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Deep brain stimulation (DBS) for treatment-resistant depression showed safety and feasibility but lacked statistically significant antidepressant efficacy in a 6-month sham-controlled trial. Further research is needed to optimize DBS for depression.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Devices

Background:

  • Chronic, unremitting depression poses a significant challenge in treatment.
  • Deep brain stimulation (DBS) targeting the subcallosal cingulate white matter is a potential intervention for severe depression.

Purpose of the Study:

  • To evaluate the safety and efficacy of subcallosal cingulate DBS for treatment-resistant depression.
  • To compare active DBS with sham stimulation in a randomized, controlled trial.

Main Methods:

  • A prospective, randomized, sham-controlled trial involving 90 participants with treatment-resistant depression.
  • Participants received bilateral subcallosal cingulate DBS, randomized to active or sham stimulation for 6 months, followed by open-label active DBS.
  • Primary outcome was response rate (≥40% depression severity reduction) during months 4-6.

Main Results:

  • No statistically significant difference in response rates between active (20%) and sham (17%) DBS groups during the double-blind phase.
  • Serious adverse events were reported, with some related to the device or surgery.
  • The study confirmed safety and feasibility but not statistically significant antidepressant efficacy.

Conclusions:

  • Subcallosal cingulate DBS is safe and feasible for treatment-resistant depression.
  • The 6-month sham-controlled trial did not demonstrate statistically significant antidepressant efficacy.
  • Future research should explore factors like electrode placement and patient selection to enhance DBS efficacy for depression.