Predictors of transition to schizophrenia and other long-lasting non-affective psychoses in first-episode patients with acute and transient psychotic disorders: A validation study

Background and objectives Almost half of the individuals with a first-episode of psychosis who initially meet criteria for acute and transient psychotic disorder (ATPD) will have had a diagnostic revision during their follow-up, mostly toward schizophrenia. This study aimed to determine the proportion of diagnostic transitions to schizophrenia and other long-lasting non-affective psychoses in patients with first-episode ATPD, and to examine the validity of the existing predictors for diagnostic shift in this population. Methods We designed a prospective two-year follow-up study for subjects with first-episode ATPD. A multivariate logistic regression analysis was performed to identify independent variables associated with diagnostic transition to persistent non-affective psychoses. This prediction model was built by selecting variables on the basis of clinical knowledge. Results Sixty-eight patients with a first-episode ATPD completed the study and a diagnostic revision was necessary in 30 subjects at the end of follow-up, of whom 46.7% transited to long-lasting non-affective psychotic disorders. Poor premorbid adjustment and the presence of schizophreniform symptoms at onset of psychosis were the only variables independently significantly associated with diagnostic transition to persistent non-affective psychoses. Conclusion Our findings would enable early identification of those inidividuals with ATPD at most risk for developing long-lasting non-affective psychotic disorders, and who therefore should be targeted for intensive preventive interventions. (AU)

Effects of antipsychotics on amino acid levels in patients with first-episode schizophrenia: A prospective study

Background and objectives Alterations in the molecular mechanisms of specific amino acids (AAs) may be implicated in the pathophysiology of schizophrenia (SZ). However, little is known about antipsychotic drugs influence on levels of AAs. This study aimed to further explore antipsychotics' effects on AAs and serum lipid levels in first-episode SZ. Methods Eighty subjects with the International Classification of Diseases, Tenth Edition (ICD-10) criteria-defined SZ were enrolled. The levels of 31 AAs were measured in plasma samples using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Results Ten AAs (i.e., citrulline, sarcosine, tyrosine, leucine, proline, hydroxyproline, kynurenine, tryptophan, valine and isoleucine) were observed to be higher and three AAs (i.e., GABA, aminobutyric acid and asparaginic acid) were lower in 80 patients with first-episode SZ after various antipsychotics treatment. In addition, there were 1 out of 31 AAs altered after olanzapine treatment and there were only 2 out of 31 AAs altered after risperidone treatment. Furthermore, serum triglyceride (TG) was markedly upregulated after olanzapine treatment, while Apolipoprotein A1 (ApoA1) was generally upregulated after risperidone treatment in patients with first-episode SZ. Conclusions Taken together, antipsychotic treatment can affect the plasma levels of AAs in patients with first-episode SZ, and olanzapine and risperidone have differential effects on the levels of AAs. (AU)

The efficacy of social skills training (SST) and social cognition and interaction training (SCIT) for negative symptoms: A meta-analysis

Background and objectives The efficacy of antipsychotic drugs in improving negative symptoms of schizophrenia remains controversial. Psychological interventions, such as Social Skills Training (SST) and Social Cognition and Interaction Training (SCIT), have been developed and applied in clinical practice. The current meta-analysis was therefore conducted to evaluate the efficacy of controlled clinical trials using SST and SCIT on treating negative symptoms. Methods Systematical searches were carried out on PubMed, Web of Science, and PsycINFO databases. The standardized mean difference (SMD) with 95% confidence intervals (CI) was calculated to assess the effect size of SST/SCIT on negative symptoms. Subgroup and meta-regression analyses were conducted to explore sources of heterogeneity and identify potential factors that may influence their efficacy. Results A total of 23 studies including 1441 individuals with schizophrenia were included. The SST group included 8 studies with 635 individuals, and the SCIT group included 15 studies with 806 individuals. The effect size for the efficacy of SST on negative symptoms was -0.44 (95% CI: -0.60 to -0.28; p < 0.01), while SCIT was -0.16 (95% CI: -0.30 to -0.02; p < 0.01). Conclusions Our findings suggest that while both SST and SCIT can alleviate negative symptoms, the former appears to be more effective. Our results provide evidence-based guidance for the application of these interventions in both hospitalized and community individuals and can help inform the treatment and intervention of individuals with schizophrenia. (AU)

A Network Model of Health-Related Changes after a Lifestyle-Enhancing Treatment in Patients with Severe Mental Illness: the MULTI Study VI / Un modelo de red de cambios relacionados con la salud después de un tratamiento para mejorar el estilo de vida en pacientes con enfermedades mentales graves: el estudio MULTI VI

Background/Objective: The effects of lifestyle interventions on physical and mental health in people with severe mental illness (SMI) are promising, but its underlying mechanisms remain unsolved. This study aims to examine changes in health-related outcomes after a lifestyle intervention, distinguishing between direct and indirect effects. Method: We applied network intervention analysis on data from the 18-month cohort Multidisciplinary Lifestyle enhancing Treatment for Inpatients with SMI (MULTI) study in 106 subjects (62% male, mean age=54.7 (SD=10.8)) that evaluated changes in actigraphy-measured physical activity, metabolic health, psychopathology, psychosocial functioning, quality of life and medication use after MULTI (n=65) compared to treatment as usual (n=41). Results: MULTI is directly connected to decreased negative symptoms and psychotropic medication dosage, and improved physical activity and psychosocial functioning, suggesting a unique and direct association between MULTI and the different outcome domains. Secondly, we identified associations between outcomes within the same domain (e.g., metabolic health) and between the domains (e.g., metabolic health and social functioning), suggesting potential indirect effects of MULTI. Conclusions: This novel network approach shows that MULTI has direct and indirect associations with various health-related outcomes. These insights contribute to the development of effective treatment strategies in people with severe mental illness.(AU)

The specificity of the auditory P300 responses and its association with clinical outcomes in youth with psychosis risk syndrome / La especificidad de las respuestas auditivas P300 y su asociación con los resultados clínicos en jóvenes con síndrome de riesgo de psicosis

Background: Schizophrenia often occurs in youth, and psychosis risk syndrome (PRS) occurs before the onset of psychosis. Assessing the neuropsychological abnormalities of PRS individuals can help in early identification and active intervention of mental illness. Auditory P300 amplitude defect is an important manifestation of attention processing abnormality in PRS, but it is still unclear whether there are abnormalities in the attention processing of rhythmic compound tone stimuli in PRS individuals, and whether the P300 amplitude induced by these stimuli is specific to PRS individuals and related to their clinical outcomes. Methods: In total, 226 participants, including 122 patients with PRS, 51 patients with emotional disorders (ED), and 53 healthy controls (HC) were assessed. Baseline electroencephalography was recorded during the compound tone oddball task. The event-related potentials (ERPs) induced by rhythmic compound tone stimuli of two frequencies (20-Hz, 40-Hz) were measured. Almost all patients with PRS were followed up for 12 months and reclassified into four groups: PRS-conversion, PRS-symptomatic, PRS-emotional disorder, and PRS-complete remission. The differences in baseline ERPs were compared among the clinical outcome groups. Results: Regardless of the stimulation frequency, the average P300 amplitude were significantly higher in patients with PRS than in those with ED (p = 0.003, d = 0.48) and in HC (p = 0.002, d = 0.44) group. The average P300 amplitude of PRS-conversion group was significantly higher than that of the PRS-complete remission (p = 0.016, d = 0.72) and HC group (p = 0.001, d = 0.76), and the average P300 amplitude of PRS-symptomatic group was significantly higher than that of the HC group (p = 0.006, d = 0.48)...(AU)

Dispositional Mindfulness Mediates the Relationship between Psychotic Symptoms and Psychological Quality of Life / [El mindfulness disposicional media la relación entre los síntomas psicóticos y la calidad de vida psicológica]

Background: To assess the mediator effect of dispositional mindfulness on the relationship between psychotic symptoms and psychological quality of life of people experiencing psychosis. Method: One hundred thirty-eight participants with psychosis were recruited. Psychotic symptoms were assessed through the PANSS scale, dispositional mindfulness was assessed using the MAAS questionnaire, and psychological quality of life was tapped with the WHOQOL-BREF questionnaire. Mediational analysis was performed setting PANSS factors as independent variables, MAAS scores as mediator, and WHOQOL-BREF Psychological as dependent variable. Results: MAAS scores mediated the relationship between WHOQOL-BREF Psychological scores and PANSS Positive (b = -.246, BCa CI [-.345, -.153]), PANSS Negative (b = -.173, BCa CI [-.251, -.096]), and PANSS Depressed scores (b = -.227, BCa CI [-.31, -.148]). Conclusions: Dispositional mindfulness can ameliorate the negative impact of hallucinations, delusions, negative symptoms, and depression feelings on psychological quality of life of people experiencing psychosis.(AU)

Antecedentes: Evaluar el efecto mediador de la atención plena disposicional en la relación entre los síntomas psicóticos y la calidad de vida psicológica de las personas que experimentan psicosis. Método: Se reclutaron 138 participantes con psicosis. Los síntomas psicóticos se evaluaron mediante la escala PANSS, la atención plena disposicional se evaluó utilizando la escala MAAS y la calidad de vida psicológica se exploró con el cuestionario WHOQOL-BREF. Se realizó un análisis de mediación estableciendo los factores PANSS como variables independientes, los puntajes MAAS como mediador y WHOQOL-BREF Psicológico como variable dependiente. Resultados: Las puntuaciones en la MAAS mediaron la relación entre WHOQOL-BREF-Psicológico y PANSS Positivo (b = -.246, IC BCa [-.345, -.153]), PANSS Negativo (b = -.173, IC BCa [-.251, -.096]) y PANSS Depresión (b = -.227, IC BCa [-.31, -.148]). Conclusiones: El mindfulness disposicional puede reducir el impacto negativo de las alucinaciones, delirios, síntomas negativos y sentimientos de depresión en la calidad de vida psicológica de las personas que experimentan psicosis.(AU)

Trayectoria del trastorno formal del pensamiento, desde la observación clínica al análisis computacional / Trajectory of formal thought disorder, from clinical observation to computational analysis

La adecuada comprensión de un término psicopatológico requiere, no solo del conocimiento de la alteración descrita, sino también de los contextos y conceptos a partir de los cuales fue acuñado y de la transformación de los mismos a lo largo del tiempo. En el caso del trastorno formal del pensamiento se describe su evolución desde su incorporación a la psicopatología con fines puramente descriptivos y asociado a la influencia del asociacionismo y a la idea de una dependencia directa entre pensamiento y lenguaje hasta la actualidad, en que el uso de herramientas computacionales y de hipótesis provenientes de la lingüística han promovido su uso como instrumento diagnóstico y marcador pronóstico, al tiempo que ha significado la incorporación de nueva terminología. (AU)

Properly understanding a psychopathological term requires knowledge of the disorder described, the contexts and concepts from which it was coined, and its modification over time. In the case of formal thought disorder, we describe its evolution from its incorporation into psychopathology for purely descriptive purposes and associated with the influence of associationism and the idea of a direct dependence between thought and language to the present day, in which the use of computational tools and hypotheses from linguistics have promoted its use as a diagnostic tool and prognostic marker, while simultaneously leading to the incorporation of new terminology. (AU)

Intersección de síntomas en el trastorno del espectro autista y trastornos psicóticos: a propósito de un caso / Intersection of symptoms in autism spectrum disorder and psychotic disorders: A case report

El rastorno de espectro autista es un trastorno del neurodesarrollo con una prevalencia que llega al 1% de la población. Es frecuente que los síntomas principales de este trastorno, tales como el deterioro de las interacciones sociales, los intereses restringidos o atípicos y las deficiencias cognitivas y de la comunicación verbal, puedan confundirse con la sintomatología de la esfera psicótica propia de la esquizofrenia. Una adecuada evaluación es necesaria, dado que ambas entidades pueden coexistir con una prevalencia variable del 12 al 50%. Presentamos el caso clínico de una mujer que a los 20 años inicia seguimiento en la unidad de salud mental por sintomatología compatible con un trastorno obsesivo-compulsivo junto a una clínica caracterizada por apatía, anhedonia, abandono del autocuidado y progresivo deterioro funcional. Tras varias sesiones de evaluación, llegamos al diagnóstico de un trastorno del espectro autista. Realizamos una revisión bibliográfica en la que concluimos que la intersección de síntomas entre el autismo y la esquizofrenia es común y se aportan recomendaciones clínicas para diferenciar ambas entidades clínicas. (AU)

Autism spectrum disorder is a neurodevelopmental disorder with a current global prevalence of approximately 1%. It is common that the main symptoms of this disorder, such as deterioration in social interactions, restricted or atypical interests, and cognitive and verbal communication deficiencies, can be confused with symptoms of the psychotic sphere typical of schizophrenia. An adequate evaluation is necessary due that both entities can coexist with a variable prevalence of 12 to 50%. Moreover, both disorders can coexist with a variable prevalence of 12 to 50%. We present the clinical case of a woman who, at the age of 20, began follow-up in the mental health unit due to symptoms compatible with an obsessive-compulsive disorder along with a clinic characterized by apathy, anhedonia, abandonment of self-care and progressive functional deterioration. After several evaluation sessions, we diagnosed an autism spectrum disorder. We carry out a bibliographic review with which we conclude that the intersection of symptoms between autism and schizophrenia is common and clinical recommendations are provided to differentiate both clinical entities. (AU)

Is palatal rugae a specific marker of dysmorphogenesis in patients with schizophrenia?

Background and Objectives Supporting the neurodevelopmental model of schizophrenia, minor physical anomalies (MPAs) are markers of abnormalities in early fetal development. The mouth seems to be a common region for the occurrence of MPAs in patients with schizophrenia. This study aimed to compare the palatal rugae patterns, according to their length, shape, and orientation, between patients with schizophrenia and controls in a blinded fashion. The palatal rugae patterns were also evaluated by sex, as its effect on neurodevelopment was relevant. Methods Dental stone models were fabricated from maxilla impressions of patients with schizophrenia (N = 105) and controls (N = 105). Based on their lengths, three types of palatal rugae were classified; primary, secondary, and fragmentary. Primary rugae were further categorized according to their shape and direction. Results The most detected palatal rugae were the primary ones in both groups. The primary, secondary, and fragmentary rugae numbers in both groups were no different. There were significant differences in the shape and orientation of the primary rugae between the two groups. Curved (OR:1.76, p = 0.006), island (OR:2.97, p = 0.001) and nonspecific (OR:5.44, p = 0.004) primary rugae shape were found to be significant predictive variables for schizophrenia. Randomly oriented rugae numbers were higher in schizophrenics than controls (p = 0.018). The two sexes had different preferences in primary rugae shapes and directions compared to same-sex controls in patients with schizophrenia. Conclusion Identifying subtle changes in the primary rugae pattern, which appear to be sex-specific, is consistent with impaired neurodevelopment in schizophrenia. (AU)

Sintonía sin hogar. Historia de un solista solitario / Homeless tune. Story of a lonely soloist

El sinhogarismo supone un problema sociosanitario emergente relacionado principalmente con el desarrollo de patologías mentales y con diversas adicciones. La película El solista, dirigida por Joe Wright, representa un instrumento de gran utilidad para entender esta cuestión dado que revela el caso real de un músico que padece esquizofrenia y que vive en la calle, el señor Nathaniel Anthony Ayers Junior. Al mismo tiempo, la película permite analizar las circunstancias que le llevaron a esa situación y los factores que influyen en el proceso de inclusión social. Por lo tanto, se defiende el empleo de esta película como recurso pedagógico para la formación de estudiantes y profesionales.(AU)

Homelessness is an emerging socio-sanitary problem principally related to the development of mental pathologies and various addictions. The film The Soloist, directed by Joe Wright, represents a very useful resource to understand this issue since it reveals the real case of a musician who suffers from schizophrenia and who is homeless, Mr. Nathaniel Anthony Ayers Junior. At the same time, the film allows to analyze the circumstances that led him to this situation and the factors involved in the social inclusion process. Hence, the use of this film as a pedagogical resource for the training of students and professionals is defended.(AU)

Medication impact on oral health in schizophrenia / Impacto de los medicamentos en la salud bucal en la esquizofrenia

Background: Patients with schizophrenia constitute a particularly vulnerable group for oral diseases. Among thedifferent factors involved, we aimed to examine the evidence of how drugs could contribute to the poorer oralhealth of this population.Material and Methods: An overview of the potential impact of medication on dental/oral health among people withschizophrenia was proposed focusing on selected literature.Results: Studies show a higher dental caries and degree of periodontal diseases in this population and point todrug-induced xerostomia as an important risk factor for oral health deterioration. The risk of dry mouth dependson not only antipsychotics, but also drugs with anticholinergic activity. We hypothesize that antipsychotic inducedglycaemic alterations might contribute to reduced oral health, and that the antimicrobial activity of certain an-tipsychotics could have an impact on oral microbiota affecting oral condition. Pharmacovigilance data show thatinvoluntary movements are caused by typical and some atypical antipsychotics. Dry mouth is most frequentlyreported for quetiapine and olanzapine, while clozapine is more frequently associated with sialorrhea.Conclusions: Literature clearly shows higher caries and periodontal disease in schizophrenic patients. However,overall, there is scarce literature about the potential influence of drugs in these disorders. Health professionalsshould be aware of this issue in order to implement adequate preventive measures in this vulnerable population.(AU)

Proyecto Piloto de Unidad Funcional para Mujeres con Esquizofrenia: Modelo Asistencial de Observatorio-Monitorización-Intervención / Pilot project of a functional unit for women with Schizophrenia: observatory-monitoring-intervention Care model

En los Centros de Salud Mental de Adultos (CSMAs) del Hospital Universitari Mutua Terrassa, en enero de 2023, iniciamos un proyecto piloto de innovación asistencial denominado Unidad Funcional para Mujeres con Esquizofrenia. El objetivo principal de esta comunicación es describir el proceso de designación de las mujeres diana en la unidad, y describir las funciones de los Observatorios de salud física, salud mental y de factores de riesgo psicosocial e inclusión de estas pacientes en los observatorios de salud. De forma complementaria, se describirá el diseño de las Estaciones de Monitorización /Equipos de Vigilancia y las actuaciones o intervenciones específicas centradas en la atención de las necesidades individuales. En la primera fase del proyecto (Enero-Marzo 2023) se revisan las historias clínicas de las mujeres con esquizofrenia para revisar vinculación a profesionales y programas comunitarios. Se describen necesidades de salud física y se revisan antecedentes de consumo de sustancias, uso de benzodiazepinas y opioides, así como aspectos de seguridad farmacológica. En la segunda fase del proyecto (Abril-Junio 2023) se han desarrollado 5 grupos de trabajo (Observatorios de Salud y de Riesgo Psicosocial): 1)Morbi-mortalidad somática, 2)hiperprolactinemia, 3)consumo de sustancias, 4)exclusión social y discriminación, y 5)prescripción y seguridad farmacológica. En la tercera fase del proyecto (Jumio-Septiembre 2023) se desarrollan los Equipos de Vigilancia/Monitorización en Morbi-Mortalidad Somática, hiperprolactinemia, consumo de sustancias, exclusión social/discriminación y seguridad farmacológica, así como intervenciones específicas: colaboración con otras especialidades médicas, consultoría con atención primaria, grupos de ejercicio físico y equipos de intervención en crisis.(AU)

In the context of the Adult Community Mental Health Units (CMHUs) of the Mutua Terrassa University Hospital, we initiated a pilot project of clinical innovation called the Functional Unit for Women with Schizophrenia in January 2023. The main objective of this report is to describe the process of designing a unit targeting women, to characterize the functions of the observatories of Physical Health, Mental Health, and Psychosocial Risk Factors, and to illustrate how these observatories provide surveillance of women’s health needs. The report also describes Monitoring Stations, Vigilance teams, and specific interventions.In the first phase of the project (January - March 2023), medical records from all women with schizophrenia were reviewed to ascertain compliance with clinical appointments and community programs. During this phase, we reviewed physical health records, history of substance use disorders including the use of benzodiazepines and opioid drugs, as well as related aspects of drug safety. In the second phase of the project (April - June 2023), five Observatories of health and social risk factors were developed: 1) somatic morbi-mortality, 2) hyperprolactinemia, 3) use of substances, 4) social exclusion and discrimination, and 5) prescription and drug safety. In the third phase of the project (June-September 2023), we are developing Monitoring Stations or Vigilance teams in these five areas as well as introducing specific interventions: collaboration with primary care and other medical specialties, consultation with primary care teams, physical exercise groups, and crisis intervention units.(AU)

Un paciente con... Tos / A patient with... Cough

El 3,3-10% de la población presenta tos crónica, siendo un motivo frecuente de consulta en Atención Primaria (AP). Se plantea el caso de una mujer de 61 años con tos de 3 meses de evolución. La sospecha diagnóstica es de fibrosis pulmonar en el contexto de una posible artritis reumatoide versus neumonía intersticial descamativa secundaria a aripiprazol. El caso clínico sirve de reflexión sobre la importancia de una buena anamnesis en AP, así como un correcto uso de las pruebas complementarias para valorar causas menos frecuentes de un síntoma común. Debe desarrollarse una capacidad inductiva y valorar el contexto del síntoma guía para confeccionar un diagnóstico sindrómico lo más acertado posible, lo cual es muy valioso en este nivel asistencial. (AU)

Chronic cough is a common reason for consultation in primary care (prevalence approximately 3.3% to 10.0%). We report a case of a 61-year-old woman with a three-month history of cough. The most accurate diagnosis is pulmonary fibrosis in the context of rheumatoid arthritis versus desquamative interstitial pneumonia secondary to aripiprazole. This case study serves as a reflection on the importance of a good history in primary care. Moreover, it is relevant to correctly use complementary tests. It is especially important to make a good syndromic diagnosis and evaluate the context of the patient in front of us. (AU)

Safety and effectiveness of oral blonanserin for schizophrenia in adolescents in China: Data from a 12-week post-marketing surveillance

Background and objectives Blonanserin is a second-generation antipsychotic (SGA)for the treatment of schizophrenia and has been approved for use in Japan, South Korea and China. This analysis aimed to evaluate the effectiveness and safety of blonanserin in Chinese adolescent patients, using data from a post-marketing surveillance of blonanserin started in September 2018. Methods A 12-week, prospective, multi-center, open-label post-marketing surveillance was conducted. Patients in this analysis were stratified by age. Results 78 patients with schizophrenia aged < 18 years were included. The incidence of adverse drug reactions in adolescent patients was 33.3% significantly higher than patients over 40 years old. After 12-week treatment, 8.1% of adolescent patients had a weight gain ≥ 7%, and it was not significantly different from other age groups. Mean Brief Psychiatric Rating Scale (BPRS) total score was significantly reduced at week 12, and the decline of anergia score and thought disturbance score of adolescent patients was significantly greater than in adults. Conclusions Blonanserin was well tolerated and effective in the treatment of schizophrenia in Chinese adolescent patients in real-world clinical practice. Blonanserin might be a reasonable choice for the treatment of schizophrenia in adolescent patients. (AU)

Legalización del consumo de cannabis recreativo en adultos y problemas de salud mentales / Legalization of recreational cannabis use in adults and mental health problems

Los problemas de salud mental hacen parte de las enfermedades no trasmisibles y se les atribuye, con otras enfermedades asociados al bienestar, hasta un 21 % de las muertes mundiales. Por ello, es necesario analizar y establecer la relación riesgo/beneficio de políticas relacionadas con la salud mental, caso de la legalización del consumo de cannabis recreativo en adultos. El cannabis es la droga “ilícita” de mayor consumo en los países occidentales, en esencia por incrementar la sociabilidad y la euforia. En la última década, varios países han promulgado normas orientadas a legalizar la comercialización de cannabis recreativo en adultos. En este sentido, existe controversia del efecto de este tipo de iniciativas, en el porcentaje de personas que consumen esta sustancia y en la salud de los mismos. Sin embargo, se podría esperar que este tipo de iniciativas favorezca un aumento en el porcentaje de personas que consumen esta sustancia. El aumento del consumo de marihuana puede favorecer una mayor prevalencia de problemas de salud mental, incluyendo psicosis y esquizofrenia. Se acepta la existencia de una asociación entre consumo de cannabis y psicosis (incluyendo esquizofrenia). En este marco, reconociendo los beneficios de las políticas de legalización del consumo de cannabis recreativo en adultos, orientadas a superar el enfoque prohibicionista y a buscar la reducción del daño, es conveniente evaluar y definir el efecto de las mismas. Además, estas iniciativas se deben acompañar de programas informativos y educativos, orientados a sintetizar los riesgos del consumo, incluyendo, la dependencia y problemas de salud mentales. (AU)

Mental health problems are included in the non-communicable diseases and together to other problems associated with well-being, they are attributed up to 21 % of global deaths. Therefore, it is necessary to analyze and establish the risk/benefit ratio of policy related to mental health, for example, in the case of the legalization of recreational cannabis use in adults. Cannabis is the most widely used “illicit” drug in Western countries, essentially because it increases sociability and euphoria. In the last decade, several countries have endorsed policies aimed at legalizing the commercialization of recreational cannabis in adults. In this sense, there is controversy about the effect of this type of policy on the percentage of people who consume this substance and on their health. However, it could be expected that this type of initiative will improve the percentage of people who consume this substance. Increased marijuana use may lead to a higher prevalence of mental health problems, including psychosis and schizophrenia. The existence of an association between cannabis use and psychosis (including schizophrenia) is accepted. In this framework, recognizing the benefits of policies to legalize the use of recreational cannabis in adults, advancing from a drug prohibition approach to one focused on harm reduction, it is convenient to evaluate and define the effect of this type of policies. Also, this kind of policies should be linked to informative and educational programs to clarify the risks of consumption, including, dependence and mental health problems. (AU)

Hypoconnectivity networks in schizophrenia patients: A voxel-wise meta-analysis of Rs-fMRI

In recent years several meta-analyses regarding resting-state functional connectivity in patients with schizophrenia have been published. The authors have used different data analysis techniques: regional homogeneity, seed-based data analysis, independent component analysis, and amplitude of low frequencies. Hence, we aim to perform a meta-analysis to identify connectivity networks with different activation patterns between people diagnosed with schizophrenia and healthy controls using voxel-wise analysis. Method: We collected primary studies exploring whole brain connectivity by functional magnetic resonance imaging at rest in patients with schizophrenia compared with healthy controls. We identified 25 studies included high-quality studies that included 1285 patients with schizophrenia and 1279 healthy controls. Results: The results indicate hypoactivation in the right precentral gyrus and the left superior temporal gyrus of patients with schizophrenia compared with healthy controls. Conclusions: These regions have been linked with some clinical symptoms usually present in Plea with schizophrenia, such as auditory verbal hallucinations, formal thought disorder, and the comprehension and production of gestures. (AU)

Glucose metabolism, hippocampal subfields and cognition in first-episode and never-treated schizophrenia

Background: Previous studies have indicated that glucose metabolism and altered hippocampal structure and function play a pivotal role in cognitive deficits in schizophrenia (SZ). This study was designed to explore the inter-relationship between glucose metabolism, hippocampal subfield volume, and cognitive function in the antipsychotics-naive first episode (ANFE) SZ patients. Methods: We chose the fasting insulin, glucose, and insulin resistance (HOMA-IR) index as biomarkers of glucose metabolism. Cognitive function was assessed by the MATRICS Consensus Cognitive Battery (MCCB). The hippocampal subfield volume, glucose metabolism biomarkers, and cognitive function were evaluated in 43 ANFE SZ and 29 healthy controls (HCs). Results: Compared with HCs, SZ patients had higher fasting blood glucose and insulin levels and HOMA-IR (all p < 0.05). Correlation analysis revealed that category fluency performance was positively associated with fasting glucose level. Fasting insulin or HOMA-IR was positively associated with the hippocampal subfield volume in patients (all p<0.05). Moreover, the spatial span index score was associated with the volume of the right presubiculum, subiculum, and right hippocampal tail. In addition, multiple regression analysis found that the interaction effects of insulin × right fimbria or insulin × left fimbria were independent predictors of the MCCB total score. Conclusions: Our findings suggest that abnormal glucose metabolism and cognitive decline occur in the early stage of SZ. The interaction between abnormal glucose metabolism and hippocampal subfields was associated with cognitive functions in SZ. (AU)

Estimulación cerebral profunda subtalámica en un caso de enfermedad de Parkinson idiopática y esquizofrenia / Subthalamic deep brain stimulation in a case of idiopathic Parkinson’s disease and schizophrenia

Introducción La enfermedad de Parkinson (EP) y la esquizofrenia pueden coexistir. Los antipsicóticos bloquean los receptores D2 estriados, lo que inevitablemente agrava las manifestaciones de la EP. Caso clínico Presentamos el caso de un paciente con enfermedad de Parkinson idiopática y esquizofrenia, con pobre tolerancia a dosis mínimas de levodopa, que presentó una gran mejoría tras la estimulación cerebral profunda subtalámica bilateral (ECP-NST). La ECP-NST se consideró aquí, debido a la gravedad de este caso particular, como la única posibilidad de lograr una mejoría motora. Conclusiones El diagnóstico de EP idiopática se confirmó pese al tratamiento antidopaminérgico. La ECP-NST puede considerarse como una opción de tratamiento para las manifestaciones de la EP invalidantes, siempre y cuando la selección del paciente sea cuidadosa. (AU)

Introduction. Parkinson’s disease (PD) and schizophrenia can coexist. Antipsychotics block striatal D2 receptors, which inevitably aggravates the manifestations of PD.Case report. We report the case of a male patient with idiopathic Parkinson’s disease and schizophrenia, with poor tolerance to minimal doses of levodopa, who underwent a dramatic improvement after bilateral subthalamic deep brain stimulation (DBS-STN). DBS-STN was taken into consideration here, due to the severity of this particular case, as the only possible way to achieve motor improvement.Conclusions. The diagnosis of idiopathic PD was confirmed despite antidopaminergic treatment. DBS-STN can be considered a treatment option for disabling manifestations of PD, provided that a careful selection of patients is carried out. (AU)