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R1441C and G2019S LRRK2 knockin mice have distinct striatal molecular, physiological, and behavioral alterations
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Abstract
LRRK2 mutations are closely associated with Parkinson’s disease (PD). Convergent evidence suggests that LRRK2 regulates striatal function. Here, by using knock-in mouse lines expressing the two most common LRRK2 pathogenic mutations—G2019S and R1441C—we investigated how LRRK2 mutations altered striatal physiology. While we found that both R1441C and G2019S mice displayed reduced nigrostriatal dopamine release, hypoexcitability in indirect-pathway striatal projection neurons, and alterations associated with an impaired striatal-dependent motor learning were observed only in the R1441C mice. We also showed that increased synaptic PKA activities in the R1441C and not G2019S mice underlie the specific alterations in motor learning deficits in the R1441C mice. In summary, our data argue that LRRK2 mutations’ impact on the striatum cannot be simply generalized. Instead, alterations in electrochemical, electrophysiological, molecular, and behavioral levels were distinct between LRRK2 mutations. Our findings offer mechanistic insights for devising and optimizing treatment strategies for PD patients.
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“Multiple studies point to a role for LRRK2 at the presynaptic terminal where it plays a role in release of dopamine from striato-nigral neurons, and glutamate from corticostriatal neurons [5, 6, 11, 50, 86, 92, 95].”
From Cellular and subcellular localization of Rab10 and phospho-T73 Rab10 in the mouse and human brain (2023) · cites this paper as [92]
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Sorted by citations
Cellular and subcellular localization of Rab10 and phospho-T73 Rab10 in the mouse and human brain
Singh, V., Menard, M. A., Serrano, G. E., Beach, T. G., Zhao, H. T., Riley-DiPaolo, A., Subrahmanian, N., LaVoie, M. J., & Volpicelli-Daley, L. A. (2023) · Acta Neuropathologica Communications · doi:10.1186/s40478-023-01704-9 · Cited by 9
Metadata
- Authors
- Xenias, H. S., Chen, C., Kang, S., Cherian, S., Situ, X., Shanmugasundaram, B., Liu, G., Scesa, G., Chan, C. S., & Parisiadou, L.
- Venue
- Communications Biology
- Published
- 2022-11-10
- Volume
- 5
- Issue
- 1
- ISSN
- 2399-3642
- PMC
- PMC9649688
- Cited by
- 32
- References
- 8
- Language
- en
- Funders
- U.S. Department of Health & Human Services | National Institutes of Health (R01 NS097901)
- Michael J. Fox Foundation for Parkinson’s Research (020600)
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