Major Depressive Disorder Clinical Trial
Official title:
Mechanisms of Antidepressant Non-Response in Late-Life Depression
This project seeks to elucidate the mechanisms by which antidepressant medications have limited efficacy in Late Life Depression (LLD) in order to develop new treatment interventions for this prevalent and disabling illness. Investigators hypothesize that the presence of executive dysfunction (ED),which is common in depressed adults over 60, impairs the ability to form appropriate expectancies of improvement with antidepressant treatment. Greater expectancy has been shown to improve antidepressant treatment outcome and is hypothesized to be a primary mechanism of placebo effects. Moreover, white matter hyperintensities (WMH) on magnetic resonance imaging (MRI) are more prevalent in patients with LLD compared to healthy controls. It has been argued that WMH contribute to the pathogenesis of LLD with ED and decrease the efficacy of antidepressant medications by disrupting connections between prefrontal cortical (PFC) and subcortical structures. Vascular lesions to white matter tracts may also compromise the pathway by which expectancy-based placebo effects influence depressive symptoms. Expectancies reflect activation in PFC areas that may improve depressive symptoms by modulating the activity of subcortical regions subserving negative affective systems (i.e., amygdala) as well as those important in reward and hedonic capacity (nucleus accumbens and ventral striatum). Thus, LLD patients with ED and WMH may sustain a "double-hit" to their ability to experience placebo effects in antidepressant treatments: ED diminishes the ability to generate appropriate treatment expectancies, while WMH disrupt the physiologic pathways by which expectancies lead to improvement in depressive symptoms.
To determine whether decreased antidepressant medication response in LLD patients with ED and WMH is caused by a loss of expectancy effects, Investigators will evaluate 130 outpatients with LLD at baseline to determine their degree of ED (interference score on Stroop Color-Word Test), WMH burden (severity score on Fazekas modified Coffey Rating Scale derived from anatomical MRI), and white matter tract integrity (using diffusion tensor imaging [DTI]). Building on work from the investigators K23 Award, the investigator will manipulate participants' expectancy of improvement in an 8-week duration antidepressant trial by randomizing patients between open administration of escitalopram (i.e., high expectancy) and placebo-controlled administration of escitalopram (i.e., low expectancy). The difference in antidepressant response observed between open and placebo-controlled medication treatment is a measure of the expectancy contribution to outcome, which is substantial in younger depressed adults but investigators hypothesize this will be diminished in LLD patients with ED and WMH. ;
Status | Clinical Trial | Phase | |
---|---|---|---|
Recruiting |
NCT05537558 -
Precision Medicine for the Prediction of Treatment (PROMPT) Response (PROMPT)
|
||
Terminated |
NCT02192099 -
Open Label Extension for GLYX13-C-202, NCT01684163
|
Phase 2 | |
Completed |
NCT03142919 -
Lipopolysaccharide (LPS) Challenge in Depression
|
Phase 2 | |
Recruiting |
NCT05547035 -
Identification of Physiological Data by a Wearable Monitor in Subjects Suffering From Major Depression Disorders
|
N/A | |
Terminated |
NCT02940769 -
Neurobiological Effects of Light on MDD
|
N/A | |
Recruiting |
NCT05892744 -
Establishing Multimodal Brain Biomarkers for Treatment Selection in Depression
|
Phase 4 | |
Recruiting |
NCT05537584 -
SMART Trial to Predict Anhedonia Response to Antidepressant Treatment
|
Phase 4 | |
Active, not recruiting |
NCT05061706 -
Multicenter Study of Lumateperone as Adjunctive Therapy in the Treatment of Patients With Major Depressive Disorder
|
Phase 3 | |
Completed |
NCT04479852 -
A Study of the Safety and Efficacy of SP-624 in the Treatment of Adults With Major Depressive Disorder
|
Phase 2 | |
Recruiting |
NCT04032301 -
Repeated Ketamine Infusions for Comorbid PTSD and MDD in Veterans
|
Phase 1 | |
Recruiting |
NCT05527951 -
Enhanced Measurement-Based Care Effectiveness for Depression (EMBED) Study
|
N/A | |
Completed |
NCT03511599 -
Cycloserine rTMS Plasticity Augmentation in Depression
|
Phase 1 | |
Recruiting |
NCT04392947 -
Treatment of Major Depressive Disorder With Bilateral Theta Burst Stimulation
|
N/A | |
Recruiting |
NCT05895747 -
5-HTP and Creatine for Depression R33 Phase
|
Phase 2 | |
Recruiting |
NCT05273996 -
Predictors of Cognitive Outcomes in Geriatric Depression
|
Phase 4 | |
Recruiting |
NCT05813093 -
Interleaved TMS-fMRI in Ultra-treatment Resistant Depression
|
N/A | |
Recruiting |
NCT05135897 -
The Neurobiological Fundaments of Depression and Its Relief Through Neurostimulation Treatments
|
||
Enrolling by invitation |
NCT04509102 -
Psychostimulant Augmentation of Repetitive TMS for the Treatment of Major Depressive Disorder
|
Early Phase 1 | |
Recruiting |
NCT06145594 -
EMA-Guided Maintenance TMS for Depression
|
N/A | |
Recruiting |
NCT06026917 -
Assessing Dopamine Transporter Occupancy in the Patients With Depression Brain With Toludesvenlafaxine Hydrochloride Extended-Release Tablets Using 11C-CFT Positron Emission Tomography (PET)
|
Phase 4 |