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Zhou X, Xiang Q, Wu Y, Li Y, Peng T, Xu X, Zhou Y, Zhang L, Li J, Du L, Tan G, Wang W. A low-cost and eco-friendly recombinant protein expression system using copper-containing industrial wastewater. Front Microbiol 2024; 15:1367583. [PMID: 38585706 PMCID: PMC10995868 DOI: 10.3389/fmicb.2024.1367583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 02/19/2024] [Indexed: 04/09/2024] Open
Abstract
The development of innovative methods for highly efficient production of recombinant proteins remains a prominent focus of research in the biotechnology field, primarily due to the fact that current commercial protein expression systems rely on expensive chemical inducers, such as isopropyl β-D-thiogalactoside (IPTG). In our study, we designed a novel approach for protein expression by creating a plasmid that responds to copper. This specialized plasmid was engineered through the fusion of a copper-sensing element with an optimized multiple cloning site (MCS) sequence. This MCS sequence can be easily customized by inserting the coding sequences of target recombinant proteins. Once the plasmid was generated, it was introduced into an engineered Escherichia coli strain lacking copA and cueO. With this modified E. coli strain, we demonstrated that the presence of copper ions can efficiently trigger the induction of recombinant protein expression, resulting in the production of active proteins. Most importantly, this expression system can directly utilize copper-containing industrial wastewater as an inducer for protein expression while simultaneously removing copper from the wastewater. Thus, this study provides a low-cost and eco-friendly strategy for the large-scale recombinant protein production. To the best of our knowledge, this is the first report on the induction of recombinant proteins using industrial wastewater.
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Affiliation(s)
- Xiaofeng Zhou
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qiyu Xiang
- College of Life Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yubei Wu
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yongjuan Li
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Tiantian Peng
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xianxian Xu
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yongguang Zhou
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lihe Zhang
- Department of Rheumatology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jianghui Li
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Linyong Du
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Guoqiang Tan
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Wu Wang
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
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Xiang Y, Guo Y, Liu G, Liu Y, Song M, Shi J, Hu L, Yin Y, Cai Y, Jiang G. Direct Uptake and Intracellular Dissolution of HgS Nanoparticles: Evidence from a Bacterial Biosensor Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14994-15003. [PMID: 37755700 DOI: 10.1021/acs.est.3c02664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
Mercury sulfide nanoparticles (HgSNPs), which occur widely in oxic and anoxic environments, can be microbially converted to highly toxic methylmercury or volatile elemental mercury, but it remains challenging to assess their bioavailability. In this study, an Escherichia coli-based whole-cell fluorescent biosensor was developed to explore the bioavailability and microbial activation process of HgSNPs. Results show that HgSNPs (3.17 ± 0.96 nm) trigger a sharp increase in fluorescence intensity of the biosensor, with signal responses almost equal to that of ionic Hg (Hg(II)) within 10 h, indicating high bioavailability of HgSNP. The intracellular total Hg (THg) of cells exposed to HgSNPs (200 μg L-1) was 3.52-8.59-folds higher than that of cells exposed to Hg(II) (200 μg L-1), suggesting that intracellular HgSNPs were only partially dissolved. Speciation analysis using size-exclusion chromatography (SEC)-inductively coupled plasma mass spectrometry (ICP-MS) revealed that the bacterial filtrate was not responsible for HgSNP dissolution, suggesting that HgSNPs entered cells in nanoparticle form. Combined with fluorescence intensity and intracellular THg analysis, the intracellular HgSNP dissolution ratio was estimated at 22-29%. Overall, our findings highlight the rapid internalization and high intracellular dissolution ratio of HgSNPs by E. coli, and intracellular THg combined with biosensors could provide innovative tools to explore the microbial uptake and dissolution of HgSNPs.
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Affiliation(s)
- Yuping Xiang
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yingying Guo
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Guangliang Liu
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Yanwei Liu
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Maoyong Song
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jianbo Shi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yongguang Yin
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Yong Cai
- Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Jeon Y, Lee Y, Jang G, Kim BG, Yoon Y. Design of Pb(II)-Specific E. coli-Based Biosensors by Engineering Regulatory Proteins and Host Cells. Front Microbiol 2022; 13:881050. [PMID: 35668759 PMCID: PMC9164158 DOI: 10.3389/fmicb.2022.881050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/04/2022] [Indexed: 11/13/2022] Open
Abstract
Bacterial cell-based biosensors have been widely developed for detecting environmental toxic materials. The znt-operon in Escherichia coli is a Zn(II)-responsive genetic system and is employed in Zn(II), Cd(II), and Hg(II)-sensing biosensors. In this study, point mutations were introduced in the regulatory protein ZntR to modulate its target selectivity, and metal ion-exporting genes, such as copA and zntA, in host cells were deleted to increase cellular metal ion levels and enhance specificity. Thus, the overall responses of the E. coli cell-based biosensors toward metal(loid) ions were increased, and their selectivity, which was originally for Cd(II) and Hg(II), was shifted to Pb(II). The gene encoding ZntA, known as the Zn(II)-translocating P-type ATPase, showed an impact on the ability of E. coli to export Pb(II), whereas copA deletion showed no significant impact. Noteworthily, the newly generated biosensors employing ZntR Cys115Ile showed the capacity to detect under 5 nM Pb(II) in solution, without response to other tested metal ions within 0–100 nM. To understand the marked effect of single point mutations on ZntR, computational modeling was employed. Although it did not provide clear answers, changes in the sequences of the metal-binding loops of ZntR modulated its transcriptional strength and target selectivity. In summary, the approaches proposed in this study can be valuable to generate new target-sensing biosensors with superior selectivity and specificity, which can in turn broaden the applicability of cell-based biosensors to monitor Pb(II) in environmental systems.
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Affiliation(s)
- Yangwon Jeon
- Department of Environmental Health Science, Konkuk University, Seoul, South Korea
| | - Yejin Lee
- Department of Environmental Health Science, Konkuk University, Seoul, South Korea
| | - Geupil Jang
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, South Korea
| | - Bong-Gyu Kim
- Division of Environmental and Forest Science, Gyeongsang National University, Jinju, South Korea
| | - Youngdae Yoon
- Department of Environmental Health Science, Konkuk University, Seoul, South Korea
- *Correspondence: Youngdae Yoon
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Lee Y, Jeon Y, Jang G, Yoon Y. Derivation of pb(II)-sensing Escherichia coli cell-based biosensors from arsenic responsive genetic systems. AMB Express 2021; 11:169. [PMID: 34910261 PMCID: PMC8674403 DOI: 10.1186/s13568-021-01329-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 11/28/2021] [Indexed: 11/10/2022] Open
Abstract
Heavy metal-responsive operons were used for the generation of Escherichia coli cell-based biosensors. The selectivity and specificity of the biosensors were determined based on the interaction between heavy metals and regulatory proteins; thereby, the modulating target selectivity of biosensors could be achieved by changing target sensing properties of regulatory proteins. The results of this study demonstrated that Pb(II)-sensing biosensors could be generated from an arsenic-responsive genetic system, which was originally used for arsenic-sensing biosensors. The amino acids around to As(III)-binding sites of ArsR were mutated and cysteine residues were relocated to modulate the metal selectivity. In addition, genes encoding metal ion-translocating P-type ATPases, such as copA and zntA, were deleted to enhance the specificity by increasing the intercellular levels of divalent metal ions. Based on the results, channel protein deleted E. coli cells harboring a pair of recombinant genes, engineered ArsR and arsAp::egfp, showed enhanced responses upon Pb exposure and could be used to quantify the amount of Pb(II) in artificially contaminated water and plants grown in media containing Pb(II). Although we focused on generating Pb(II)-specific biosensors in this study, the proposed strategy has a great potential for the generation of diverse heavy metal-sensing biosensors and risk assessment of heavy metals in environmental samples as well as in plants.
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Jia X, Liu T, Ma Y, Wu K. Construction of cadmium whole-cell biosensors and circuit amplification. Appl Microbiol Biotechnol 2021; 105:5689-5699. [PMID: 34160647 DOI: 10.1007/s00253-021-11403-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 01/07/2023]
Abstract
Owing to the prevalence of cadmium contamination and its serious hazards, it is important to establish an efficient and low-cost monitoring technique for the detection of the heavy metal cadmium. In this study, we first designed 30 cadmium whole-cell biosensors (WCBs) using different combinations of detection elements, reporting elements, and the host. The best performing WCB KT-5-R with Pseudomonas putida KT2440 as the host and composed of CadR and mCherry was selected for further analysis and engineering. In order to enhance its sensitivity, a positive feedback amplifier was added or the gene dosage of the reporter gene was increased. The WCB with the T7RNAP amplification module, p2T7RNAPmut-68, had the best performance and improved tolerance to cadmium with a detection limit of 0.01 μM, which is the WHO standard. It also showed excellent specificity toward cadmium when assayed with mixed metal ions. This study demonstrated the power of circuit engineering in WCB design and provided valuable insights for the development of other WCBs. KEY POINTS: • KT-5-R was selected after prescreening and engineered for better performance. • Using multi-copy reporters and the T7RNAP amplifier greatly improved the performance. • p2T7RNAPmut-68 had a detection limit of 0.01 μM and improved tolerance to cadmium.
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Affiliation(s)
- Xiaoqiang Jia
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China. .,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, People's Republic of China. .,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin University), Tianjin, 300072, People's Republic of China.
| | - Teng Liu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Yubing Ma
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Kang Wu
- Department of Chemical Engineering, University of New Hampshire, Durham, NH, 03824, USA.
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6
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Elcin E, Öktem HA. Inorganic Cadmium Detection Using a Fluorescent Whole-Cell Bacterial Bioreporter. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1755867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Evrim Elcin
- Department of Agricultural Biotechnology, Adnan Menderes University, Aydın, Turkey
| | - Huseyin Avni Öktem
- Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
- Nanobiz Technology Inc, Ankara, Turkey
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7
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Modulating the sensing properties of Escherichia coli-based bioreporters for cadmium and mercury. Appl Microbiol Biotechnol 2018; 102:4863-4872. [DOI: 10.1007/s00253-018-8960-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 10/17/2022]
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8
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Enhancing the copper-sensing capability of Escherichia coli-based whole-cell bioreporters by genetic engineering. Appl Microbiol Biotechnol 2017; 102:1513-1521. [DOI: 10.1007/s00253-017-8677-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/23/2017] [Accepted: 11/24/2017] [Indexed: 11/26/2022]
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Brutesco C, Prévéral S, Escoffier C, Descamps ECT, Prudent E, Cayron J, Dumas L, Ricquebourg M, Adryanczyk-Perrier G, de Groot A, Garcia D, Rodrigue A, Pignol D, Ginet N. Bacterial host and reporter gene optimization for genetically encoded whole cell biosensors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:52-65. [PMID: 27234828 DOI: 10.1007/s11356-016-6952-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/20/2016] [Indexed: 06/05/2023]
Abstract
Whole-cell biosensors based on reporter genes allow detection of toxic metals in water with high selectivity and sensitivity under laboratory conditions; nevertheless, their transfer to a commercial inline water analyzer requires specific adaptation and optimization to field conditions as well as economical considerations. We focused here on both the influence of the bacterial host and the choice of the reporter gene by following the responses of global toxicity biosensors based on constitutive bacterial promoters as well as arsenite biosensors based on the arsenite-inducible Pars promoter. We observed important variations of the bioluminescence emission levels in five different Escherichia coli strains harboring two different lux-based biosensors, suggesting that the best host strain has to be empirically selected for each new biosensor under construction. We also investigated the bioluminescence reporter gene system transferred into Deinococcus deserti, an environmental, desiccation- and radiation-tolerant bacterium that would reduce the manufacturing costs of bacterial biosensors for commercial water analyzers and open the field of biodetection in radioactive environments. We thus successfully obtained a cell survival biosensor and a metal biosensor able to detect a concentration as low as 100 nM of arsenite in D. deserti. We demonstrated that the arsenite biosensor resisted desiccation and remained functional after 7 days stored in air-dried D. deserti cells. We also report here the use of a new near-infrared (NIR) fluorescent reporter candidate, a bacteriophytochrome from the magnetotactic bacterium Magnetospirillum magneticum AMB-1, which showed a NIR fluorescent signal that remained optimal despite increasing sample turbidity, while in similar conditions, a drastic loss of the lux-based biosensors signal was observed.
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Affiliation(s)
- Catherine Brutesco
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Sandra Prévéral
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Camille Escoffier
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Elodie C T Descamps
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Elsa Prudent
- Université de Lyon, Lyon, 69003, France
- INSA de Lyon, Villeurbanne, 69621, France
- CNRS, UMR5240, Microbiologie, Adaptation et Pathogénie, Université Lyon 1, Villeurbanne, 69622, France
| | - Julien Cayron
- Université de Lyon, Lyon, 69003, France
- INSA de Lyon, Villeurbanne, 69621, France
- CNRS, UMR5240, Microbiologie, Adaptation et Pathogénie, Université Lyon 1, Villeurbanne, 69622, France
| | - Louis Dumas
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Manon Ricquebourg
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Géraldine Adryanczyk-Perrier
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Arjan de Groot
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Daniel Garcia
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Agnès Rodrigue
- Université de Lyon, Lyon, 69003, France
- INSA de Lyon, Villeurbanne, 69621, France
- CNRS, UMR5240, Microbiologie, Adaptation et Pathogénie, Université Lyon 1, Villeurbanne, 69622, France
| | - David Pignol
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France
| | - Nicolas Ginet
- CEA, DRF, BIAM, Lab Bioenerget Cellulaire, Saint-Paul-lez-Durance, 13108, France.
- CNRS, UMR Biol Veget and Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.
- Aix-Marseille Université, Saint-Paul-lez-Durance, 13108, France.
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Khaniabadi YO, Goudarzi G, Daryanoosh SM, Borgini A, Tittarelli A, De Marco A. Exposure to PM 10, NO 2, and O 3 and impacts on human health. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:1-3. [PMID: 27837472 DOI: 10.1007/s11356-015-5582-4] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/07/2015] [Indexed: 05/23/2023]
Abstract
Air pollution is emerging as a risk factor for human health like cancer and other health outcomes in developing countries, especially Iran where air pollutant concentrations are elevated. Additionally, some of the crucial environmental problems are caused by air pollution. Nevertheless, the data on health effects of air pollution are limited. The main objective of this study was to assess the health impacts attributed to particulate matter less than 10 μg/m3 (PM10), nitrogen dioxide (NO2), and ozone (O3) in Kermanshah City (Iran). The diurnal averages of PM10 and NO2 levels and 1-h averages of O3 concentrations were applied to assess the cardiovascular mortality due to exposure to these pollutants during the years 2014 and 2015. The excess number of cardiovascular mortality was estimated by relative risk (RR) and baseline incidence (BI) defined by the World Health Organization (WHO). The excess in mortality risk for cardiovascular diseases is of 188 premature deaths related to PM10, 33 related to NO2, and 83 related to O3, respectively. The results indicate that a 10-μg/m3 change in PM10, NO2, and O3 generates a relative risk of 1.066, 1.012, and 1.020, respectively. The excess of relative risk is of 6.6, 1.2, and 2.0%, respectively. Immediate policies and actions are needed to reduce the various sources of these pollutants from transport and energy manufacture facilities in Kermanshah.
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Affiliation(s)
- Yusef Omidi Khaniabadi
- Health Care System of Karoon, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Gholamreza Goudarzi
- Environmental Technologies Research Center (ETRC), Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Air Pollution and Respiratory Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Alessandro Borgini
- Cancer Registry and Environmental Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, Milan, Italy
| | - Andrea Tittarelli
- Cancer Registry and Environmental Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, Milan, Italy
| | - Alessandra De Marco
- Department of Territorial and Production Systems Sustainability, SSPT-MET-INAT, ENEA, CR Casaccia, Via Anguillarese 301, 00123, Rome, Italy.
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11
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Martín-Betancor K, Rodea-Palomares I, Muñoz-Martín MA, Leganés F, Fernández-Piñas F. Construction of a self-luminescent cyanobacterial bioreporter that detects a broad range of bioavailable heavy metals in aquatic environments. Front Microbiol 2015; 6:186. [PMID: 25806029 PMCID: PMC4353254 DOI: 10.3389/fmicb.2015.00186] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 02/19/2015] [Indexed: 11/13/2022] Open
Abstract
A self-luminescent bioreporter strain of the unicellular cyanobacterium Synechococcus sp. PCC 7942 was constructed by fusing the promoter region of the smt locus (encoding the transcriptional repressor SmtB and the metallothionein SmtA) to luxCDABE from Photorhabdus luminescens; the sensor smtB gene controlling the expression of smtA was cloned in the same vector. The bioreporter performance was tested with a range of heavy metals and was shown to respond linearly to divalent Zn, Cd, Cu, Co, Hg, and monovalent Ag. Chemical modeling was used to link bioreporter response with metal speciation and bioavailability. Limits of Detection (LODs), Maximum Permissive Concentrations (MPCs) and dynamic ranges for each metal were calculated in terms of free ion concentrations. The ranges of detection varied from 11 to 72 pM for Hg2+ (the ion to which the bioreporter was most sensitive) to 1.54–5.35 μM for Cd2+ with an order of decreasing sensitivity as follows: Hg2+ >> Cu2+ >> Ag+ > Co2+ ≥ Zn2+ > Cd2+. However, the maximum induction factor reached 75-fold in the case of Zn2+ and 56-fold in the case of Cd2+, implying that Zn2+ is the preferred metal in vivo for the SmtB sensor, followed by Cd2+, Ag+ and Cu2+ (around 45–50-fold induction), Hg2+ (30-fold) and finally Co2+ (20-fold). The bioreporter performance was tested in real environmental samples with different water matrix complexity artificially contaminated with increasing concentrations of Zn, Cd, Ag, and Cu, confirming its validity as a sensor of free heavy metal cations bioavailability in aquatic environments.
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Affiliation(s)
| | | | - M A Muñoz-Martín
- Department of Biology, Universidad Autónoma de Madrid Madrid, Spain
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12
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Reimer A, Yagur-Kroll S, Belkin S, Roy S, van der Meer JR. Escherichia [corrected] coli ribose binding protein based bioreporters revisited. Sci Rep 2014; 4:5626. [PMID: 25005019 PMCID: PMC4088097 DOI: 10.1038/srep05626] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 06/17/2014] [Indexed: 01/09/2023] Open
Abstract
Bioreporter bacteria, i.e., strains engineered to respond to chemical exposure by production of reporter proteins, have attracted wide interest because of their potential to offer cheap and simple alternative analytics for specified compounds or conditions. Bioreporter construction has mostly exploited the natural variation of sensory proteins, but it has been proposed that computational design of new substrate binding properties could lead to completely novel detection specificities at very low affinities. Here we reconstruct a bioreporter system based on the native Escherichia coli ribose binding protein RbsB and one of its computationally designed variants, reported to be capable of binding 2,4,6-trinitrotoluene (TNT). Our results show in vivo reporter induction at 50 nM ribose, and a 125 nM affinity constant for in vitro ribose binding to RbsB. In contrast, the purified published TNT-binding variant did not bind TNT nor did TNT cause induction of the E. coli reporter system.
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Affiliation(s)
- Artur Reimer
- Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, Quartier UNIL-Sorge 1015 Lausanne, Switzerland
| | - Sharon Yagur-Kroll
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Shimshon Belkin
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Shantanu Roy
- Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, Quartier UNIL-Sorge 1015 Lausanne, Switzerland
| | - Jan Roelof van der Meer
- Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, Quartier UNIL-Sorge 1015 Lausanne, Switzerland
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Amaro F, Turkewitz AP, Martín-González A, Gutiérrez JC. Whole-cell biosensors for detection of heavy metal ions in environmental samples based on metallothionein promoters from Tetrahymena thermophila. Microb Biotechnol 2011; 4:513-22. [PMID: 21366892 PMCID: PMC3815263 DOI: 10.1111/j.1751-7915.2011.00252.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Heavy metals are among the most serious pollutants, and thus there is a need to develop sensitive and rapid biomonitoring methods for heavy metals in the environment. Critical parameters such as bioavailability, toxicity and genotoxicity cannot be tested using chemical analysis, but only can be assayed using living cells. A whole‐cell biosensor uses the whole cell as a single reporter incorporating both bioreceptor and transducer elements. In the present paper, we report results with two gene constructs using the Tetrahymena thermophila MTT1 and MTT5 metallothionein promoters linked with the eukaryotic luciferase gene as a reporter. This is the first report of a ciliated protozoan used as a heavy metal whole‐cell biosensor. T. thermophila transformed strains were created as heavy metal whole‐cell biosensors, and turn on bioassays were designed to detect, in about 2 h, the bioavailable heavy metals in polluted soil or aquatic samples. Validation of these whole‐cell biosensors was carried out using both artificial and natural samples, including methods for detecting false positives and negatives. Comparison with other published cell biosensors indicates that the Tetrahymena metallothionein promoter‐based biosensors appear to be the most sensitive eukaryotic metal biosensors and compare favourably with some prokaryotic biosensors as well.
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Affiliation(s)
- Francisco Amaro
- Departamento de Microbiología-III, Facultad de Biología, C/. José Antonio Novais 2, Universidad Complutense, Madrid, Spain
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Hynninen A, Tönismann K, Virta M. Improving the sensitivity of bacterial bioreporters for heavy metals. Bioeng Bugs 2009; 1:132-8. [PMID: 21326938 DOI: 10.4161/bbug.1.2.10902] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 11/30/2009] [Accepted: 12/02/2009] [Indexed: 11/19/2022] Open
Abstract
Whole-cell bacterial bioreporters represent a convenient testing method for quantifying the bioavailability of contaminants in environmental samples. Despite the fact that several bioreporters have been constructed for measuring heavy metals, their application to environmental samples has remained minimal. The major drawbacks of the available bioreporters include a lack of sensitivity and specificity. Here, we report an improvement in the limit of detection of bacterial bioreporters by interfering with the natural metal homeostasis system of the host bacterium. The limit of detection of a Pseudomonas putida KT2440-based Zn/Cd/Pb-biosensor was improved by a factor of up to 45 by disrupting four main efflux transporters for Zn/Cd/Pb and thereby causing the metals to accumulate in the cell. The specificity of the bioreporter could be modified by changing the sensor element. A Zn-specific bioreporter was achieved by using the promoter of the cadA1 gene from P. putida as a sensor element. The constructed transporter-deficient P. putida reporter strain detected Zn(2+) concentrations about 50 times lower than that possible with other available Zn-bioreporters. The achieved detection limits were significantly below the permitted limit values for Zn and Pb in water and in soil, allowing for reliable detection of heavy metals in the environment.
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Affiliation(s)
- Anu Hynninen
- Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland.
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