Abstract
Deep brain stimulation (DBS) has been tentatively explored to promote motor recovery after stroke. Stroke could transiently activate endogenous self-repair processes, including neurogenesis in the subventricular zone (SVZ). In this regard, it is of considerable clinical interest to study whether DBS of the lateral cerebellar nucleus (LCN) could promote neurogenesis in the SVZ for functional recovery after stroke. In the present study, rats were trained on the pasta matrix reaching task and the ladder rung walking task before surgery. And then an electrode was implanted in the LCN following cortical ischemia induced by endothelin-1 injection. After 1 week of recovery, LCN DBS coupled with motor training for two weeks promoted motor function recovery, and reduced the infarct volumes post-ischemia. LCN DBS augmented poststroke neurogenetic responses, characterized by proliferation of neural progenitor cells (NPCs) and neuroblasts in the SVZ and subsequent differentiation into neurons in the ischemic penumbra at 21 days poststroke. DBS with the same stimulus parameters at 1 month after ischemia could also increase nascent neuroblasts in the SVZ and newly matured neurons in the perilesional cortex at 42 days poststroke. These results suggest that LCN DBS promotes endogenous neurogenesis for neurorestoration after cortical ischemia.
Highlights
Deep brain stimulation (DBS) has been tentatively explored to promote motor recovery after stroke
Analysis of the spatial pattern from pasta matrix revealed that animals receiving lateral cerebellar nucleus (LCN) DBS obtained more pasta pieces that were located further anteriorly and laterally than did the ET-1 group (Fig. 1d)
The results described above suggest that the motor function of impaired forelimbs can be improved by LCN DBS coupled with motor rehabilitation after 1 week of recovery
Summary
Deep brain stimulation (DBS) has been tentatively explored to promote motor recovery after stroke. Stroke could transiently activate endogenous self-repair processes, including neurogenesis in the subventricular zone (SVZ) In this regard, it is of considerable clinical interest to study whether DBS of the lateral cerebellar nucleus (LCN) could promote neurogenesis in the SVZ for functional recovery after stroke. DBS with the same stimulus parameters at 1 month after ischemia could increase nascent neuroblasts in the SVZ and newly matured neurons in the perilesional cortex at 42 days poststroke These results suggest that LCN DBS promotes endogenous neurogenesis for neurorestoration after cortical ischemia. Most DBS treatments for poststroke disorders have focused on neuropathic pain, but only a handful of case reports exist on in the utility of DBS for treating motor d eficits[5,6] These limited data do at least suggest that DBS may improve motor function following stroke. In the present study, we examine whether LCN DBS regulates neurogenesis in the ipsilesional and contralesional SVZ and whether it influences subsequent differentiation into neurons in perilesional cortex
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