5HT1B receptor-mediated pre-synaptic depression of excitatory inputs to the rat lateral habenula.

5HT1B receptor-mediated pre-synaptic depression of excitatory inputs to the rat lateral habenula. Neuropharmacology. 2014 Feb 6; Authors: Hwang EK, Chung JM Abstract Accumulating lines of evidence indicate that the lateral habenula (LHb), which reciprocally interacts with raphe nuclei (RN), displays hyperactivity including synaptic potentiation of excitatory inputs to the LHb during a depressed state. Despite the potential importance of glutamatergic excitatory synapses in depression-like behavior, modulation of these LHb synapses by monoamines such as serotonin (5HT) is not fully understood at the cellular and molecular level. Therefore, we used whole cell voltage-clamp recording to examine the molecular mechanisms by which 5HT modulates glutamatergic transmission in the LHb. The present study provides the first evidence that glutamatergic transmission of LHb synapses is inhibited by activation of the 5HT1B receptor at the pre-synapse in both acute depression (5HT-AD) and long-term depression (5HT-LTD). We further show that 5HT-AD results from the activation of Shaker-type K(+) channels whereas 5HT-LTD depends on inhibition of the adenylyl cyclase-cAMP (AC-cAMP) pathway with an increase in pre-synaptic Ca(2+) release from ryanodine-sensitive internal stores in a NO-dependent manner. PMID: 24508708 [PubMed - as supplied by publisher]
Source: Neuropharmacology - Category: Drugs & Pharmacology Authors: Tags: Neuropharmacology Source Type: research

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ConclusionsIn addition to confirming the role of MDD, we demonstrate that ADHD and schizophrenia likely play a role in the aetiology of self-harm using multivariate genetic designs for causal inference. Among the many individual risk factors we simultaneously considered, our findings suggest that systematic detection and treatment of core psychiatric symptoms, including psychotic and impulsivity symptoms, may be beneficial among people at risk for self-harm.
Source: PLoS Medicine - Category: Internal Medicine Authors: Source Type: research
Authors: Andrade C Abstract In observational studies, significant associations have often been identified between antidepressant drug prescription during pregnancy, on the one hand, and autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD), on the other. Interpreting these associations is problematic because they are based on analyses that could not adjust for inadequately measured, unmeasured, and unknown confounds. Recent clinical data suggest that a genetic relationship exists between depression and neurodevelopmental disorders. A very recent study identified many genetic loci that w...
Source: Journal of Clinical Psychiatry - Category: Psychiatry Tags: J Clin Psychiatry Source Type: research
CONCLUSIONS: Elevated risk of eating disorders as well as of MDD, OCD, and anxiety disorders was found in international adoptees. A parallel pattern between AN and OCD was observed, which both display less elevated rates than the other diagnoses. A considerable number of biological, environmental, and societal factors have been suggested to explain the observed differences in mental health between adoptees and non-adoptees, but they remain primarily theoretical. PMID: 32452335 [PubMed - in process]
Source: Epidemiology and Psychiatric Sciences - Category: Psychiatry Tags: Epidemiol Psychiatr Sci Source Type: research
Although there is extensive research indicating the vital role of functional emotion regulation (ER) in healthy psychological development, such research has neglected examination of adolescents. One potential reason for this neglect is the lack of valid ER instruments developed specifically for adolescents. Further, the available ER instruments for adolescents usually require elaborate forms of cognitive reasoning about the internal sequences of cognitions and emotions. To address these limitations, we developed the Adolescents’ Emotion Regulation Strategies Questionnaire (AERSQ), a self-report instrument of adolesce...
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
Determination of atomoxetine or escitalopram in human plasma by HPLC: Applications in neuroscience research studies
. Int J Clin Pharmacol Ther. 2020 May 25;: Authors: Teichert J, Rowe JB, Ersche KD, Skandali N, Sacher J, Aigner A, Regenthal R Abstract BACKGROUND: Atomoxetine and escitalopram are potent and selective drugs approved for noradrenergic or serotonergic modulation of neuronal networks in attention-deficit hyperactivity disorder (ADHD) or depression, respectively. High-performance liquid chromatography (HPLC) methods still play an important role in the therapeutic drug monitoring (TDM) of ...
Source: International Journal of Clinical Pharmacology and Therapeutics - Category: Drugs & Pharmacology Tags: Int J Clin Pharmacol Ther Source Type: research
Authors: Cichoń L, Janas-Kozik M, Siwiec A, Rybakowski JK Abstract Bipolar disorder (BD) is characterized by pathological changes in mood as well as recurring episodes of mania, hypomania, depression and mixed symptoms. In recent years, the number of BD diagnoses has risen considerably in children and adolescents. Itis believed that anaverage rate of prevalence of bipolar spectrum disorder in the pediatric population is 1.8%, and BD type I - 1.2%, and the prevalence of the disorder increases with the age of patients. Despite the same diagnostic criteria, there are premises that suggest thatthe symptoms of the diso...
Source: Psychiatria Polska - Category: Psychiatry Tags: Psychiatr Pol Source Type: research
Although adolescents with attention-deficit hyperactivity disorder (ADHD) have a higher risk of suicidality and more problems related to school bullying, and quality of life (QoL) is reportedly associated with school bullying, suicide, and ADHD, no study h...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Age: Adolescents Source Type: news
This study examined both longitudinal and cross-directional associations between the degree of childhood and adolescent emotional and behavioral problem characteristics and a higher level of daily screen time in adolescence using an extensive population study. Questionnaires providing data on a representative cohort sample (the Northern Finland Birth Cohort 1986 Study, NFBC 1986; n = 6479; 3101 males) were completed at birth, in childhood, and in adolescence. Male gender, and self-reported behavioral issues (such as a higher degree of hyperactivity/distractibility problems at the beginning of formal schooling...
Source: Issues in Mental Health Nursing - Category: Nursing Tags: Issues Ment Health Nurs Source Type: research
Authors: Karaş H, Çetingök H, İlişer R, Çarpar E, Kaşer M Abstract Objective: The first aim of this study was to determine the prevalence of childhood and current attention deficit hyperactivity disorder (ADHD) symptoms in patients with fibromyalgia. The second aim is to assess the role of depression and anxiety on the relationship between childhood and adult ADHD symptoms with disease impact in this population.Methods: Sixty-four patients with fibromyalgia were compared to matched 58 healthy controls. All participants completed the Wender Utah Rating Scale (WURS), Adult ADHD Self-Report Scal...
Source: International Journal of Psychiatry in Clinical Practice - Category: Psychiatry Tags: Int J Psychiatry Clin Pract Source Type: research
by Beate Leppert, Louise A. C. Millard, Lucy Riglin, George Davey Smith, Anita Thapar, Kate Tilling, Esther Walton, Evie Stergiakouli Psychiatric disorders are highly heritable and associated with a wide variety of social adversity and physical health problems. Using genetic liability (rather than phenotypic measures of disease) as a proxy for psychiatric disease risk can be a useful alternative for research questions that would traditionally require large cohort studies with long-term follow up. Here we conducted a hypothesis-free phenome-wide association study in about 300,000 participants from the UK Biobank to examine...
Source: PLoS Genetics - Category: Genetics & Stem Cells Authors: Source Type: research
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