenia, who still presented negative and depressive symptoms during treatment with amisulpride for more than 6 weeks. We prescribed pergolide (a mixed D1/D2 agonist) as adjuvant therapy to treat these symptoms. The patient showed an improvement of global psychopathology, decrease of negative and depressive symptoms, while no changes in positive symptoms nor EPS were present. For this patient, the adjuvant therapy of pergolide to amisulpride constituted a valid pharmacological approach to treat negative and depressive symptoms of schizophrenia, without increasing positive symptoms.
Cognitive Therapy and Research, 2007
It has been suggested that an exaggerated self-serving bias may underlie the formation of paranoi... more It has been suggested that an exaggerated self-serving bias may underlie the formation of paranoia. One goal of the present study was to explore whether an abnormality of attributional style is confined to patients with persecutory delusions or extends to currently non-deluded patients. A second goal was to test whether paranoid patients show an external-personal rather than an external-situational attributional style for blame. An attributional styles questionnaire was administered to psychiatric patients diagnosed with schizophrenia (n = 35), depression (n = 18), and anxiety disorders (n = 34), as well as a healthy control group (n = 28). For each event (positive or negative outcome) participants were asked to write down what may have led to this event, and then to endorse the degree to which this event was caused by others/circumstances or themselves. Assessment of the Likert scale ratings demonstrated that while healthy subjects displayed a significant self-serving bias, currently paranoid and non-paranoid schizophrenia patients performed intermediately between healthy participants and depressed patients. Analysis of coded verbal statements indicated that irrespective of event type (positive, negative) patients with persecutory delusions had an even-handed attribution bias, whereas all other groups predominantly regarded themselves as causal. The latter finding indicates that acute paranoia may be associated with a decreased locus of internal control, which may promote the occurrence of certain paranoid beliefs (e.g., feelings of alien control and passivity experiences, respectively).
Fortschritte Der Neurologie Psychiatrie, 2010
Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime ... more Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime comorbid substance use disorder (SUD). In first-episode psychosis this prevalence is even higher and varies between 20 % and 75 % with cannabis being the most widely used illicit drug. These difficult to treat patients usually have a worse prognosis as compared with non-substance abusing schizophrenic patients. Despite multiple theories proposed such as the self medication hypothesis, common or bidirectional factor models or genetic vulnerability, there is no consensus on the aetiology of increased rates of substance use in people with psychosis which is important to treat these patients. The dually diagnosed population is a heterogeneous group and it is likely that different models may explain comorbidity in different subgroups. The present review part one gives an overview on prevalence and explanation models for dual diagnosis psychosis and substance use with focus in adolescent and young adult populations, the second part reviews the clinical course for both disorders and current psychosocial treatment options.
Fortschritte Der Neurologie Psychiatrie, 2010
Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime ... more Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime comorbid substance use disorder (SUD). In first-episode psychosis this prevalence is even higher and varies between 20 % and 75 % with cannabis being the most widely used illicit drug. These difficult to treat patients usually have a worse prognosis as compared with non-substance abusing schizophrenic patients. Despite multiple theories proposed such as the self medication hypothesis, common or bidirectional factor models or genetic vulnerability, there is no consensus on the aetiology of increased rates of substance use in people with psychosis which is important to treat these patients. The dually diagnosed population is a heterogeneous group and it is likely that different models may explain comorbidity in different subgroups. The present review part one gives an overview on prevalence and explanation models for dual diagnosis psychosis and substance use with focus in adolescent and young adult populations, the second part reviews the clinical course for both disorders and current psychosocial treatment options.
The Journal of Clinical Psychiatry, 2010
The ACCESS trial examined the 12-month effectiveness of continuous therapeutic assertive communit... more The ACCESS trial examined the 12-month effectiveness of continuous therapeutic assertive community treatment (ACT) as part of integrated care compared to standard care in a catchment area comparison design in patients with schizophrenia spectrum disorders treated with quetiapine immediate release. Two catchment areas in Hamburg, Germany, with similar population size and health care structures were assigned to offer 12-month ACT as part of integrated care (n = 64) or standard care (n = 56) to 120 patients with first- or multiple-episode schizophrenia spectrum disorders (Structured Clinical Interview for DSM-IV Axis I Disorders criteria); multiple-episode patients were restricted to those with a history of relapse due to medication nonadherence. The primary outcome was time to service disengagement. Secondary outcomes comprised medication nonadherence, improvements of symptoms, functioning, quality of life, satisfaction with care from patients' and relatives' perspectives, and service use data. The study was conducted from April 2005 to December 2008. 17 of 120 patients (14.2%) disengaged with service, 4 patients (6.3%) in the ACT and 13 patients (23.2%) in the standard care group. The mean Kaplan-Meier estimated time in service was 50.7 weeks in the ACT group (95% CI, 49.1-52.0) and 44.1 weeks in the standard care group (95% CI, 40.1-48.1). This difference was statistically significant (P = .0035). Mixed models repeated measures indicated larger improvements for ACT compared to standard care regarding symptoms (P < . 01), illness severity (P < . 001), global functioning (P < . 05), quality of life (P < . 05), and client satisfaction as perceived by patients and family (both P < . 05). Logistic regression analyses revealed that ACT was associated with a higher likelihood of being employed/occupied (P = .001), of living independently (P = .007), and of being adherent with medication (P < . 001) and a lower likelihood of persistent substance misuse (P = .027). Compared to standard care, intensive therapeutic ACT as part of integrated care could improve 1-year outcome. Future studies need to address in which settings these improvements can be sustained. clinicaltrials.gov Identifier: NCT01081418.
Pharmacopsychiatry, Jun 1, 2006
Negative and cognitive symptoms of schizophrenia are associated with a hypodopaminergic state in ... more Negative and cognitive symptoms of schizophrenia are associated with a hypodopaminergic state in the frontal cortex and do not respond to neuroleptics equally well as positive symptoms. Therefore pharmacological strategies, which increase dopamine metabolism in the mesocortical pathways, may prove beneficial to ameliorate these symptoms. We report on a case of a patient with paranoid schizophrenia, who still presented negative and depressive symptoms during treatment with amisulpride for more than 6 weeks. We prescribed pergolide (a mixed D1/D2 agonist) as adjuvant therapy to treat these symptoms. The patient showed an improvement of global psychopathology, decrease of negative and depressive symptoms, while no changes in positive symptoms nor EPS were present. For this patient, the adjuvant therapy of pergolide to amisulpride constituted a valid pharmacological approach to treat negative and depressive symptoms of schizophrenia, without increasing positive symptoms.
Cognitive Therapy and Research, 2007
It has been suggested that an exaggerated self-serving bias may underlie the formation of paranoi... more It has been suggested that an exaggerated self-serving bias may underlie the formation of paranoia. One goal of the present study was to explore whether an abnormality of attributional style is confined to patients with persecutory delusions or extends to currently non-deluded patients. A second goal was to test whether paranoid patients show an external-personal rather than an external-situational attributional style for blame. An attributional styles questionnaire was administered to psychiatric patients diagnosed with schizophrenia (n = 35), depression (n = 18), and anxiety disorders (n = 34), as well as a healthy control group (n = 28). For each event (positive or negative outcome) participants were asked to write down what may have led to this event, and then to endorse the degree to which this event was caused by others/circumstances or themselves. Assessment of the Likert scale ratings demonstrated that while healthy subjects displayed a significant self-serving bias, currently paranoid and non-paranoid schizophrenia patients performed intermediately between healthy participants and depressed patients. Analysis of coded verbal statements indicated that irrespective of event type (positive, negative) patients with persecutory delusions had an even-handed attribution bias, whereas all other groups predominantly regarded themselves as causal. The latter finding indicates that acute paranoia may be associated with a decreased locus of internal control, which may promote the occurrence of certain paranoid beliefs (e.g., feelings of alien control and passivity experiences, respectively).
Fortschritte Der Neurologie Psychiatrie, 2010
Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime ... more Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime comorbid substance use disorder (SUD). In first-episode psychosis this prevalence is even higher and varies between 20 % and 75 % with cannabis being the most widely used illicit drug. These difficult to treat patients usually have a worse prognosis as compared with non-substance abusing schizophrenic patients. Despite multiple theories proposed such as the self medication hypothesis, common or bidirectional factor models or genetic vulnerability, there is no consensus on the aetiology of increased rates of substance use in people with psychosis which is important to treat these patients. The dually diagnosed population is a heterogeneous group and it is likely that different models may explain comorbidity in different subgroups. The present review part one gives an overview on prevalence and explanation models for dual diagnosis psychosis and substance use with focus in adolescent and young adult populations, the second part reviews the clinical course for both disorders and current psychosocial treatment options.
Fortschritte Der Neurologie Psychiatrie, 2010
Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime ... more Epidemiological studies suggest that 20 % to 50 % of patients with schizophrenia have a lifetime comorbid substance use disorder (SUD). In first-episode psychosis this prevalence is even higher and varies between 20 % and 75 % with cannabis being the most widely used illicit drug. These difficult to treat patients usually have a worse prognosis as compared with non-substance abusing schizophrenic patients. Despite multiple theories proposed such as the self medication hypothesis, common or bidirectional factor models or genetic vulnerability, there is no consensus on the aetiology of increased rates of substance use in people with psychosis which is important to treat these patients. The dually diagnosed population is a heterogeneous group and it is likely that different models may explain comorbidity in different subgroups. The present review part one gives an overview on prevalence and explanation models for dual diagnosis psychosis and substance use with focus in adolescent and young adult populations, the second part reviews the clinical course for both disorders and current psychosocial treatment options.
The Journal of Clinical Psychiatry, 2010
The ACCESS trial examined the 12-month effectiveness of continuous therapeutic assertive communit... more The ACCESS trial examined the 12-month effectiveness of continuous therapeutic assertive community treatment (ACT) as part of integrated care compared to standard care in a catchment area comparison design in patients with schizophrenia spectrum disorders treated with quetiapine immediate release. Two catchment areas in Hamburg, Germany, with similar population size and health care structures were assigned to offer 12-month ACT as part of integrated care (n = 64) or standard care (n = 56) to 120 patients with first- or multiple-episode schizophrenia spectrum disorders (Structured Clinical Interview for DSM-IV Axis I Disorders criteria); multiple-episode patients were restricted to those with a history of relapse due to medication nonadherence. The primary outcome was time to service disengagement. Secondary outcomes comprised medication nonadherence, improvements of symptoms, functioning, quality of life, satisfaction with care from patients' and relatives' perspectives, and service use data. The study was conducted from April 2005 to December 2008. 17 of 120 patients (14.2%) disengaged with service, 4 patients (6.3%) in the ACT and 13 patients (23.2%) in the standard care group. The mean Kaplan-Meier estimated time in service was 50.7 weeks in the ACT group (95% CI, 49.1-52.0) and 44.1 weeks in the standard care group (95% CI, 40.1-48.1). This difference was statistically significant (P = .0035). Mixed models repeated measures indicated larger improvements for ACT compared to standard care regarding symptoms (P < . 01), illness severity (P < . 001), global functioning (P < . 05), quality of life (P < . 05), and client satisfaction as perceived by patients and family (both P < . 05). Logistic regression analyses revealed that ACT was associated with a higher likelihood of being employed/occupied (P = .001), of living independently (P = .007), and of being adherent with medication (P < . 001) and a lower likelihood of persistent substance misuse (P = .027). Compared to standard care, intensive therapeutic ACT as part of integrated care could improve 1-year outcome. Future studies need to address in which settings these improvements can be sustained. clinicaltrials.gov Identifier: NCT01081418.