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Food Chem Toxicol. 2018 Dec;122:215-224. doi: 10.1016/j.fct.2018.09.078. Epub 2018 Oct 9.

Bisphenol A exhibits cytotoxic or genotoxic potential via oxidative stress-associated mitochondrial apoptotic pathway in murine macrophages.

Author information

1
Department of Dentistry, Chung Shan Medical University Hospital, Taichung, Taiwan; School of Dentistry, Chung Shan Medical University, Taichung, Taiwan.
2
School of Public Health, Chung Shan Medical University, Taichung, Taiwan.
3
School of Medical Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan.
4
Department of Anatomy, School of Medicine, Chung Shan Medical University, Taichung, Taiwan.
5
Department of Optometry, Asia University, Taichung, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
6
Department of Pharmacology, Chung Shan Medical University, Taichung, Taiwan; Department of Pharmacy, Chung Shan Medical University Hospital, Taichung, Taiwan. Electronic address: kuanyh@csmu.edu.tw.

Abstract

Bisphenol A (BPA) is primarily used in production of polycarbonate plastics and epoxy resins including plastic containers. BPA is an endocrine disruptor and supposes to induce asthma and cancer. However, so far only a few evidences have shown the BPA-induced toxic effect and its related mechanism in macrophages. BPA demonstrated cytotoxic effect on RAW264.7 macrophages in a concentration and time-dependent manner. BPA induces necrosis, apoptosis, and genotoxicity in a concentration-dependent manner. Phosphorylation of cytochrome C (cyto C) and p53 was due to mitochondrial disruption via BCL2 and BCL-XL downregulation and BAX, BID, and BAD upregulation. Both caspase-dependent, including caspase-9, caspase-3, and PARP-1 cleavage, and caspase-independent, such as nuclear translocation of AIF, pathways were activated by BPA. Furthermore, generation of reactive oxygen species (ROS) and reduction of antioxidative enzyme activities were induced by BPA. Parallel trends were observed in the effect of BPA on cytotoxicity, apoptosis, genotoxicity, p53 phosphorylation, BCL2 family expression exchange, caspase-dependent and independent apoptotic pathways, and ROS generation in RAW264.7 macrophages. Finally, BPA-exhibited cytotoxicity, apoptosis, and genotoxicity could be inhibited by N-acetylcysteine. These results indicated that the toxic effect of BPA was functioning via oxidative stress-associated mitochondrial apoptotic pathway in macrophages.

KEYWORDS:

Bisphenol A; Caspase; Genotoxicity; Macrophages; Mitochondrial pathway of apoptosis; ROS

PMID:
30312649
DOI:
10.1016/j.fct.2018.09.078
[Indexed for MEDLINE]

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