View clinical trials related to Major Depressive Disorder.Filter by:
The overarching aim of the study is to determine the role of insulin signaling on the neurobiological substrates subserving anhedonia within individuals with mood disorders (i.e., Bipolar Disorder (BD) and Major Depressive Disorder (MDD)). Specific aims include: 1. Molecular: Assessment of components of the insulin cascade, as well as of anhedonia and reward-related processes, using a proteomics and gene expression approach; 2. Physiology: Measurement of peripheral sensitivity to insulin and metabolic correlates, including body mass index and dyslipidemia; 3. Neural Circuits: Evaluation of the insulin sensitivity of prefrontal (e.g. prefrontal cortex) and striatal (e.g. nucleus accumbens, ventral tegmental area) networks in the resting-state and during an effort-based decision making test, using acutely administered intranasal insulin and functional magnetic resonance imaging (fMRI); 4. Behavioral: Measurement of willingness to make effort for rewards, as well as of other components of reward response and anhedonia, using validated behavioral tasks and clinical scales (e.g. Snaith-Hamilton Pleasure Scale - SHPS). This initiative represents a proof-of-concept study that insulin is important to anhedonia, neurocognitive functioning, and behavioural deficits in MDD, representing a novel and safe therapeutic avenue.
Major depressive disorder is a common mental disorder and the leading cause of disability worldwide. According to the Canadian Network for Mood and Anxiety Treatment, early improvement following an antidepressant treatment is correlated with response and remission. Escalation of an antidepressant dose after 2 weeks, as opposed to 4 to 8 weeks, is proposed to favor early improvement. However, this has never been tested systematically in a controlled study involving major depressive disorder patients that are non-responders to their antidepressant treatment.
Depressive disorder is known as being accompanied with the activation of immune system which could lead to a series of changes including the neuron apoptosis, synapses transmission inhibition and emotional symptoms. The activation of protein kinase C (PKC) can reverse the immune/inflammatory process and restore the neuroplasticity and neurotransmitters transmission. Based on our finding that patients with major depressive disorder (MDD) showed a significantly lower gene expression of PRKCB1, while the PKC activation mediated by PRKCB1, we hypothesize that PRKCB1 contribute to the development of MDD and treatment response by its specific expression in brain, regulating ERBB, Chemokine signaling pathways and PKC activation during the neuroinflammatory process. In the present study, we aim to evaluate and verify the regulation effect of PRKCB1 on the neuroimmune and inflammatory mechanism in depressive disorder by a serious of studies focus on PRKCB1 gene expression modulating process and different downstream biomarkers which associated with PRKCB1 effect, combined with the specified treatment (plus omega-3 poly unsaturated fat acids). This study may provide scientific evidences for using neuroinflammatory biomarkers to diagnose MDD, as well as personalized treatment.
This early-stage trial aims to examine the feasibility, tolerability, and safety of Floatation-REST (Reduced Environmental Stimulation Therapy) or an active comparison condition in 75 participants with clinical anxiety and depression.
This research study is designed to look at the involvement of the glutamate system and synaptic density in depression and bipolar disorder. Each participant will undergo a screening appointment to determine study eligibility. Thereafter, the study will take 2 or 3 visits depending on schedule availability and will consist of a combination of one magnetic resonance imaging (MRI) or functional magnetic resonance imaging (fMRI) scan, one proton magnetic resonance spectroscopy (MRS) and/or one C13 MRS scans, and up to two positron emission tomography (PET) scans. Participants will also participate in cognitive testing. Depending on camera time, staff availability and subject schedule, total study participation may last 1-2 months.
Previous research has suggested that probiotics can improve depressive symptoms in patients with Major Depressive Disorder (MDD), particularly when used in addition to antidepressants. The aim of this exploratory pilot study is to improve the investigator's understanding of the mechanisms underlying these effects. This study will assess the effects of an 8-week double-blind placebo-controlled probiotic intervention on the gut microbiome, inflammatory marker levels, brain activity and neurotransmitter levels in patients with MDD and their relationship to changes in mood. This study will also recruit a group of demographically-matched healthy controls for gut microbiome comparison with the MDD group (non-interventional).
The purpose of this study is to evaluate the intermediate-term efficacy and tolerability of a multiple-dosing ketamine infusion paradigm for the treatment of medication-refractory major depressive disorder (MDD). We are using a two-phase design. The first phase is a 3-week double blind parallel design clinical trial comparing 6 infusions of ketamine compared to 6 infusions of midazolam in 24 adolescents with treatment resistant depression. The primary outcome of this phase will be Children's Depression Rating Scale (CDRS) score at Day 18. The second phase is a 6-month open phase in which patients who received midazolam and remain depressed with be offered open ketamine treatment (6 infusions over 3 weeks). All participants will be followed weekly for 6 months and tracked for time to relapse.
This is a 12 month, pragmatic trial designed to assess the differences in a digital medicine system (DMS)- ABILIFY MYCITE (Aripiprazole tablets with sensor)- measuring adherence versus treatment as usual (TAU) for adult patients with schizophrenia, bipolar I disorder, and major depression. Outcomes of interest will be adherence as measured by refill rates and all-cause and psychiatric health care use. Each patient will be in the study for a duration of 12 months. All treatment medication decisions will be made by the healthcare professionals (HCPs) and not by protocol. Psychiatrist(s), nurse(s) and/or team manager(s) who will be responsible for subjects' care, will be considered as HCPs in this trial.
Investigate the clinical subtypes and the biological markers to personalize the use n-3 PUFAs (EPA, DHA, and EPA/DHA) in MDD.
The investigators are conducting a randomized controlled trial to evaluate the antidepressant effects of nitrous oxide in people with Major Depressive Disorder (MDD). MDD is a global medical condition that causes significant health and economic burden. Recent studies have shown that a single dose of ketamine, an NMDA-antagonist, has fast and long lasting anti-depressant effect. Nitrous oxide, another NMDA-antagonist, is widely used for anesthesia and analgesia, safer to administer and has fewer side effects than ketamine. A randomized controlled crossover feasibility study showed significant reduction in depressive symptoms at 2 and 24 hours after a single 1-hour treatment session of inhaled nitrous oxide compared with placebo. Nitrous oxide is inexpensive and can be safely administered by any trained clinician. If found to be efficacious, it could be used to provide rapid anti-depressant effect whilst the benefit of traditional anti-depressants has its delayed effect. Another potential application could be in acutely suicidal patients. This investigated-initiated phase 2b trial will enable confirmation and extension of the findings from the feasibility study, and identify the optimal dose and regimen in a broader population of those with MDD. Participants will be randomized to receive a weekly 1-hour inhalational sessions of either nitrous oxide or placebo (oxygen-air mixture) for 4 weeks, and the nitrous group will be further randomly assigned to a dose of 50% nitrous oxide or 25% nitrous oxide. Depression severity will be assessed by a blinded observer pre-treatment and at weekly intervals during and for 4 weeks after treatment using the Hamilton Depression Rating Scale.