View clinical trials related to Depressive Disorder, Major.
Filter by:The goal of this study is to examine how whole-body hyperthermia affects the thermoinflammatory profile, which includes the combined immune and heat shock response, in patients with depression and whether these changes correlate with decreased depression in individuals with Major Depressive Disorder.
To evaluate the acute and sustained antidepressant effects of nitrous oxide in people with major depressive disorder; and further evaluate these effects by identifying the optimal dose and regimen to guide current practice, and to plan a future large pragmatic trial.
Mindfulness Based Cognitive Therapy (MBCT) has shown to be an effective method of preventing relapse of an episode Major Depressive Disorder (MDD). MBCT is a group program that integrates mindfulness skills training with cognitive-behavioral strategies. However, the cost of MBCT is not affordable to many families. The aim of this study is to explore the feasibility and efficacy of an MBCT intervention designed to be delivered at low cost through a virtual delivery format. This study will recruit 240 participants who are in remission from depression and randomize them to an MBCT intervention group or treatment as usual (TAU) for the wait list control group. The wait list control group will complete the intervention after the MBCT intervention group. Assessment administered at pre-intervention (baseline), post-intervention for experimental group, and post-intervention for the wait list control group and follow-up for experimental group. The primary outcome is to test the efficacy of this community-based delivery in reducing depression severity and psychiatric distress in the relapse of an episode of MDD. The secondary outcomes include perceived stress, post-traumatic stress symptoms, adherence to treatment plans not given as part of this study, frequency of relapse of MDD, mindfulness skills, and quality of life. This study will also examine the following potential moderators and correlates of intervention outcomes: comorbid diagnoses, life events history, and MBCT intervention adherence. Finally, the study will examine the following mediators of intervention outcome: mindfulness skills, emotion regulation skills, executive functioning skills, savoring, and positive and negative affect.
The main purpose of this study is to investigate the effects of ketamine on decision-making and emotion processing in a sample of individuals diagnosed with Major Depressive Disorder (MDD).
The aim of this study is to assess the impact of ketamine on aesthetic perception and processing. This study assesses the role of these effects in facilitating ketamine's antidepressant properties, with a focus on anhedonia. To address this aim, 25 patients with major depressive disorder and 35 healthy controls will be assessed twice with magnetic resonance imaging, once after administration of intravenous ketamine (subanesthetic dose) and once after administration of placebo.This study has a single-center, placebo-controlled, cross-over study design. During MRI, structural, resting state, and functional imaging will be performed. Functional imaging will comprise aesthetic processing, reward, and sexual arousal paradigms. In addition, various neuropsychological scales assessing depressive symptoms, anhedonia, and aesthetic processing will be performed. Eligibility for participation will be assessed during a screening visit, a follow up visit will end study participation.
Ghrelin is a stomach-derived hormone and the only known circulating peptide that stimulates appetite. Animal studies have conclusively shown that ghrelin increases dopaminergic neurotransmission and, thereby, enhances effort. However, similar evidence on the putative role of ghrelin in humans is still lacking. Here, the investigators propose to conduct a [11C]-raclopride PET/MR study after intravenous administration of ghrelin vs. saline in healthy individuals. First, during an intake visit, the investigators will assess fasting blood levels of hormones involved in appetitive behavior such as ghrelin, leptin, and insulin. In addition, the investigators will conduct a set of tasks that have been associated with dopamine function (i.e., effort and reinforcement learning). Second, the investigators will assess the effects of intravenous administration of ghrelin on dopamine signaling using a double-blind randomized cross-over design. To this end, participants will be infused with ghrelin (vs. saline) while we determine dopamine release (via PET imaging) and assess cerebral blood flow and functional connectivity at rest (via concurrent MR imaging). Furthermore, the investigators will conduct an instrumental motivation task (IMT) where participants have to exert physical effort to obtain rewards. Based on preclinical studies and indirect evidence from human studies, the investigators hypothesize that ghrelin will increase dopamine release in the striatum and that this will, in turn, lead to an increase in the willingness to work for rewards. Moreover, the investigators expect that ghrelin-induced dopamine release will be associated with an elevated tracking of reward utility in the mesolimbic circuit during the IMT, which is known to be associated with response vigor. Collectively, the proposed project would provide a unique resource to test an important link between the gut and the brain in the regulation of appetitive behavior. If ghrelin were to enhance effort expenditure for rewards via dopamine signaling in humans, then restoring sensitivity to ghrelin might be the more promising therapeutic approach compared to antagonizing the ghrelin receptor.
The purpose of this study is to advance a non-pharmacologic suicide preventive intervention with wide dissemination potential as an innovative high-yield solution to reduce suicide rates. The investigators aim to achieve this with this study of Brain Emotion Circuitry Self-Monitoring and Regulation Therapy for Daily Rhythms (BE-SMART-DR), that provides self-directed strategies to regularize sleep and other DRs to reduce short-term suicide risk that can be used lifelong to potentially also reduce long-term suicide risk.
This study is a single-blind, multicenter, randomized, controlled crossover trial. The App, developed in South Korea, is an application that provides integrated interventions for stress reduction for the general population. The App provides three contents based on MBSR, CBT, and relaxation sounds that are known to be effective in stress reduction ("Meditation category", "Cognitive approach", and "Relaxation Sound", respectively). Participants (n = 215) recruited via medical practitioner referral will be randomized to App first group (fAPP) or a waitlist crossover group (dAPP). Inclusion criteria are age 19-65; diagnosed with mild to moderate major depressive disorders (Score of 7-24 on the Hamilton Rating Scale for Depression); Stable medication for 28 days prior to study participation. The study was conducted over eight weeks, the fAPP group used The App for the first four weeks and the dAPP group for the next four weeks, and during all study periods, the participants received usual pharmacological treatment. Primary outcome measures are the Depression Anxiety Stress Scale-21. The analysis will use mixed-model repeated measures.
Prospective observational cohort study to determine cost-effectiveness of ECT compared to medication in the treatment of major depressive disorder (MDD) in the Netherlands.
The study aims to evaluate the contribution of a multi-targeted microbiotherapy at 12 weeks in depressed-patients in a situation of failure of a 1st line of antidepressant treatment and treated in add-on with a 2nd antidepressant, venlafaxine.