Minocycline as Adjunctive Treatment for Treatment Resistant Depression

  • STATUS
    Recruiting
  • End date
    Aug 20, 2022
  • participants needed
    100
  • sponsor
    Centre for Addiction and Mental Health
Updated on 22 August 2021
duloxetine
adjunctive treatment
antibiotic
psychosis
mirtazapine
depressive disorder
antidepressants
depressive symptoms
depressive episode
sertraline
venlafaxine
citalopram
bupropion
a 12

Summary

Major depressive disorder (MDD) is a leading cause of disability worldwide. Up to 50% of patients experience treatment resistant depression (TRD), which accounts for a vast majority of disease burden. Current medications for TRD have limited efficacy and can be associated with intolerable side effects. Therefore, there is a need for finding new treatment targets. Accumulating evidence suggests some patients with MDD including those with TRD, display brain inflammation. Thus, patients with TRD may benefit from medications that can reduce this inflammation. Minocycline is an antibiotic which can cross the blood-brain barrier and has effects on several systems implicated in depression. The principal investigator led the first pilot study of minocycline as an add-on treatment in TRD demonstrating that it led to a significant reduction in depressive symptoms compared to placebo and these findings require replication in a larger sample to confirm the efficacy and tolerability of this treatment approach.

This study is a 12 week, double-blind, placebo-controlled trial of minocycline as add-on treatment for patients suffering from a major depressive episode who have failed to respond to at least two adequate trials of antidepressant treatment. After screening and randomization to the two parallel arms of the trial, 50 patients will receive minocycline added to treatment as usual (TAU) and 50 patients will receive placebo added to TAU. Clinical assessment will include the Hamilton Depression Rating Scale (HAMD-17), Clinical Global Impression scale (CGI), Patient Health Questionnaire (PHQ-9), and the Generalized Anxiety Disorder scale (GAD-7) at each study visit (screening, baseline, week 2, 6, and 12). Side effects checklists will be undertaken at each visit. Minocycline will be started at 100 mg once daily and will be increased to 100 mg twice daily at two weeks. Secondary outcomes include inflammatory biomarkers measured at baseline, weeks 6 and 12.

This trial will provide further evidence of minocycline's efficacy and acceptability as a treatment option for patients with TRD and provide insights into its mechanism of action.

Details
Condition Treatment Resistant Depression
Treatment Minocycline
Clinical Study IdentifierNCT03947827
SponsorCentre for Addiction and Mental Health
Last Modified on22 August 2021

Eligibility

Yes No Not Sure

Inclusion Criteria

outpatients
diagnosis of non-psychotic MDD
male or female 18-90 years old
currently taking one of the following antidepressants: Escitalopram, Citalopram, Sertraline, Venlafaxine, Duloxetine, Mirtazapine or Bupropion
on a medically acceptable form of birth control for women of childbearing age

Exclusion Criteria

intolerance to tetracyclines
treatment with anticoagulants, diuretics, retinoids, ergot alkaloids, antacids containing aluminium, calcium or magnesium, bismuth and zinc salts, quinapril
history of substance use
major unstable medical illness
pregnancy or intent to become pregnant
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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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