<em>Ginkgo biloba</em> extract protects human neuroblastoma SH‑SY5Y cells against oxidative glutamate toxicity by activating redoxosome‑p66Shc

Wang,Ke; Ni,Jing; Zhu,Xue; Zhu,Ling; Li,Yue; Zhou,Fanfan

doi:10.3892/etm.2021.10383

Ginkgo biloba extract protects human neuroblastoma SH‑SY5Y cells against oxidative glutamate toxicity by activating redoxosome‑p66Shc

Authors:
- Ke Wang
- Jing Ni
- Xue Zhu
- Ling Zhu
- Yue Li
- Fanfan Zhou
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Affiliations: NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu 214063, P.R. China, Department of Geriatric Rehabilitation, Jiangsu Rongjun Hospital, Wuxi, Jiangsu 214035, P.R. China, Save Sight Institute, The University of Sydney, Sydney, New South Wales 2006, Australia, Sydney Pharmacy School, The University of Sydney, Sydney, New South Wales 2006, Australia
Published online on: July 5, 2021 https://doi.org/10.3892/etm.2021.10383
Article Number: 951
Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Ginkgo biloba extract (GBE), a traditional Chinese herbal medicine component, is widely used to alleviate symptoms of neurodegenerative diseases. It has been confirmed that GBE exerts its pharmacological effect mainly due to its antioxidant activity; however, the molecular mechanism responsible for this effect remains unclear. The aim of the present study was to investigate the detailed mechanism of GBE, the main component of Gingko biloba dropping medicine, against oxidative glutamate toxicity in human neuroblastoma SH‑SY5Y cells. The SH‑SY5Y cells were untreated or pretreated with GBE followed by glutamate stimulation. Cell viability was assessed using an MTT assay. In addition, oxidative stress indexes, including intracellular ROS generation and NADPH oxidase and caspase activity, were also measured. The protein expression of key signaling factors involved in the redoxosome‑p66Shc pathway was evaluated to elucidate the neuroprotective effect of GBE. The results showed that GBE treatment significantly attenuated the glutamate‑induced cytotoxicity in SH‑SY5Y cells by suppressing oxidative stress. A mechanical study revealed that redoxosome‑p66Shc activation was associated with glutamate‑induced cytotoxicity, which caused mitochondrial dysfunction and cell death. Interestingly, GBE treatment attenuated the activation of redoxosome‑p66Shc in a dose‑dependent manner, which suggested that the protective effect of GBE on SH‑SY5Y cells against oxidative glutamate toxicity may be mediated by the modulation of redoxosome‑p66Shc signaling. The current findings contribute to a better understanding of the therapeutic effect of GBE and indicate that redoxosome‑p66Shc signaling might be a novel therapeutic target in the prevention and/or treatment of neurodegenerative diseases.

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