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de Araujo Lima V, Esquinelato R, Carmo-Gonçalves P, do Nascimento LA, Lee H, Eliezer D, Romão L, Follmer C. The dopamine receptor agonist apomorphine stabilizes neurotoxic α-synuclein oligomers. FEBS Lett 2022; 596:309-322. [PMID: 34928512 PMCID: PMC8972942 DOI: 10.1002/1873-3468.14263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/13/2021] [Accepted: 12/10/2021] [Indexed: 02/03/2023]
Abstract
The misfolding and aggregation of the protein α-synuclein (aSyn) into potentially neurotoxic oligomers is believed to play a pivotal role in the neuropathogenesis of Parkinson's disease (PD). Herein, we explore how apomorphine (Apo), a nonselective dopamine D1 and D2 receptor agonist utilized in the therapy for PD, affects the aggregation and toxicity of aSyn in vitro. Our data indicated that Apo inhibits aSyn fibrillation leading to the formation of large oligomeric species (Apo-aSyn-O), which exhibit remarkable toxicity in mesencephalic dopaminergic neurons in primary cultures. Interestingly, purified Apo-aSyn-O, even at very low concentrations, seems to be capable of converting unmodified aSyn monomer into neurotoxic species. Collectively, our findings warn for a possible dangerous effect of Apo on aSyn misfolding/aggregation pathway.
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Affiliation(s)
- Vanderlei de Araujo Lima
- Department of Physical Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil,Graduate Program in Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil
| | - Rodrigo Esquinelato
- Department of Physical Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil
| | - Phelippe Carmo-Gonçalves
- Department of Physical Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil,Graduate Program in Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil
| | - Lucas Alex do Nascimento
- Department of Physical Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil
| | - Hudson Lee
- Department of Biochemistry, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA
| | - David Eliezer
- Department of Biochemistry, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA
| | - Luciana Romão
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-902 Brazil
| | - Cristian Follmer
- Department of Physical Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil,Graduate Program in Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil
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