1
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Algethami FK, Rabti A, Mastouri M, Ben Aoun S, Alqarni LS, Elamin MR, Raouafi N. Sub-femtomolar capacitance-based biosensing of kanamycin using screen-printed electrodes coated with redox-active polymeric films. Mikrochim Acta 2023; 190:434. [PMID: 37821740 DOI: 10.1007/s00604-023-06003-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/16/2023] [Indexed: 10/13/2023]
Abstract
An ultrasensitive capacitance-based biosensor has been developed capable of detecting the kanamycin (KAN) antibiotic at sub-femtomolar levels. The biosensor was constructed using a potential-pulse-assisted method, allowing for the layer-by-layer deposition of a melanin-like polymeric film (MLPF) on an electrode surface modified with gold nanoparticles (AuNPs). The MLPF was formed through the electrochemical polymerization of dopamine and the specific kanamycin aptamer. By optimizing the operating parameters, we achieved a label-free detection of kanamycin by monitoring the variation of pseudocapacitive properties of the MLPF-modified electrode using electrochemical impedance spectroscopy. The developed biosensor demonstrated a wide linear response ranging from 1 fM to 100 pM, with a remarkable limit of detection of 0.3 fM (S/N = 3) for kanamycin. Furthermore, the biosensor was successfully applied to detect kanamycin in milk samples, exhibiting good recovery. These findings highlight the promising potential of the aptasensor for determination of antibiotic residues and ensuring food safety. In conclusion, our ultrasensitive capacitance-based biosensor provides a reliable and efficient method for detecting trace amounts of kanamycin in dairy products. This technology can contribute to safeguarding consumer health and maintaining high food safety standards.
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Affiliation(s)
- Faisal K Algethami
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia.
| | - Amal Rabti
- Laboratory of Materials, Treatment, and Analysis (LMTA), National Institute of Research and Physicochemical Analysis (INRAP), Biotechpole Sidi Thabet, 2020, Sidi Thabet, Tunisia
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Mohamed Mastouri
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Sami Ben Aoun
- Department of Chemistry, Faculty of Science, Taibah University, P.O Box 30002, Al-Madinah Al-Munawwarah, Saudi Arabia
| | - Laila S Alqarni
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia
| | - Mohamed R Elamin
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia
| | - Noureddine Raouafi
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia.
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2
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Yeh CW, Feng CC, Chen PL, Jhou YJ, Hou DR. Enantioselective Synthesis of Nabscessin C. J Org Chem 2023; 88:13528-13534. [PMID: 37681712 DOI: 10.1021/acs.joc.3c01064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Enantioselective synthesis of nabscessin C (1), an aminocyclitol amide with antimicrobial activity, is reported. Starting from myo-inositol, (+)-nabscessin C was synthesized in 12 isolation steps. Desymmetrization of 2-deoxygenated 4,6-dibenzylinositol was achieved using lipase from porcine pancreas (PPL), and the stereochemistry was established by X-ray crystallography. This method has the potential for synthesizing other cyclitol-derived compounds.
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Affiliation(s)
- Chun-Wei Yeh
- Department of Chemistry, National Central University, 300 Jhong-Da Road, Jhong-Li, Taoyuan 320317, Taiwan
| | - Chia-Chi Feng
- Department of Chemistry, National Central University, 300 Jhong-Da Road, Jhong-Li, Taoyuan 320317, Taiwan
| | - Pei-Lin Chen
- Instrument Center, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Yi-Jhen Jhou
- Department of Chemistry, National Central University, 300 Jhong-Da Road, Jhong-Li, Taoyuan 320317, Taiwan
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, 300 Jhong-Da Road, Jhong-Li, Taoyuan 320317, Taiwan
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3
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Ngo D, Magaña AJ, Tran T, Sklenicka J, Phan K, Eykholt B, Jimenez V, Ramirez MS, Tolmasky ME. Inhibition of Enzymatic Acetylation-Mediated Resistance to Plazomicin by Silver Ions. Pharmaceuticals (Basel) 2023; 16:236. [PMID: 37259383 PMCID: PMC9966628 DOI: 10.3390/ph16020236] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/28/2023] [Accepted: 01/31/2023] [Indexed: 03/24/2024] Open
Abstract
Plazomicin is a recent U.S. Food and Drug Administration (FDA)-approved semisynthetic aminoglycoside. Its structure consists of a sisomicin scaffold modified by adding a 2(S)-hydroxy aminobutyryl group at the N1 position and a hydroxyethyl substituent at the 6' position. These substitutions produced a molecule refractory to most aminoglycoside-modifying enzymes. The main enzyme within this group that recognizes plazomicin as substrate is the aminoglycoside 2'-N-acetyltransferase type Ia [AAC(2')-Ia], which reduces the antibiotic's potency. Designing formulations that combine an antimicrobial with an inhibitor of resistance is a recognized strategy to extend the useful life of existing antibiotics. We have recently found that several metal ions inhibit the enzymatic inactivation of numerous aminoglycosides mediated by the aminoglycoside 6'-N-acetyltransferase type Ib [AAC(6')-Ib]. In particular, Ag+, which also enhances the effect of aminoglycosides by other mechanisms, is very effective in interfering with AAC(6')-Ib-mediated resistance to amikacin. Here we report that silver acetate is a potent inhibitor of AAC(2')-Ia-mediated acetylation of plazomicin in vitro, and it reduces resistance levels of Escherichia coli carrying aac(2')-Ia. The resistance reversion assays produced equivalent results when the structural gene was expressed under the control of the natural or the blaTEM-1 promoters. The antibiotic effect of plazomicin in combination with silver was bactericidal, and the mix did not show significant toxicity to human embryonic kidney 293 (HEK293) cells.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Marcelo E. Tolmasky
- Center for Applied Biotechnology Studies, Department of Biological Science, California State University Fullerton, Fullerton, CA 92831, USA
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4
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Wang M, Wang L, Shabbir S, Zhou D, Shahid MA, Luo H, Li H, Li Z, Sun X, Wu C, Zhao Y. Effects of thiram exposure on liver metabolism of chickens. Front Vet Sci 2023; 10:1139815. [PMID: 36925611 PMCID: PMC10011634 DOI: 10.3389/fvets.2023.1139815] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/06/2023] [Indexed: 03/08/2023] Open
Abstract
Pesticides are widely used to control crop diseases, which have made an important contribution to the increase of global crop production. However, a considerable part of pesticides may remain in plants, posing a huge threat to animal safety. Thiram is a common pesticide and has been proven that its residues in the feed can affect the growth performance, bone formation, and intestinal health of chickens. However, there are few studies on the liver metabolism of chickens exposed to thiram. Here, the present study was conducted to investigate the effect of thiram exposure on liver metabolism of chickens. Metabolomics analysis shows that 62 metabolites were down-regulated (ginsenoside F5, arbekacin, coproporphyrinogen III, 3-keto Fusidic acid, marmesin, isofumonisin B1, 3-Hydroxyquinine, melleolide B, naphazoline, marmesin, dibenzyl ether, etc.) and 35 metabolites were up-regulated (tetrabromodiphenyl ethers, deoxycholic acid glycine conjugate, L-Palmitoylcarnitine, austalide K, hericene B, pentadecanoylcarnitine, glyceryl palmitostearate, quinestrol, 7-Ketocholesterol, tetrabromodiphenyl ethers, etc.) in thiram-induced chickens, mainly involved in the metabolic pathways including glycosylphosphatidylinositol (GPI)-anchor biosynthesis, porphyrin and chlorophyll metabolism, glycerophospholipid metabolism, primary bile acid biosynthesis and steroid hormone biosynthesis. Taken together, this research showed that thiram exposure significantly altered hepatic metabolism in chickens. Moreover, this study also provided a basis for regulating the use and disposal of thiram to ensure environmental quality and poultry health.
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Affiliation(s)
- Meng Wang
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Lei Wang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | | | - Dongliang Zhou
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Muhammad Akbar Shahid
- Department of Pathobiology, Faculty of Veterinary Sciences, Bahauddin Zakariya University, Multan, Pakistan
| | - Houqiang Luo
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Huixia Li
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Ziwei Li
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Xingya Sun
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Chunqin Wu
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
| | - Yan Zhao
- College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou, China
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5
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Advances in biosensor development for the determination of antibiotics in cow's milk - A review. TALANTA OPEN 2022. [DOI: 10.1016/j.talo.2022.100145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Wei B, Zhu W, Li K, Liu Q, Zhang J, Kou H, Xu C, He L, Wang H. Natural collagen peptides-encapsulated gold nanoclusters for the simultaneous detection of multiple antibiotics in milk and molecular logic operations. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Nie Q, Deng J, Xie B, Shi G, Zhou T. A dual-channel colorimetric and fluorescent sensor for the rapid and ultrasensitive detection of kanamycin based on gold nanoparticles-copper nanoclusters. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:5813-5820. [PMID: 34852031 DOI: 10.1039/d1ay01460a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this work, a dual-channel assay was constructed for the colorimetric and fluorescent detection of kanamycin (KAN) based on gold nanoparticles (Au NPs) and copper nanoclusters (Cu NCs). Initially, the fluorescence of Cu NCs was quenched by 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT)-functionalized Au NPs due to the inner filter effect (IFE). The existence of KAN acted as a molecular bridge to interact with AHMT via hydrogen bonds and induced the aggregation of AHMT-Au NPs, leading to a change in the color of the gold colloidal solution from reddish-violet to blue within 2 min. Moreover, the aggregated AHMT-Au NPs can weaken its IFE toward Cu NCs and result in fluorescence restoration. With the sensor employed here, the concentration of KAN can be quantitatively analyzed through double channels, and a low LOD (limit of detection) of 1.9 nM and 1.2 nM was realized by the colorimetric and fluorescent method, respectively. Benefitting from the short response time, high sensitivity, and good reliability, the established assay offered great opportunities for the on-site monitoring of antibiotics in environmental samples.
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Affiliation(s)
- Qi Nie
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Process and Eco-Restoration, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
- Institute of Eco-Chongming (IEC), 3663 North Zhongshan Road, Shanghai 20062, China
| | - Jingjing Deng
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Process and Eco-Restoration, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
- Institute of Eco-Chongming (IEC), 3663 North Zhongshan Road, Shanghai 20062, China
| | - Bing Xie
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Process and Eco-Restoration, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
| | - Guoyue Shi
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Tianshu Zhou
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Process and Eco-Restoration, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
- Institute of Eco-Chongming (IEC), 3663 North Zhongshan Road, Shanghai 20062, China
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8
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Hotta K. Basic and applied research on multiple aminoglycoside antibiotic resistance of actinomycetes: an old-timer's recollection. J Ind Microbiol Biotechnol 2021; 48:6353527. [PMID: 34402899 PMCID: PMC8788812 DOI: 10.1093/jimb/kuab059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 08/03/2021] [Indexed: 11/14/2022]
Abstract
A list of our research achievements on multiple aminoglycoside antibiotic (AG) resistance in AG-producing actinomycetes is outlined. In 1979, the author discovered a novel AG (istamycin)-producing Streptomyces tenjimariensis SS-939 by screening actinomycetes with kanamycin (KM)-resistance and plasmid profiles. This discovery directed our biochemical and genetic approaches to multiple AG resistance (AGR) of AG producers. In this article, the following discoveries will be outlined: (1) AGR profiles correlating with the productivity of AGs in AG-producers, (2) Wide distribution of multiple AG resistance in AG-nonproducing actinomycetes, (3) Involvement of ribosomal resistance and AG-acetylating enzymes as underlying AGR factors, (4) Activation by single nucleotide substitution of a silent gene coding for aminoglycoside 3-N-acetyltransferase, AAC(3), in S. griseus, (5) Discovery of a novel antibiotic indolizomycin through protoplast fusion treatment between S. tenjimariensis and S. griseus strains with different AGR phenotypes, and (6) Double stage-acting activity of arbekacin (ABK; an anti-MRSA semisynthetic AG) discovered by acetylation of ABK with cloned AACs; that is both ABK and its acetylated derivatives showed remarkable antibiotic activities.
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Affiliation(s)
- Kunimoto Hotta
- Functional Water Foundation, 2-20-8 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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9
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Parajuli NP, Mandava CS, Pavlov MY, Sanyal S. Mechanistic insights into translation inhibition by aminoglycoside antibiotic arbekacin. Nucleic Acids Res 2021; 49:6880-6892. [PMID: 34125898 PMCID: PMC8266624 DOI: 10.1093/nar/gkab495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/17/2021] [Accepted: 05/26/2021] [Indexed: 11/13/2022] Open
Abstract
How aminoglycoside antibiotics limit bacterial growth and viability is not clearly understood. Here we employ fast kinetics to reveal the molecular mechanism of action of a clinically used, new-generation, semisynthetic aminoglycoside Arbekacin (ABK), which is designed to avoid enzyme-mediated deactivation common to other aminoglycosides. Our results portray complete picture of ABK inhibition of bacterial translation with precise quantitative characterizations. We find that ABK inhibits different steps of translation in nanomolar to micromolar concentrations by imparting pleotropic effects. ABK binding stalls elongating ribosomes to a state, which is unfavorable for EF-G binding. This prolongs individual translocation step from ∼50 ms to at least 2 s; the mean time of translocation increases inversely with EF-G concentration. ABK also inhibits translation termination by obstructing RF1/RF2 binding to the ribosome. Furthermore, ABK decreases accuracy of mRNA decoding (UUC vs. CUC) by ∼80 000 fold, causing aberrant protein production. Importantly, translocation and termination events cannot be completely stopped even with high ABK concentration. Extrapolating our kinetic model of ABK action, we postulate that aminoglycosides impose bacteriostatic effect mainly by inhibiting translocation, while they become bactericidal in combination with decoding errors.
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Affiliation(s)
- Narayan Prasad Parajuli
- Department of Cell and Molecular Biology, Biomedical Center, Uppsala University, SE-75124 Uppsala, Sweden
| | - Chandra Sekhar Mandava
- Department of Cell and Molecular Biology, Biomedical Center, Uppsala University, SE-75124 Uppsala, Sweden
| | - Michael Y Pavlov
- Department of Cell and Molecular Biology, Biomedical Center, Uppsala University, SE-75124 Uppsala, Sweden
| | - Suparna Sanyal
- Department of Cell and Molecular Biology, Biomedical Center, Uppsala University, SE-75124 Uppsala, Sweden
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10
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Zhou S, Chen X, Ni X, Liu Y, Zhang H, Dong M, Xia H. Pyridoxal-5'-phosphate-dependent enzyme GenB3 Catalyzes C-3',4'-dideoxygenation in gentamicin biosynthesis. Microb Cell Fact 2021; 20:65. [PMID: 33750386 PMCID: PMC7941887 DOI: 10.1186/s12934-021-01558-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/03/2021] [Indexed: 11/20/2022] Open
Abstract
Background The C-3′,4′-dideoxygenation structure in gentamicin can prevent deactivation by aminoglycoside 3′-phosphotransferase (APH(3′)) in drug-resistant pathogens. However, the enzyme catalyzing the dideoxygenation step in the gentamicin biosynthesis pathway remains unknown. Results Here, we report that GenP catalyzes 3′ phosphorylation of the gentamicin biosynthesis intermediates JI-20A, JI-20Ba, and JI-20B. We further demonstrate that the pyridoxal-5′-phosphate (PLP)-dependent enzyme GenB3 uses these phosphorylated substrates to form 3′,4′-dideoxy-4′,5′-ene-6′-oxo products. The following C-6′-transamination and the GenB4-catalyzed reduction of 4′,5′-olefin lead to the formation of gentamicin C. To the best of our knowledge, GenB3 is the first PLP-dependent enzyme catalyzing dideoxygenation in aminoglycoside biosynthesis. Conclusions This discovery solves a long-standing puzzle in gentamicin biosynthesis and enriches our knowledge of the chemistry of PLP-dependent enzymes. Interestingly, these results demonstrate that to evade APH(3′) deactivation by pathogens, the gentamicin producers evolved a smart strategy, which utilized their own APH(3′) to activate hydroxyls as leaving groups for the 3′,4′-dideoxygenation in gentamicin biosynthesis. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01558-7.
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Affiliation(s)
- Shaotong Zhou
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China
| | - Xiaotang Chen
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China
| | - Xianpu Ni
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China.
| | - Yu Liu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China
| | - Hui Zhang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China
| | - Min Dong
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
| | - Huanzhang Xia
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Benxi, 117004, China.
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11
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Pietschmann J, Dittmann D, Spiegel H, Krause HJ, Schröper F. A Novel Method for Antibiotic Detection in Milk Based on Competitive Magnetic Immunodetection. Foods 2020; 9:foods9121773. [PMID: 33265942 PMCID: PMC7760479 DOI: 10.3390/foods9121773] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 11/16/2022] Open
Abstract
The misuse of antibiotics as well as incorrect dosage or insufficient time for detoxification can result in the presence of pharmacologically active molecules in fresh milk. Hence, in many countries, commercially available milk has to be tested with immunological, chromatographic or microbiological analytical methods to avoid consumption of antibiotic residues. Here a novel, sensitive and portable assay setup for the detection and quantification of penicillin and kanamycin in whole fat milk (WFM) based on competitive magnetic immunodetection (cMID) is described and assay accuracy determined. For this, penicillin G and kanamycin-conjugates were generated and coated onto a matrix of immunofiltration columns (IFC). Biotinylated penicillin G or kanamycin-specific antibodies were pre-incubated with antibiotics-containing samples and subsequently applied onto IFC to determine the concentration of antibiotics through the competition of antibody-binding to the antibiotic-conjugate molecules. Bound antibodies were labeled with streptavidin-coated magnetic particles and quantified using frequency magnetic mixing technology. Based on calibration measurements in WFM with detection limits of 1.33 ng·mL-1 for penicillin G and 1.0 ng·mL-1 for kanamycin, spiked WFM samples were analyzed, revealing highly accurate recovery rates and assay precision. Our results demonstrate the suitability of cMID-based competition assay for reliable and easy on-site testing of milk.
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Affiliation(s)
- Jan Pietschmann
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraße 6, 52074 Aachen, Germany; (D.D.); (H.S.); (F.S.)
- Correspondence:
| | - Dominik Dittmann
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraße 6, 52074 Aachen, Germany; (D.D.); (H.S.); (F.S.)
| | - Holger Spiegel
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraße 6, 52074 Aachen, Germany; (D.D.); (H.S.); (F.S.)
| | - Hans-Joachim Krause
- Institute of Biological Information Processing, Bioelectronics IBI-3, Forschungszentrum Jülich, 52428 Jülich, Germany; h.-
| | - Florian Schröper
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraße 6, 52074 Aachen, Germany; (D.D.); (H.S.); (F.S.)
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12
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Wu HY, Wang WY, Feng CC, Hou DR. Asymmetric Synthesis of Nabscessin A from Inositol and d-Camphor. J Org Chem 2020; 85:13153-13159. [PMID: 32938189 DOI: 10.1021/acs.joc.0c01839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An enantiomer of nabscessin A (1), an aminocyclitol amide with antimicrobial activity, was synthesized from myo-inositol and dimethyl d-camphor acetal in 14 steps. Formal synthesis of natural nabscessin A was also achieved through the new approach to access both enantiomers of 4,5-di-O-benzyl-myo-inositol, derived from the same set of starting materials. This synthesis features utilizations of the existing framework of myo-inositol and a regioselective esterification.
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Affiliation(s)
- Hsin-Ying Wu
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001 Taiwan
| | - Wei-Yi Wang
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001 Taiwan
| | - Chia-Chi Feng
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001 Taiwan
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001 Taiwan
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13
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Escolà-Vergé L, Los-Arcos I, Almirante B. New antibiotics for the treatment of infections by multidrug-resistant microorganisms. Med Clin (Barc) 2020; 154:351-357. [PMID: 31926653 DOI: 10.1016/j.medcli.2019.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/14/2019] [Accepted: 11/23/2019] [Indexed: 12/13/2022]
Abstract
One of the current priorities of the World Health Organization is multidrug-resistant bacteria, because they are a global problem due to their rapid spread and the difficulty of their treatment. In addition, they are associated with high morbidity, mortality and high economic costs. There are multidrug-resistant bacteria, both Gram-positive and Gram-negative, including Pseudomonas aeruginosa and Acinetobacter baumannii resistant to carbapenems, enterobacteria producing carbapenemases, Staphylococcus aureus resistant to methicillin and/or with intermediate sensitivity to vancomycin, and Enterococcus faecium (and less frequently Enterococcus faecalis) resistant to vancomycin. This review will comment on the new antibiotics that have been incorporated into the therapeutic arsenal in recent years, as well as other promising antibiotics that are in their final stages of development.
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Affiliation(s)
- Laura Escolà-Vergé
- Servicio de Enfermedades Infecciosas, Hospital Universitario Vall d'Hebron, Departamento de Medicina, Universidad Autónoma de Barcelona, Barcelona, España; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España
| | - Ibai Los-Arcos
- Servicio de Enfermedades Infecciosas, Hospital Universitario Vall d'Hebron, Departamento de Medicina, Universidad Autónoma de Barcelona, Barcelona, España; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España.
| | - Benito Almirante
- Servicio de Enfermedades Infecciosas, Hospital Universitario Vall d'Hebron, Departamento de Medicina, Universidad Autónoma de Barcelona, Barcelona, España; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España
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14
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Zárate SG, Bastida A, Santana AG, Revuelta J. Synthesis of Ring II/III Fragment of Kanamycin: A New Minimum Structural Motif for Aminoglycoside Recognition. Antibiotics (Basel) 2019; 8:antibiotics8030109. [PMID: 31382490 PMCID: PMC6783941 DOI: 10.3390/antibiotics8030109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/25/2019] [Accepted: 07/31/2019] [Indexed: 11/30/2022] Open
Abstract
A novel protocol has been established to prepare the kanamycin ring II/III fragment, which has been validated as a minimum structural motif for the development of new aminoglycosides on the basis of its bactericidal activity even against resistant strains. Furthermore, its ability to act as a AAC-(6′) and APH-(3′) binder, and as a poor substrate for the ravenous ANT-(4′), makes it an excellent candidate for the design of inhibitors of these aminoglycoside modifying enzymes.
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Affiliation(s)
- Sandra G Zárate
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
- Facultad de Tecnología, Carrera de Ingeniería Química, Universidad Mayor, Real y Pontificia de San Francisco Xavier de Chuquisaca, Regimiento Campos 180, Casilla 60-B Sucre, Bolivia
| | - Agatha Bastida
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Andrés G Santana
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Julia Revuelta
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
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15
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Gould IM, Gunasekera C, Khan A. Antibacterials in the pipeline and perspectives for the near future. Curr Opin Pharmacol 2019; 48:69-75. [PMID: 31200170 DOI: 10.1016/j.coph.2019.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/17/2019] [Accepted: 05/04/2019] [Indexed: 12/26/2022]
Abstract
Antimicrobial resistance is a global threat to the management of infections in our patients. Sound stewardship of antibacterial agents at our disposal must be accompanied by a concerted effort to develop new agents to bolster our armamentarium. This review will cover the latest antibiotics that have come through the pipeline and the role they can play in the management of infections that are increasingly difficult to treat due to resistance mechanisms.
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Affiliation(s)
- Ian M Gould
- Aberdeen Royal Infirmary, Foresterhill, Aberdeen, AB25 2ZN, United Kingdom; University of Aberdeen, Aberdeen, United Kingdom
| | - Chathuri Gunasekera
- Aberdeen Royal Infirmary, Foresterhill, Aberdeen, AB25 2ZN, United Kingdom; University of Colombo, Colombo, Sri Lanka.
| | - Ali Khan
- Aberdeen Royal Infirmary, Foresterhill, Aberdeen, AB25 2ZN, United Kingdom
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16
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Lin X, Su J, Lin H, Sun X, Liu B, Kankala RK, Zhou SF. Luminescent carbon nanodots based aptasensors for rapid detection of kanamycin residue. Talanta 2019; 202:452-459. [PMID: 31171207 DOI: 10.1016/j.talanta.2019.04.075] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/28/2019] [Accepted: 04/28/2019] [Indexed: 02/08/2023]
Abstract
Despite the success in long-term storage of food and dietary products using antibiotics as supplements, enormous levels of their residues have remained as a significant health concern, leading to severe toxicity issues on consumption. Herein, we report an ultrasensitive and highly selective aptasensor based on carbon nanoparticles (CNPs) through a fluorescence-based aptamer-linked immunosorbent assay (FALIA) for rapid detection of kanamycin (KAA) residue. The fabricated CNP-aptasensor exhibited superior selectivity with exceptional photoluminescence properties. Under the optimal conditions, the linear equation of standard KAA solution was Y = -0.2279LogX+1.3648 (R = -0.9893) ranged from 10-4 to 10-7 ppb with excellent relative standard deviations (RSD) between 3.12 and 5.59 % (n = 3). Moreover, the limit of detection (LOD) was lower than 5.0 × 10-8 ppb. Together, the excellent recovery and significant efficacy in the rapid detection of antibiotics at a low level in milk indicate that this fabricated CNP-aptasensor has a great potential in the establishment of an efficient antibiotic detector system in food and other nutraceutical industries.
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Affiliation(s)
- Xuexia Lin
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China.
| | - Jianlong Su
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Honggui Lin
- School of Marine Engineering, Jimei University, Xiamen, 361021, China.
| | - Xiangying Sun
- College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Bin Liu
- College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Ranjith Kumar Kankala
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Shu-Feng Zhou
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
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17
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Nyinoh IW. Spontaneous mutations conferring antibiotic resistance to antitubercular drugs at a range of concentrations in Mycobacterium smegmatis. Drug Dev Res 2018; 80:147-154. [PMID: 30511362 DOI: 10.1002/ddr.21497] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 11/06/2022]
Abstract
Mycobacteria populations can undergo mutations in their DNA sequence during replication, which if not repaired would be transferred to future generations. Earlier studies have tackled the estimation of mutation rate in mycobacteria at fixed concentrations. However, in this study, in vitro spontaneous mutations in Mycobacterium smegmatis (Msm) mc2 155 (Msm) that confers resistance to some of the most important antitubercular drugs; isoniazid (INHr ), rifampicin (RIFr ), kanamycin (KANr ) and streptomycin (STRr ) were first determined at several highly lethal concentrations, a few of which have not been previously investigated, in a fluctuation assay. Thereafter, mutation rate was estimated using the most commonly adopted Po method, and estimates were then compared concurrently with the Lea-Coulson method of the median and Ma-Sandri-Sarkar Maximum Likelihood Estimator method available on the Fluctuation AnaLysis CalculatOR (FALCOR). The mutation rates of RIFr ranged from 9.24 × 10-8 to 2.18 × 10-10 , INHr 1.2 × 10-7 -1.20 × 10-9 , STRr 2.77 × 10-8 -5.31 × 10-8 and KANr 1.7 × 10-8 mutations per cell division. Data obtained in this study provide mutation rate estimates to key antitubercular drugs at a range of concentrations while also validating a number of the frequent approaches for estimating mutation rates.
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Affiliation(s)
- Iveren Winifred Nyinoh
- Department of Biological Sciences, Benue State University, Makurdi, Benue State, Nigeria
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18
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Plasticity of Aminoglycoside Binding to Antibiotic Kinase APH(2″)-Ia. Antimicrob Agents Chemother 2018; 62:AAC.00202-18. [PMID: 29661878 DOI: 10.1128/aac.00202-18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Abstract
The APH(2″)-Ia aminoglycoside resistance enzyme forms the C-terminal domain of the bifunctional AAC(6')-Ie/APH(2″)-Ia enzyme and confers high-level resistance to natural 4,6-disubstituted aminoglycosides. In addition, reports have suggested that the enzyme can phosphorylate 4,5-disubstituted compounds and aminoglycosides with substitutions at the N1 position. Previously determined structures of the enzyme with bound aminoglycosides have not indicated how these noncanonical substrates may bind and be modified by the enzyme. We carried out crystallographic studies to directly observe the interactions of these compounds with the aminoglycoside binding site and to probe the means by which these noncanonical substrates interact with the enzyme. We find that APH(2″)-Ia maintains a preferred mode of binding aminoglycosides by using the conserved neamine rings when possible, with flexibility that allows it to accommodate additional rings. However, if this binding mode is made impossible because of additional substitutions to the standard 4,5- or 4,6-disubstituted aminoglycoside architecture, as in lividomycin A or the N1-substituted aminoglycosides, it is still possible for these aminoglycosides to bind to the antibiotic binding site by using alternate binding modes, which explains the low rates of noncanonical phosphorylation activities seen in enzyme assays. Furthermore, structural studies of a clinically observed arbekacin-resistant mutant of APH(2″)-Ia revealed an altered aminoglycoside binding site that can stabilize an alternative binding mode for N1-substituted aminoglycosides. This mutation may alter and expand the aminoglycoside resistance spectrum of the wild-type enzyme in response to newly developed aminoglycosides.
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