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Tunçer Çağlayan S, Gurbanov R. Modulation of bacterial membranes and cellular macromolecules by dimethyl sulfoxide: A dose-dependent study providing novel insights. Int J Biol Macromol 2024; 267:131581. [PMID: 38615866 DOI: 10.1016/j.ijbiomac.2024.131581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/16/2024]
Abstract
Using Escherichia coli as a model, this manuscript delves into the intricate interactions between dimethyl sulfoxide (DMSO) and membranes, cellular macromolecules, and the effects on various aspects of bacterial physiology. Given DMSO's wide-ranging use as a solvent in microbiology, we investigate the impacts of both non-growth inhibitory (1.0 % and 2.5 % v/v) and slightly growth-inhibitory (5.0 % v/v) concentrations of DMSO. The results demonstrate that DMSO causes alterations in bacterial membrane potential, influences the electrochemical characteristics of the cell surface, and exerts substantial effects on the composition and structure of cellular biomolecules. Genome-wide gene expression data from DMSO-treated E. coli was used to further investigate and bolster the results. The findings of this study provide valuable insights into the complex relationship between DMSO and biological systems, with potential implications in drug delivery and cellular manipulation. However, it is essential to exercise caution when utilizing DMSO to enhance the solubility and delivery of bioactive compounds, as even at low concentrations, DMSO exerts non-inert effects on cellular macromolecules and processes.
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Affiliation(s)
- Sinem Tunçer Çağlayan
- Vocational School of Health Services, Department of Medical Services and Techniques, Bilecik Şeyh Edebali University, 11100 Bilecik, Turkey.
| | - Rafig Gurbanov
- Department of Bioengineering, Bilecik Şeyh Edebali University, 11100 Bilecik, Turkey; Central Research Laboratory, Bilecik Şeyh Edebali University, 11100 Bilecik, Turkey
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2
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Non-growth inhibitory doses of dimethyl sulfoxide alter gene expression and epigenetic pattern of bacteria. Appl Microbiol Biotechnol 2022; 107:299-312. [DOI: 10.1007/s00253-022-12296-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 11/02/2022] [Accepted: 11/11/2022] [Indexed: 11/24/2022]
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3
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Ceylani T, Teker HT, Samgane G, Gurbanov R. Intermittent fasting-induced biomolecular modifications in rat tissues detected by ATR-FTIR spectroscopy and machine learning algorithms. Anal Biochem 2022; 654:114825. [DOI: 10.1016/j.ab.2022.114825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 12/16/2022]
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4
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Pareek V, Gupta R, Devineau S, Sivasankaran SK, Bhargava A, Khan MA, Srikumar S, Fanning S, Panwar J. Does Silver in Different Forms Affect Bacterial Susceptibility and Resistance? A Mechanistic Perspective. ACS APPLIED BIO MATERIALS 2022; 5:801-817. [PMID: 35073697 DOI: 10.1021/acsabm.1c01179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The exceptional increase in antibiotic resistance in past decades motivated the scientific community to use silver as a potential antibacterial agent. However, due to its unknown antibacterial mechanism and the pattern of bacterial resistance to silver species, it has not been revolutionized in the health sector. This study deciphers mechanistic aspects of silver species, i.e., ions and lysozyme-coated silver nanoparticles (L-Ag NPs), against E. coli K12 through RNA sequencing analysis. The obtained results support the reservoir nature of nanoparticles for the controlled release of silver ions into bacteria. This study differentiates between the antibacterial mechanism of silver species by discussing the pathway of their entry in bacteria, sequence of events inside cells, and response of bacteria to overcome silver stress. Controlled release of ions from L-Ag NPs not only reduces bacterial growth but also reduces the likelihood of resistance development. Conversely, direct exposure of silver ions, leads to rapid activation of the bacterial defense system leading to development of resistance against silver ions, like the well-known antibiotic resistance problem. These findings provide valuable insight on the mechanism of silver resistance and antibacterial strategies deployed by E. coli K12, which could be a potential target for the generation of aim-based and effective nanoantibiotics.
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Affiliation(s)
- Vikram Pareek
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani 333031, India.,School of Public Health, Physiotherapy and Sports Science, Centre for Food Safety, Science Centre South, University College Dublin, Dublin 4, Ireland
| | - Rinki Gupta
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani 333031, India
| | | | | | - Arpit Bhargava
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani 333031, India
| | - Mohd Azeem Khan
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani 333031, India
| | - Shabrinath Srikumar
- Department of Food, Nutrition and Health, College of Food and Agriculture, UAE University, Al Ain 15551, UAE
| | - Séamus Fanning
- School of Public Health, Physiotherapy and Sports Science, Centre for Food Safety, Science Centre South, University College Dublin, Dublin 4, Ireland.,Institute for Global Food Security, Queen's University Belfast, Belfast BT7 1NN, United Kingdom
| | - Jitendra Panwar
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani 333031, India
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Nogueira MS, Leal LB, Marcarini WD, Pimentel RL, Muller M, Vassallo PF, Campos LCG, Dos Santos L, Luiz WB, Mill JG, Barauna VG, de Carvalho LFDCES. Rapid diagnosis of COVID-19 using FT-IR ATR spectroscopy and machine learning. Sci Rep 2021; 11:15409. [PMID: 34635702 PMCID: PMC8505540 DOI: 10.1038/s41598-021-93511-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 06/10/2021] [Indexed: 12/13/2022] Open
Abstract
Early diagnosis of COVID-19 in suspected patients is essential for contagion control and damage reduction strategies. We investigated the applicability of attenuated total reflection (ATR) Fourier transform infrared (FTIR) spectroscopy associated with machine learning in oropharyngeal swab suspension fluid to predict COVID-19 positive samples. The study included samples of 243 patients from two Brazilian States. Samples were transported by using different viral transport mediums (liquid 1 or 2). Clinical COVID-19 diagnosis was performed by the RT-PCR. We built a classification model based on partial least squares (PLS) associated with cosine k-nearest neighbours (KNN). Our analysis led to 84% and 87% sensitivity, 66% and 64% specificity, and 76.9% and 78.4% accuracy for samples of liquids 1 and 2, respectively. Based on this proof-of-concept study, we believe this method could offer a simple, label-free, cost-effective solution for high-throughput screening of suspect patients for COVID-19 in health care centres and emergency departments.
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Affiliation(s)
- Marcelo Saito Nogueira
- Tyndall National Institute, University College Cork, Lee Maltings Complex, Dyke Parade, Cork, T12R5CP, Ireland.
| | - Leonardo Barbosa Leal
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Wena Dantas Marcarini
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil.,Faculdade Vale do Cricaré, São Matheus, Brazil
| | - Raquel Lemos Pimentel
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Matheus Muller
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | | | | | - Leonardo Dos Santos
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Wilson Barros Luiz
- Department of Biological Science, Santa Cruz State University, Ilhéus, BA, Brazil
| | - José Geraldo Mill
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Valerio Garrone Barauna
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
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Nogueira MS, Leal LB, Marcarini WD, Pimentel RL, Muller M, Vassallo PF, Campos LCG, Dos Santos L, Luiz WB, Mill JG, Barauna VG, de Carvalho LFDCES. Rapid diagnosis of COVID-19 using FT-IR ATR spectroscopy and machine learning. Sci Rep 2021. [PMID: 34635702 DOI: 10.1038/s41598-021-93511-] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2023] Open
Abstract
Early diagnosis of COVID-19 in suspected patients is essential for contagion control and damage reduction strategies. We investigated the applicability of attenuated total reflection (ATR) Fourier transform infrared (FTIR) spectroscopy associated with machine learning in oropharyngeal swab suspension fluid to predict COVID-19 positive samples. The study included samples of 243 patients from two Brazilian States. Samples were transported by using different viral transport mediums (liquid 1 or 2). Clinical COVID-19 diagnosis was performed by the RT-PCR. We built a classification model based on partial least squares (PLS) associated with cosine k-nearest neighbours (KNN). Our analysis led to 84% and 87% sensitivity, 66% and 64% specificity, and 76.9% and 78.4% accuracy for samples of liquids 1 and 2, respectively. Based on this proof-of-concept study, we believe this method could offer a simple, label-free, cost-effective solution for high-throughput screening of suspect patients for COVID-19 in health care centres and emergency departments.
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Affiliation(s)
- Marcelo Saito Nogueira
- Tyndall National Institute, University College Cork, Lee Maltings Complex, Dyke Parade, Cork, T12R5CP, Ireland.
| | - Leonardo Barbosa Leal
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Wena Dantas Marcarini
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
- Faculdade Vale do Cricaré, São Matheus, Brazil
| | - Raquel Lemos Pimentel
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Matheus Muller
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | | | | | - Leonardo Dos Santos
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Wilson Barros Luiz
- Department of Biological Science, Santa Cruz State University, Ilhéus, BA, Brazil
| | - José Geraldo Mill
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - Valerio Garrone Barauna
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
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7
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Gupta AD, Gupta A, Reyes-Calderón A, Merupo VI, Kalita G, Herrera-Celis J, Chandra N, Sharma A, Ramirez JT, Arriaga LG, Oza G. Biological Synthesis of PbS, As 3S 4, HgS, CdS Nanoparticles using Pseudomonas aeruginosa and their Structural, Morphological, Photoluminescence as well as Whole Cell Protein Profiling Studies. J Fluoresc 2021; 31:1445-1459. [PMID: 34268653 DOI: 10.1007/s10895-021-02769-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/30/2021] [Indexed: 10/20/2022]
Abstract
Metal sulfide nanoparticles are semi-conductors that possess many applications in optics, optoelectronics and magnetic devices. There are physical and chemical methods for their synthesis but such methods involve toxic precursors as well as many obnoxious by-products. Hence, biological synthesis of metal sulfide nanoparticles are efficient enough to transform toxic metals to non-toxic ones. Pseudomonas aeruginosa, isolated from textile effluent and tolerant of high levels of heavy metals, was used for the green synthesis of metal sulfide (HgS, As3S4, CdS and PbS) nanoparticles. The optical, structural and morphological nature of metal sulfide nanoparticles was also determined. FTIR (Fourier Transform Infra-red) analysis showed spectral changes when P. aeruginosa was grown in medium containing heavy metals viz. Hg, As, Pb and Cd indicating that there are functional groups viz. carboxyl, hydroxyl, phosphate, amino and amide, that exists on the surface of the bacteria, thus facilitating binding of metals on its surface. The bacterial samples which were treated with different metals at different concentrations, were subjected to whole cell protein analysis using SDS-PAGE (Sodium dodecyl Sulphate- Polyacrylamide gel electrophoresis) and protein profiling. The total protein estimation revealed that there was an increase in the protein concentration in the presence of heavy metals and a significant change in the banding pattern was observed which showed induction of a set of proteins under heavy metal stress especially mercury.
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Affiliation(s)
- Annika Durve Gupta
- Department of Biotechnology, Birla College of Arts, Science and Commerce, Thane Dist, Kalyan, MS, India.
| | - Arvind Gupta
- Bioxia, H-7 Rajlakshmi complex khaler Bhiwandi Thane, Bhiwandi, India
| | - Almendra Reyes-Calderón
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Queretaro, Av. Epigmenio González Fracc. San Pablo, No. 500, 76130, Queretaro, Mexico
| | - Victor Ishrayelu Merupo
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Golap Kalita
- Department of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya, Japan
| | - Jośe Herrera-Celis
- Laboratorio Nacional de Micro Y Nanofluidica (LABMyN), Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Queretaro, 76703, México
| | - Naresh Chandra
- Department of Biotechnology, Birla College of Arts, Science and Commerce, Thane Dist, Kalyan, MS, India
| | - Ashutosh Sharma
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Queretaro, Av. Epigmenio González Fracc. San Pablo, No. 500, 76130, Queretaro, Mexico
| | - Jose Tapia Ramirez
- Department of Genetics and Molecular Biology, Centro de Investigación Y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAVIPN), 0730, Mexico City, Mexico
| | - L G Arriaga
- Laboratorio Nacional de Micro Y Nanofluidica (LABMyN), Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Queretaro, 76703, México
| | - Goldie Oza
- Laboratorio Nacional de Micro Y Nanofluidica (LABMyN), Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Queretaro, 76703, México.
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Gurbanov R, Karadağ H, Karaçam S, Samgane G. Tapioca Starch Modulates Cellular Events in Oral Probiotic Streptococcus salivarius Strains. Probiotics Antimicrob Proteins 2021; 13:195-207. [PMID: 32601954 DOI: 10.1007/s12602-020-09678-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Considering the implications of microbiota in health, scientists are in search of microbiota-oriented strategies for the effective prevention and/or treatment of a wide variety of serious diseases. A microbiota comprises diverse microorganisms with either probiotic or pathogenic properties. The fermentation of prebiotic carbohydrates by probiotic bacteria can affect host metabolism. Therefore, understanding the prebiotic-mediated metabolic modulations in probiotics is crucial to develop functional foods for the improvement of disturbed microbiota. Studies have emphasized the importance of prebiotics in probiotic therapies for mucosal diseases and highlighted the need for extensive research on oral bacteria. In the present study, the cellular events have been studied in batch cultures of probiotic Streptococcus salivarius exposed to the natural prebiotic, tapioca starch (TS). TS modulated the keystone metabolic events in Streptococcus salivarius in a dose-dependent manner. Besides increasing the live cell counts and altering the colony morphologies, TS affected the protein metabolism in terms of cellular expression and conformational changes in protein secondary structures. After treatment with TS, the nucleic acid synthesis increased and B-DNA was more than A- and Z-DNA, together with the diminished fatty acids and increased polysaccharide synthesis. The study results can be considered for the assessment of functional foods and probiotics in oral health.
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Affiliation(s)
- Rafig Gurbanov
- Department of Molecular Biology and Genetics, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey.
- Biotechnology Application and Research Center, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey.
| | - Hazel Karadağ
- Biotechnology Application and Research Center, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey
| | - Sevinç Karaçam
- Biotechnology Application and Research Center, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey
| | - Gizem Samgane
- Biotechnology Application and Research Center, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey
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Pareek V, Devineau S, Sivasankaran SK, Bhargava A, Panwar J, Srikumar S, Fanning S. Silver Nanoparticles Induce a Triclosan-Like Antibacterial Action Mechanism in Multi-Drug Resistant Klebsiella pneumoniae. Front Microbiol 2021; 12:638640. [PMID: 33658987 PMCID: PMC7917072 DOI: 10.3389/fmicb.2021.638640] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 01/20/2021] [Indexed: 12/26/2022] Open
Abstract
Infections associated with antimicrobial-resistant bacteria now represent a significant threat to human health using conventional therapy, necessitating the development of alternate and more effective antibacterial compounds. Silver nanoparticles (Ag NPs) have been proposed as potential antimicrobial agents to combat infections. A complete understanding of their antimicrobial activity is required before these molecules can be used in therapy. Lysozyme coated Ag NPs were synthesized and characterized by TEM-EDS, XRD, UV-vis, FTIR spectroscopy, zeta potential, and oxidative potential assay. Biochemical assays and deep level transcriptional analysis using RNA sequencing were used to decipher how Ag NPs exert their antibacterial action against multi-drug resistant Klebsiella pneumoniae MGH78578. RNAseq data revealed that Ag NPs induced a triclosan-like bactericidal mechanism responsible for the inhibition of the type II fatty acid biosynthesis. Additionally, released Ag+ generated oxidative stress both extra- and intracellularly in K. pneumoniae. The data showed that triclosan-like activity and oxidative stress cumulatively underpinned the antibacterial activity of Ag NPs. This result was confirmed by the analysis of the bactericidal effect of Ag NPs against the isogenic K. pneumoniae MGH78578 ΔsoxS mutant, which exhibits a compromised oxidative stress response compared to the wild type. Silver nanoparticles induce a triclosan-like antibacterial action mechanism in multi-drug resistant K. pneumoniae. This study extends our understanding of anti-Klebsiella mechanisms associated with exposure to Ag NPs. This allowed us to model how bacteria might develop resistance against silver nanoparticles, should the latter be used in therapy.
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Affiliation(s)
- Vikram Pareek
- UCD-Centre for Food Safety, UCD School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, India
| | | | | | - Arpit Bhargava
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, India
| | - Jitendra Panwar
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, India
| | - Shabarinath Srikumar
- Department of Food, Nutrition and Health, College of Food and Agriculture, UAE University, Al Ain, United Arab Emirates
| | - Séamus Fanning
- UCD-Centre for Food Safety, UCD School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland
- Institute for Global Food Security, Queen’s University Belfast, Belfast, United Kingdom
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Gupta AD, Kavitha E, Singh S, Karthikeyan S. Toxicity mechanism of Cu 2+ ion individually and in combination with Zn 2+ ion in characterizing the molecular changes of Staphylococcus aureus studied using FTIR coupled with chemometric analysis. J Biol Phys 2020; 46:395-414. [PMID: 33237339 DOI: 10.1007/s10867-020-09560-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/08/2020] [Indexed: 10/22/2022] Open
Abstract
Copper and zinc have a high binding affinity with a Staphylococcus aureus bacterial community. This causes a change in the biomolecular composition of S. aureus. Our study aims at understanding the resistance mechanism of Cu and Zn either or in various combinations using FTIR and chemometric techniques. Zn toxicity resulted in a significant change in lipid content (3100-2800 cm-1) compared to Cu. A significant decrease in protein content is observed for Cu treatment in the amide region. The bio-concentration factor shows a higher value for Cu compared to Zn. The increase in band area of carbohydrates moieties 1059 cm-1 shows the secretion of EPS due to Cu toxicity. A significant change in nucleic acid compositions was noted in the region1200-900 cm-1 due to Zn treatment. Secondary structural change in protein shows β sheet formation. The result of the finding shows Cu has greater toxicity than Zn. Further toxicity effects were greatly enhanced for metal mixtures ratio (Cu:2Zn). This shows Zn exhibits synergism effect with Cu. The obtained ROC (receiver operating characteristic) curve area gives good reliability of the experiments. The study attempts to understand the mechanism of toxicity removal of Cu and Zn metal mixtures by bacterial population using FTIR coupled with chemometric techniques. Graphical abstract.
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Affiliation(s)
- Annika Durve Gupta
- Department of Biotechnology, B. K. Birla College, Kalyan, Maharashtra, 421304, India
| | - Esakimuthu Kavitha
- Department of Physics, Dr. MGR Educational and Research Institute, Chennai, Tamil Nadu, 600095, India
| | - Shikha Singh
- Department of Biotechnology, B. K. Birla College, Kalyan, Maharashtra, 421304, India
| | - Sivakumaran Karthikeyan
- Department of Physics, Dr. Ambedkar Government Arts College, Chennai, Tamil Nadu, 600039, India.
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Cell-free supernatant of Streptococcus salivarius M18 impairs the pathogenic properties of Pseudomonas aeruginosa and Klebsiella pneumonia. Arch Microbiol 2020; 202:2825-2840. [PMID: 32747998 DOI: 10.1007/s00203-020-02005-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/15/2020] [Accepted: 07/24/2020] [Indexed: 12/17/2022]
Abstract
M18 strain of Streptococcus salivarius is a bacterial replacement probiotic that has been suggested for use in the oral cavity. Here, we have shown that S. salivarius M18 cell-free supernatant reduced the growth of the two most common human pathogens Pseudomonas aeruginosa and Klebsiella pneumonia and sensitized the pathogenic bacteria to antibiotic. Besides, the supernatant inhibited biofilm formation of P. aeruginosa drastically. For pinpointing the biomolecular changes that occurred in P. aeruginosa incubated with the probiotic supernatant, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy was used. Unsupervised learning algorithms, principal component analysis (PCA) and hierarchical cluster analysis (HCA), and intensity analyses of individual spectral bands exhibited comprehensive alterations in the polysaccharide and lipid contents and compositions of P. aeruginosa cultivated with S. salivarius M18 cell-free supernatant. These results indicate that S. salivarius M18 has the potential for the prevention or alleviation of different pathogen-induced infections along with the infections of oral pathogens.
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12
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Gurbanov R, Tunçer S, Mingu S, Severcan F, Gozen AG. Methylation, sugar puckering and Z-form status of DNA from a heavy metal-acclimated freshwater Gordonia sp. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 198:111580. [DOI: 10.1016/j.jphotobiol.2019.111580] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 07/07/2019] [Accepted: 07/29/2019] [Indexed: 01/27/2023]
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