Functional coupling of M 1 muscarinic acetylcholine receptor to G α q/11 in dorsolateral prefrontal cortex from patients with psychiatric disorders: a postmortem study

AbstractAccumulating studies have implicated intracellular signaling through muscarinic acetylcholine receptors (mAChRs) in psychiatric illness. In the present study, carbamylcholine chloride (carbachol)-induced G αi/o and G αq/11 activation was identified in postmortem human prefrontal cortical membranes. The following two sample cohorts were used: subjects [1], consisting of 40 controls without neuropsychiatric disorders, and subjects [2], consisting of 20 with bipolar disorder (BP), 20 major depressive disorder (MDD), 20 schizophrenia, and 20 controls, strictly sex- and age-matched. Carbachol-stimulated [35S]GTP γS binding to human brain membranes was assessed by the two methods, i.e., conventional method using filtration techniques (Gαi/o activation coupled to M2/M4 mAChRs) applied to subjects [1], and [35S]GTP γS binding/immuno precipitation assay (Gαq/11 activation coupled to M1 mAChR) applied to subjects [1] and [2]. The concentration eliciting the half-maximal effect (EC50), maximum percent increase (%Emax), and slope factor were obtained from concentration –response curve of carbachol-induced Gαi/o and G αq/11 activation. The pEC50 values of both carbachol-induced G αi/o and G αq/11 activations in subjects [1] were significantly correlated, though its implications or underlying molecular processes are unclear. The results of M1 mAChR-mediated G αq/11 activation in subjects [2] indicated no signif...
Source: European Archives of Psychiatry and Clinical Neuroscience - Category: Neuroscience Source Type: research

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Comorbidity is the presence of one or more additional conditions co-occurring with a primary condition. In this episode, host schizophrenic Rachel Star Withers with her cohost Gabe Howard will be discussing comorbidity with schizophrenia. Comorbidity is associated with worse health outcomes, more complex clinical management and increased health care costs. Occupational therapist and host of the podcast Occupied, Brock Cook, will be joining us to discuss ways that he works with people with schizophrenia to manage multiple health issues.  Highlights from “Comorbidity with Schizophrenia” Episode [01:28] What ...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: Antipsychotic Inside Schizophrenia Mental Health and Wellness Psychiatry Psychology Psychotherapy Bipolar disorder and schizophrenia comorbid comorbid psychiatric conditions Comorbidities Comorbidity Diagnosis Of Schizophrenia Livi Source Type: blogs
Authors: Ali Z, Tegin C, El-Mallakh RS Abstract Introduction: Lurasidone has been approved in the United States as a monotherapy and adjunct for acute bipolar I depression, as well as an antipsychotic for patients with schizophrenia.Areas covered: Herein, the authors review the pharmacodynamics and pharmacokinetics of lurasidone as well and the major randomized clinical trials. The authors also provide their expert opinion.Expert opinion: Lurasidone has not been studied in patients with mania or bipolar psychosis. It has been studied, both as a monotherapy and adjunctive treatment to lithium or valproate, in acute ...
Source: Expert Opinion on Pharmacotherapy - Category: Drugs & Pharmacology Tags: Expert Opin Pharmacother Source Type: research
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Source: The American Journal of Psychiatry - Category: Psychiatry Authors: Tags: Am J Psychiatry Source Type: research
This study aimed to investigate the risk of self-harm following diagnosis of different psychiatric disorders in an Asian population, through a review of inpatient records retrieved from the Hong Kong Clinical Data Analysis and Reporting System (CDARS).MethodsFor this nested case-control study, the inpatient data of people admitted for any reason to Hong Kong public hospitals, between Jan 1, 2000, and Dec 31, 2010, were extracted from CDARS. Cases were people aged 10 years or older who had been admitted to inpatient care with a first-listed record of psychiatric disorder during the study period. The seven psychiatric disord...
Source: The Lancet Psychiatry - Category: Psychiatry Source Type: research
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Source: Canadian Journal of Psychiatry - Category: Psychiatry Authors: Tags: Can J Psychiatry Source Type: research
Authors: Barton BB, Segger F, Fischer K, Obermeier M, Musil R Abstract Introduction: Antipsychotic-induced weight-gain (AIWG) is a very important, yet often neglected side-effect in the treatment with first and second generation antipsychotics. AIWG can increase the risk of developing metabolic syndrome, diabetes and cardiovascular disease. Meta-analyses mostly concentrate on AIWG in schizophrenic and bipolar patients, even though antipsychotics are prescribed off-label across many other diagnostic groups (e.g. anxiety disorders, depression, autistic disorder).Areas covered: Pub Med and Web of Science were systemat...
Source: Expert Opinion on Drug Safety - Category: Drugs & Pharmacology Tags: Expert Opin Drug Saf Source Type: research
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Source: UCLA Newsroom: Health Sciences - Category: Universities & Medical Training Source Type: news
ConclusionPsychotropic medication non-adherence was high. It was influenced by various factors operating at different levels. Therefore, comprehensive intervention strategies should be designed to address factors associated with psychotropic medication non-adherence.Systematic review registrationPROSPERO CRD42017067436
Source: Systematic Reviews - Category: International Medicine & Public Health Source Type: research
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Source: Psychiatr News - Category: Psychiatry Tags: Amir Sariaslan anxiety bipolar disorder depression JAMA Psychiatry Paul Appelbaum personality disorders schizophrenia substance use disorder violence Source Type: research
DiscussionCACNA1C rs11615998 was associated with psychotic symptoms (C-allele carriers have decreased psychotic-risk) independently from the diagnosis, in line with the evidence of a cross disorder effect of many risk variants. This gene was previously associated with SCZ and cross-disorder liability to psychiatric disorders. Our findings confirmed that deep phenotyping is pivotal to clarify the role of genetic variants on symptoms patterns.
Source: Neuroscience Letters - Category: Neuroscience Source Type: research
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