Abstract
Background
This study was designed to investigate the neuroprotective effects of bromelain, which is known to have anti-oxidant and anti-inflammatory properties, against the neurotoxicity (induced by 6-OHDA) in SH-SY5Y cells.
Methods and results
To establish Parkinson’s Disease (PD) model in cell culture conditions, SH-SY5Y cells were exposed to 200 µM 6-OHDA for 1 day. Prior to 6-OHDA treatment, SH-SY5Y cells had been pre-treated with bromelain (25 µg/mL, 50 µg/mL, 75 µg/mL and 100 µg/mL). After 1 day, cell viability was determined with the 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) and lactate dehydrogenase (LDH) assays. Oxidative stress was assessed with total antioxidant capacity (TAC), total oxidant status (TOS), glutathione reductase (GR) and malondialdehyde (MDA) analyses. The effect of the bromelain in SH-SY5Ycells was also examined by 4′,6-diamidino-2-phenylindole (DAPI) staining. We found that 6-OHDA increased LDH leakage, and cellular apoptosis in SH-SY5Y cells. 6-OHDA aggravated oxidative stress by increasing TOS, MDA and GR and eventually promoted apoptosis in SH-SY5Y cells, while pretreatment with bromelain attenuated these toxic effects of 6-OHDA.
Conclusions
These findings indicated that bromelain, with its neuroprotective features can be useful for neuroprotection in PD.
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Data availability
Data and materials are available from the authors upon request.
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IFO and UO performed the experiments and wrote the manuscript; BC and ASM contributed significantly to the experiments and data analysis; AH contributed to the conception of the study; others assisted with the experiments.
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Ferah Okkay, I., Okkay, U., Cicek, B. et al. Neuroprotective effect of bromelain in 6-hydroxydopamine induced in vitro model of Parkinson’s disease. Mol Biol Rep 48, 7711–7717 (2021). https://doi.org/10.1007/s11033-021-06779-y
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DOI: https://doi.org/10.1007/s11033-021-06779-y