Active clinical trials for "Depressive Disorder, Major"

Depression is one of the most common symptoms of multiple sclerosis (MS) with a life-time prevalence of major depressive disorder (MDD) of up to 50%. Depression occurs more frequently in MS than in other chronic diseases including other neurological and inflammatory disorders and may contribute to lower quality of life, cognitive problems, difficulties at work, and poorer long term health outcomes. Despite its clinical relevance, the biological mechanisms which may be responsible for the high risk for MS patients to develop depression are unknown. In this observational study, investigators explore the molecular mechanisms responsible for the impaired regulation of immune cells in relapsing-remitting (RR) MS patients with depression. Investigators will compare the molecular and phenotypical profile of immune cells obtained from RRMS patients with clinical depression (n=50), matched MS patients who do not suffer from depression (n=50) as well as matched healthy controls (n=50) and matched patients with depression but without a comorbid neurological disorder (n=50).

This project aims to use sensors to monitor physiological signals, sleep patterns, vocal characteristics, activity, location and phone usage in study patients with depression who are receiving standard treatment (compared with healthy controls).

The purpose of this study was to evaluate the feasibility and compliance with a novel method for assessing mood and cognition in participants with major depressive disorder (MDD).

The purpose of this study is to examine concurrent validity of 8 computerized tests intended for the assessment of cognitive function in participants with Major Depressive Disorder (MDD), relative to 8 corresponding and previously validated examiner-administered cognitive tests.

The investigators propose to examine both resting state activity and functional activity during rumination and during self-processing to study the relationship between neural correlates of rumination/self-focus and self-processing in major depression and bipolar disorder.

There is heterogeneity in patients with depression. Many scholars propose that individualization of antidepressant achieves better outcomes. However, the scientific theoretical basis of individualized treatment is still quite weak. Different clinical subtypes of depression and their possible biomarkers are critically needed to provide the individualization with theoretical base. Diagnostic types of major depression disorder (MDD) based on the Theory of Traditional Chinese Medicine (TCM) and possible differentiations in neurobiochemistry, metabonomics and neuroimaging could be one of ways to explore the biomarkers and support the theory of the individualized treatment. The hypothesized results will be of help to clarify the biological basis of MDD with LDQS and with DBHS, to provide the TCM with further scientific evidence, to explore the pathogenesis of depression, to improve the objective diagnosis of depression, and to promote targeted interventions by Western medicine, TCM or both.

The purpose of this study is to learn if measures of brain activity are different in children and adolescents with depression who are in different stages of treatment. This is important because it may identify a biological marker for depression that could one day be used to identify depressed children who would benefit from certain treatments (medications for example), or to monitor how well treatments are working. Brain activity measures(known as cortical excitability and inhibition) will be collected by Transcranial Magnetic Stimulation (TMS). TMS is a noninvasive (no surgery or implants) brain stimulation technology which can make parts of the brain work without putting any wires or chemicals into the body. Measurements will take place over one 3-hour visit. This study does not provide any form of treatment. *There is an optional portion of the study that uses a brain scan to gather measures of brain structure and brain chemicals. The brain scan is called magnetic resonance and spectroscopy (MRI/MRS). MRI/MRS uses magnetic fields to study the structure of the brain and brain chemicals. The PI will determine eligibility for the MRI/MRS portion of the study.

The primary objective of this study is to investigate the biological components of major depression. The investigators are particularity interested in genetic variation and how it contributes to cortisol (because cortisol is higher in severe depression than mild depression or healthy controls) and how it contributes to clinical symptoms, especially suicidal ideation/behavior and psychosis.

This study aims to investigate reward learning across the mood disorder spectrum and to investigate the predictive validity of reward learning for subsequent symptom severity.

The purpose of this retrospective observational study is to evaluate the characteristics of patients receiving Seroquel XR as treatment for their Major Depressive Disorder. The study will also investigate how the medication is used for these patients and if there are any differences in drug utilisation between the included countries. The study is observing patients initiating Seroquel XR during a 9 month period corresponding to 3 to 12 months following the launch of the product in each country for the MDD indication. A drug utilisation questionnaire will be used to collect study data from patients' medical records.