BACKGROUND: Major depressive disorder (MDD) is a major public health problem in adolescents. Unfortunately, there are no effectively targeted treatment options for this age group. Current remedies are limited in their effectiveness in youth with response and remission rates no greater than 60 to 30% respectively and treatment effects are not sustained throughout the life cycle. Further, ongoing controversies persist regarding the safety of antidepressants in youth. Current interventions were developed to solely target the symptoms of rather than the underlying neurobiology. Most importantly, there is no way to accurately predict an individual patient's response to interventions. Consequently, there is a critical need for optimally targeted interventions that directly address the relevant pathophysiology of depression.