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| Effects of bisphenols on proliferation and oxidative stress of BRL 3A rat liver cells and their mutagenicities |
| ZHANG Zhen, HONG Ying, GAI Yating, LIN Lihua, WENG Luna, LI Lingling
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| Department of Pharmacology, Xiamen Institute for Food and Drug Quality Control, Xiamen, Fujian 361012, China |
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Abstract Objective To examine the effects of bisphenol A (BPA), bisphenol S ( BPS ), bisphenol F ( BPF ) and bisphenol AF ( BPAF ) on the proliferation and oxidative stress of BRL 3A rat liver cells, and to preliminarily evaluate their mutagenicities. Methods In vitro cultured BRL 3A rat liver cells were treated with BPA, BPS, BPF and BPAF at concentrations of 0, 5, 10, 25, 50, 100, 150 and 200 μmol/L for 48 h, respectively. Then, the cell viability was determined using the CCK-8 assay, and the half maximal inhibitory concentration ( IC50 ) was calculated. The minimum inhibitory concentration for BRL 3A cell proliferation was screened, and the intracellular reactive oxygen species ( ROS ) was measured in BRL 3A cells using the 2',7'-dichlorodihydrofluorescein diacetate ( DCFH-DA ) assay. In addition, the effects of BPA, BPS, BPF and BPAF at concentrations of 1 000, 200, 40, 8 and 1.6 μg/plate on the mutant colonies of histidine-deficient Salmonella typhimurium ( TA1535, TA97a, TA98, TA100 and TA102 ) were tested using the Ames test. Results Treatment with BPA and BPF at concentrations of 100 to 200 μmol/L and with BPAF at concentrations of 25 to 200 μmol/L inhibited BRL 3A cell survival at a concentration-dependent manner, while exposure to BPS at concentrations of 5 to 200 μmol/L resulted in no changes in BRL 3A cell survival. The IC50 values of BPA, BPS, BPF and BPAF were 131.7, >200, 187.5 and 21.6 μmol/L against BRL 3A cells, respectively. Treatment with BPS at 100 μmol/L or BPAF at 25 μmol/L caused no significant changes in the ROS level; however, exposure to BPA at 100 μmol/L and BPF at 100 μmol/L significantly increased the ROS level. Ames test showed that BPA, BPS, BPF and BPAF did not induce mutagenicity in TA1535, TA97a, TA98, TA100 or TA102 strains. Conclusions BPAF shows the highest cytotoxicity to BRL 3A cells, and low-concentration exposure to BPS has few effects on BRL 3A cells. The cytotoxicity of bisphenols against BRL 3A cells may be associated with the induction of oxidative stress. None of the four bisphenols show mutagenic effects under the present experimental conditions.
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Received: 08 November 2021
Revised: 30 December 2021
Published: 14 March 2022
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