Publications by authors named "Daniel A Cavalcante"

Article Synopsis
  • Patient responses to antipsychotic drugs like risperidone vary due to clinical and genetic differences, and researchers studied ways to predict these responses in first-episode psychosis (FEP) patients.
  • The study involved 141 FEP patients who were evaluated before and after 10 weeks of treatment, with 51% considered responders based on their improvement on a specific scale.
  • Among the prediction models tested, hybrid models that combined clinical and genetic factors performed best, achieving a balanced accuracy of 72.9%, suggesting these models could improve treatment outcomes.
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Introduction: Schizophrenia is a debilitating disorder that affects a significant proportion of the population and leads to impaired functionality and long-term challenges. The first episode of psychosis (FEP) is a critical intervention stage for improving long-term outcomes. The GAPi program was established in São Paulo, Brazil to provide early intervention services and evaluate biomarkers in individuals with FEP.

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We investigated the DNA methylation profile over LINE-1 in antipsychotic-naive, first-episode psychosis-patients (n = 69) before and after 2 months of risperidone treatment and in healthy controls (n = 62). Patients were evaluated using standardized scales and classified as responders and nonresponders. DNA from blood was bisulfite converted and LINE-1 fragments were amplified and pyrosequencing was performed.

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Psychiatric emergencies are severe behavioral changes secondary to worsening mental illness. Such situations present a risk to the patient and other people, so they need immediate therapeutic intervention. They are associated with feelings of fear, anger, prejudice, and even exclusion.

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Aim: Duration of untreated psychosis (DUP) is one of the few potentially modifiable outcome predictors in psychosis. Previous studies have associated a longer DUP with a poor prognosis, but few of them were performed in countries with low and middle level of income. This study aimed to investigate the DUP in a Brazilian sample of antipsychotic-naïve first-episode psychosis (AN-FEP) patients and its association with clinical characteristics and treatment outcomes in a short-term follow-up.

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Introduction: Cannabis use increases the risk of developing psychosis, and subjects with psychosis are more likely to use cannabis. However, studies on the influence of cannabis on psychotic dimensions, response to treatment, and functional outcomes showed conflicting results. Such heterogeneity may be due the inclusion of patients who were already under treatment, and lack of specificity in evaluations.

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