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Aslani S, Armstrong DW. High Information Spectroscopic Detection Techniques for Gas Chromatography. J Chromatogr A 2022; 1676:463255. [DOI: 10.1016/j.chroma.2022.463255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 01/14/2023]
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Zanella D, Liden T, York J, Franchina FA, Focant JF, Schug KA. Exploiting targeted and untargeted approaches for the analysis of bacterial metabolites under altered growth conditions. Anal Bioanal Chem 2021; 413:5321-5332. [PMID: 34254157 DOI: 10.1007/s00216-021-03505-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 11/28/2022]
Abstract
In the host, pathogenic microorganisms have developed stress responses to cope with constantly changing environments. Stress responses are directly related to changes in several metabolomic pathways, which could hamper microorganisms' unequivocal identification. We evaluated the effect of various in vitro stress conditions (acidic, basic, oxidative, ethanolic, and saline conditions) on the metabolism of Staphylococcus aureus, Bacillus cereus, and Pseudomonas aeruginosa, which are common lung pathogens. The metabolite profiles of the bacteria were analyzed using liquid chromatography coupled to triple quadrupole and quadrupole time-of-flight mass spectrometry. The advantages of targeted and untargeted analysis combined with univariate and multivariate statistical analysis (principal component analysis, hierarchical cluster analysis, partial least square discriminant analysis, random forest) were combined to unequivocally identify bacterial species. In normal in vitro conditions, the targeted methodology, based on the analysis of primary metabolites, enabled the rapid and efficient discrimination of the three bacteria. In changing in vitro conditions and specifically in presence of the various stressors, the untargeted methodology proved to be more valuable for the global and accurate differentiation of the three bacteria, also considering the type of stress environment within each species. In addition, species-specific metabolites (i.e., fatty acids, polysaccharides, peptides, and nucleotide bases derivatives) were putatively identified. Good intra-day repeatability and inter-day repeatability (< 10% RSD and < 15% RSD, respectively) were obtained for the targeted and the untargeted methods. This untargeted approach highlights its importance in unusual (and less known) bacterial growth environments, being a powerful tool for infectious disease diagnosis, where the accurate classification of microorganisms is sought.
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Affiliation(s)
- Delphine Zanella
- Molecular System, Organic & Biological Analytical Chemistry Group, University of Liege, 11 Allee du Six Aout, 4000, Liege, Belgium
| | - Tiffany Liden
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Box 19065, Arlington, TX, 76019, USA
| | - Jamie York
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Box 19065, Arlington, TX, 76019, USA
| | - Flavio A Franchina
- Molecular System, Organic & Biological Analytical Chemistry Group, University of Liege, 11 Allee du Six Aout, 4000, Liege, Belgium
| | - Jean-François Focant
- Molecular System, Organic & Biological Analytical Chemistry Group, University of Liege, 11 Allee du Six Aout, 4000, Liege, Belgium
| | - Kevin A Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Box 19065, Arlington, TX, 76019, USA. .,Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation, The University of Texas at Arlington, Arlington, TX, 76019, USA.
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Li J, Rumancev C, Lutze HV, Schmidt TC, Rosenhahn A, Schmitz OJ. Effect of ozone stress on the intracellular metabolites from Cobetia marina. Anal Bioanal Chem 2020; 412:5853-5861. [PMID: 32676676 PMCID: PMC7413921 DOI: 10.1007/s00216-020-02810-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 01/04/2023]
Abstract
A GCxGC-MS system was employed with a non-polar × mid-polar column set for the metabolic non-target analysis of Cobetia marina, the model bacteria for marine biofouling. C. marina was treated with ozone to investigate the intracellular metabolic state change under oxidative stress. A minimal inhibitory concentration test was involved to guarantee that the applied ozone dosages were not lethal for the cells. In this study, non-target analyses were performed to identify the metabolites according to the NIST database. As a result, over 170 signals were detected under normal living conditions including 35 potential metabolites. By the comparison of ozone-treated and non-treated samples, five compounds were selected to describe observed trends of signals in the contour plots. Oleic acid exhibited a slight growth by increasing ozone dosage. In contrast, other metabolites such as the amino acid L-proline showed less abundance after ozone treatment, which was more evident once ozone dosage was raised. Thus, this work could provide a hint for searching for up/downregulating factors in such environmental stress conditions for C. marina. Graphical abstract.
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Affiliation(s)
- Junjie Li
- Applied Analytical Chemistry & Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141, Essen, Germany
| | - Christoph Rumancev
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Universitaetsstr. 150, 44780, Bochum, Germany
| | - Holger V Lutze
- Instrumental Analytical Chemistry and Centre for Environmental and Water Research (ZWU), University of Duisburg-Essen, Universitaetsstr. 5, 45141, Essen, Germany.,Technical University of Darmstadt, Department of Civil and Environmental Engineering, Institut IWAR, Franziska Braun Str. 7, 64287, Darmstadt, Germany.,IWW Water Centre, Moritzstr. 26, 45476, Mülheim an der Ruhr, Germany
| | - Torsten C Schmidt
- Instrumental Analytical Chemistry and Centre for Environmental and Water Research (ZWU), University of Duisburg-Essen, Universitaetsstr. 5, 45141, Essen, Germany.,IWW Water Centre, Moritzstr. 26, 45476, Mülheim an der Ruhr, Germany
| | - Axel Rosenhahn
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Universitaetsstr. 150, 44780, Bochum, Germany
| | - Oliver J Schmitz
- Applied Analytical Chemistry & Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141, Essen, Germany.
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Zhang JL, Bai QY, Peng YZ, Fan J, Jin CC, Cao YX, Yuan YJ. High production of triterpenoids in Yarrowia lipolytica through manipulation of lipid components. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:133. [PMID: 32760447 PMCID: PMC7392732 DOI: 10.1186/s13068-020-01773-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/20/2020] [Indexed: 05/22/2023]
Abstract
BACKGROUND Lupeol exhibits novel physiological and pharmacological activities, such as anticancer and immunity-enhancing activities. However, cytotoxicity remains a challenge for triterpenoid overproduction in microbial cell factories. As lipophilic and relatively small molecular compounds, triterpenes are generally secreted into the extracellular space. The effect of increasing triterpene efflux on the synthesis capacity remains unknown. RESULTS In this study, we developed a strategy to enhance triterpene efflux through manipulation of lipid components in Y. lipolytica by overexpressing the enzyme Δ9-fatty acid desaturase (OLE1) and disturbing phosphatidic acid phosphatase (PAH1) and diacylglycerol kinase (DGK1). By this strategy combined with two-phase fermentation, the highest lupeol production reported to date was achieved, where the titer in the organic phase reached 381.67 mg/L and the total production was 411.72 mg/L in shake flasks, exhibiting a 33.20-fold improvement over the initial strain. Lipid manipulation led to a twofold increase in the unsaturated fatty acid (UFA) content, up to 61-73%, and an exceptionally elongated cell morphology, which might have been caused by enhanced membrane phospholipid biosynthesis flux. Both phenotypes accelerated the export of toxic products to the extracellular space and ultimately stimulated the capacity for triterpenoid synthesis, which was proven by the 5.11-fold higher ratio of extra/intracellular lupeol concentrations, 2.79-fold higher biomass accumulation and 2.56-fold higher lupeol productivity per unit OD in the modified strains. This strategy was also highly efficient for the biosynthesis of other triterpenes and sesquiterpenes, including α-amyrin, β-amyrin, longifolene, longipinene and longicyclene. CONCLUSIONS In conclusion, we successfully created a high-yield lupeol-producing strain via lipid manipulation. We demonstrated that the enhancement of lupeol efflux and synthesis capacity was induced by the increased UFA content and elongated cell morphology. Our study provides a novel strategy to promote the biosynthesis of valuable but toxic products in microbial cell factories.
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Affiliation(s)
- Jin-Lai Zhang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Qiu-Yan Bai
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Yang-Zi Peng
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Jie Fan
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Cong-Cong Jin
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Ying-Xiu Cao
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
| | - Ying-Jin Yuan
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072 China
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Lelevic A, Souchon V, Moreaud M, Lorentz C, Geantet C. Gas chromatography vacuum ultraviolet spectroscopy: A review. J Sep Sci 2019; 43:150-173. [PMID: 31750981 DOI: 10.1002/jssc.201900770] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/13/2019] [Accepted: 11/15/2019] [Indexed: 11/12/2022]
Abstract
Accelerated technological progress and increased complexity of interrogated matrices imposes a demand for fast, powerful, and resolutive analysis techniques. Gas chromatography has been for a long time a 'go-to' technique for the analysis of mixtures of volatile and semi-volatile compounds. Coupling of the several dimensions of gas chromatography separation has allowed to access a realm of improved separations in the terms of increased separation power and detection sensitivity. Especially comprehensive separations offer an insight into detailed sample composition for complex samples. Combining these advanced separation techniques with an informative detection system such as vacuum ultraviolet spectroscopy is therefore of great interest. Almost all molecules absorb the vacuum ultraviolet radiation and have distinct spectral features with compound classes exhibiting spectral signature similarities. Spectral information can be 'filtered' to extract the response in the most informative spectral ranges. Developed algorithms allow spectral mixture estimation of coeluting species. Vacuum ultraviolet detector follows Beer-Lambert law, with the possibility of calibrationless quantitation. The purpose of this article is to provide an overview of the features and specificities of gas chromatography-vacuum ultraviolet spectroscopy coupling which has gained interest since the recent introduction of a commercial vacuum ultraviolet detector. Potentials and limitations, relevant theoretical considerations, recent advances and applications are explored.
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Affiliation(s)
- Aleksandra Lelevic
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360, Solaize, France.,IRCELYON, UMR5256 CNRS-UCB Lyon 1, Villeurbanne Cedex, France
| | - Vincent Souchon
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360, Solaize, France
| | - Maxime Moreaud
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360, Solaize, France.,MINESParisTech, PSL-ResearchUniversity, CMM, Fontainebleau, France
| | - Chantal Lorentz
- IRCELYON, UMR5256 CNRS-UCB Lyon 1, Villeurbanne Cedex, France
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Ozdal M. A new strategy for the efficient production of pyocyanin, a versatile pigment, in Pseudomonas aeruginosa OG1 via toluene addition. 3 Biotech 2019; 9:374. [PMID: 31588398 DOI: 10.1007/s13205-019-1907-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 09/19/2019] [Indexed: 11/24/2022] Open
Abstract
Pseudomonas aeruginosa produce pyocyanin, which is an extracellular secondary metabolite and multifunctional pigment. In this study, the effects of several surfactants (Tween 20, Tween 80 and Triton X-100) and organic solvents (toluene and chloroform) on pyocyanin production and cell growth were investigated in submerged culture of P. aeruginosa OG1. Organic solvents were found to be more effective in the production of pyocyanin. The maximum production of pyocyanin (33 mg/L) was achieved when 0.2% toluene was added at the stationary growth phase (30 h), corresponding to significant increase of 312% compared with the control (8 mg/L). With the addition of toluene, pyocyanin production was significantly increased, but bacterial biomass reduced. Production of alkaline protease was also affected by toluene addition. It was found that the ratio of saturated/unsaturated fatty acids in the bacterial biomass significantly increased when toluene addition to the medium. This study revealed that with a novel strategy, the addition of toluene to the fermentation medium significantly increased pyocyanin production. These findings suggest that solvent-assisted fermentation strategy can be used in microbial fermentations to increase the production of biotechnological products such as industrially important pigment and enzyme. This study is a first investigation on the stimulation of pyocyanin release in the medium of P. aeruginosa cultures by the addition of toluene.
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Affiliation(s)
- Murat Ozdal
- Department of Biology, Science Faculty, Ataturk University, Erzurum, 25240 Turkey
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Anderson HE, Santos IC, Hildenbrand ZL, Schug KA. A review of the analytical methods used for beer ingredient and finished product analysis and quality control. Anal Chim Acta 2019; 1085:1-20. [PMID: 31522723 DOI: 10.1016/j.aca.2019.07.061] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 07/28/2019] [Accepted: 07/29/2019] [Indexed: 12/30/2022]
Abstract
Beer is an incredibly complex beverage containing more than 3000 different compounds, including carbohydrates, proteins, ions, microbes, organic acids, and polyphenols, among others. Beer becomes even more complex during storage, for over time it may undergo chemical changes that negatively affect the flavor, aroma, and appearance. Thus, it can be expected that maintaining the quality of beer throughout its lifetime is a difficult task. Since it is such a popular drink throughout the world, being familiar with proper analytical techniques for beer evaluation is useful for researchers and brewers. These techniques include, but are not limited to, gas chromatography, liquid chromatography, matrix assisted laser desorption/ionization, capillary electrophoresis, mass spectrometry, ultraviolet-visible spectroscopy, and flame ionization detection. This review aims to summarize the various ingredients and components of beer, discuss how they affect the finished product, and present some of the analytical methods used for quality control and understanding the formation of chemicals in beer during the brewing process.
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Affiliation(s)
- Hailee E Anderson
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX, 76019, USA
| | - Ines C Santos
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX, 76019, USA; Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation, The University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Zacariah L Hildenbrand
- Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation, The University of Texas at Arlington, Arlington, TX, 76019, USA; Inform Environmental, LLC, 6060 N. Central Expressway, Suite 500, Dallas, TX, 75206, USA
| | - Kevin A Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX, 76019, USA; Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation, The University of Texas at Arlington, Arlington, TX, 76019, USA.
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8
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Toluene degradation via a unique metabolic route in indigenous bacterial species. Arch Microbiol 2019; 201:1369-1383. [PMID: 31332474 DOI: 10.1007/s00203-019-01705-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/27/2019] [Accepted: 07/10/2019] [Indexed: 12/30/2022]
Abstract
Tanneries are the primary source of toluene pollution in the environment and toluene due to its hazardous effects has been categorized as persistent organic pollutant. Present study was initiated to trace out metabolic fingerprints of three toluene-degrading bacteria isolated from tannery effluents of Southern Punjab. Using selective enrichment and serial dilution methods followed by biochemical, molecular and antibiotic resistance analysis, isolated bacteria were subjected to metabolomics analysis. GC-MS/LC-MS analysis of bacterial metabolites helped to identify toluene transformation products and underlying pathways. Three toluene-metabolizing bacteria identified as Bacillus paralicheniformis strain KJ-16 (IUBT4 and IUBT24) and Brevibacillus agri strain NBRC 15538 (IUBT19) were found tolerant to toluene and capable of degrading toluene. Toluene-degrading potential of these isolates was detected to be IUBT4 (10.35 ± 0.084 mg/h), IUBT19 (14.07 ± 3.14 mg/h) and IUBT24 (11.1 ± 0.282 mg/h). Results of GC-MS analysis revealed that biotransformation of toluene is accomplished not only through known metabolic routes such as toluene 3-monooxygenase (T3MO), toluene 2-monooxygenase (T2MO), toluene 4-monooxygenase (T4MO), toluene methyl monooxygenase (TOL), toluene dioxygenase (Tod), meta- and ortho-ring fission pathways. But additionally, confirmed existence of a unique metabolic pathway that involved conversion of toluene into intermediates such as cyclohexene, cyclohexane, cyclohexanone and cyclohexanol. LC-MS analysis indicated the presence of fatty acid amides, stigmine, emmotin A and 2, 2-dinitropropanol in supernatants of bacterial cultures. As the isolated bacteria transformed toluene into relatively less toxic molecules and thus can be preferably exploited for the eco-friendly remediation of toluene.
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Santos IC, Hildenbrand ZL, Schug KA. A Review of Analytical Methods for Characterizing the Potential Environmental Impacts of Unconventional Oil and Gas Development. Anal Chem 2018; 91:689-703. [PMID: 30392348 DOI: 10.1021/acs.analchem.8b04750] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Inês C Santos
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , 700 Planetarium Place , Arlington , Texas 76019 , United States.,Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Zacariah L Hildenbrand
- Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation , The University of Texas at Arlington , Arlington , Texas 76019 , United States.,Inform Environmental, LLC , 6060 N. Central Expressway, Suite 500 , Dallas , Texas 75206 , United States
| | - Kevin A Schug
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , 700 Planetarium Place , Arlington , Texas 76019 , United States.,Affiliate of Collaborative Laboratories for Environmental Analysis and Remediation , The University of Texas at Arlington , Arlington , Texas 76019 , United States
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