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Dhar R, Basu S, Bhattacharyya M, Dutta TK. Evaluation of distinct molecular architectures and coordinated regulation of the catabolic pathways of oestrogenic dioctyl phthalate isomers in Gordonia sp. Microbiology (Reading) 2023; 169:001353. [PMID: 37384374 PMCID: PMC10333787 DOI: 10.1099/mic.0.001353] [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: 04/05/2023] [Accepted: 06/12/2023] [Indexed: 06/30/2023]
Abstract
Bacterial strain GONU, belonging to the genus Gordonia, was isolated from a municipal waste-contaminated soil sample and was capable of utilizing an array of endocrine-disrupting phthalate diesters, including di-n-octyl phthalate (DnOP) and its isomer di(2-ethylhexyl) phthalate (DEHP), as the sole carbon and energy sources. The biochemical pathways of the degradation of DnOP and DEHP were evaluated in strain GONU by using a combination of various chromatographic, spectrometric and enzymatic analyses. Further, the upregulation of three different esterases (estG2, estG3 and estG5), a phthalic acid (PA)-metabolizing pht operon and a protocatechuic acid (PCA)-metabolizing pca operon were revealed based on de novo whole genome sequence information and substrate-induced protein profiling by LC-ESI-MS/MS analysis followed by differential gene expression by real-time PCR. Subsequently, functional characterization of the differentially upregulated esterases on the inducible hydrolytic metabolism of DnOP and DEHP revealed that EstG5 is involved in the hydrolysis of DnOP to PA, whereas EstG2 and EstG3 are involved in the metabolism of DEHP to PA. Finally, gene knockout experiments further validated the role of EstG2 and EstG5, and the present study deciphered the inducible regulation of the specific genes and operons in the assimilation of DOP isomers.
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Affiliation(s)
- Rinita Dhar
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata – 700091, West Bengal, India
| | - Suman Basu
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata – 700091, West Bengal, India
| | - Mousumi Bhattacharyya
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata – 700091, West Bengal, India
| | - Tapan K. Dutta
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata – 700091, West Bengal, India
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Rama V, Muruganantham B, Devaki K, Muthusami S. Molecular docking analysis of estrogen receptor binding phytocomponents identified from the ethyl acetate extract of Salicornia herbacea (L). Bioinformation 2022; 18:273-283. [PMID: 36518129 PMCID: PMC9722414 DOI: 10.6026/97320630018273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 03/31/2022] [Accepted: 03/31/2022] [Indexed: 09/19/2023] Open
Abstract
It is of interest to evaluate the secondary metabolites using high performance thin layer chromatography (HPTLC) finger printing and Gas chromatography-Mass spectroscopy (GC-MS) in S. herbaceaextract. The powdered plant material extracted using different solvents were used for the qualitative analysis of alkaloids, flavonoids, terpenoids and saponins followed by HPTLC finger printing and GC-MS analysis. The components identified in the GC-MS were docked with estrogen receptor (ER) to identify the binding specificity of isolated compounds. The ethyl acetate extract of S. herbaceashowed the presence of high number of secondary metabolites when compared to other solvent system. The qualitative analysis of the plant material also showed the presence of carbohydrates, protein, amino acid, phenol, flavonoids, terpenoids, glycosides, saponins and steroids. The HPTLC finger printing analysis revealed the existence of alkaloid, flavonoid, terpenoid and saponin compounds and GC-MS. GC-MS was performed to identify the phytocomponents constituents in the extract. 8 phytocompounds were identified to analyse binding with ER. The binding affinity score (-6.8 kcal/mol) and interacting ER residues (28) the phyto compound di-n-octyl phthalate showed best docking score with ER α than the standard drugs lasofoxifene, and 4-hydroxytamoxifen. The binding affinity and number of interacting ER residues was -6.9 kcal/mol; 10 and -6.2; 11, respectively. The results identified the presence of ER antagonist in S. herbaceaand warrants further investigation to explore for treating ER regulated diseases.
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Affiliation(s)
- Venkatesan Rama
- Department of Biochemistry, Karpagam Academy of Higher Education, Tamil Nadu, Coimbatore 641 021, India
- Department of Biochemistry, Vivekanandha College of Arts & Sciences for Women (Autonomous), Tiruchengode - 637205, India
| | - Bharathi Muruganantham
- Department of Biochemistry, Karpagam Academy of Higher Education, Tamil Nadu, Coimbatore 641 021, India
| | - Kanakasabapathi Devaki
- Department of Biochemistry, Karpagam Academy of Higher Education, Tamil Nadu, Coimbatore 641 021, India
| | - Sridhar Muthusami
- Department of Biochemistry, Karpagam Academy of Higher Education, Tamil Nadu, Coimbatore 641 021, India
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Wang Y, Zhan W, Liu Y, Cheng S, Zhang C, Ma J, Chen R. Di- n-octyl phthalate degradation by a halotolerant bacterial consortium LF and its application in soil. Environ Technol 2021; 42:2749-2756. [PMID: 31961776 DOI: 10.1080/09593330.2020.1713903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 09/18/2019] [Accepted: 01/04/2020] [Indexed: 06/10/2023]
Abstract
Di-n-octyl phthalate (DOP), a plasticizer used in many different industrial products, is a frequently observed pollutant in the environment. Biodegradation by microorganisms is considered to be a realistic choice for the remediation of DOP contamination. In the present research, the halotolerant bacterial consortium (LF) enriched in our previous research was used to degrade DOP. It was found that the optimal conditions for LF to degrade DOP was temperature 30oC, pH 6.0, inoculum size >5%, and salt content <3%. LF could degrade a high concentration of DOP (2000 mg/L) with the removal efficiency of 96.33%. Substrate inhibition analyses indicated that the inhibition constant, maximum specific degradation rate and half-saturation constant were 2544.6 mg/L, 0.7 d-1 and 59.1 mg/L, respectively. Based on the analysis of the gas chromatography-mass spectrometry (GC-MS), the biodegradation pathway for DOP by LF was proposed. Furthermore, LF could degrade DOP in soil (100 mg/kg) with the highest removal efficiency of 89.3%. This study is the first report on DOP biodegradation by bacterial consortium. These results suggest that LF can be used to remediate DOP-contaminated environment.
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Affiliation(s)
- Yangyang Wang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions (Henan University), Ministry of Education, Kaifeng, Henan, People's Republic of China
- Key Research Institute of Yellow River Civilization and Sustainable Development & Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng, People's Republic of China
| | - Wenhao Zhan
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, People's Republic of China
| | - Yidan Liu
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Shanshan Cheng
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Chaosheng Zhang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Jianhua Ma
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Runhua Chen
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, People's Republic of China
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Lewis RC, Meeker JD, Peterson KE, Lee JM, Pace GG, Cantoral A, Téllez-Rojo MM. Predictors of urinary bisphenol A and phthalate metabolite concentrations in Mexican children. Chemosphere 2013; 93:2390-8. [PMID: 24041567 PMCID: PMC3818401 DOI: 10.1016/j.chemosphere.2013.08.038] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/05/2013] [Accepted: 08/10/2013] [Indexed: 05/18/2023]
Abstract
Exposure to endocrine disrupting chemicals such as bisphenol A (BPA) and phthalates is prevalent among children and adolescents, but little is known regarding important sources of exposure at these sensitive life stages. In this study, we measured urinary concentrations of BPA and nine phthalate metabolites in 108 Mexican children aged 8-13 years. Associations of age, time of day, and questionnaire items on external environment, water use, and food container use with specific gravity-corrected urinary concentrations were assessed, as were questionnaire items concerning the use of 17 personal care products in the past 48-h. As a secondary aim, third trimester urinary concentrations were measured in 99 mothers of these children, and the relationship between specific gravity-corrected urinary concentrations at these two time points was explored. After adjusting for potential confounding by other personal care product use in the past 48-h, there were statistically significant (p<0.05) positive associations in boys for cologne/perfume use and monoethyl phthalate (MEP), mono(3-carboxypropyl) phthalate (MCPP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), and mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and in girls for colored cosmetics use and mono-n-butyl phthalate (MBP), mono(2-ethylhexyl) phthalate (MEHP), MEHHP, MEOHP, and mono(2-ethyl-5-carboxypentyl) phthalate (MECPP), conditioner use and MEP, deodorant use and MEP, and other hair products use and MBP. There was a statistically significant positive trend for the number of personal care products used in the past 48-h and log-MEP in girls. However, there were no statistically significant associations between the analytes and the other questionnaire items and there were no strong correlations between the analytes measured during the third trimester and at 8-13 years of age. We demonstrated that personal care product use is associated with exposure to multiple phthalates in children. Due to rapid development, children may be susceptible to impacts from exposure to endocrine disrupting chemicals; thus, reduced or delayed use of certain personal care products among children may be warranted.
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Affiliation(s)
- Ryan C. Lewis
- University of Michigan School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, USA
| | - John D. Meeker
- University of Michigan School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, USA
- Corresponding author: John D. Meeker, Sc.D., University of Michigan School of Public Health, Department of Environmental Health Sciences, M6017 SPH II, 1415 Washington Heights, Ann Arbor, MI 48109, , telephone: 1.734.764.7184, fax: 1.734.936.7283
| | - Karen E. Peterson
- University of Michigan School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, USA
- University of Michigan, Center for Human Growth and Development, Ann Arbor, MI, USA
- Harvard School of Public Health, Department of Nutrition, Boston, MA, USA
| | - Joyce M. Lee
- University of Michigan School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, USA
- University of Michigan, Pediatric Endocrinology, Child Health Evaluation and Research Unit (CHEAR), Ann Arbor, MI, USA
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