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Li J, Ding H, Zhao Y, Lin M, Song L, Wang W, Dong H, Ma X, Liu W, Han L, Zheng F. DNA Repair-Responsive Engineered Whole Cell Microbial Sensors for Sensitive and High-Throughput Screening of Genotoxic Impurities. Anal Chem 2023; 95:12893-12902. [PMID: 37589895 DOI: 10.1021/acs.analchem.3c02245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Genotoxic impurities (GTIs) occurred in drugs, and food and environment pose a threat to human health. Accurate and sensitive evaluation of GTIs is of significance. Ames assay is the existing gold standard method. However, the pathogenic bacteria model lacks metabolic enzymes and requires mass GTIs, leading to insufficient safety, accuracy, and sensitivity. Whole-cell microbial sensors (WCMSs) can use normal strains to simulate the metabolic environment, achieving safe, sensitive, and high-throughput detection and evaluation for GTIs. Here, based on whether GTIs causing DNA alkylation required metabolic enzymes or not, two DNA repair-responsive engineered WCMS systems were constructed including Escherichia coli-WCMS and yeast-WCMS. A DNA repair-responsive promoter as a sensing element was coupled with an enhanced green fluorescent protein as a reporter to construct plasmids for introduction into WCMS. The ada promoter was screened out in the E. coli-WCMS, while the MAG1 promoter was selected for the yeast-WCMS. Different E. coli and yeast strains were modified by gene knockout and mutation to eliminate the interference and enhance the GTI retention in cells and further improved the sensitivity. Finally, GTI consumption of WCMS for the evaluation of methyl methanesulfonate (MMS) and nitrosamines was decreased to 0.46-8.53 μg and 0.068 ng-2.65 μg, respectively, decreasing 2-3 orders of magnitude compared to traditional methods. This study provided a novel approach to measure GTIs with different DNA damage pathways at a molecular level and facilitated the high-throughput screening and sensitive evaluation of GTIs.
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Affiliation(s)
- Jie Li
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Haotian Ding
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Yuning Zhao
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Mingbin Lin
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Linqi Song
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Wei Wang
- Chongqing Fuling Institute for Food and Drug Control, Chongqing 408102, China
| | - Haijuan Dong
- The Public Laboratory Platform, China Pharmaceutical University, Nanjing 210009, China
| | - Xiao Ma
- Gansu Institute for Drug Control, Lanzhou 730000, China
| | - Wenyuan Liu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
- Zhejiang Center for Safety Study of Drug Substances (Industrial Technology Innovation Platform), Hangzhou 310018, China
| | - Lingfei Han
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
| | - Feng Zheng
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 211198, China
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Ordzhonikidze KG, Igonina EV, Zhoshibekova BS, Abilev SK. Comparative Study of the DNA-Damaging Activity of Epichlorohydrin Using Escherichia coli Biosensors and the Comet Assay Method in Mice. RUSS J GENET+ 2021. [DOI: 10.1134/s1022795421090088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abilev SK, Igonina EV, Smirnova SV, Rubanovich AV. Effect of Deuterium on the Expression of Inducible Genes in Escherichia coli. BIOL BULL+ 2019. [DOI: 10.1134/s1062359019110025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Meador JA, Baldwin AJ, Pakulski JD, Jeffrey WH, Mitchell DL, Douki T. The significance of the Dewar valence photoisomer as a UV radiation-induced DNA photoproduct in marine microbial communities. Environ Microbiol 2014; 16:1808-20. [PMID: 24517516 DOI: 10.1111/1462-2920.12414] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 01/11/2014] [Accepted: 01/27/2014] [Indexed: 11/28/2022]
Abstract
Induction of pyrimidine dimers in DNA by solar UV radiation has drastic effects on microorganisms. To better define the nature of these DNA photoproducts in marine bacterioplankton and eukaryotes, a study was performed during a cruise along a latitudinal transect in the Pacific Ocean. The frequency of all possible cyclobutane pyrimidine dimers, pyrimidine (6-4) pyrimidone photoproducts (64PPs) and their related Dewar valence isomers (DEWs) was determined by high-performance liquid chromatography-mass spectrometry. Studied samples were bacterioplankton and eukaryotic fractions isolated from sea water either collected before sunrise or exposed to ambient sunlight from sunrise to sunset. Isolated DNA dosimeters were also exposed to daily sunlight for comparison purposes. A first major result was the observation in all samples of large amounts of DEWs, a class of photoproducts rarely considered outside photochemical studies. Evidence was obtained for a major role of UVA in the formation of these photoisomerization products of 64PPs. Considerations on the ratio between the different classes of photoproducts in basal and induced DNA damage suggests that photoenzymatic repair (PER) is an important DNA repair mechanism used by marine microorganisms occupying surface seawater in the open ocean. This result emphasizes the biological role of DEWs which are very poor substrate for PER.
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Affiliation(s)
- Jarah A Meador
- Center for Radiological Research, Columbia University, New York, NY, USA
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