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• W1966932072 abstract "The electrophysiological properties of substantia nigra pars compacta (SNC) dopamine neurons can influence their susceptibility to degeneration in toxin-based models of Parkinson's disease (PD), suggesting that excitotoxic and/or hypoactive mechanisms may be engaged during the early stages of the disease. It is unclear, however, whether the electrophysiological properties of SNC dopamine neurons are affected by genetic susceptibility to PD. Here we show that deletion of PD-associated genes, PINK1 or HtrA2/Omi, leads to a functional reduction in the activity of small-conductance Ca 2+ -activated potassium channels. This reduction causes SNC dopamine neurons to fire action potentials in an irregular pattern and enhances burst firing in brain slices and in vivo. In contrast, PINK1 deletion does not affect firing regularity in ventral tegmental area dopamine neurons or substantia nigra pars reticulata GABAergic neurons. These findings suggest that changes in SNC dopamine neuron excitability may play a role in their selective vulnerability in PD." @default.
• W1966932072 created "2016-06-24" @default.
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• W1966932072 date "2010-12-01" @default.
• W1966932072 modified "2023-10-02" @default.
• W1966932072 title "Hyperexcitable Substantia Nigra Dopamine Neurons in<i>PINK1</i>- and<i>HtrA2/Omi</i>-Deficient Mice" @default.
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• W1966932072 doi "https://doi.org/10.1152/jn.00466.2010" @default.
• W1966932072 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3007632" @default.
• W1966932072 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20926611" @default.
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