Major Depressive Disorder Clinical Trial
Official title:
Deep Brain Stimulation in Patients With Chronic Treatment Resistant Depression
Major depressive disorders are real public health issues in terms of diagnosis and treatment.
Some forms of depression are chronic and resistant to treatment (TRD). In these forms suicide
risk is important.
Patients with TRD are potential candidates for neurosurgical interventions to treat
depression. However, psychosurgery interventions based upon lesions, showed their limitations
related to 1. the large variability in neurosurgical gestures, 2. their side effects, and of
course 3. the irreversible damage caused by the surgery.
Thus, deep brain stimulation (DBS) could represent an opportunity for patients suffering from
TRD. Our preliminary study based upon the stimulation of the accumbens nucleus showed
encouraging results. The investigators have thus planned a randomized controlled trial versus
sham stimulation to confirm the therapeutic value of nucleus accumbens DBS.
Because of their recurrent nature, their prevalence and their consequences, major depressive
disorders are real public health issues in terms of diagnosis and treatment.
Some forms of depression are chronic and resistant to treatment (TRD), either unipolar
(repeated episodes of depression) or bipolar (repeated episodes of depression and manic
and/or hypomanic episodes). In these forms suicide risk is important.
Patients with TRD are potential candidates for neurosurgical interventions to treat
depression. The benefit of neurosurgical procedures is expected to be important in these
patients.
Psychosurgery interventions based upon lesions, however, showed their limitations related to
1/ the large variability in neurosurgical gestures, 2/ their side effects, and of course 3/
the irreversible damage caused by the surgery.
Current brain imaging data yielded fresh information about the pathophysiology of depression
and suggested new therapeutic approaches in TRD.
Modulation of sub-caudate specific pathways, which are part of orbitofrontal and anterior
cingulate cortico-subcortical loops should allow for a diminution of depressive symptoms.
The modulation of these specific pathways, initially targeted by classical neurosurgery,
could benefit from current developments in functional neurosurgery.
Deep brain stimulation (DBS) may represent an opportunity for patients suffering from TRD.
Our preliminary study based upon the stimulation of the accumbens nucleus showed encouraging
results. The investigators have thus planned a randomized controlled trial versus sham
stimulation to confirm the therapeutic value of nucleus accumbens DBS.
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