Brain metabolism in substance-induced psychosis and schizophrenia: a preliminary PET study.

INTRODUCTION: The relation between schizophrenia and cannabis abuse has been widely discussed from etiopathogenetic, psychopathological and neurometabolic points of view. Relatively little has been written about the differences between schizophrenia with co-occurrent cannabis abuse and substance-induced psychotic disorder (SIPD). Given these premises, our study aims to investigate the psychopathological and neurometabolic features of these clinical entities. METHODS: We enrolled patients experiencing an acute psychotic episode, affected either by schizophrenia with or without cannabis abuse (SCZ +/- CA; n = 5 and n = 5, respectively) with recent onset (<5 years of illness) or by SIPD (n = 6), as diagnosed by the Structured Clinical Interview for DSM-IV Axis I. Patients affected by SIPD were all cannabis abusers. All patients were assessed with the PANSS (Positive and Negative Scale for Schizophrenia), urinary toxicological tests and brain 18-FDG-PET scanning in resting condition. Statistical analysis (ANOVA) was performed with Statistical Parametric Mapping SPM8 and Scenium software. RESULTS: Bilateral hypermetabolism in the posterior cingulum and the precuneus (p < 0.001) was observed in SIPD patients compared to patients with schizophrenia, with or without cannabis abuse. CONCLUSIONS: Our preliminary PET findings suggest that substance abuse may cause increased brain metabolism in patients with induced psychosis but not in those with schizophrenia. These differences in brain metabolism were found in the posterior cingulum and precuneus, which are two core regions of the default mode network in humans.

Number of episodes and duration of illness associated with hypertension and 10-year cardiovascular risk in patients with bipolar disorder type I.

Severe Mental Illnesses, including bipolar disorder (BD) and schizophrenia (SCZ), are burdened with an increased mortality and a significantly reduced life expectancy than general population, and cardiovascular diseases (CVD) are considered the most contributing conditions. The aim of the present study is to evaluate 10-year CV risk and the associated clinical characteristics in patients with SCZ, BD type I and II. Patients were consecutively recruited from two Italian psychiatric acute units. Single CV risk factors were assessed, and 10-year CV risk calculated by means of the CUORE Project 10-year CV risk algorithm, based on the combination of the following risk factors: age, systolic blood pressure, total and high-density lipoprotein cholesterol, diabetes, smoking habit, and hypertensive treatment. Three hundred patients were included. Patients with BD type I showed a higher prevalence of hypertension and 10-year CV risk score compared to the other groups. In subjects with BD type I, we found a significant correlation between duration of illness and number of mood episodes and both hypertension and 10-year CV risk score. Several preventive strategies should be provided to these vulnerable populations, such as correcting unhealthy lifestyles, prescribing medications at lower CV and metabolic risk, enhancing access to care.

The impact of COVID-19 on the psychiatric emergency departments of two Italian hospitals in Milan.

During the first wave of the SARS-CoV-2 contagion in Italy, mental health care services continuity has been granted to the general population. Emergent and urgent conditions, however, are managed in collaboration with Emergency Departments (EDs). This collaboration may have suffered from the overload of the EDs due to the high number of SARS-CoV-2 positive patients. In this perspective, we analysed the possible impact of COVID-19 on the EDs accesses of psychiatric patients in two of the main hospitals of Milan, the "Luigi Sacco" Hospital and the "Fatebenefratelli" Hospital, comparing their admissions between the periods of March, April and May 2019 and 2020. We found a significant reduction in the number of evaluated patients in 2020 in both EDs. Emergency Medical Services (EMSs) brought a significant lower number of patients to the ED of Sacco Hospital during 2020, while this number increased for the ED of Fatebenefratelli Hospital, confirming the hypothesis that the overload of the Sacco Hospital ED significantly influenced the possibility to receive a psychiatric evaluation there. Moreover, we found a significant difference between diagnosis at discharge of the different samples.

How Did COVID-19 Affect Suicidality? Data from a Multicentric Study in Lombardy.

The aim of the study was to describe the characteristics of subjects accessing the emergency rooms for suicidal behavior during the first epidemic wave of COVID-19 in three Emergency Departments (EDs) in Lombardy (Italy). A retrospective chart review was conducted for the period 8 March-3 June 2020, and during the same time frame in 2019. For all subjects accessing for suicidality, socio-demographic and clinical data were collected and compared between the two years. The proportion of subjects accessing for suicidality was significantly higher in 2020 than in 2019 (13.0 vs. 17.2%, p = 0.03). No differences between the two years were found for sex, triage priority level, history of substance abuse, factor triggering suicidality and discharge diagnosis. During 2020 a greater proportion of subjects did not show any mental disorders and were psychotropic drug-free. Women were more likely than men to receive inpatient psychiatric treatment, while men were more likely to be discharged with a diagnosis of acute alcohol/drug intoxication. Our study provides hints for managing suicidal behaviors during the still ongoing emergency and may be primary ground for further studies on suicidality in the course of or after massive infectious outbreaks.

Emergency Psychiatric Consultations During and After the COVID-19 Lockdown in Italy. A Multicentre Study.

Aims: The aim was to analyse the psychiatric consultations in nine Italian hospital emergency departments, by comparing the lockdown and post-lockdown periods of 2020 with the equivalent periods of 2019. Methods: Characteristics of psychiatric consultations, patients, and drug prescriptions were analyzed. Joinpoint models were used to identify changes in the weekly trend of consultations. Results: A 37.5% decrease in the number of consultations was seen during the lockdown period and 17.9% after the lockdown. The number of individual patients seen decreased by 34.9% during the lockdown and 11.2% after the lockdown. A significant change in the number of consultations from week 11 to week 18 occurred, followed by a gradual increase. There was a higher percentage of patients with previous psychiatric hospitalizations during the lockdown period (61.1 vs. 56.3%) and a lower percentage after the lockdown (59.7 vs. 64.7%). During the lockdown there was a large increase in psychiatric consultations for substance use disorders, whereas more consultations for manic episodes occurred after the lockdown. A 3.4% decrease was observed in consultations for suicidal ideation and planning during the lockdown, followed by an upward rebound after the lockdown, along with an increase in consultations for suicide attempts. During lockdown antipsychotic and benzodiazepine prescriptions increased by 5.2 and 4.1%, respectively. After the lockdown, the number of compulsory hospitalizations was higher than in 2019. Conclusions: We observed a decrease of psychiatric consultations during and after the lockdown. There was an increase in consultations for manic episodes and suicidality after the lockdown. The focus of psychiatric services must remain high particularly in this latter period.

Cardiovascular risk in patients with severe mental illness in Italy.

BACKGROUND: Patients with severe mental illness (SMI), such as schizophrenia or bipolar disorders, are more frequently affected by metabolic syndrome and cardiovascular (CV) diseases than the general population, with a significant reduction in life expectancy. Beyond metabolic syndrome, quantifying the risk of CV morbidity in the long-term may help clinicians to put in place preventive strategies. In this study, we assessed 10-year CV risk in patients with SMI and healthy individuals using an algorithm validated on the Italian general population. METHODS: Patients aged 35-69 years diagnosed with SMI were consecutively recruited from psychiatric acute care units. Single CV risk factors were assessed, and 10-year CV risk calculated by means of the CUORE Project 10-year CV risk algorithm, based on the combination of the following risk factors: age, systolic blood pressure, total and high-density lipoprotein cholesterol, diabetes, smoking habit, and hypertensive treatment. Patients' data were compared with those from the general population. The 10-year CV risk was log-transformed, and multivariable linear regression was used to estimate mean ratios, adjusting for age, and education. RESULTS: Three hundred patients and 3,052 controls were included in the analysis. Among men, the 10-year CV risk score was very similar between patients with SMI and the general population (mean ratio [MR]: 1.02; 95%CI 0.77-1.37), whereas a 39% increase in 10-year CV risk was observed in women with SMI compared to the general population (MR: 1.39; 95%CI 1.16-1.66). CONCLUSIONS: In our study, women with SMI were consistently more at risk than the general population counterpart, even at younger age.

Hallucinatory disorder, an original clinical picture? Clinical and imaging data.

OBJECTIVE: The aim of this study was to verify the existence of areas of clinical and neurofunctional homogeneity in a group of patients with auditory verbal hallucinations (AVHs) as an isolated symptom, attributable to what we have called "Hallucinatory Disorder" (HD) in an attempt to propose a clinical picture that is distinct from Schizophrenia. METHOD: Nine patients clinically characterised by chronic AVHs were compared with nine schizophrenic patients using the Structured Clinical Interview for DSM-III-R, BPRS, PANSS, SAPS, SANS, HRS-A, HRS-D, CDSS, MMSE, CGI and PSYRATS. Both groups of patients and nine healthy subjects underwent EEG and SPECT examinations. RESULTS: Considering the psychopathological dimensions of Schizophrenia, in the HD patients clinical evaluations revealed a mono-dimensional clinical profile, whereas all these dimensions contributed to the clinical picture of the schizophrenic patients. The SPECT data showed that the schizophrenic patients had a reduced rCBF in some areas of the right frontal lobe, while the HD patients did not show any area of hypoperfusion. The SPECT hyperperfusion data showed an activation pattern in the HD patients that was characterised by the involvement of various cortical and subcortical cerebral areas, similar to those found in studies of inner speech and auditory verbal imagery. CONCLUSIONS: The two groups of patients present significant differences that seem capable of supporting the proposed hypothesis that HD may be an independent nosographical entity.

A case of severe psychosis induced by novel recreational drugs.

INTRODUCTION:  The use of novel recreational drugs is becoming of public interest, especially after recent international alerts about their cardiovascular and neurological toxicity. Additionally, little is known about the psychiatric consequences of the long-term use of these compounds. CASE PRESENTATION: We describe a case of severe psychotic episode likely induced by chronic use of a combination of new recreational drugs (methylenedioxypyrovalerone, mephedrone, butylone and alpha-pyrrolidinopentiophenone). The patient had no psychiatric history and showed poor response to conventional antipsychotic treatment (haloperidol). CONCLUSIONS: This case illustrates the potential negative effects of recreational drugs that cannot be limited to an acute psychotic episode but might determine a condition of prolonged paranoid psychosis. Although the use of these compounds is currently increasing, such molecules might often pass undetected in patients accessing the emergency room, leading to misdiagnosis (e.g. schizophrenic episode) and lack of appropriate treatment.

White matter metabolism differentiates schizophrenia and bipolar disorder: a preliminary PET study.

Fluorodeoxyglucose-F18 positron emission tomography studies (FDG-PET) have shown similar corticolimbic metabolic dysregulation in bipolar disorder and schizophrenia, with hypoactive prefrontal cortex coupled with hyperactive anterior limbic areas. However, it is not clear whether white matter metabolism connecting these regions is differently affected in the two disorders. Twenty-six patients with schizophrenia (mean age ± S.D.=30.23 ± 9.7 year-old; 19 males; mean weight ± S.D.=71 ± 3 kg) and 26 patients with bipolar disorder (mean age ± S.D.=48.73 ± 13 year-old; 18 males; mean weight ± S.D.=75 ± 15 kg) underwent an FDG-PET scan. Normalized datasets the two groups of patients were compared on a voxel-by-voxel basis using a two-sample t statistic test as implemented in SPM8, and adding age as covariate. Group differences were assessed applying a threshold of p<0.0005. White matter metabolic rates significantly differed between schizophrenia and bipolar disorder, whereas no differences were shown for cortical activity. This is the first FDG-PET, to our best knowledge, directly comparing subjects with schizophrenia to those with bipolar disorder. It reports decreased activity in the center of large fronto-temporal and cerebellar white matter tracts in patients with schizophrenia in respect to those with bipolar disorder. This feature may characterize and differentiate the regional brain metabolism of the two illnesses.

Substance-induced psychoses: a critical review of the literature.

Substances with psychotomimetic properties such as cocaine, amphetamines, hallucinogens and cannabis are widespread, and their use or abuse can provoke psychotic reactions resembling a primary psychotic disease. The recent escalating use of methamphetamine throughout the world and its association with psychotic symptoms in regular users has fuelled concerns. The use of cannabis and cocaine by young people has considerably increased over recent years, and age at first use has dramatically decreased. There is some evidence that cannabis is now on the market in a more potent form than in previous decades. Furthermore, a large number of studies have reported a link between adolescent cannabis use and the development of stable psychosis in early adulthood. The situation is further complicated by the high rates of concomitant substance use by subjects with a psychotic illness which, especially in young users with an early-phase psychotic disorder, can make diagnosis difficult. This paper reviews the literature concerning the properties of psychotogenic substances and the psychotic symptoms they can give rise to, and discusses the association between substance abuse and psychosis with particular emphasis on the differential diagnosis of a primary and substance-induced psychotic disorder. The findings of this review indicate that psychosis due to substance abuse is commonly observed in clinical practice. The propensity to develop psychosis seems to be a function of the severity of use and dependence. From a phenomenological point of view, it is possible to identify some elements that may help clinicians involved in differential diagnoses between primary and substance-induced psychoses. There remains a striking paucity of information on the outcomes, treatments, and best practices of substance-induced psychotic episodes.