Publications by authors named "Daniele La Barbera"

Background: Multiple genetic and environmental risk factors play a role in the development of both schizophrenia-spectrum disorders and affective psychoses. How they act in combination is yet to be clarified.

Methods: We analyzed 573 first episode psychosis cases and 1005 controls, of European ancestry.

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Background: The association between cannabis and psychosis is established, but the role of underlying genetics is unclear. We used data from the EU-GEI case-control study and UK Biobank to examine the independent and combined effect of heavy cannabis use and schizophrenia polygenic risk score (PRS) on risk for psychosis.

Methods: Genome-wide association study summary statistics from the Psychiatric Genomics Consortium and the Genomic Psychiatry Cohort were used to calculate schizophrenia and cannabis use disorder (CUD) PRS for 1098 participants from the EU-GEI study and 143600 from the UK Biobank.

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We examined the feasibility of using the neofunctional deep breathing (NDB) technique to reduce the allostatic load following the Trier Social Stress Test (TSST). Forty-four healthy subjects were randomised into experimental and control groups. Following the TSST procedure, participants underwent either a single session of NDB or an attention control intervention.

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  • - The study investigates the link between urban living conditions (urbanicity) and schizotypy, a potential precursor to psychosis, suggesting this relationship varies significantly between North-western and Southern Europe.
  • - Researchers assessed 1080 individuals across 14 sites in both regions, measuring urbanicity through local population density and controlling for factors like age and childhood experiences.
  • - Findings reveal that higher population density is strongly associated with increased schizotypy in North-western Europe, while the effect is notably weaker in Southern Europe, indicating that urbanization’s impact on mental health is not uniform across different contexts.
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Childhood adversity is associated with various clinical dimensions in psychosis; however, how genetic vulnerability shapes the adversity-associated psychopathological signature is yet to be studied. We studied data of 583 First Episode Psychosis (FEP) cases from the EU-GEI FEP case-control study, including Polygenic risk scores for major depressive disorder (MDD-PRS), bipolar disorder (BD-PRS) and schizophrenia (SZ-PRS); childhood adversity measured with the total score of the Childhood Trauma Questionnaire (CTQ); and positive, negative, depressive and manic psychopathological domains from a factor model of transdiagnostic dimensions. Genes and environment interactions were explored as a departure from a multiplicative effect of PRSs and total CTQ on each dimension.

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  • Several studies have explored the neural correlates of trans individuals, revealing inconsistent findings. This particular study focused on comparing functional connectivity, cognitive profiles, and hormone levels among trans men with gender dysphoria, cisgender men, and cisgender women.
  • A total of 42 participants underwent resting state fMRI and hormonal analysis, revealing that trans men showed reduced functional connectivity in various brain regions and performed worse in certain cognitive tasks compared to cisgender men, but similarly to cisgender women.
  • The study found significant correlations between testosterone and specific brain areas in trans men, indicating potential neural differences that challenge binary gender models and highlight the unique neural characteristics present in those with gender dysphoria.
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  • The study investigates how current cannabis use and high-potency cannabis affect DNA methylation patterns in individuals experiencing first-episode psychosis (FEP), comparing them to non-users.
  • Researchers analyzed blood samples from 682 participants, identifying a significant CpG site associated with cannabis use that could influence mental health through epigenetic changes.
  • Findings suggest cannabis use affects genes related to immune and mitochondrial functions, with implications for understanding how cannabis may impact mental health, especially in those with psychosis.
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  • The study investigates the relationship between setting-level deprivation and cannabis use in affecting the incidence of first-episode psychotic disorders (FEP).
  • Researchers used data from 14 settings in the EU-GEI study to analyze how factors like owner-occupancy and daily cannabis use correlate with FEP incidence among individuals aged 18-64.
  • Findings revealed that lower owner-occupancy rates were linked to higher rates of psychosis, while daily cannabis use was specifically associated with affective psychoses, suggesting environmental factors play a significant role in psychotic disorder incidence.
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Background: Childhood adversity and cannabis use are considered independent risk factors for psychosis, but whether different patterns of cannabis use may be acting as mediator between adversity and psychotic disorders has not yet been explored. The aim of this study is to examine whether cannabis use mediates the relationship between childhood adversity and psychosis.

Methods: Data were utilised on 881 first-episode psychosis patients and 1231 controls from the European network of national schizophrenia networks studying Gene-Environment Interactions (EU-GEI) study.

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Background: Specific screening for anxiety and depression in pregnant women is important to identify those at risk and to provide timely intervention. The aims of the study were: 1) to compare the risk of anxiety and depression in four groups of pregnant women belonging to four types of healthcare centers distinguished by the level of risk: at low-risk; at high-risk for an obstetric reason; at high-risk for fetal anomalies; at high-risk for psychiatric conditions and 2) to identify the response that the National Health Service offers to women positively screened for anxiety and depression.

Methods: A cross-sectional study was conducted on 2801 pregnant women, cared for by National Health Service, divided into four groups: 1) low-risk pregnancy (N.

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  • Illegal stimulant use is linked to a higher risk of first-episode psychosis (FEP), with 14.5% of patients experiencing FEP reporting lifetime stimulant use compared to 10.8% of controls.
  • The study analyzed 1,130 FEP patients and 1,497 controls across Europe and Brazil, using logistic regression to determine the relationship between stimulant use and FEP risk.
  • Findings suggest that eliminating stimulant use could potentially prevent 3.35% to 7.61% of FEP cases, indicating a significant public health concern that varies by country.
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This study investigated if the association between childhood maltreatment and cognition among psychosis patients and community controls was partially accounted for by genetic liability for psychosis. Patients with first-episode psychosis (N = 755) and unaffected controls (N = 1219) from the EU-GEI study were assessed for childhood maltreatment, intelligence quotient (IQ), family history of psychosis (FH), and polygenic risk score for schizophrenia (SZ-PRS). Controlling for FH and SZ-PRS did not attenuate the association between childhood maltreatment and IQ in cases or controls.

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Background: A history of childhood adversity is associated with psychotic disorder, with an increase in risk according to the number of exposures. However, it is not known why only some exposed individuals go on to develop psychosis. One possibility is pre-existing polygenic vulnerability.

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Background: While cannabis use is a well-established risk factor for psychosis, little is known about any association between reasons for first using cannabis (RFUC) and later patterns of use and risk of psychosis.

Methods: We used data from 11 sites of the multicentre European Gene-Environment Interaction (EU-GEI) case-control study. 558 first-episode psychosis patients (FEPp) and 567 population controls who had used cannabis and reported their RFUC.

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The COVID-19 pandemic has had a significant impact on the quality of life (QoL), daily lifestyle, and mental health of people suffering from a mental disorder. This study aimed to investigate the effects of the prolongation of the COVID-19 emergency on QoL and lifestyles in a sample of 100 outpatients at the Psychiatry Unit in Palermo University Hospital, Italy. QoL was measured through the 12-item Short Form Survey and the COV19-Impact on Quality of Life.

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  • * Researchers found that individuals from migrant backgrounds, particularly those from non-Western countries, experienced higher rates of CM and that this exposure was linked to greater incidence of FEP.
  • * The findings suggest that although migrant status weakens the direct link between CM and FEP, these groups still face a significant risk and should be targeted in policies aimed at reducing child maltreatment.
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Objectives: Treatment persistence refers to the act of continuing a treatment as prescribed and reflects the patient's or doctor's judgment about efficacy, tolerability, and acceptability. In patients with schizophrenia, antipsychotic persistence is often poor, because of issues such as lack or loss of efficacy, side effects, and poor adherence, which is often related to the degree to which patients find the medication and overall intervention to be helpful, tolerable, fair, reasonable, appropriate, and consistent with expectations of treatment. Despite the poor antipsychotic persistence that has been reported to date in patients with schizophrenia, we previously observed a relatively high (86%) 6 months persistence with aripiprazole once-monthly (AOM) in a group of patients with schizophrenia, treated in the real world Italian clinical practice.

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  • A study examined 802 first-episode psychosis (FEP) patients and identified four distinct clusters based on their premorbid social and academic functioning and current IQ levels.* -
  • These clusters varied in their genetic risk scores for psychotic disorders and showed differing patterns of cannabis use, with one cluster having a notable connection to high-potency cannabis.* -
  • Most FEP patients did not show marked premorbid deterioration; however, the deteriorating group indicated a relationship between their decline in functioning and frequent use of high-potency cannabis.*
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In the present study we analyzed how attitudes toward touch have changed during the COVID-19 pandemic in an Italian sample, through two different studies: in the first we contacted participants of the Italian validation study of the Touch Avoidance Questionnaire, asking them to take part in a follow-up study ( = 31, 64.5% women, age 42.58 ± 15.

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Background And Hypothesis: Facial Emotion Recognition is a key domain of social cognition associated with psychotic disorders as a candidate intermediate phenotype. In this study, we set out to investigate global and specific facial emotion recognition deficits in first-episode psychosis, and whether polygenic liability to psychotic disorders is associated with facial emotion recognition.

Study Design: 828 First Episode Psychosis (FEP) patients and 1308 population-based controls completed assessments of the Degraded Facial Affect Recognition Task (DFAR) and a subsample of 524 FEP and 899 controls provided blood or saliva samples from which we extracted DNA, performed genotyping and computed polygenic risk scores for schizophrenia (SZ), bipolar disorder (BD), and major depressive disorder (MD).

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Background And Hypothesis: Evidence suggests that childhood maltreatment (ie, childhood abuse and childhood neglect) affects educational attainment and cognition. However, the association between childhood maltreatment and Intelligence Quotient (IQ) seems stronger among controls compared to people with psychosis. We hypothesised that: the association between childhood maltreatment and poor cognition would be stronger among community controls than among people with first-episode of psychosis (FEP); compared to abuse, neglect would show stronger associations with educational attainment and cognition; the association between childhood maltreatment and IQ would be partially accounted for by other risk factors; and the association between childhood maltreatment, educational attainment, and IQ would be stronger among patients with affective psychoses compared to those with nonaffective psychoses.

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Background: Schizophrenia (SZ), bipolar disorder (BD) and depression (D) run in families. This susceptibility is partly due to hundreds or thousands of common genetic variants, each conferring a fractional risk. The cumulative effects of the associated variants can be summarised as a polygenic risk score (PRS).

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Objective: Stereotyped beliefs about schizophrenia are well-established in the society and relatively common among healthcare professionals and students. The aim of this study was to investigate the opinions about the causes, treatment, and outcome of schizophrenia among healthcare students.

Method: Undergraduate nursing and psychology students completed selected items of the Opinion on Mental Illness Questionnaire after reading a clinical vignette of undiagnosed schizophrenia.

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Objective: Affecting more than 264 million people, depression is a systemic and multifactorial disorder that represents one of the leading causes of illness and disability worldwide. Several studies showed an inflammatory response in depressed patients, including the involvement of both chronic low-grade inflammatory response and activation of cell-mediated immunity. The present study aimed to verify the efficacy of a structured functional therapy program for patients with depressed mood, and to determine whether this program can significantly reduce levels of C-reactive protein.

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  • * It found that better premorbid social functioning was linked to fewer negative and depressive symptoms, while a lower IQ was associated with more symptoms overall.
  • * Specific cognitive skills, like perceptual reasoning and processing speed, correlated with the presence of manic and negative symptoms, indicating they may reflect different neurodevelopmental issues in psychosis.
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