Fluazinam-induced apoptosis of SH-SY5Y cells is mediated by p53 and Bcl-2 family proteins
- Authors
- Lee, Jeong Eun; Kang, Jin Sun; Shin, In Chul; Lee, Soo-Jin; Hyun, Dong-Hoon; Lee, Kyung Suk; Koh, Hyun Chul
- Issue Date
- Dec-2011
- Publisher
- ELSEVIER
- Keywords
- Fluazinam; Apoptosis; Reactive oxygen species; p53; Bcl-2 family
- Citation
- NEUROTOXICOLOGY, v.32, no.6, pp.702 - 710
- Indexed
- SCIE
SCOPUS
- Journal Title
- NEUROTOXICOLOGY
- Volume
- 32
- Number
- 6
- Start Page
- 702
- End Page
- 710
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/166949
- DOI
- 10.1016/j.neuro.2011.08.004
- ISSN
- 0161-813X
- Abstract
- A number of epidemiological studies have demonstrated a strong association between the incidence of neurodegenerative disease and pesticide exposure. Fluazinam (FZN) is a preventative fungicide from the pyridinamine group that was introduced in the 1990s and that quickly established itself as a new standard for the control of blight caused by Phytophthora infestans in potatoes. We used human neuroblastoma SH-SY5Y cells to investigate mechanisms of neuronal cell death in response to FZN and showed that FZN was cytotoxic to SH-SY5Y cells in a concentration- and time-dependent manner. Additionally, we showed that FZN treatment significantly decreased the neuron numbers including dopaminergic neurons and mitochondria] complex 1 activity. The cytotoxic effects of FZN were associated with an increase in reactive oxygen species (ROS) generation because pretreatment with N-acetyl cysteine, an anti-oxidant, reduced cell death. We showed that neuronal cell death in response to FZN was due to apoptosis because FZN increased cytochrome C release into the cytosol and activated caspase-3 through the accumulation of p53. FZN also reduced the levels of Bcl-2 protein but increased the levels of Bax. Our results provide insight into the molecular mechanisms of FZN-induced apoptosis in neuronal cells.
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