期刊
BIOLOGICAL PSYCHIATRY
卷 55, 期 5, 页码 472-476出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.biopsych.2003.11.022
关键词
brain-derived neurotrophic factor; electroconvulsive therapy; long-term potentiation; mood disorder; neostriatum; synaptic plasticity
资金
- NIMH NIH HHS [MH01680] Funding Source: Medline
- NINDS NIH HHS [NS47700] Funding Source: Medline
Background: Increasing and consistent findings of structural and functional abnormalities in patients with mood disorders demonstrate a clear involvement of the neostriatum. Therefore, the beneficial effect of electroconvulsive stimulation (ECS) treatment of acute state of mood disorder may relate to changes in striatal synaptic plasticity. Methods: We studied the effect of ECS treatment on the reported long-term depression (LTD) of synaptic excitatory afferents to striatal medium spiny neurons, Stimulation of the white matter between the cortex and the striatum elicited excitatory postsynaptic potentials (EPSPS) in medium spiny neurons in rat corticostriatal slices while recording using the whole-cell patch-clamp technique. Results: The EPSPs evoked in striatal neurons undergo LTD with repeated stimulation trains, and LTD of this pathway is impaired in rats after ECS treatment for 1 week, similar to what is reported in chronic lithium treatment. Electroconvulsive stimulation did not affect intrinsic membrane properties or the occurrence of spontaneous EPSCs. Dose-dependent inhibition of the EPSPs by a nonselective agonist of metabotropic glutamate receptor did not change in rats after ECS treatment. Conclusions: Our data suggest that the effectiveness of electroconvulsive therapy in mood disorders may be a consequence of LTD impairment of excitatory cortical afferents to striatal projecting neurons.
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