From bed to bench side: Reverse translation to optimize neuromodulation for mood disorders

Area of Science:

• Neuroscience
• Psychiatry
• Neuromodulation

Background:

• Neuroimaging studies have localized limbic system dysfunction in major depression.
• Circuit modulation therapies, like deep brain stimulation (DBS), have emerged to treat depression.
• Current neuromodulation refinement is slow due to unanswered questions about mechanisms of action.

Purpose of the Study:

• To argue for the necessity of reverse translation to nonhuman primate models for advancing neuromodulation therapies.
• To examine brain targets, efficacy, and refinement strategies for deep brain stimulation (DBS) in human depression.
• To identify knowledge gaps hindering progress in developing effective treatments for treatment-resistant depression.

Main Methods:

• Review of human neuroimaging and neuromodulation studies for major depression.
• Analysis of targeted brain regions and efficacy of deep brain stimulation (DBS).
• Justification for the use of nonhuman primates as a translational model.

Main Results:

• Specific limbic system regions are consistently targeted in human neuromodulation for depression.
• Deep brain stimulation (DBS) shows promise but requires further mechanistic understanding.
• Nonhuman primates offer a suitable model for refining DBS and understanding its action.

Conclusions:

• Reverse translation to nonhuman primates is essential for optimizing neuromodulation therapies for depression.
• Further research in animal models is needed to fill knowledge gaps.
• This approach will accelerate the development of effective treatments for patients with treatment-resistant depression.