Medial forebrain bundle DBS differentially modulates dopamine release in the nucleus accumbens in a rodent model of depression
| Autor: | Volker A. Coenen, Yixin Tong, Danesh Ashouri Vajari, Máté D. Döbrössy, Chockalingam Ramanathan, Thomas Stieglitz |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Deep brain stimulation Deep Brain Stimulation Dopamine medicine.medical_treatment Fast-scan cyclic voltammetry Stimulation Nucleus accumbens Nucleus Accumbens Rats Sprague-Dawley 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Developmental Neuroscience medicine Animals Medial forebrain bundle Neurotransmitter Depression business.industry Medial Forebrain Bundle medicine.disease Rats Disease Models Animal 030104 developmental biology Neurology chemistry Female business Neuroscience Treatment-resistant depression 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Experimental Neurology. 327:113224 |
| ISSN: | 0014-4886 |
| DOI: | 10.1016/j.expneurol.2020.113224 |
| Popis: | Background Medial forebrain bundle (MFB) deep brain stimulation (DBS) has anti-depressant effects clinically and in depression models. Currently, therapeutic mechanisms of MFB DBS or how stimulation parameters acutely impact neurotransmitter release, particularly dopamine, are unknown. Experimentally, MFB DBS has been shown to evoke dopamine response in healthy controls, but not yet in a rodent model of depression. Objective The study investigated the impact of clinically used stimulation parameters on the dopamine induced response in a validated rodent depression model and in healthy controls. Method The stimulation-induced dopamine response in Flinders Sensitive Line (FSL, n = 6) rat model of depression was compared with Sprague Dawley (SD, n = 6) rats following MFB DSB, using Fast Scan Cyclic Voltammetry to assess the induced response in the nucleus accumbens. Stimulation parameters were 130 Hz (“clinically” relevant) with pulse widths between 100 and 350 μs. Results Linear mixed model analysis showed significant impact in both models following MFB DBS both at 130 and 60 Hz with 100 μs pulse width in inducing dopamine response. Furthermore, at 130 Hz the evoked dopamine responses were different across the groups at the different pulse widths. Conclusion The differential impact of MFB DBS on the induced dopamine response, including different response patterns at given pulse widths, is suggestive of physiological and anatomical divergence in the MFB in the pathological and healthy state. Studying how varying stimulation parameters affect the physiological outcome will promote a better understanding of the biological substrate of the disease and the possible anti-depressant mechanisms at play in clinical MFB DBS. |
| Databáze: | OpenAIRE |
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