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Mechanistic study of the inhibitory activity of Geum urbanum extract against α-Synuclein fibrillationстатья
- Авторы: Lobbens E.S., Breydo L., Skamris T., Vestergaard B., Jäger A.K., Jorgensen L., Uversky V., van de Weert M.
- Журнал: Biochimica et biophysica acta
- Том: 1864
- Номер: 9
- Год издания: 2016
- Издательство: Elsevier Pub. Co.
- Местоположение издательства: Amsterdam, Netherlands
- Первая страница: 1160
- Последняя страница: 1169
- Аннотация: The presence of Lewy bodies and Lewy neurites is a major pathological hallmark of Parkinson’s disease and is hypothesized to be linked to disease development, although this is not yet conclusive. Lewy bodies and Lewy neurites primarily consist of fibrillated α-Synuclein; yet, there is no treatment available targeting stabilization of α-Synuclein in its native state. The aim of the present study was to investigate the inhibitory activity of an ethanolic extract of Geum urbanum against α-Synuclein fibrillation and examine the structural changes of α-Synuclein in the presence of the extract. The anti-fibrillation and anti-aggregation activities of the plant extract were monitored by thioflavin T fibrillation assays and size exclusion chromatography, while structural changes were followed by circular dichroism, Fourier transform infrared spectroscopy, intrinsic fluorescence, small angle X-ray scattering and electron microscopy. Since the extract is a complex mixture, structure-function relationships could not be determined. Under the experimental conditions investigated, Geum urbanum was found to inhibit α-Synuclein fibrillation in a concentration dependent way, and to partly disintegrate preformed α-Synuclein fibrils. Based on the structural changes of α-Synuclein in the presence of extract, we propose that Geum urbanum delays α-Synuclein fibrillation either by reducing the fibrillation ability of one or more of the aggregation prone intermediates or by directing α-Synuclein aggregation towards a non-fibrillar state. However, whether these alterations of the fibrillation pathway lead to less pathogenic species is yet to be determined.
- Добавил в систему: Уверский Владимир Николаевич