The purpose of this study is to assess whether the antidepressant effect from intravenous (IV) ketamine treatment can be maintained by minocycline compared to placebo after IV ketamine treatment is stopped.
This is a placebo-controlled (i.e., an inactive substance that is compared with a drug to test whether the drug has a real effect in a clinical trial), double-blind (neither physician nor patient knows the treatment that the patient receives) randomized (the drug is assigned by chance) study in patients with Major Depressive Disorder (MDD) and Bipolar Disorder Type II. The study is designed to assess whether the antidepressant response to treatment with intravenous (IV) ketamine can be maintained by treatment with minocycline in patients with MDD and Bipolar Depression Type II (compared to placebo). Both hospitalized patients as well as patients being treated as an outpatient for their current episode of depression can qualify for participation in this study. The study has four sequential phases: if eligibility for the study has been confirmed during the 21-day screening phase, the patients will enter a 12-day open-label (ie, patient and physician know the intervention that is being administered) treatment phase during which the patient will receive 6 open-label IV infusions of 0.5 mg/kg ketamine on Day 1, 3, 5, 8, 10 and 12 in combination with open-label minocycline, orally administered twice daily. All patients will remain at the study site for at least 4 hours after the IV ketamine administrations. Response to treatment will be assessed using the Montgomery-Asberg Depression Rating Scale (MADRS) which is designed to measure the overall severity of depressive symptoms. Patients responding to ketamine/minocycline treatment will be randomized to receive minocycline or placebo for 6 weeks during a 6-week blinded treatment phase or until relapse. A patient will be defined as a "ketamine responder" if there is a 50% or more decrease in comparison to baseline values (Day 1 predose) in the MADRS total score performed at 3 to 4 hours postdose on Days 8, 10, or 12, with a 40% or more decrease from baseline in the MADRS total score on Day 12. Patients not responding to treatment with ketamine/minocycline will be given the option to receive 100 mg minocycline twice daily as open-label treatment for a maximum of 6 weeks. The patients (both responders and non-responders) will have weekly visits following last dose of ketamine until Day 54 (responders/non-responders) or until relapse (responders) whichever comes first, to determine the duration of the antidepressant effect and to assess safety and tolerability after completion of treatment. Upon completion of the study (Day 54) or at time of relapse all patients will have an end-of-study visit. All patients can return to standard of care treatment at the end of the study. The total study duration for each patient will be maximally 11 weeks.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
29
In the 12-day open-label treatment phase, patients will self administer oral minocycline 200 mg on Day 1, 100 mg twice daily on Days 2 to 11, and 100 mg on the morning of Day 12. In the 6-week blinded treatment phase, responders may self administer oral minocycline 100 mg twice daily from the evening of Day 12 for up to 6 weeks (Day 54), or until relapse, whichever comes first. In the 6-week open-label treatment phase, non-responders may self administer oral minocycline 100 mg twice daily from the evening of Day 12 for up to 6 weeks (Day 54).
Patients in the 6-week blinded treatment phase, may self administer placebo twice daily from the evening of Day 12 for up to 6 weeks (Day 54), or until relapse, whichever comes first.
In the 12-day open-label treatment phase, all patients will receive 1 IV infusion of 0.5 mg/kg ketamine over 40 minutes on Days 1, 3, 5, 8, 10 and 12.
Unnamed facility
Duffel, Belgium
Unnamed facility
Lede, Belgium
Unnamed facility
Leuven, Belgium
Unnamed facility
Besançon, France
Proportion of patients (among responders) who survive relapse-free
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition. Relapse is defined as MADRS ≥ 30.
Time frame: Day 54
Change in MADRS total score among non-responders from pre-randomization to end-of-study
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition.
Time frame: From Day 12 to Day 54
Change in the MADRS total score from baseline during IV ketamine treatment phase
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition.
Time frame: Days 1, 3, 5, 8, 10 and 12
Change in the MADRS total score from baseline after IV ketamine treatment phase
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition.
Time frame: Days 1, 20, 27, 34, 41, 48, and 54
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Unnamed facility
Clermont-Ferrand, France
Unnamed facility
Nîmes, France
Unnamed facility
Leiden, Netherlands
Unnamed facility
Alicante, Spain
Unnamed facility
Barcelona, Spain
Unnamed facility
Coslada, Spain
...and 2 more locations
Response (reduction ≥ 50% in MADRS total score relative to baseline) rate during IV ketamine treatment phase
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition.
Time frame: Days 1, 3, 5, 8, 10, and 12
Time to relapse (among responders) following completion of the IV ketamine infusion schedule and after first dose of minocycline/placebo
The Montgomery-Asberg Depression Rating Scale (MADRS) measures depression severity and detects changes due to antidepressant treatment. The test consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total score of 60. Higher scores represent a more severe condition. Relapse is defined as MADRS ≥ 30.
Time frame: From Day 12 to Day 54
Change in C-SSRS from baseline to any time in the study
The Columbia Suicide Severity Rating Scale (C-SSRS) is a clinical interview to assess severity and track suicidal events providing a summary of both suicidal ideation and behavior to identify the level and type of suicidality present.
Time frame: Days 1, 12, and 54