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Audrey F, Alexis F, Sonia L, Sandra D, Luc B, Bellande T, Sophie L, Christophe J, Martine G, Caroline J, Pauline G, Benjamin D, Erwan B, Ronald M, Philippe H, Romina AB. Functional and neuropathological changes induced by injection of distinct alpha-synuclein strains: A pilot study in non-human primates. Neurobiol Dis 2023; 180:106086. [PMID: 36933673 DOI: 10.1016/j.nbd.2023.106086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023] Open
Abstract
The role of alpha-synuclein in Parkinson's disease has been heavily investigated since its discovery as a component of Lewy bodies. Recent rodent data demonstrate that alpha-synuclein strain structure is critical for differential propagation and toxicity. Based on these findings, we have compared, for the first time, in this pilot study, the capacity of two alpha-synuclein strains and patient-derived Lewy body extracts to model synucleinopathies after intra-putaminal injection in the non-human primate brain. Functional alterations triggered by these injections were evaluated in vivo using glucose positron emission tomography imaging. Post-mortem immunohistochemical and biochemical analyses were used to detect neuropathological alterations in the dopaminergic system and alpha-synuclein pathology propagation. In vivo results revealed a decrease in glucose metabolism more pronounced in alpha-synuclein strain-injected animals. Histology showed a decreased number of dopaminergic tyrosine hydroxylase-positive cells in the substantia nigra to different extents according to the inoculum used. Biochemistry revealed that alpha-synuclein-induced aggregation, phosphorylation, and propagation in different brain regions are strain-specific. Our findings show that distinct alpha-synuclein strains can induce specific patterns of synucleinopathy in the non-human primate, changes in the nigrostriatal pathway, and functional alterations that resemble early-stage Parkinson's disease.
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Affiliation(s)
- Fayard Audrey
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France.
| | - Fenyi Alexis
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Lavisse Sonia
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Dovero Sandra
- Univ. de Bordeaux, CNRS, IMN, UMR 5293, Bordeaux F-33000, France
| | - Bousset Luc
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Tracy Bellande
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Lecourtois Sophie
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Jouy Christophe
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Guillermier Martine
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Jan Caroline
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Gipchtein Pauline
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Dehay Benjamin
- Univ. de Bordeaux, CNRS, IMN, UMR 5293, Bordeaux F-33000, France
| | - Bezard Erwan
- Univ. de Bordeaux, CNRS, IMN, UMR 5293, Bordeaux F-33000, France
| | - Melki Ronald
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Hantraye Philippe
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
| | - Aron Badin Romina
- CEA, CNRS, Université Paris-Saclay, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-Aux-Roses 92260, France
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