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Miao YS, Wang JY, Zhuang RR, Huo XK, Yi ZC, Sun XN, Yu ZL, Tian XG, Ning J, Feng L, Ma XC, Lv X. A high-affinity fluorescent probe for human uridine-disphosphate glucuronosyltransferase 1A9 function monitoring under environmental pollutant exposure. J Hazard Mater 2024; 465:133439. [PMID: 38218035 DOI: 10.1016/j.jhazmat.2024.133439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/30/2023] [Accepted: 01/02/2024] [Indexed: 01/15/2024]
Abstract
Uridine-disphosphate glucuronosyltransferase 1A9 (UGT1A9), an important detoxification and inactivation enzyme for toxicants, regulates the exposure level of environmental pollutants in the human body and induces various toxicological consequences. However, an effective tool for high-throughput monitoring of UGT1A9 function under exposure to environmental pollutants is still lacking. In this study, 1,3-dichloro-7-hydroxy-9,9-dimethylacridin-2(9H)-one (DDAO) was found to exhibit excellent specificity and high affinity towards human UGT1A9. Remarkable changes in absorption and fluorescence signals after reacting with UGT1A9 were observed, due to the intramolecular charge transfer (ICT) mechanism. Importantly, DDAO was successfully applied to monitor the biological functions of UGT1A9 in response to environmental pollutant exposure not only in microsome samples, but also in living cells by using a high-throughput screening method. Meanwhile, the identified pollutants that disturb UGT1A9 functions were found to significantly influence the exposure level and retention time of bisphenol S/bisphenol A in living cells. Furthermore, the molecular mechanism underlying the inhibition of UGT1A9 by these pollutant-derived disruptors was elucidated by molecular docking and molecular dynamics simulations. Collectively, a fluorescent probe to characterize the responses of UGT1A9 towards environmental pollutants was developed, which was beneficial for elucidating the health hazards of environmental pollutants from a new perspective.
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Affiliation(s)
- Yi-Sheng Miao
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China; College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Jia-Yue Wang
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China; College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Rui-Rui Zhuang
- College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Xiao-Kui Huo
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China
| | - Zi-Chang Yi
- College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Xiao-Nan Sun
- College of Integrative Medicine, Dalian Medical University, Dalian 116044, China; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Zhen-Long Yu
- College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Xiang-Ge Tian
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China
| | - Jing Ning
- College of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Lei Feng
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China; Chengdu University of Traditional Chinese Medicine, Chengdu 611137 China.
| | - Xiao-Chi Ma
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China; Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Xia Lv
- Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China; College of Integrative Medicine, Dalian Medical University, Dalian 116044, China.
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Tang KY, Yu CH, Jiang L, Gong M, Liu WJ, Wang Y, Cui NX, Song W, Sun Y, Yi ZC. Long-term exposure of K562 cells to benzene metabolites inhibited erythroid differentiation and elevated methylation in erythroid specific genes. Toxicol Res (Camb) 2016; 5:1284-1297. [PMID: 30090432 DOI: 10.1039/c6tx00143b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/28/2016] [Indexed: 12/18/2022] Open
Abstract
Benzene is a common occupational hazard and a widespread environmental pollutant. Previous studies have revealed that 72 h exposure to benzene metabolites inhibited hemin-induced erythroid differentiation of K562 cells accompanied with elevated methylation in erythroid specific genes. However, little is known about the effects of long-term and low-dose benzene metabolite exposure. In this study, to elucidate the effects of long-term benzene metabolite exposure on erythroid differentiation, K562 cells were treated with low-concentration phenol, hydroquinone and 1,2,4-benzenetriol for at least 3 weeks. After exposure of K562 cells to benzene metabolites, hemin-induced hemoglobin synthesis declined in a concentration- and time-dependent manner, and the hemin-induced expressions of α-, β- and γ-globin genes and heme synthesis enzyme porphobilinogen deaminase were significantly suppressed. Furthermore, when K562 cells were continuously cultured without benzene metabolites for another 20 days after exposure to benzene metabolites for 4 weeks, the decreased erythroid differentiation capabilities still remained stable in hydroquinone- and 1,2,4-benzenetriol-exposed cells, but showed a slow increase in phenol-exposed K562 cells. In addition, methyltransferase inhibitor 5-aza-2'-deoxycytidine significantly blocked benzene metabolites inhibiting hemoglobin synthesis and expression of erythroid genes. Quantitative MassARRAY methylation analysis also confirmed that the exposure to benzene metabolites increased DNA methylation levels at several CpG sites in several erythroid-specific genes and their far-upstream regulatory elements. These results demonstrated that long-term and low-dose exposure to benzene metabolites inhibited the hemin-induced erythroid differentiation of K562 cells, in which DNA methylation played a role through the suppression of erythroid specific genes.
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Affiliation(s)
- K Y Tang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China . .,State Key Laboratory of Transducer Technology , Chinese Academy of Sciences , Beijing , China
| | - C H Yu
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - L Jiang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - M Gong
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - W J Liu
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - Y Wang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - N X Cui
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - W Song
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - Y Sun
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China . .,State Key Laboratory of Transducer Technology , Chinese Academy of Sciences , Beijing , China
| | - Z C Yi
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
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