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2016 ; 17
(8
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Oleuropein Prevents Neuronal Death, Mitigates Mitochondrial Superoxide Production
and Modulates Autophagy in a Dopaminergic Cellular Model
#MMPMID27517912
Achour I
; Arel-Dubeau AM
; Renaud J
; Legrand M
; Attard E
; Germain M
; Martinoli MG
Int J Mol Sci
2016[Aug]; 17
(8
): ä PMID27517912
show ga
Parkinson's disease (PD) is a progressive neurodegenerative disorder, primarily
affecting dopaminergic neurons in the substantia nigra. There is currently no
cure for PD and present medications aim to alleviate clinical symptoms, thus
prevention remains the ideal strategy to reduce the prevalence of this disease.
The goal of this study was to investigate whether oleuropein (OLE), the major
phenolic compound in olive derivatives, may prevent neuronal degeneration in a
cellular dopaminergic model of PD, differentiated PC12 cells exposed to the
potent parkinsonian toxin 6-hydroxydopamine (6-OHDA). We also investigated OLE's
ability to mitigate mitochondrial oxidative stress and modulate the autophagic
flux. Our results obtained by measuring cytotoxicity and apoptotic events
demonstrate that OLE significantly decreases neuronal death. OLE could also
reduce mitochondrial production of reactive oxygen species resulting from
blocking superoxide dismutase activity. Moreover, quantification of autophagic
and acidic vesicles in the cytoplasm alongside expression of specific autophagic
markers uncovered a regulatory role for OLE against autophagic flux impairment
induced by bafilomycin A1. Altogether, our results define OLE as a
neuroprotective, anti-oxidative and autophagy-regulating molecule, in a neuronal
dopaminergic cellular model.