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Lin S, Chen Y, Sun Y, Yu G, Liao X, Yang Q. Evaluation of multi-target iridium(iii)-based metallodrugs in combating antimicrobial resistance and infections caused by Staphylococcus aureus. RSC Adv 2024; 14:16194-16206. [PMID: 38769952 PMCID: PMC11103350 DOI: 10.1039/d4ra02152e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 04/28/2024] [Indexed: 05/22/2024] Open
Abstract
The rapid emergence and spread of multidrug-resistant bacteria pose a serious challenge to human life and health, necessitating the development of novel antibacterial agents. Herein, to address this challenge, three iridium-based antibacterial agents were prepared and their antimicrobial activity were explored. Importantly, the three complexes all showed robust potency against S. aureus with MIC values in the range of 1.9-7.9 μg mL-1. Notably, the most active complex Ir3 also exhibited relative stability in mammalian fluids and a significant antibacterial effect on clinically isolated drug-resistant bacteria. Mechanism studies further demonstrated that the complex Ir3 can kill S. aureus by disrupting the integrity of the bacterial membrane and inducing ROS production. This multi-target advantage allows Ir3 to not only effectively combat bacterial resistance but also efficiently clear the bacterial biofilm. In addition, when used together, complex Ir3 could enhance the antibacterial potency of some clinical antibiotics against S. aureus. Moreover, both G. mellonella wax worms and mouse infection model demonstrated that Ir3 has low toxicity and robust anti-infective efficacy in vivo. Overall, complex Ir3 can serve as a new antibacterial agent for combating Gram-positive bacterial infections.
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Affiliation(s)
- Shijie Lin
- Department of Pharmacy, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University) Haikou 570311 China
| | - Yushou Chen
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science&Technology Normal University Nanchang 330013 China
| | - Yajuan Sun
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science&Technology Normal University Nanchang 330013 China
| | - Guangying Yu
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science&Technology Normal University Nanchang 330013 China
| | - Xiangwen Liao
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science&Technology Normal University Nanchang 330013 China
| | - Qiang Yang
- Department of Clinical Pharmacy, Hainan Cancer Hospital Haikou 570100 China
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Mishra S, Aghi A, Kumar A. Rh(III)-Catalyzed Controlled Ortho-Amidation of Arylamides with Dioxazolones Using Weakly Coordinating Native Primary Amide as the Directing Group. J Org Chem 2024; 89:5606-5618. [PMID: 38557043 DOI: 10.1021/acs.joc.4c00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Herein, we report a controlled introduction of an amide unit at the ortho-position of an electron-deficient arylamide system without affording any cyclized products using user-friendly dioxazolone as an amidating reagent in the presence of a Rh(III)-catalyst. This is the first report where native primary amide has been utilized as a weakly coordinating group for site-selective C-N bond formation reaction. The developed protocol works under external auxiliary-free conditions with a wide substrate scope.
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Affiliation(s)
- Saksham Mishra
- Department of Chemistry, Indian Institute of Technology, Bihta, Patna 801106, Bihar, India
| | - Anjali Aghi
- Department of Chemistry, Indian Institute of Technology, Bihta, Patna 801106, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology, Bihta, Patna 801106, Bihar, India
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Chung FY, Lin YZ, Huang CR, Huang KW, Chen YF. Crosslinking kiwifruit-derived DNA with natural aromatic aldehydes generates membranolytic antibacterial nanogels. Int J Biol Macromol 2024; 255:127947. [PMID: 37951422 DOI: 10.1016/j.ijbiomac.2023.127947] [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: 06/16/2023] [Revised: 10/14/2023] [Accepted: 10/31/2023] [Indexed: 11/14/2023]
Abstract
Improper use of antibiotics has led to the global rise of drug-resistant biofilm bacteria. Thus, researchers have been increasingly interested in green materials that are highly biocompatible and have low toxicity. Here, nanogels (NGs) with imine bonds were synthesized by crosslinking kiwifruit-derived DNA's primary amine and aromatic aldehydes (cuminaldehyde, p-anisaldehyde, or vanillin) under water-in-hexane emulsion processes. Transmission electron microscope showed that the NGs had spherical geometry with an average particle size ranging from 40 to 140 nm and that the zeta potential indicated a negative charge. Additionally, the DNA-aromatic aldehyde NGs showed low cytotoxicity toward normal cell organoids and human RBCs in cell viability tests. These NGs were also tested against four pathogenic bacteria for various assays. DNA-vanillin (DNA-VA) NGs exhibited significant antibacterial effects against bacteria with very low inhibitory concentrations as seen in a minimum inhibitory concentration assay. Scanning electron microscope observation revealed that the bacteria were deformed, and immunoblotting detected intracellular groEL protein expression. In agreement with these results, DNA-aromatic aldehyde NGs successfully protected C. elegans from P. aeruginosa-induced lethality. These DNA NGs provided a multivalent 3D space for antibacterial aromatic aldehydes to tether, enhancing their interaction with the bacterial wall. These results offer a new direction for the development of novel antibiotics in the future.
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Affiliation(s)
- Fang-Yu Chung
- Master Program in Biomedicine, National Taitung University, No. 684, Section 1, Zhonghua Rd., Taitung 95092, Taiwan
| | - Yi-Zhen Lin
- Master Program in Biomedicine, National Taitung University, No. 684, Section 1, Zhonghua Rd., Taitung 95092, Taiwan
| | - Cheng-Rung Huang
- Department of Biochemistry and Molecular Biology, National Cheng Kung University, No. 1, University Rd., East Dist., Tainan 70101, Taiwan
| | - Kuan-Wen Huang
- Master Program in Biomedicine, National Taitung University, No. 684, Section 1, Zhonghua Rd., Taitung 95092, Taiwan
| | - Yu-Fon Chen
- Master Program in Biomedicine, National Taitung University, No. 684, Section 1, Zhonghua Rd., Taitung 95092, Taiwan.
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Zhao WH, Xu JH, Tangadanchu VKR, Zhou CH. Thiazolyl hydrazineylidenyl indolones as unique potential multitargeting broad-spectrum antimicrobial agents. Eur J Med Chem 2023; 256:115452. [PMID: 37167780 DOI: 10.1016/j.ejmech.2023.115452] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/22/2023] [Accepted: 05/03/2023] [Indexed: 05/13/2023]
Abstract
The emergence of pathogenic and drug-resistant microorganisms seriously threatens public safety. This work constructed a unique type of thiazolyl hydrazineylidenyl indolones (THIs) to combat global microbial multidrug-resistance. Bioactive evaluation discovered that some target THIs displayed much superior antimicrobial efficacy than clinical chloromycetin, norfloxacin, cefdinir or fluconazole against the tested strains. Eminently, butyl THI 6c displayed a broad antimicrobial spectrum with low MICs of 0.25-1 μg/mL. The highly active THI 6c not only showed low cytotoxicity and hemolysis, rapidly bactericidal ability, good antibiofilm activity and promising pharmacokinetic properties, but also could significantly impede the development of bacterial resistance. Preliminary exploration of antibacterial mechanism revealed that THI 6c could effectively penetrate the cell membrane of MRSA and embed DNA to form 6c‒DNA supramolecular complex and thus hinder DNA replication. Moreover, THI 6c could reduce cell metabolic activity, which might be attributed to the fact that THI 6c could target the pyruvate kinase of MRSA and interfere with the function of the enzyme. These results provided powerful information for further developing thiazolyl hydrazineylidenyl indolones as new broad-spectrum antimicrobial agents.
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Affiliation(s)
- Wen-Hao Zhao
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Jia-He Xu
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Vijai Kumar Reddy Tangadanchu
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China.
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Li H, Li Y, Wang Y, Liu L, Dong H, Zhang C, Satoh T. Physically crosslinked PAA/Lys-BPEA hydrogel with rapid self-healing and long-term antibacterial activities. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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ChunYan Z, RuJian Y, LiQiang W, HaiYan H, JinTao W, XiangWen L, XueMin D, YanShi X. Design, synthesis, and evaluation of aryl-thioether ruthenium polypyridine complexes: A multi-target antimicrobial agents against gram-positive bacteria. Eur J Med Chem 2022; 240:114562. [DOI: 10.1016/j.ejmech.2022.114562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/28/2022] [Accepted: 06/20/2022] [Indexed: 11/15/2022]
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Baghel AS, Kumar A. Ru(II)-catalyzed external auxiliary-free primary amide-directed inverse Sonogashira reaction on (hetero)arylamides. Chem Commun (Camb) 2022; 58:11304-11307. [PMID: 36124904 DOI: 10.1039/d2cc03929j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report ruthenium(II)-catalyzed weakly coordinating primary amide-assisted ortho-di-alkynylation of (hetero)arylamides via double C-H bond activation in the presence of bromo-alkynes as coupling partners. The attractive features of the developed strategy lie in the usage of an inexpensive ruthenium(II)-salt, external auxiliary-free directing group and simple reaction conditions, along with a broad substrate scope, high reaction yields and scale-up synthesis.
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Affiliation(s)
- Akanksha Singh Baghel
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801106, Bihar, India.
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801106, Bihar, India.
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Kustova TP, Kochetova LB, Khachatryan DS. Comparison of the Reactivities of Tyrosine–Proline-Based Dipeptides toward Acylation with Nitrophenyl Benzoates. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022040078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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