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dc.contributor.authorVijayakumaran, Shamini
dc.contributor.authorNakamura, Yasuko
dc.contributor.authorHenley, Jeremy M
dc.contributor.authorPountney, Dean L
dc.date.accessioned2019-10-30T03:54:35Z
dc.date.available2019-10-30T03:54:35Z
dc.date.issued2019
dc.identifier.issn1044-7431
dc.identifier.doi10.1016/j.mcn.2019.103416
dc.identifier.urihttp://hdl.handle.net/10072/388758
dc.description.abstractThe accumulation of intracytoplasmic inclusion bodies (Lewy bodies) composed of aggregates of the alpha-synuclein (α-syn) protein is the principal pathological characteristic of Parkinson's disease (PD) and may lead to degeneration of dopaminergic neurons. To date there is no medication that can promote the efficient clearance of these pathological aggregates. In this study, the effect on α-syn aggregate clearance of ginkgolic acid (GA), a natural compound extracted from Ginkgo biloba leaves that inhibits SUMOylation amongst other pathways, was assessed in SH-SY5Y neuroblastoma cells and rat primary cortical neurons. Depolarization of SH-SY5Y neuroblastoma cells and rat primary cortical neurons with KCl was used to induce α-syn aggregate formation. Cells pre-treated with either GA or the related compound, anacardic acid, revealed a significant decrease in intracytoplasmic aggregates immunopositive for α-syn and SUMO-1. An increased frequency of autophagosomes was also detected with both compounds. GA post-treatment 24 h after depolarization also significantly diminished α-syn aggregate bearing cells, indicating the clearance of pre-formed aggregates. Autophagy inhibitors blocked GA-dependent clearance of α-syn aggregates, but not increased autophagosome frequency. Western analysis revealed that the reduction in α-syn aggregate frequency obtained with GA pre-treatment was not accompanied by a significant change in the abundance of SUMO conjugates. The current findings show that GA can promote autophagy-dependent clearance of α-syn aggregates and may have potential in disease modifying therapy.
dc.languageEnglish
dc.publisherElsevier BV
dc.relation.ispartofjournalMolecular and Cellular Neuroscience
dc.subject.fieldofresearchNeurosciences
dc.subject.fieldofresearchCognitive Sciences
dc.subject.fieldofresearchPsychology
dc.subject.fieldofresearchcode1109
dc.subject.fieldofresearchcode1702
dc.subject.fieldofresearchcode1701
dc.titleGinkgolic acid promotes autophagy-dependent clearance of intracellular alpha-synuclein aggregates
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationVijayakumaran, S; Nakamura, Y; Henley, JM; Pountney, DL, Ginkgolic acid promotes autophagy-dependent clearance of intracellular alpha-synuclein aggregates, Molecular and Cellular Neuroscience, 2019, pp. 103416-103416
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2019-10-23T15:06:01Z
dc.description.versionPost-print
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorVijayakumaran, Shamini
gro.griffith.authorPountney, Dean L.


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