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Harshitha CG, Sharma N, Singh R, Sharma R, Gandhi K, Mann B. Interaction study of aflatoxin M1 with milk proteins using ATR-FTIR. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2023; 60:64-72. [PMID: 36618042 PMCID: PMC9813309 DOI: 10.1007/s13197-022-05587-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/21/2022] [Accepted: 08/28/2022] [Indexed: 01/11/2023]
Abstract
Aflatoxin M1 (AFM1) is a metabolite of carcinogenic aflatoxin B1 (AFB1) and appears in milk of dairy animals on ingestion of feed contaminated with AFB1. It has been reported to have affinity towards milk proteins, the exact mechanism of which is still unknown. In the present study, ATR-FTIR coupled with chemometrics is utilized to understand AFM1 interaction with milk proteins. The second order derivative spectra of the spectral window 1700-1600 cm-1 confirms the affinity of AFM1 towards milk proteins. The results of principal component analysis suggested that spectral window of 1700-1600 cm-1 is informative and provides an indication of the conformational changes brought by AFM1 in the secondary structure of milk proteins. Supplementary Information The online version contains supplementary material available at 10.1007/s13197-022-05587-x.
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Affiliation(s)
| | | | - Richa Singh
- Dairy Chemistry Division, NDRI, Karnal, India
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2
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Wang H, Zhang L, Luo H, Wang X, Tie J, Ren Z. Sterilizing Processes and Mechanisms for Treatment of Escherichia coli with Dielectric-Barrier Discharge Plasma. Appl Environ Microbiol 2019; 86:e01907-19. [PMID: 31628146 PMCID: PMC6912084 DOI: 10.1128/aem.01907-19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 10/13/2019] [Indexed: 11/20/2022] Open
Abstract
With increasing attention toward novel sterilization methods, plasma sterilization has gained more and more interest. However, the underlying mechanisms are still unknown. In this paper, we investigated the inactivation of Escherichia coli using dielectric-barrier discharge (DBD) plasma in saline water. There were three processes shown in the survival curve, namely, during the preparation period, the reaction period, and the saturation period. Observations under a transmission electron microscope (TEM) and detection by Fourier transform infrared spectroscopy (FT-IR) supplied adequate details regarding these processes. Based on these results, we infer that during the preparation period, the main process is the accumulation of chemical substances. During the reaction period, adequate amounts of chemicals decompose and denature cell membranes and macromolecules to kill bacteria in large quantities. During the saturation period, the killing effect decreases because of the protection by clustered cells and the saturation of pH. This study of sterilizing processes systematically reveals the mechanisms of plasma sterilization.IMPORTANCE Compared with traditional methods, plasma sterilization has advantages of high efficiency, easy operation, and environmental protection. This may be more suitable for air and sewage sterilization in specific spaces, such as hospitals, laboratories, and pharmaceutical factories. However, the mechanisms of sterilization are still relatively unknown, especially for bactericidal activities. Knowledge of sterilization processes provides guidance for practical applications. For example, the bactericidal action mainly occurs during the reaction period, and the treatment time can be set based on the reaction period, which could save a lot of energy. The results of this study will help to improve the efficiency of plasma sterilization devices.
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Affiliation(s)
- Hao Wang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Liyang Zhang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Haiyun Luo
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Xinxin Wang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Jinfeng Tie
- PLA Center for Disease Prevention and Control, Beijing, China
| | - Zhe Ren
- PLA Center for Disease Prevention and Control, Beijing, China
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3
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Kuć M, Cieślik-Boczula K, Rospenk M. NIR studies of cholesterol-dependent structural modification of the model lipid bilayer doped with inhalation anesthetics. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Yang Y, Wang J, He H, Zhang W, Zhang Y, Liu J. Influence of Fatty Acid Modification on Uptake of Lovastatin-Loaded Reconstituted High Density Lipoprotein by Foam Cells. Pharm Res 2018; 35:134. [DOI: 10.1007/s11095-018-2419-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 04/23/2018] [Indexed: 02/08/2023]
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Cieślik-Boczula K, Rospenk M. Interaction of anesthetic molecules with α-helix and polyproline II extended helix of long-chain poly-l-lysine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:436-442. [PMID: 28843877 DOI: 10.1016/j.saa.2017.08.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 07/24/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
The effect of halothane, enflurane, sevoflurane, and isoflurane molecules, as volatile anesthetics, on the α-helices and polyproline II extended helices (PPII) of long-chain poly-l-lysine (PLL) were studied using Fourier-transform infrared and vibrational circular dichroism spectroscopy. Uncharged and charged α-helices, as well as charged extended PPII helices, were subjected to anesthetic actions in solvents with different pD values or methanol to water ratios. A crucial factor responsible for hindering the anesthetic-PLL interactions is shown to be the ionization of amino groups of the PLL side chains. The α-helix to β-sheet transition was triggered only for the uncharged α-helical structures of PLL by the nonpolar anesthetics under study.
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Affiliation(s)
| | - Maria Rospenk
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
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6
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Kuć M, Cieślik-Boczula K, Rospenk M. Anesthetic-dependent changes in the chain-melting phase transition of DPPG liposomes studied using near-infrared spectroscopy supported by PCA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 186:37-43. [PMID: 28605687 DOI: 10.1016/j.saa.2017.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/18/2017] [Accepted: 06/05/2017] [Indexed: 06/07/2023]
Abstract
The effect of inhalation anesthetics (enflurane, isoflurane, sevoflurane or halothane) on the lipid chain-melting phase transition of negatively charged phospholipid membranes was studied using near-infrared (NIR) spectroscopy supported by Principal Component Analysis (PCA). NIR spectra of anesthetics-mixed dipalmitoylphosphatidylglycerol (DPPG) membranes were recorded in a range of the first overtone of the symmetric and antisymmetric stretching vibrations of CH2 groups of lipid aliphatic chains as a function of increasing temperature. Anesthetic-dependent changes in the trans to gauche conformers ratio of CH2 groups in the hydrocarbon lipid chains were characterized in detail and compared with the zwitterionic lipid membranes, which were built of dipalmitoylphosphatidylcholine (DPPC) molecules.
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Affiliation(s)
- Marta Kuć
- Faculty of Chemistry, University of Wroclaw, Joliot- Curie 14, 50-383 Wroclaw, Poland
| | | | - Maria Rospenk
- Faculty of Chemistry, University of Wroclaw, Joliot- Curie 14, 50-383 Wroclaw, Poland
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7
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The PPII-to-α-helix transition of poly- l -lysine in methanol/water solvent mixtures accompanied by fibrillar self-aggregation: An influence of fluphenazine molecules. Biophys Chem 2017; 227:14-20. [DOI: 10.1016/j.bpc.2017.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/19/2022]
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8
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Cieślik-Boczula K. Alpha-helix to beta-sheet transition in long-chain poly-l-lysine: Formation of alpha-helical fibrils by poly-l-lysine. Biochimie 2017; 137:106-114. [PMID: 28315381 DOI: 10.1016/j.biochi.2017.03.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/12/2017] [Indexed: 01/06/2023]
Abstract
The temperature-induced α-helix to β-sheet transition in long-chain poly-l-lysine (PLL), accompanied by the gauche-to-trans isomerization of CH2 groups in the hydrocarbon side chains of Lys amino acid residues, and formation of β-sheet as well as α-helix fibrillar aggregates of PLL have been studied using Fourier-transform infrared (FT-IR) and vibrational circular dichroism (VCD) spectroscopy, and transmission electron microscopy (TEM). In a low-temperature alkaline water solution or in a methanol-rich water mixture, the secondary structure of PLL is represented by α-helical conformations with unordered and gauche-rich hydrocarbon side chains. Under these conditions, PLL molecules aggregate into α-helical fibrils. PLLs dominated by extended antiparallel β-sheet structures with highly ordered trans-rich hydrocarbon side chains are formed in a high-temperature range at alkaline pD and aggregate into fibrillar, protofibrillar, and spherical forms. Presented data support the idea that fibrillar aggregation is a varied phenomenon possible in repetitive structural elements with not only a β-sheet-rich conformation, but also an α-helical-rich conformation.
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Zawilska P, Cieślik-Boczula K. Laurdan emission study of the cholesterol-like effect of long-chain alkylresorcinols on the structure of dipalmitoylphosphocholine and sphingomyelin membranes. Biophys Chem 2017; 221:1-9. [DOI: 10.1016/j.bpc.2016.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 11/06/2016] [Accepted: 11/10/2016] [Indexed: 12/22/2022]
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Faghihzadeh F, Anaya NM, Schifman LA, Oyanedel-Craver V. Fourier transform infrared spectroscopy to assess molecular-level changes in microorganisms exposed to nanoparticles. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s41204-016-0001-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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11
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Kuć M, Cieślik-Boczula K, Świątek P, Jaszczyszyn A, Gąsiorowski K, Malinka W. FTIR-ATR study of the influence of the pyrimidine analog of fluphenazine on the chain-melting phase transition of sphingomyelin membranes. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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12
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Cieślik-Boczula K, Czarnik-Matusewicz B, Perevozkina M, Rospenk M. MCR-ALS as an effective tool for monitoring subsequent phase transitions in pure and doped DPPC liposomes. RSC Adv 2015. [DOI: 10.1039/c5ra04234h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
MCR-ALS analysis produces concentration profiles of pure phase states present in heated DPPC liposomes.
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Affiliation(s)
| | | | | | - Maria Rospenk
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
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13
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Conformational changes of l-phenylalanine induced by near infrared radiation. ATR-FTIR studies. Struct Chem 2012. [DOI: 10.1007/s11224-012-0061-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Jiang W, Yang K, Vachet RW, Xing B. Interaction between oxide nanoparticles and biomolecules of the bacterial cell envelope as examined by infrared spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18071-18077. [PMID: 21062006 DOI: 10.1021/la103738e] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The effects of Al(2)O(3), TiO(2), and ZnO nanoparticles (NPs) on bacteria cells and bacterial surface biomolecules were studied by Fourier transform infrared (FTIR) spectroscopy. All the examined biomolecules showed IR spectral changes after NP exposure. Lipopolysaccharide and lipoteichoic acid could bind to oxide NPs through hydrogen bonding and ligand exchange, but the cytotoxicity of NPs seemed largely related to the function-involved or devastating changes to proteins and phospholipids of bacteria. The three NPs decreased the intensity ratio of β-sheets/α-helices, indicating protein structure change, which may affect cell physiological activities. The phosphodiester bond of L-α-phosphatidylethanolamine was broken by ZnO NPs, forming phosphate monoesters and resulting in the highly disordered alkyl chain. Such damage to phospholipid molecular structure may lead to membrane rupture and cell leaking, which is consistent with the fact that ZnO is the most toxic of the three NPs. The cell surface biomolecular changes revealed by FTIR spectra provide a better understanding of the cytotoxicity of oxide NPs.
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Affiliation(s)
- Wei Jiang
- Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, Massachusetts 01003, United States
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15
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Murawska A, Cieślik-Boczula K, Czarnik-Matusewicz B. Interactions in two-component liposomes studied by 2D correlation spectroscopy. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.03.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Cieślik-Boczula K, Szwed J, Jaszczyszyn A, Gasiorowski K, Koll A. Interactions of Dihydrochloride Fluphenazine with DPPC Liposomes: ATR-IR and 31P NMR Studies. J Phys Chem B 2009; 113:15495-502. [DOI: 10.1021/jp904805t] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Katarzyna Cieślik-Boczula
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland, and Department of Basic Medical Science, Wroclaw Medical University, Kochanowskiego 14, 51-601 Wroclaw, Poland
| | - Joanna Szwed
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland, and Department of Basic Medical Science, Wroclaw Medical University, Kochanowskiego 14, 51-601 Wroclaw, Poland
| | - Agata Jaszczyszyn
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland, and Department of Basic Medical Science, Wroclaw Medical University, Kochanowskiego 14, 51-601 Wroclaw, Poland
| | - Kazimierz Gasiorowski
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland, and Department of Basic Medical Science, Wroclaw Medical University, Kochanowskiego 14, 51-601 Wroclaw, Poland
| | - Aleksander Koll
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland, and Department of Basic Medical Science, Wroclaw Medical University, Kochanowskiego 14, 51-601 Wroclaw, Poland
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Cieślik-Boczula K, Koll A. The effect of 3-pentadecylphenol on DPPC bilayers ATR-IR and 31P NMR studies. Biophys Chem 2009; 140:51-6. [DOI: 10.1016/j.bpc.2008.11.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 11/15/2008] [Accepted: 11/17/2008] [Indexed: 10/21/2022]
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18
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Wharton DA, Petrone L, Duncan A, McQuillan AJ. A surface lipid may control the permeability slump associated with entry into anhydrobiosis in the plant parasitic nematode Ditylenchus dipsaci. ACTA ACUST UNITED AC 2008; 211:2901-8. [PMID: 18775927 DOI: 10.1242/jeb.020743] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The anhydrobiotic plant-parasitic nematode Ditylenchus dipsaci undergoes a decrease in permeability (the permeability slump) during the early stages of desiccation and this produces the slow rate of water loss necessary for its survival. There were no changes in annulation spacing, followed in individual nematodes by confocal microscopy, that would account for the permeability slump. Nile Red staining reveals that the surface of the nematode is coated with an extracuticular layer of lipid. This material can be seen in unstained desiccated nematodes where it forms an oil that adheres to the coverslip and to adjacent nematodes. The oily material leaves impressions on the coverslip (cuticle prints) after the nematode has detached upon rehydration. The presence of the surface lipid was confirmed using attenuated total reflection infrared spectroscopy. This material was shown to be a triglyceride and the proportion of fatty acids determined, using thin layer and gas chromatography. The production of the surface lipid material may be responsible for the permeability slump observed during the early phases of desiccation and its removal upon immersion in water may explain the paradox that cuticular permeability decreases during the permeability slump and yet desiccated nematodes are more permeable than are fully hydrated nematodes.
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Affiliation(s)
- D A Wharton
- Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand.
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