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Pathway-specific dysregulation of striatal excitatory synapses by LRRK2 mutations
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Abstract
LRRK2 is a kinase expressed in striatal spiny projection neurons (SPNs), cells which lose dopaminergic input in Parkinson’s disease (PD). R1441C and G2019S are the most common pathogenic mutations of LRRK2. How these mutations alter the structure and function of individual synapses on direct and indirect pathway SPNs is unknown and may reveal pre-clinical changes in dopamine-recipient neurons that predispose toward disease. Here, R1441C and G2019S knock-in mice enabled thorough evaluation of dendritic spines and synapses on pathway-identified SPNs. Biochemical synaptic preparations and super-resolution imaging revealed increased levels and altered organization of glutamatergic AMPA receptors in LRRK2 mutants. Relatedly, decreased frequency of miniature excitatory post-synaptic currents accompanied changes in dendritic spine nano-architecture, and single-synapse currents, evaluated using two-photon glutamate uncaging. Overall, LRRK2 mutations reshaped synaptic structure and function, an effect exaggerated in R1441C dSPNs. These data open the possibility of new neuroprotective therapies aimed at SPN synapse function, prior to disease onset.
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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 [11]
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Cites
Regulation of parkinsonian motor behaviours by optogenetic control of basal ganglia circuitry
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Saunders, A., Macosko, E. Z., Wysoker, A., Goldman, M., Krienen, F. M., de Rivera, H., Bien, E., Baum, M., Bortolin, L., Wang, S., et al. (2018) · Cell · doi:10.1016/j.cell.2018.07.028 · Cited by 1,531
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Day, M., Wang, Z., Ding, J., An, X., Ingham, C. A., Shering, A. F., Wokosin, D., Ilijic, E., Sun, Z., Sampson, A. R., et al. (2006) · Nature Neuroscience · doi:10.1038/nn1632 · Cited by 745 · cited 1×
“While there is evidence that at first iSPNs show the primary structural and functional synaptic and dendritic changes in response to dopamine loss (Gerfen, 2006; Gertler et al., 2008; Day et al., 2006; Villalba et al., 2009), with time both SPNs types undergo substantial adaptations (Suarez et al.”
BackgroundGenetics in Parkinson disease: Mendelian versus non‐Mendelian inheritance
Hernandez, D. G., Reed, X., & Singleton, A. B. (2016) · Journal of Neurochemistry · doi:10.1111/jnc.13593 · Cited by 448 · cited 1×
“By studying RC and GS KI mouse lines side by side, we were able to demonstrate that the two most common LRRK2 gain-of-function pathogenic mutations (Hernandez et al., 2016) alter the function of SPN excitatory synapses in largely similar ways, with several potentially important differences.”
BackgroundRecurrent network activity drives striatal synaptogenesis
Kozorovitskiy, Y., Saunders, A., Johnson, C. A., Lowell, B. B., & Sabatini, B. L. (2012) · Nature · doi:10.1038/nature11052 · Cited by 176
Self-citationDopaminergic modulation of striatal function and Parkinson’s disease
Zhai, S., Shen, W., Graves, S. M., & Surmeier, D. J. (2019) · Journal of Neural Transmission · doi:10.1007/s00702-019-01997-y · Cited by 100
Oxytocin functions as a spatiotemporal filter for excitatory synaptic inputs to VTA dopamine neurons
Xiao, L., Priest, M. F., & Kozorovitskiy, Y. (2018) · eLife · doi:10.7554/elife.33892 · Cited by 83 · cited 2×
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Khan, S. S., Sobu, Y., Dhekne, H. S., Tonelli, F., Berndsen, K., Alessi, D. R., & Pfeffer, S. R. (2021) · eLife · doi:10.7554/elife.67900 · Cited by 93
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
- Chen, C., Soto, G., Dumrongprechachan, V., Bannon, N., Kang, S., Kozorovitskiy, Y., & Parisiadou, L.
- Venue
- eLife
- Publisher
- eLife Sciences Publications, Ltd
- Published
- 2020-10-02
- Volume
- 9
- ISSN
- 2050-084X
- PMC
- PMC7609054
- Cited by
- 56
- References
- 8
- Language
- en
- Licence
- Funders
- National Institute of Neurological Disorders and Stroke (R01NS097901, R01NS107539, F32NS103243)
- Michael J. Fox Foundation for Parkinson's Research (LRRK2 Challenge)
- Rita Allen Foundation (Rita Allen Scholar Award)
- Kinship Foundation (Searle Scholar Award)
- Arnold and Mabel Beckman Foundation (Beckman Young Investigator Award)
- American Heart Association (19PRE3438005)
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