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Martin DE, Muselet D, Kanso H, Alnajjar P, Mexler J, Le Roux Y, Pak LT, Richard A, Charlier JB, Saaidi PL. Analysis of chlordecone and its transformation products in environmental waters by a new SPME-GC-MS method and comparison with LLE-GC-MS/MS and LLE-LC-MS/MS: A case study in the French West Indies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174610. [PMID: 38997033 DOI: 10.1016/j.scitotenv.2024.174610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 07/03/2024] [Accepted: 07/06/2024] [Indexed: 07/14/2024]
Abstract
Among the numerous organochlorines (OCs) applied in the French West Indies (FWI), chlordecone (hydrated form C10Cl10O2H2; CLD) still causes major environmental pollution nowadays. A recent report revealed the unexpected presence in FWI environment of transformation products (TPs) of CLD not routinely monitored due to a lack of commercial standards. Here, we present a method for surface waters and groundwaters to analyze CLD, its main TPs (hydroCLDs, chlordecol (CLDOH), 10-monohydroCLDOH and polychloroindenes) and other OCs. We developed an SPME-GC-SIM/MS method with a PDMS-DVB fiber. Since CLDOH-d commonly used as internal standard (IS) proved unsuitable, we synthesized several IS candidates, and finally identified 10-monohydro-5-methyl-chlordecol as a satisfactory IS for CLDOH and 10-monohydroCLDOH avoiding the use of 13C-labelled analogue. LODs for CLD and its TPs varied from 0.3 to 10 ng/L, equal to or below LODs of the two laboratories, BRGM (the French geological survey) and LDA26 (one of the French Departmental Analytical Laboratories), requested in FWI pollution monitoring that used liquid-liquid extractions and advanced facilities (LLE-GC-MS/MS and LLE-LC-MS/MS methods, respectively). Then, we extended the multi-residue method to 30 OCs (CLD and its TPs, mirex, β-HCH, lindane, dieldrin, aldrin, HCB, hexachlorobutadiene, TCE, PCE) and applied it to 30 surface and ground waters from FWI. While CLD, 8- and 10-monohydroCLD, CLDOH, 10-monohydroCLDOH, dieldrin, and β-HCH were detected and quantified, pentachloroindene, another CLD TP, was sporadically found in trace levels. A comparison with BRGM and LDA26 confirmed the interest of the SPME method. Results suggested an underestimation of CLDOH and an overestimation of high CLD concentrations with one of the currently used routine protocol. In light of these findings, previous temporal monitoring of environmental waters in FWI were re-examined and revealed some atypical values, which may indeed be due to analytical bias. These discrepancies call for intensified efforts to reliably quantify CLD and its TPs.
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Affiliation(s)
- Déborah E Martin
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | - Delphine Muselet
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | - Hussein Kanso
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | - Perla Alnajjar
- Laboratoire Animal et Agroécosystèmes (L2A), Université de Lorraine, INRAE, 54500 Nancy, France; Ecole doctorale en Sciences et Technologie, Université Libanaise, Tripoli, Lebanon
| | - Juliette Mexler
- BRGM, Univ. Montpellier, Montpellier, France; G-eau, INRAE, CIRAD, IRD, AgroParisTech, Institut Agro, BRGM, Montpellier, France
| | - Yves Le Roux
- Laboratoire Animal et Agroécosystèmes (L2A), Université de Lorraine, INRAE, 54500 Nancy, France; Université de Lorraine, ENSAIA, Chaire Industrielle Agrométha, 54505 Vandœuvre-lès-Nancy, France
| | - Lai Ting Pak
- CIRAD, UPR HortSys, F-97285 Le Lamentin, Martinique, France; HortSys, Univ Montpellier, CIRAD, Montpellier, France
| | - Antoine Richard
- INRAE, UR 1321 ASTRO, F-97170 Petit-Bourg, Guadeloupe, France
| | - Jean-Baptiste Charlier
- BRGM, Univ. Montpellier, Montpellier, France; G-eau, INRAE, CIRAD, IRD, AgroParisTech, Institut Agro, BRGM, Montpellier, France.
| | - Pierre-Loïc Saaidi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France.
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Liu J, Zhang X, Yang X, Zhang X, Pan D, Li QX, He J, Wu X. Enhanced Dechlorination of the Herbicide Acetochlor by an Anaerobic Consortium via Sulfate Acclimation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39256187 DOI: 10.1021/acs.jafc.4c03737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Acetochlor residues can contaminate anoxic habitats where anaerobic microbial transformation dominates. Herein, a highly efficient anaerobic acetochlor-degrading consortium ACT6 was enriched using sulfate and acetochlor as selection pressures. The acclimated consortium ACT6 showed an 8.7-fold increase in its ability to degrade acetochlor compared with the initial consortium ACT1. Two degradation pathways of acetochlor were found: reductive dechlorination and thiol-substitution dechlorination in the chloroacetyl group, in which the latter dominated. Acclimation enhanced the abundances of Desulfovibrio, Proteiniclasticum, and Lacrimispora from 0.7 to 28.0% (40-fold), 4.7 to 18.1% (4-fold), and 2.3 to 12.3% (5-fold), respectively, which were positively correlated with sulfate concentrations and acetochlor degradation ability. Three acetochlor-degrading anaerobes were isolated from the acclimated consortium ACT6, namely Cupidesulfovibrio sp. SRB-5, Proteiniclasticum sp. BAD-10, and Lacrimispora sp. BAD-7. This study provides new insights into the anaerobic catabolism of acetochlor and the anaerobic treatment of acetochlor in wastewater.
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Affiliation(s)
- Junwei Liu
- Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
| | - Xuemei Zhang
- Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
| | - Xinyue Yang
- Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
| | - Xuan Zhang
- Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Dandan Pan
- Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, Hawaii 96822, United States
| | - Jian He
- Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiangwei Wu
- Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
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Wang M, Wu B, Zheng Q, Yang P, Hu J, Zheng S. Highly effective removal of 4-chloroaniline in water by nano zero-valent iron cooperated with microbial degradation. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134235. [PMID: 38608585 DOI: 10.1016/j.jhazmat.2024.134235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/28/2024] [Accepted: 04/06/2024] [Indexed: 04/14/2024]
Abstract
The misuse of aromatic amines like 4-chloroaniline (4-CA) has led to severe environmental and health issues. However, it's difficult to be utilized by microorganisms for degradation. Nano-zero-valent iron (nZVI) is a promising material for the remediation of chloroaniline pollution, however, the synergistic effect and mechanism of nZVI with microorganisms for the degradation of 4-CA are still unclear. This study investigated the potential of 4-CA removal by the synergistic system involving nZVI and 4-CA degrading microbial flora. The results indicate that the addition of nZVI significantly enhanced the bio-degradation rate of 4-CA from 43.13 % to 62.26 %. Under conditions involving 0.1 % nZVI addition at a 24-hour interval, pH maintained at 7, and glucose as an external carbon source, the microbial biomass, antioxidant enzymes, and dehydrogenase were significantly increased, and the optimal 4-CA degradation rate achieved 68.79 %. Additionally, gas chromatography-mass spectrometry (GC-MS) analysis of intermediates indicated that the addition of nZVI reduced compounds containing benzene rings and enhanced the dechlorination efficiency. The microbial community remained stable during the 4-CA degradation process. This study illustrates the potential of nZVI in co-microbial remediation of 4-CA compounds in the environment.
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Affiliation(s)
- MeiQi Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Bin Wu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China.
| | - QingJuan Zheng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Peng Yang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - JunQi Hu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Shuai Zheng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
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Martin DE, Alnajjar P, Muselet D, Soligot-Hognon C, Kanso H, Pacaud S, Le Roux Y, Saaidi PL, Feidt C. Efficient biodegradation of the recalcitrant organochlorine pesticide chlordecone under methanogenic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166345. [PMID: 37591382 DOI: 10.1016/j.scitotenv.2023.166345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023]
Abstract
Anaerobic digestion (AD) has long been studied as an effective environmental and economic strategy for treating matrices contaminated with recalcitrant pollutants. In the present work, we investigated the bioremediation potential of AD on organic waste contaminated with chlordecone (CLD), an organochlorine pesticide extensively used in the French West Indies and classified among the most persistent organic pollutants. Digestates from animal and plant origins were supplemented with CLD and incubated under methanogenic conditions for over 40 days. The redox potential and pH monitoring showed that methanogenic conditions were preserved during the entire incubation period despite the presence of CLD. In addition, the comparison of the total biogas generated from digestates with and without CLD demonstrated no adverse effects of CLD on biogas production. For the first time, a QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) extraction method, followed by GC-MS and LC-HRMS analyses, was developed to quantify CLD and its main known transformation products (TPs) in AD experiments. A decrease in CLD concentrations was evident to a greater extent under thermophilic conditions (55 °C) compared to mesophilic conditions (37.5 °C) (CLD removal of 85 % and 42 %, respectively, after 40 days of incubation). CLD degradation was confirmed by the detection and quantification of several TPs: 10-monohydroCLD (A1), two dihydroCLDs different from 2,8-dihydroCLD (A3), pentachloroindene (B1), tetrachloroindenes (B2, B3/B4), tetra- and tri-chloroindenecarboxylic acids (C1/C2, C3/C4). Determining TPs concentrations using the QuEChERS method provided an overview of CLD fate in AD. Overall, these results reveal that AD processes can efficiently degrade CLD into several TPs from A, B, and C families while maintaining satisfactory biogas production. They pave the way to developing a scaled-up AD process capable of treating CLD-contaminated organic wastes produced by farming, thus stopping any further transfer of CLD.
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Affiliation(s)
- Déborah E Martin
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | - Perla Alnajjar
- Université de Lorraine, INRAE, UR AFPA, 54500 Nancy, France; Ecole doctorale en Sciences et Technologie, Université Libanaise, Tripoli, Lebanon
| | - Delphine Muselet
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | | | - Hussein Kanso
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France
| | - Stéphane Pacaud
- Université de Lorraine, ENSAIA, Chaire Industrielle Agrométha, 54505 Vandœuvre-lès-Nancy, France
| | - Yves Le Roux
- Université de Lorraine, INRAE, UR AFPA, 54500 Nancy, France; Université de Lorraine, ENSAIA, Chaire Industrielle Agrométha, 54505 Vandœuvre-lès-Nancy, France.
| | - Pierre-Loïc Saaidi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, Univ Evry, Université Paris-Saclay, Evry, France.
| | - Cyril Feidt
- Université de Lorraine, INRAE, UR AFPA, 54500 Nancy, France
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Sun Z, Liu Y, Hou A, Han A, Yan C, Sun J. Transcriptome and gut microbiota analyses reveal a possible mechanism underlying rifampin-mediated interruption of the larval development of chironomid Propsilocerus akamusi (Diptera: Chironomidae). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 264:115467. [PMID: 37716071 DOI: 10.1016/j.ecoenv.2023.115467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/24/2023] [Accepted: 09/08/2023] [Indexed: 09/18/2023]
Abstract
Chironomids, the most abundant insect group found in freshwater habitats, are known to be pollution tolerate and serve as important bioindicators of contaminant stress. Gut microbiota has recently been shown to potentially provide a number of beneficial services to insect hosts. However, the antibiotic-mediated interruption of chironomid gut microbial community and its subsequent influence on host body are still unclear. In the present study, the effects of rifampin on chironomid larvae were investigated at both transcriptome and microbiome level to assess the relationship between gut bacteria and associated genes. Our data indicated that the rifampin-induced imbalance of gut ecosystem could inhibit the development of chironomid larvae via decreasing the body weight, body length and larval eclosion rate during 96-h treatment. Both the community structure and taxonomic composition were significantly altered due to the invasion of rifampin in digestive tracts. The relative abundance of phylum Deferribacterota and Bacteroidota were dramatically increased with rifampin exposure. A set of genes involved in amino acid synthesis as well as xenobiotic metabolism pathways were greatly changed and proved to have tight correlation with certain genus. Bacterial genus Tyzzerella was positively correlated with detoxifying PaCYP6GF1 and PaCYP9HL1 genes. This study provides a reference for understanding the environmental risks of antibiotic and aims to accelerate new biological insights into the effects of antibiotic on the fitness of chironomids and into the microbe mediated-regulatory mechanism of aquatic insects.
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Affiliation(s)
- Zeyang Sun
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China
| | - Yue Liu
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China
| | - Aoran Hou
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China
| | - Anqi Han
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China
| | - Chuncai Yan
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China.
| | - Jinsheng Sun
- College of Life Sciences, Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity, Tianjin Normal University, Tianjin, China.
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Saaidi PL, Grünberger O, Samouëlian A, Le Roux Y, Richard A, Devault DA, Feidt C, Benoit P, Evrard O, Imfeld G, Mouvet C, Voltz M. Is a dissipation half-life of 5 years for chlordecone in soils of the French West Indies relevant? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 324:121283. [PMID: 36804884 DOI: 10.1016/j.envpol.2023.121283] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/23/2023] [Accepted: 02/11/2023] [Indexed: 06/18/2023]
Abstract
Recently, Comte et al. (2022) re-examined the natural degradation of chlordecone (CLD) in the soils of the French West Indies (FWI) by introducing an additional 'dissipation parameter' into the WISORCH model developed by Cabidoche et al. (2009). Recent data sets of CLD concentrations in FWI soils obtained by Comte et al. enabled them optimizing the model parameters, resulting in significantly shorter estimates of pollution persistence than in the original model. Their conclusions jeopardize the paradigm of a very limited degradation of CLD in FWI soils, which may lead to an entire revision of the management of CLD contamination. However, we believe that their study is questionable on several important aspects. This includes potential biases in the data sets and in the modeling approach. It results in an inconsistency between the estimated dissipation half-life time (DT50) of five years that the authors determined for CLD and the fate of CLD in soil from the application period 1972-1993 until nowadays. Most importantly, a rapid dissipation of CLD in the field as proposed by Comte et al. is not sufficiently supported by data and estimates. Hence, the paradigm of long-term persistence of CLD in FWI soils is still to be considered.
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Affiliation(s)
- Pierre-Loïc Saaidi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91000, Evry, France.
| | - Olivier Grünberger
- Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France
| | - Anatja Samouëlian
- Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France
| | - Yves Le Roux
- Université de Lorraine, INRAE, URAFPA, F-54000 Nancy, France; Université de Lorraine-ENSAIA, Chaire Agrométha, 2 Avenue de la Forêt de Haye, 54500 Vandoeuvre-lès-Nancy, France
| | - Antoine Richard
- UR ASTRO Agrosystème Tropicaux, INRAE, F-97170, Petit-Bourg, France
| | - Damien A Devault
- Département des Sciences et Technologies, Centre Universitaire de Formation et de Recherche de Mayotte, RN3, BP53, 97660, Mayotte, Dembeni, France
| | - Cyril Feidt
- Université de Lorraine, INRAE, URAFPA, F-54000 Nancy, France
| | - Pierre Benoit
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120, Palaiseau, France
| | - Olivier Evrard
- Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212 (CEA-CNRS-UVSQ), Université Paris-Saclay, Gif-sur-Yvette, France
| | - Gwenaël Imfeld
- Université de Strasbourg, CNRS, ENGEES, ITES UMR7063, F-67084 Strasbourg, France
| | - Christophe Mouvet
- Retired from BRGM, Direction Eau, Environnement, Ecotechnologies, Orléans, France
| | - Marc Voltz
- Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France
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Wei X, Peng H, Li Y, Meng B, Wang S, Bi S, Zhao X. Pyrethroids exposure alters the community and function of the internal microbiota in Aedes albopictus. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114579. [PMID: 36706527 DOI: 10.1016/j.ecoenv.2023.114579] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/10/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Large amounts of insecticides bring selection pressure and then develop insecticide resistance in Aedes albopictus. This study demonstrated for the first time the effect of pyrethroid exposure on the internal microbiota in Ae. albopictus. 36, 48, 57 strains of virgin adult Ae. albopictus were exposed to the pyrethroids deltamethrin (Dme group), β-cypermethrin (Bcy group), and cis-permethrin (Cper group), respectively, with n-hexane exposure (Hex group) as the controls (n = 36). The internal microbiota community and functions were analyzed based on the metagenomic analysis. The analysis of similarity (ANOSIM) results showed that the Hex/Bcy (p = 0.001), Hex/Cper (p = 0.006), Hex/Dme (p = 0.001) groups were well separated, and the internal microbes of Ae. albopictus vary in the composition and functions depending on the type of pyrethroid insecticide they are applied. Four short chain fatty acid-producing genera, Butyricimonas, Prevotellaceae, Anaerococcus, Pseudorhodobacter were specifically absent in the pyrethroid-exposed mosquitoes. Morganella and Streptomyces were significantly enriched in cis-permethrin-exposed mosquitoes. Wolbachia and Chryseobacterium showed significant enrichment in β-cypermethrin-exposed mosquitoes. Pseudomonas was significantly abundant in deltamethrin-exposed mosquitoes. The significant proliferation of these bacteria may be closely related to insecticide metabolism. Our study recapitulated a specifically enhanced metabolic networks relevant to the exposure to cis-permethrin and β-cypermethrin, respectively. Benzaldehyde dehydrogenase (EC 1.2.1.28), key enzyme in aromatic compounds metabolism, was detected enhanced in cis-permethrin and β-cypermethrin exposed mosquitoes. The internal microbiota metabolism of aromatic compounds may be important influencing factors for pyrethroid resistance. Future work will be needed to elucidate the specific mechanisms by which mosquito microbiota influences host resistance and vector ability.
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Affiliation(s)
- Xiao Wei
- Centers for Disease Control and Prevention of PLA, Beijing, China
| | - Hong Peng
- Centers for Disease Control and Prevention of PLA, Beijing, China
| | - Yan Li
- Centers for Disease Control and Prevention of PLA, Beijing, China
| | - Biao Meng
- Centers for Disease Control and Prevention of PLA, Beijing, China; Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
| | - Shichao Wang
- Centers for Disease Control and Prevention of PLA, Beijing, China
| | - Shanzheng Bi
- Centers for Disease Control and Prevention of PLA, Beijing, China
| | - Xiangna Zhao
- Centers for Disease Control and Prevention of PLA, Beijing, China; Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China.
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Hellal J, Saaidi PL, Bristeau S, Crampon M, Muselet D, Della-Negra O, Mauffret A, Mouvet C, Joulian C. Microbial Transformation of Chlordecone and Two Transformation Products Formed During in situ Chemical Reduction. Front Microbiol 2021; 12:742039. [PMID: 34803959 PMCID: PMC8600967 DOI: 10.3389/fmicb.2021.742039] [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: 07/15/2021] [Accepted: 09/30/2021] [Indexed: 01/12/2023] Open
Abstract
Chlordecone (CLD) is a very persistent synthetic organochlorine pesticide found in the French West Indies. Recently published work has demonstrated the potential of zero-valent iron to dechlorinate CLD by in situ chemical reduction (ISCR) in soils under water-saturated conditions, forming mono- to penta-dechlorinated CLD transformation products. These transformation products are more mobile than CLD and less toxic; however, nothing is known about their further degradation, although increasing evidence of CLD biodegradation by bacteria is being found. The present study began with the enrichment from wastewater sludge of a CLD-transforming community which was then inoculated into fresh media in the presence of either CLD or two of the main ISCR transformation products, 10-monohydroCLD (-1Cl-CLD) and tri-hydroCLD (-3Cl-CLD). Carried out in triplicate batches and incubated at 38°C under anoxic conditions and in the dark, the cultures were sampled regularly during 3 months and analyzed for CLD, -1Cl-CLD, -3Cl-CLD, and possible transformation products by gas chromatography coupled to mass spectrometry. All batches showed a decrease in the amended substrates (CLD or hydroCLD). CLD degradation occurred with concomitant formation of a nine-carbon compound (pentachloroindene) and two sulfur-containing transformation products (chlordecthiol, CLD-SH; methyl chlordecsulfide, CLD-SCH3), demonstrating competing transformation pathways. In contrast, -1Cl-CLD and -3Cl-CLD only underwent a sequential reductive sulfidation/S-methylation process resulting in -1Cl-CLD-SH and -1Cl-CLD-SCH3 on the one hand, and -3Cl-CLD-SH, -3Cl-CLD-SCH3 on the other hand. Some sulfur-containing transformation products have been reported previously with single bacterial strains, but never in the presence of a complex microbial community. At the end of the experiment, bacterial and archaeal populations were investigated by 16S rRNA gene amplicon sequencing. The observed diversity was mostly similar in the CLD and -1Cl-CLD conditions to the inoculum with a dominant archaea genus, Methanobacterium, and four OTU affiliated to bacteria, identified at the family (Spirochaetaceae) or genus level (Desulfovibrio, Aminobacterium, and Soehngenia). On the other hand, in the -3Cl-CLD condition, although the same OTU were found, Clostridium sensu stricto 7, Candidatus Cloacimonas, and Proteiniphilum were also present at > 2% sequences. Presence of methanogens and sulfate-reducing bacteria could contribute to sulfidation and S-methylation biotransformations. Overall, these results contribute to increasing our knowledge on the biodegradability of CLD and its transformation products, helping to progress toward effective remediation solutions.
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Affiliation(s)
| | - Pierre-Loïc Saaidi
- UMR 8030 Génomique Métabolique, CEA, Institut de Biologie François Jacob, Genoscope, Université d'Evry Val d'Essonne, Université Paris-Saclay, Evry, France
| | | | | | - Delphine Muselet
- UMR 8030 Génomique Métabolique, CEA, Institut de Biologie François Jacob, Genoscope, Université d'Evry Val d'Essonne, Université Paris-Saclay, Evry, France
| | - Oriane Della-Negra
- UMR 8030 Génomique Métabolique, CEA, Institut de Biologie François Jacob, Genoscope, Université d'Evry Val d'Essonne, Université Paris-Saclay, Evry, France
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Della-Negra O, Le Cacher de Bonneville B, Chaussonnerie S, Le Paslier D, Frison G, Saaidi PL. Microbiological versus Chemical Reductive Sulfidation: An Experimental and Theoretical Study. ACS OMEGA 2021; 6:7512-7523. [PMID: 33778263 PMCID: PMC7992082 DOI: 10.1021/acsomega.0c06041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/24/2021] [Indexed: 05/16/2023]
Abstract
Microbiological reductive sulfidation (RS) has rarely been documented, although it represents an efficient strategy for thiol formation. In this work, we reported on the sulfate-respiring bacterium Desulfovibrio sp.86 that has previously demonstrated RS activity toward the pesticide chlordecone. The purpose of this study was to assess its substrate versatility using a set of 28 carbonyls, to compare with chemical RS and to rationalize the observed trends using a dual experimental and theoretical approach. The chemical RS generally proceeds in two steps (S/O exchange using a sulfur donor like P4S10, reduction of the thione intermediate). Intriguingly, chlordecone was found to be converted into chlordecthiol following the first step. Hence, we designed a protocol and applied it to the 28 substrates to assess their propensity to be directly converted into thiols with the P4S10 treatment alone. Finally, we performed density functional theory calculations on these carbonyls and their thiocarbonyl derivatives to build a set of structural, electronic, and thermodynamic parameters. The results showed that chemical and microbiological RS probably involved two distinct mechanisms. Chemically, we observed that several carbonyls, possessing electron-withdrawing groups and/or aromatic rings, were directly transformed into thiols in the presence of P4S10. The correlation obtained with the electron affinity of the thiones led us to conclude that a probable single-electron reductive transfer occurred during the first step. We also found that Desulfovibrio sp.86 transformed a variety of aldehydes and ketones, without ever detecting thiones. No significant correlation was observed with the calculated parameters, but a relationship between aldehyde RS biotransformation and bacterial growth was observed. Differences in selectivity with chemical RS open the way for further applications in organic synthesis.
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Affiliation(s)
- Oriane Della-Negra
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Brieuc Le Cacher de Bonneville
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
- Laboratoire
de Chimie Moléculaire, Ecole Polytechnique, CNRS, IP Paris, 91128 Palaiseau, France
| | - Sébastien Chaussonnerie
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Denis Le Paslier
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Gilles Frison
- Laboratoire
de Chimie Moléculaire, Ecole Polytechnique, CNRS, IP Paris, 91128 Palaiseau, France
- Sorbonne
Université, CNRS, Laboratoire de Chimie Théorique, 75005 Paris, France
| | - Pierre-Loïc Saaidi
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
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Barbance A, Della-Negra O, Chaussonnerie S, Delmas V, Muselet D, Ugarte E, Saaidi PL, Weissenbach J, Fischer C, Le Paslier D, Fonknechten N. Genetic Analysis of Citrobacter sp.86 Reveals Involvement of Corrinoids in Chlordecone and Lindane Biotransformations. Front Microbiol 2020; 11:590061. [PMID: 33240246 PMCID: PMC7680753 DOI: 10.3389/fmicb.2020.590061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/13/2020] [Indexed: 01/21/2023] Open
Abstract
Chlordecone (Kepone®) and γ-hexachlorocyclohexane (γ-HCH or lindane) have been used for decades in the French West Indies (FWI) resulting in long-term soil and water pollution. In a previous work, we have identified a new Citrobacter species (sp.86) that is able to transform chlordecone into numerous products under anaerobic conditions. No homologs to known reductive dehalogenases or other candidate genes were found in the genome sequence of Citrobacter sp.86. However, a complete anaerobic pathway for cobalamin biosynthesis was identified. In this study, we investigated whether cobalamin or intermediates of cobalamin biosynthesis was required for chlordecone microbiological transformation. For this purpose, we constructed a set of four Citrobacter sp.86 mutant strains defective in several genes belonging to the anaerobic cobalamin biosynthesis pathway. We monitored chlordecone and its transformation products (TPs) during long-term incubation in liquid cultures under anaerobic conditions. Chlordecone TPs were detected in the case of cobalamin-producing Citrobacter sp.86 wild-type strain but also in the case of mutants able to produce corrinoids devoid of lower ligand. In contrast, mutants unable to insert the cobalt atom in precorrin-2 did not induce any transformation of chlordecone. In addition, it was found that lindane, previously shown to be anaerobically transformed by Citrobacter freundii without evidence of a mechanism, was also degraded in the presence of the wild-type strain of Citrobacter sp.86. The lindane degradation abilities of the various Citrobacter sp.86 mutant strains paralleled chlordecone transformation. The present study shows the involvement of cobalt-containing corrinoids in the microbial degradation of chlorinated compounds with different chemical structures. Their increased production in contaminated environments could accelerate the decontamination processes.
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Affiliation(s)
- Agnès Barbance
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Oriane Della-Negra
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Sébastien Chaussonnerie
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Valérie Delmas
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Delphine Muselet
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Edgardo Ugarte
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Pierre-Loïc Saaidi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Jean Weissenbach
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Cécile Fischer
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Denis Le Paslier
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
- Denis Le Paslier,
| | - Nuria Fonknechten
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
- Laboratoire de Cancérologie Expérimentale, IRCM, Institut François Jacob, CEA, Université Paris-Saclay, Fontenay aux Roses, France
- *Correspondence: Nuria Fonknechten,
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