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Clinical Trial Summary

The goal of this proposal is to conduct the first pilot study of whether consuming flavanol supplements will augment the cognitive and mood benefits of antidepressant medication in older adults with Late LifeDepression (LLD). Flavanols represent a specific group of plant derived nutrients that are found in cocoa beans, grapes, tea, berries and various other fruits and vegetables. The specific flavanols investigated in this study come from cocoa. Currently available treatments for LLD (i.e., antidepressant medication) are limited in efficacy, especially in individuals who also suffer from cognitive impairment. Recent studies performed at Columbia and elsewhere suggest that flavanols may induce beneficial brain changes that support cognitive functioning and elevate mood, but their precise clinical effects in older adults with combined depression and cognitive impairment remain to be evaluated. For this study, the investigators plan to recruit 50 adults aged ≥60 years who have Major Depressive Disorder, meet a minimum depressive symptom threshold despite currently receiving an adequate trial of an antidepressant, and have a significant cognitive complaints without a diagnosis of dementia. Subjects will be randomized to receive 8 weeks of augmentation treatment with flavanol capsules (in addition to continuing their antidepressant) vs. capsules not containing flavanols. Pre- and post-treatment MRI scanning of the brain will be conducted, and comprehensive pre- and post-treatment neuropsychological assessment will be performed. Results from this project will allow the investigators to evaluate a novel therapeutic approach to LLD, which could have large public health ramifications given the prevalence, frequent treatment resistance, and chronicity characteristic of LLD.


Clinical Trial Description

The goal of this proposal is to conduct the first pilot study of whether consuming a diet high in flavanols will augment the cognitive and mood benefits of antidepressant medication in older adults with Late Life Depression (LLD). LLD affects 3% of community-dwelling adults over 60 years old, and 15% of older adults living in the community have clinically significant depressive symptoms. Diagnosis with LLD increases an older adult's risk of disability by 67-73% over 6 year follow up, causes twice the functional impairment compared to those without LLD, and is associated with high rates of completed suicide in individuals over 65. Currently available treatments for LLD (i.e., antidepressant medication) are limited in efficacy, leading to high rates of recurrence and frequent development of chronicity. Cognitive impairment, which is commonly associated with LLD, predicts poor acute response to antidepressants, leads to higher relapse rates during the continuation phase of treatment, and is associated with the development of adverse age-related health outcomes, including increased risk of dementia, dependence in activities of daily living (ADL), and driving cessation.

Novel treatments addressing LLD's underlying neurobiology are critically needed, particularly therapies that may also have beneficial effects on the cognitive components of LLD. The most extensively studied brain region to be implicated in both the depressive and cognitive aspects of LLD has been the hippocampus. Decreased hippocampal volumes are found in depressed patients compared to controls, and this finding appears to be particularly pronounced in individuals with recurrent depressive illness. Among the subregions comprising the hippocampus, evidence suggests that it is decreased neurogenesis within the dentate gyrus (DG) specifically that may contribute to the development of depression, and it appears that part of the mechanism of action of antidepressants is to enhance neurogenesis in the DG. As the DG is also a critical contributor to the cognitive functions of the hippocampus, it stands out as a highly significant brain region that may be involved with both the mood and cognitive components of LLD. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02943096
Study type Interventional
Source New York State Psychiatric Institute
Contact
Status Terminated
Phase N/A
Start date November 2016
Completion date February 6, 2018

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