Clinical trial NCT05329441: Inflammatory and Glutamatergic Mechanisms of Sustained Threat in Adolescents With Depression
Official title: Inflammatory and Glutamatergic Mechanisms of Sustained Threat in Adolescents With Depression: Toward Predictors of Treatment Response and Clinical Course
Study type: OBSERVATIONAL
Overall status: RECRUITING
Conditions: Depression in Adolescence
Keywords: depression
adolescence
Lead sponsor: University of California, Los Angeles
Sponsor class: OTHER
Collaborators: name: University of Southern California
name: University of California, Irvine
name: Columbia University
name: Mayo Clinic
name: University of California, San Francisco
First posted: 2022-04-15
Enrollment: 160
Sex: ALL
Minimum age (years): 14
Maximum age (years): 21
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Adolescents presenting to school counseling centers, community clinics, and/or medical centers (primary care, psychiatry, etc)

Brief summary: Despite the prevalence and significant public health concern over depression among adolescents, up to 40% of depressed adolescents do not respond to first-line antidepressants (herein termed treatment non-response, TNR). The goal of this project is to recruit and assess 160 treatment-seeking depressed adolescents and test whether acute stress impacts peripheral levels of inflammation and downstream levels of glutamate in corticolimbic regions previously associated with depression, whether these stress-related biomarkers predict TNR to a 12-week trial of either fluoxetine or escitalopram, and whether these stress-related biomarkers predict 18-month clinical course.

Detailed description: Despite the prevalence and public health significance of depression, up to 40% of depressed adolescents do not respond to first-line antidepressants (i.e., serotonin selective reuptake inhibitors \[SSRIs\]). Adolescents with treatment non-response (TNR) are at high risk for physical and mental health difficulties associated with ineffectively treated depression, including cardiovascular disease and suicide. Thus, identifying the neurobiological mechanisms that underlie TNR in adolescents is a critical step toward optimizing treatment plans for those who do not respond to first-line treatments. In this context, sustained threat to social stressors, as measured by elevated inflammatory profiles to stressful stimuli, has been shown to drive the onset and maintenance of depression among adolescents and is associated with TNR. The mechanisms by which elevated inflammation impact the brain in depressed adolescents, however, are unclear. To address these gaps in our knowledge, the investigators will test the central hypothesis that excessive glutamate (Glu) in depression-related corticolimbic circuits-including the anterior cingulate cortex, ventromedial prefrontal cortex, amygdala, and hippocampus-is a critical mediator between peripheral inflammation and TNR in depressed adolescents. Specifically, the investigators will conduct a prospective 18-month study of 160 unmedicated treatment-seeking depressed adolescents using state-of-the-art multimodal neuroimaging data at 7 Tesla. At Time 1 (prior to SSRI treatment) and Time 2 (after an open-label 12-week SSRI trial), the investigators will assess peripheral measures of pro-inflammatory cytokines and glutamate in corticolimbic circuits before and after a well-validated adolescent-version of the Trier Social Stress Test (TSST). At Time 1, the investigators will test if TSST induces increases in inflammation and glutamate in corticolimbic circuits in unmedicated adolescents with depression. At Time 2, the investigators will use machine learning methods to identify multi-level predictors of TNR based on behavioral, inflammatory, and neural indicators of sustained threat to social stress; the investigators will also test whether glutamate in corticolimbic circuits mediates the association between baseline levels of inflammation and TNR. Finally, as an exploratory aim, the investigators will continue to clinically assess depression symptoms and collect information on social stressors (e.g., context, severity, duration) every 3 months for 15 months following Time 2 (i.e., from Time 3 to Time 7), which will enable the use of functional clustering analyses to identify subgroups of adolescents on the basis of depression trajectories (e.g., persistent depression, gradual remission, etc), and identify predictors of these subgroups and other related clinical outcomes (e.g., remission status), while accounting for the effects of TNR status and any changes in treatment (and other related factors, including stressful life events). Results from this work will motivate future studies testing alternative therapeutics for depressed adolescents at risk for treatment resistant depression.

Eligibility criteria: Inclusion Criteria:

* DSM-V criteria for a depressive disorder
* All sexes and genders
* All ethnicities
* Ages 14-21
* Postpubertal (Tanner stage \> 3)
* No medications that will interfere with the study (including antidepressants, mood stabilizers, hormone supplements, steroids, etc.) for at least 2-6 weeks (depending on exact medication)
* Currently being seen by a clinician who will treat the participant with fluoxetine or escitalopram
* The ability to provide assent, understand, and complete all study procedures
* Caregiver consent (if applicable)

Exclusion Criteria:

* Primary mental health diagnosis other than a depressive disorder according to DSM-V
* Any contraindications to MRI scanning, phlebotomy, or SSRI treatment
* Stimulant usage
* A concussion within the last 6 weeks or any lifetime concussion with loss of consciousness for at least 10 minutes
* Any inflammatory conditions or use of anti-inflammatory medications that may influence study findings
* Any major neurological or developmental disorders which could impact the participant's ability to comply with study procedure
* Meeting for current or lifetime criteria of mania or psychosis, diagnosis of bipolar disorder, or any substance use disorders
* First-degree relative with current, past, or suspected mania or psychosis

Primary outcomes:
measure: Children's Depressing Rating Scale-Revised
timeFrame: baseline and 12-week follow-up
measure: Reynolds Adolescent Depression Scale-2 (RADS-2)
timeFrame: baseline and 12-week follow-up
measure: Kiddie Schedule for Affective Disorders and Schizophrenia (KSADS-PL)
timeFrame: baseline and 12-week follow-up
Secondary outcomes:
measure: Patient Health Questionnaire-9
timeFrame: baseline and 12-week follow-up
measure: Mood Ratings on the Trier Social Stress Test
timeFrame: Acute (baseline and throughout study procedures)
Other outcomes:
measure: Generalized Anxiety Disorder-7
timeFrame: baseline and 12-week follow-up
measure: Multidimensional Anxiety Scale for Children-2 (MASC-2)
timeFrame: baseline and 12-week follow-up
measure: Glutamate
timeFrame: Acute (baseline and 90 min. follow-up)
measure: Glutamate
timeFrame: baseline and 12-week follow-up
measure: IL-6
timeFrame: Acute (baseline and 90 min. follow-up)
measure: IL-6
timeFrame: baseline and 12-week follow-up
measure: TNF-a
timeFrame: Acute (baseline and 90 min. follow-up)
measure: TNF-a
timeFrame: baseline and 12-week follow-up
measure: CRP
timeFrame: Acute (baseline and 90 min. follow-up)
measure: CRP
timeFrame: baseline and 12-week follow-up
Locations:
city: Los Angeles
country: United States
facility: University of California, Los Angeles
state: California
Study officials:
affiliation: University of California, Los Angeles
name: Tiffany Ho, Ph.D.
role: PRINCIPAL_INVESTIGATOR
References: