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Vagus nerve stimulation and gut microbiota interactions: a novel therapeutic avenue for neuropsychiatric disorders.
Neurosci Biobehav Rev
December 2024
Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Epilepsy Research Center, Department of Neurosurgery, Münster University, Germany; Shefa Neuroscience Research Center, Khatam Alanbia Hospital, Tehran, Iran. Electronic address:
The rising prevalence of treatment-resistant neuropsychiatric disorders underscores the need for innovative and effective treatment strategies. The gut microbiota (GM) plays a pivotal role in the progression of these diseases, influencing the brain and mental health through the gut-brain axis (GBA). The vagus nerve plays a significant role in the GBA, making it a key area of focus for potential novel therapeutic interventions.
View Article and Find Full Text PDFResponse to clozapine in treatment resistant schizophrenia is related to alterations in regional cerebral blood flow.
Schizophrenia (Heidelb)
December 2024
Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.
PET and SPECT studies in treatment-resistant schizophrenia (TRS) have revealed significant alterations in regional cerebral blood flow (CBF) during clozapine treatment, which may vary according to the clinical response. Here, we used the more recent MRI approach of arterial spin labelling (ASL) to evaluate regional CBF in participants with TRS (N = 36) before starting treatment with clozapine compared to in healthy volunteers (N = 16). We then compared CBF in the TRS group, before and after 12 weeks of treatment with clozapine (N = 24); and examined the relationship of those differences against changes in Positive and Negative Syndrome Scale for Schizophrenia (PANSS) scores over the treatment period.
View Article and Find Full Text PDFOptimization of Clozapine Treatment: Study of Variables Affecting Response in Uruguayan Patients With Schizophrenia.
J Clin Psychopharmacol
December 2024
Human Molecular Genetics Laboratory, Institut Pasteur de Montevideo.
Purpose/background: Clozapine is the recommended drug for treatment-resistant schizophrenia. Drug response could be affected by numerous factors such as age, sex, body mass index, co-medication, consumption of xanthine-containing beverages, smoking, and genetic variants of the enzymes involved in clozapine metabolism (CYP1A2, CYP3A4, and, to a lesser extent, CYP2C19 and CYP2D6). This study evaluated genetic and nongenetic variables that may affect clozapine plasma concentrations in Uruguayan patients with schizophrenia.
View Article and Find Full Text PDFEfficacy and safety of evenamide, a glutamate modulator, added to a second-generation antipsychotic in inadequately/poorly responding patients with chronic schizophrenia: results from a randomized, double-blind, placebo-controlled, phase 3, international clinical trial.
Neuropharmacology
December 2024
NeurWrite LLC, Morristown, NJ, USA.
Background: Evenamide, a glutamate modulator, is currently in phase 3 of development as add-on treatment to antipsychotics in patients with inadequate response or treatment-resistant schizophrenia. This study was designed to determine if patients with chronic schizophrenia inadequately responding to a second-generation antipsychotic would benefit from add-on treatment with evenamide at a dose of 30 mg bid.
Methods: Study 008A was a prospective, 4-week, randomized, double-blind, placebo-controlled study evaluating the safety, tolerability, and efficacy of oral doses of evenamide of 30 mg bid in patients with chronic schizophrenia treated at stable therapeutic doses of a second-generation antipsychotic.
Clozapine treatment continues to be recognized as the gold standard for managing treatment-resistant schizophrenia. Combining clozapine with other antipsychotics (i.e.
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