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Hu P, Chen H, Zhao D, Ma Z, Zeng W, Han Y, Zhou T, Cao J, Shen M. Azomycin Orchestrate Colistin-Resistant Enterobacter cloacae Complex's Colistin Resistance Reversal In Vitro and In Vivo. ACS Infect Dis 2024; 10:662-675. [PMID: 38294410 DOI: 10.1021/acsinfecdis.3c00526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The Enterobacter cloacae complex (ECC) is a group of nosocomial pathogens that pose a challenge in clinical treatment due to its intrinsic resistance and the ability to rapidly acquire resistance. Colistin was reconsidered as a last-resort antibiotic for combating multidrug-resistant ECC. However, the persistent emergence of colistin-resistant (COL-R) pathogens impedes its clinical efficacy, and novel treatment options are urgently needed. We propose that azomycin, in combination with colistin, restores the susceptibility of COL-R ECC to colistin in vivo and in vitro. Results from the checkerboard susceptibility, time-killing, and live/dead bacterial cell viability tests showed strong synergistic antibacterial activity in vitro. Animal infection models suggested that azomycin-colistin enhanced the survival rate of infected Galleria mellonella and reduced the bacterial load in the thighs of infected mice, highlighting its superior in vivo synergistic antibacterial activity. Crystal violet staining and scanning electron microscopy unveiled the in vitro synergistic antibiofilm effects of azomycin-colistin. The safety of azomycin and azomycin-colistin at experimental concentrations was confirmed through cytotoxicity tests and an erythrocyte hemolysis test. Azomycin-colistin stimulated the production of reactive oxygen species in COL-R ECC and inhibited the PhoPQ two-component system to combat bacterial growth. Thus, azomycin is feasible as a colistin adjuvant against COL-R ECC infection.
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Affiliation(s)
- Panjie Hu
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Huanchang Chen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Deyi Zhao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Zhexiao Ma
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Weiliang Zeng
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Yijia Han
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Tieli Zhou
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Jianming Cao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Mo Shen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
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Raju S, Sheridan PE, Hauer AK, Garrett AE, McConnell DE, Thornton JA, Stokes SL, Emerson J. Cu-Catalyzed Chan-Evans-Lam Coupling reactions of 2-Nitroimidazole with Aryl boronic acids: An effort toward new bioactive agents against S. pneumoniae. Chem Biodivers 2022; 19:e202200327. [PMID: 35819995 PMCID: PMC10184775 DOI: 10.1002/cbdv.202200327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/12/2022] [Indexed: 11/09/2022]
Abstract
The coupling of phenylboronic acids with poorly-activated imidazoles is studied as a model system to explore the use of copper-catalyzed Chan-Evans-Lam (CEL) coupling for targeted C-N bond forming reactions. Optimized CEL reaction conditions are reported for four phenanthroline-based ligand systems, where the ligand 4,5-diazafluoren-9-one (dafo, L2 ) with 1 molar equivalent of potassium carbonate yielded the highest reactivity. The substrate 2-Nitroimidazole (also known as azomycin) has documented antimicrobial activity against a range of microbes. Here N-arylation of 2-nitroimidazole with a range of aryl boronic acids has been successfully developed by copper(II)-catalyzed CEL reactions. Azomycin and a range of newly arylated azomycin derivatives were screened against S. pneumoniae , where 1-(4-(benzyloxy)phenyl)-2-nitro-1H-imidazole ( 3d ) was demonstrated to have a minimal inhibition concentration value of 3.3 μg/mL.
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Affiliation(s)
- Selvam Raju
- Mississippi State University, Chemistry, Department of Chemistry, 1115 Hand Laboratory, 39762, Mississippi State, UNITED STATES
| | - Patrick E Sheridan
- Mississippi State University, Chemistry, Department of Chemistry, 1115 Hand Lab, 39762, Mississippi State, UNITED STATES
| | - Alanna K Hauer
- Mississippi State University, Chemistry, Department of Chemistry, 1115 Hand Lab, 39762, Mississippi State, UNITED STATES
| | - Allyn E Garrett
- Mississippi State University, Chemistry, Department of Chemistry, 1115 Hand Lab, 39762, Mississippi State, UNITED STATES
| | - Danielle E McConnell
- Mississippi State University, Biological Sciences, Harned Hall, 39762, Mississippi State, UNITED STATES
| | - Justin A Thornton
- Mississippi State University, Biological Sciences, Harned Hall, 39762, Mississippi State, UNITED STATES
| | - Sean L Stokes
- Mississippi State University, Chemistry, 1115 Hand Lab, 39762, Mississippi State, UNITED STATES
| | - Joseph Emerson
- Mississippi State University, Chemistry, 1115 Hand Laboratory, 310 President's circle, 39762, Mississippi State, UNITED STATES
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Abinaya M, Rajakumaran R, Chen SM, Karthik R, Muthuraj V. In Situ Synthesis, Characterization, and Catalytic Performance of Polypyrrole Polymer-Incorporated Ag 2MoO 4 Nanocomposite for Detection and Degradation of Environmental Pollutants and Pharmaceutical Drugs. ACS Appl Mater Interfaces 2019; 11:38321-38335. [PMID: 31549800 DOI: 10.1021/acsami.9b13682] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Material combinations of semiconductor with conducting polymer are gaining growing interest due to their enhanced activities in photocatalysis as well as electrochemical sensing. In this present work, we report a facile in situ synthesis of polypyrrole (PPy) polymer-incorporated silver molybdate (Ag2MoO4) nanocomposite that is utilized as a photocatalyst and electrocatalyst for the degradation of pollutant heavy metals, namely, methylene blue (MB) and heavy metal (Cr(VI)), and ciprofloxacin (CIP) and for detection of the drug, azomycin. The synthesized nanocomposite was characterized by various theoretical, spectral, and microscopic studies. Matching of the powder X-ray diffraction pattern with JCPDS no. 76-1747 confirmed the formation of α-Ag2MoO4/PPy. The surface topography and spherical morphology of the nanocomposite were studied using field emission-scanning electron microscopy and transmission electron microscopy. Fourier transform infrared spectral detail expounds the smooth incorporation of PPy to Ag2MoO4. The as-synthesized nanocomposite performs as an efficient photocatalyst in the degradation of MB (99.9%), Cr(VI) (99%), and CIP drug (99.8%) within 10 min. In addition to this, the Ag2MoO4/PPy-modified glassy carbon electrode (GCE) demonstrated excellent electrocatalytic activity in terms of a higher cathodic peak current and lower peak potential when compared with other modified and unmodified GCEs for the detection of azomycin. The Ag2MoO4/PPy/GCE displayed a broader linear response range and lower detection limit of 0.5-499 μM and 65 nM, respectively. Moreover, other potentially co-interfering compounds, such as a similar functional group-containing biological substances and inorganic species, have no interference effect toward azomycin sensing.
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Affiliation(s)
- Manickavasagan Abinaya
- Department of Chemistry , VHNSN College (Autonomous) , Virudhunagar 626001 , Tamil Nadu , India
| | - Ramachandran Rajakumaran
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , No. 1, Section 3, Chung-Hsiao East Road , Taipei 106 , Taiwan , ROC
| | - Shen-Ming Chen
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , No. 1, Section 3, Chung-Hsiao East Road , Taipei 106 , Taiwan , ROC
| | - Raj Karthik
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , No. 1, Section 3, Chung-Hsiao East Road , Taipei 106 , Taiwan , ROC
| | - Velluchamy Muthuraj
- Department of Chemistry , VHNSN College (Autonomous) , Virudhunagar 626001 , Tamil Nadu , India
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Kumar P, Elsaidi HRH, Zorniak B, Laurens E, Yang J, Bacchu V, Wang M, Wiebe LI. Synthesis and Biological Evaluation of Iodogluco azomycin (I-GAZ), an Azomycin-Glucose Adduct with Putative Applications in Diagnostic Imaging and Radiotherapy of Hypoxic Tumors. ChemMedChem 2016; 11:1638-45. [PMID: 27377671 PMCID: PMC5095876 DOI: 10.1002/cmdc.201600213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/06/2016] [Indexed: 11/15/2022]
Abstract
Iodoglucoazomycin (I-GAZ; N-(2-iodo-3-(6-O-glucosyl)propyl)-2-nitroimidazole), a non-glycosidic nitroimidazole-6-O-glucose adduct, was synthesized, radioiodinated, and evaluated as a substrate of glucose transporter 1 (GLUT1) for radiotheranostic (therapy+diagnostic) management of hypoxic tumors. Nucleophilic iodination of the nosylate synthon of I-GAZ followed by deprotection afforded I-GAZ in 74 % overall yield. I-GAZ was radioiodinated via 'exchange' labeling using [(123/131) I]iodide (50-70 % RCY) and then purified by Sep-Pak™ (>96 % RCP). [(131) I]I-GAZ was stable in 2 % ethanolic solution in sterile water for 14 days when stored at 5 °C. In cell culture, I-GAZ was found to be nontoxic to EMT-6 cells at concentrations <0.5 mm, and weakly radiosensitizing (SER 1.1 at 10 % survival of EMT-6 cells; 1.2 at 0.1 % survival in MCF-7 cells). The hypoxic/normoxic uptake ratio of [(123) I]I-GAZ in EMT-6 cells was 1.46 at 2 h, and under normoxic conditions the uptake of [(123) I]I-GAZ by EMT-6 cells was unaltered in the presence of 5 mm glucose. The biodistribution of [(131) I]I-GAZ in EMT-6 tumor-bearing Balb/c mice demonstrated rapid clearance from blood and extensive renal and hepatic excretion. Tumor/blood and tumor/muscle ratios reached ∼3 and 8, respectively, at 4 h post-injection. Regression analysis of the first order polynomial plots of the blood and tumor radioactivity concentrations supported a perfusion-excretion model with low hypoxia-dependent binding. [(131) I]I-GAZ was found to be stable in vivo, and did not deiodinate.
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Affiliation(s)
- Piyush Kumar
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada.
| | - Hassan R H Elsaidi
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Alexandria, El Sultan Hussein St. Azarita, Alexandria, Egypt
| | - Bohdarianna Zorniak
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Evelyn Laurens
- Clinical Imaging Research Centre, 14 Medical Drive, #B1-01, Singapore, 117599, Singapore
| | - Jennifer Yang
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Veena Bacchu
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Monica Wang
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Leonard I Wiebe
- Department of Oncology, Cross Cancer Institute, University of Alberta, University Ave., Edmonton, AB, T6G 1Z2, Canada
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