A single subanesthetic dose infusion of the N-methyl-D-aspartate (NMDA) receptor antagonist ketamine has rapid and robust antidepressant effects in patients with treatment-refractory major depressive disorder (TRD). A family history of an alcohol use disorder (Family History Positive, FHP) is one of the strongest identified predictors of an improved antidepressant response to ketamine. Like ketamine, alcohol is a functional NMDA receptor antagonist. FHP is associated with differential response to ketamine, e.g. blunted psychotomimetic side effects. One of the primary mechanistic hypotheses for ketamine's antidepressant action is the acute intrasynaptic release of glutamate from major output neurons, e.g. cortical pyramidal cells. Preliminary clinical studies have demonstrated this acute glutamate "surge" in response to subanesthetic dose ketamine. Based on these findings, the investigators hypothesize that ketamine's enhanced antidepressant efficacy in FHP TRD subjects is, at least in part, attributable to increased glutamate release relative to TRD subjects without a family history of alcohol use disorder (Family History Negative, FHN). To test this hypothesis, the investigators have designed a now two-site, open-label study of 18-55-year-old medically and neurologically healthy, currently moderately-to-severely depressed TRD patients. In total, the investigators plan to recruit 25 FHP and 25 FHN TRD subjects. All subjects must not have a current substance use disorder (except nicotine or caffeine). The experimental portion consists of two phases. The preliminary first phase is a medication taper (if needed) and psychotropic medication-free period. The experimental second phase comprises one subanesthetic dose (0.5mg/kg x 40 minute) ketamine infusion. The ketamine infusion will occur during 7T-magnetic resonance imaging (MRI), both resting-state functional MRI (rs-fMRI) and magnetic resonance spectroscopy (MRS) to detect glutamate in the ventromedial prefrontal cortex/ventral anterior cingulate cortex (vmPFC/vACC). The primary outcome measure is group mean change in Montgomery-Åsberg Depression Rating Scale (MADRS) score from pre-ketamine infusion (baseline) to one-week post-infusion, where the investigators observed ketamine's greatest antidepressant effect in FHP TRD. Additional outcome measures are vmPFC/vACC glutamate change in response to ketamine based on family history status. In summary, this study will provide key mechanistic information on ketamine's improved antidepressant efficacy in a biologically-enriched subgroup. This will contribute to the systematic development of more efficacious, personalized treatments for major depression in an effort to reduce its enormous public health burden.
Objective: Glutamate-based medications including the glutamate modulator ketamine result in rapid, robust and sustained (typically up to one week) antidepressant effects in randomized controlled trials in treatment-refractory unipolar and bipolar depression. Previous work by the investigators' group has demonstrated that a family history of alcohol dependence predicts a more robust antidepressant response to ketamine in both treatment-resistant unipolar and bipolar depression. Recently-detoxified alcoholics and affected first-degree relatives display blunted psychotomimetic, cognitive and other neuropsychiatric effects when administered a subanesthetic dose of ketamine. Based on the prior post hoc results, the investigators seek to prospectively demonstrate that a family history of an alcohol use disorder predicts a more robust antidepressant response to ketamine. Study Population: 18-55 year old TRD without psychotic features patients in a current major depressive episode of at least moderate severity will be recruited and enrolled in this study. All subjects must not have a current substance use disorder (except nicotine or caffeine). All subjects must be psychotropic medication-free for at least two weeks prior to the ketamine infusion. The targeted number of completers is 50 depressed subjects (60 signing consent to account for attrition): 25 FHP subjects \[as defined by either one first degree relative or two second-degree relatives with an alcohol user disorder on the Family Interview for Genetics Studies (FIGS) and Family Tree Questionnaire (FTQ)\] and 25 FHN negative subjects. Design: This study is currently a single site, open-label protocol in psychotropic medication-free depressed subjects. This protocol consists of two phases. Phase I consists of a medication taper (if needed) and at least two week drug-free period. Phase II includes a subanesthetic/antidepressant dose ketamine infusion during 7T-MRI. Outcome Measures: The primary hypothesis/outcome measure will be mean change in MADRS total score from the pre-ketamine infusion (baseline) to 7 days post-infusion between the FHP and FHN groups. Other exploratory measures include glutamate alterations during intravenous ketamine infusions and rs-fMRI as a function of family history status.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
60
Treatment
University of Iowa Health Care
Iowa City, Iowa, United States
RECRUITINGMontgomery-Åsberg Depression Rating Scale (MADRS)
The MADRS contains 10 items, and each item is scored 0-6. These item scores are summed to create a scale score; thus, scale scores range from 0 to 60. A scale score of 0 indicates the absence of depressive symptoms, while a score of 60 indicates severe depression. The primary outcome is the mean change in total MADRS score. A decrease in the mean MADRS score indicates a decrease (or improvement) in depressive symptoms, whereas an increase in the mean MADRS score indicates an increase (or worsening) in depressive symptoms.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Concentration of Glutamate and Other Neurometabolites
High-magnetic field strength (7T) proton magnetic resonance spectroscopy (1H-MRS) detectable glutamate and other neurometabolites, e.g. N-acetylaspartate and creatine
Time frame: Prior to and during ketamine infusions
Resting State Functional Connectivity
Task-free ("resting state") functional magnetic resonance imaging (rs-FMRI) to detect changes in blood oxygen-level dependent (BOLD) signal
Time frame: Prior to and during ketamine infusions
Hamilton Depression Rating Scale (HDRS)
The HDRS is a clinician-administered depression rating scale that contains 21 items. The first 17 items are summed to create a total scale score. Score ranges indicate depression severity: 0-7 indicates the absence of depression, 8-13 indicates mild depression, 14-18 indicates moderate depression, 19-22 indicates severe depression, and \>22 indicates very severe depression.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Beck Depression Inventory (BDI)
The BDI is a self-administered 21-item measure of depression severity. Each item is scored (in increasing severity) on a scale from 0-3. Total scores range from 0-63: 0-9 indicates no depression, 10-18 indicates mild depression, 19-29 indicates moderate depression, \>29 indicates severe depression.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Hamilton Psychiatric Rating Scale for Anxiety (HAM-A)
The HAM-A is a clinician-administered scale of anxiety severity that comprises 14 items rated on a scale of 0-4. The HAM-A total score is the sum of 14 items with a score range from 0-56, with lower scores indicating low levels of anxiety and higher scores indicating greater anxiety severity.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Young Mania Rating Scale (YMRS)
The YMRS scale is an 11-item clinician-administered rating scale to assess hypo/manic symptoms. Items 5, 6, 8, and 9 (irritability, speech, content and disruptive-aggressive behavior) are rated on a scale from 0 (symptom not present) to 8 (symptom extremely severe). The remaining items are rated on a scale from 0 (symptom not present) to 4 (symptom extremely severe). Items 5, 6, 8, and 9 are given twice the weight of the remaining 7 items. The YMRS total score ranges from 0 to 60. Lower scores indicate absence of manic-like symptoms while higher scores indicate increasingly severe manic-like symptoms.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Snaith-Hamilton Pleasure Scale (SHAPS)
The SHAPS scale is a 14-item self-reported instrument to measure anhedonia. Scale scores are created by summing each item. Higher scale scores indicate more anhedonia, and lower scale scores indicate increased hedonic value.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Temporal Experience of Pleasure Scale (TEPS)
The TEPS scale is an 18-item self-reported questionnaire that measures pleasure associated with the consumption and anticipation of rewards. Lower scores indicate less pleasure while higher scores indicate greater hedonic value.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Scale for Suicidal Ideation (SSI)
The SSI is a 19-item clinician-administered instrument designed to quantify the intensity of current conscious suicidal ideation in various dimensions of self-destructive thoughts or wishes: the extent of the wish to die, the desire to make an actual suicide attempt, and details of any plans; also, internal deterrents to an active attempt, and subjective feelings of control and/or courage regarding a proposed attempt. We will administer both the full and a short (5-item) version to assess rapid change in suicidal thinking. Scale scores are calculated by summing item scores and range from 0-38. Lower scores indicate less suicidal ideation and higher scores indicate escalating severity of suicidal thinking.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Columbia-Suicide Severity Rating Scale (C-SSRS)
The C-SSRS is a clinician-administered instrument designed to measures suicidal ideation/behaviors with both "Lifetime/Recent" and "Since Last Visit" versions. There are four subscales. Severity of ideation subscale is measured on a 5-point ordinal scale in which 1=wish to be dead, 2=nonspecific active suicidal thoughts, 3=suicidal thoughts with methods, 4=suicidal intent, and 5=suicidal intent with plan. The intensity of ideation subscale has 5 items: frequency, duration, controllability, deterrents, and reason for ideation, which is rated on a 5 point scale. The suicidal behavior subscale is rated on attempts, preparatory behavior, and nonsuicidal self-injury. The lethality subscale measures lethalities of actual attempts, which is rated on a 6 point scale.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Alcohol Urge Questionnaire (AUQ)
The AUQ is an 8-item self-report scale to assess acute alcohol cravings. It utilizes a 7 point Likert scale, and items are summed for a total scale score, where higher scores indicate greater cravings/urges to drink alcohol. This measure will be used to assess alcohol-related expectancies with both alcohol and ketamine.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Obsessive Compulsive Drinking Scale (OCDS)
The OCDS is a self-administered instrument that consists of 14 items that has been shown to be sensitive and specific for the obsessive and compulsive characteristics of alcohol misuse: drinking-related preoccupations, urges to drink, and the ability to desist these thoughts/urges. This measure will also be used to assess alcohol-related expectancies related to both alcohol and ketamine infusions. Items are rated on a 5 point Likert scale. Higher scores indicate more preoccupation, urges, or difficulty controlling urges to drink/consume alcohol.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Brief Psychiatric Rating Scale (BPRS)
The BPRS is a clinician-administered instrument with 4 key items will be used as an index of positive symptoms of schizophrenia. These 4 key positive domains are conceptual disorganization, hallucinatory behavior, suspiciousness and unusual thought content. 3 additional BPRS items - blunted affect, emotional withdrawal and motor retardation - are selected as a measure of negative schizophrenia symptoms. Each item is scored on a 7 point Likert scale, with 1 indicating absence of a given symptom and 7 indicating highest measured severity. Individual item are added to form a total scale score.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Visual Analog Scale (VAS)
The VAS is a 7-item self-administered Likert-type measure with individual items scored between 0-10. This instrument rates 7 domains: happy/euphoric, restless, sad, anxious, irritated/angry, drowsy and alert. A score of 0 is described as "none", 1-3 is "mild", 4-6 is "moderate", 7-9 is "marked" and 10 is "extreme" for each given item.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Clinician-Administered Dissociative States Scale (CADSS)
The CADSS is a measure of perceptual, behavioral and attentional changes occurring during dissociative experiences that has been tested in healthy subjects and post-traumatic stress disorder (PTSD). This scale involves 19 self-reported questions and 8 observer ratings scored from 0 (not at all) - 4 (extremely). Greater scores indicate greater ketamine-induced dissociation.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Clinical Global Impression/Severity (CGI)
The CGI is a clinician-measured scale of 3 items: Severity of Illness (item 1), Global Improvement (item 2), and Efficacy Index (item 3). Items 1 and 2 are rated on a 7-point Likert scale (1=normal, 7=among the most extremely ill patients) with a possible response of "not assessed." Item 3 is rated on a 4-point Likert scale from "none" to "outweighs therapeutic effect." Items 1 and 3 are assessed in relation to last clinical encounter (if possible).
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
Modified Version of the NIMH Data Safety Event Codes (NIMH-DSEC)
This clinician-collected form collects information over 100 symptoms/signs across multiple organ systems. The "Specific" form is for tracking side effects that are often seen during the infusion at multiple time points. The "Regular" form is for the baseline (-60 minutes), +230 minute post-ketamine infusion (final time point on the day of ketamine infusion) and other daily time points post-ketamine infusion.
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
The Positive and Negative Affect Schedule (PANAS)
The PANAS is a self-report questionnaire comprised of 2 mood scales, one that measures positive affect and one that measures negative affect. Used as a psychometric scale, the PANAS can show relations between positive and negative affect with personality states and traits. 10 descriptors are used for each positive and negative affect scale to define their meanings. Participants are asked to respond to a 20-item test, and each individual item is scored on a a 5-point Likert scale that ranges from very slightly or not at all (1) to extremely (5).
Time frame: Pre-ketamine (baseline) to one week post-ketamine infusion
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