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Lin N, Wang M, Gong H, Li N, Liu F, Wu Y, Sun X, Yang Q, Tan X. Immobilizing DNase in ternary AuAgCu hydrogels to accelerate biofilm disruption for synergistically enhanced therapy of MRSA infections. Int J Biol Macromol 2024; 277:134518. [PMID: 39111496 DOI: 10.1016/j.ijbiomac.2024.134518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 07/25/2024] [Accepted: 08/03/2024] [Indexed: 08/10/2024]
Abstract
Bacterial biofilm-related infections have become a significant global concern in public health and economy. Extracellular DNA (eDNA) is regarded as one of the key elements of extracellular polymeric substances (EPS) in bacterial biofilm, providing robust support to maintain the stability of bacterial biofilms for fighting against environmental stresses (such as antibiotics, reactive oxygen species (ROS), and hyperthermia). In this study, ternary AuAgCu hydrogels nanozyme with porous network structures were utilized for the immobilization of DNase (AuAgCu@DNase hydrogels) to realize enhanced biofilm decomposition and antibacterial therapy of MRSA. The prepared AuAgCu@DNase hydrogels can efficiently hydrolyze eDNA in biofilms so that the generated ROS and hyperthermia by laser irradiation can permeate into the interior of the biofilm to achieve deep sterilization. The typical interface interactions between AuAgCu hydrogels and DNase and the excellent photothermal-boost peroxidase-like performances of AuAgCu hydrogels take responsibility for the enhanced antibacterial activity. In the MRSA-infected wounds model, the in vivo antibacterial results revealed that the AuAgCu@DNase hydrogels possess excellent drug-resistant bacteria-killing performance with superb biocompatibility. Meanwhile, the pathological analysis of collagen deposition and fibroblast proliferation of wounds demonstrate highly satisfactory wound healing. This work offers an innovative path for developing nanozyme-enzyme antibacterial composites against drug-resistant bacteria and their biofilms.
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Affiliation(s)
- Nanyun Lin
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China; NHC Key Laboratory of Birth Defect Research and Prevention, MOE Key Lab of Rare Pediatric Disease & Institute of Cytology and Genetics, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Minghui Wang
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Hongyu Gong
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Na Li
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Fen Liu
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Yingying Wu
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Ximei Sun
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Qinglai Yang
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China; NHC Key Laboratory of Birth Defect Research and Prevention, MOE Key Lab of Rare Pediatric Disease & Institute of Cytology and Genetics, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.
| | - Xiaofeng Tan
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital & Center for Molecular Imaging Probe & Hunan Engineering Research Center for Early Diagnosis and Treatment of Liver Cancer, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China; NHC Key Laboratory of Birth Defect Research and Prevention, MOE Key Lab of Rare Pediatric Disease & Institute of Cytology and Genetics, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.
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Chen P, Qin J, Su HK, Du L, Zeng Q. Harmine acts as a quorum sensing inhibitor decreasing the virulence and antibiotic resistance of Pseudomonas aeruginosa. BMC Infect Dis 2024; 24:760. [PMID: 39085766 PMCID: PMC11293143 DOI: 10.1186/s12879-024-09639-9] [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: 04/22/2024] [Accepted: 07/22/2024] [Indexed: 08/02/2024] Open
Abstract
BACKGROUND As antimicrobial resistance (AMR) has become a global health crisis, new strategies against AMR infection are urgently needed. Quorum sensing (QS), responsible for bacterial communication and pathogenicity, is among the targets for anti-virulence drugs that thrive as one of the promising treatments against AMR infection. METHODS We identified a natural compound, Harmine, through virtual screening based on three QS receptors of Pseudomonas aeruginosa (P. aeruginosa) and explored the effect of Harmine on QS-controlled and pathogenicity-related phenotypes including pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14. The protective effect of Harmine on Caenorhabditis elegans (C. elegans) and mice infection models was determined and the synergistic effect of Harmine combined with common antibiotics was explored. The underlaying mechanism of Harmine's QS inhibitory effect was illustrated by molecular docking analysis, transcriptomic analysis, and target verification assay. RESULTS In vitro results suggested that Harmine possessed QS inhibitory effects on pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14, and in vivo results displayed Harmine's protective effect on C. elegans and mice infection models. Intriguingly, Harmine increased susceptibility of both PA14 and clinical isolates of P. aeruginosa to polymyxin B and kanamycin when used in combination. Moreover, Harmine down-regulated a series of QS controlled genes associated with pathogenicity and the underlying mechanism may have involved competitively antagonizing autoinducers' receptors LasR, RhlR, and PqsR. CONCLUSIONS This study shed light on the anti-virulence potential of Harmine against QS targets, suggesting the possible use of Harmine and its derivates as anti-virulence compounds.
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Affiliation(s)
- Pei Chen
- Department of Respiratory and Critical Care Medicine, Affiliated Hospital/Clinical College of Chengdu University, No. 82, North Section 2, 2nd Ring Road, Chengdu, 610081, China
| | - Jiangyue Qin
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, 610081, China
| | - Helene K Su
- Seven Lakes High School, Katy, TX, 77494, USA
| | - Lianming Du
- Institute for Advanced Study, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, 610106, China.
| | - Qianglin Zeng
- Department of Respiratory and Critical Care Medicine, Affiliated Hospital/Clinical College of Chengdu University, No. 82, North Section 2, 2nd Ring Road, Chengdu, 610081, China.
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Abdula AM, Mohsen GL, Jasim BH, Jabir MS, Rushdi AI, Baqi Y. Synthesis, pharmacological evaluation, and in silico study of new 3-furan-1-thiophene-based chalcones as antibacterial and anticancer agents. Heliyon 2024; 10:e32257. [PMID: 38947436 PMCID: PMC11214363 DOI: 10.1016/j.heliyon.2024.e32257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/30/2024] [Accepted: 05/30/2024] [Indexed: 07/02/2024] Open
Abstract
New 3-furan-1-thiophene-based chalcones were synthesized, characterized and pharmacologically evaluated as antibacterial and anticancer agents against two bacterial species; Gram-positive (Streptococcus pyogenes) and Gram-negative (Pseudomonas aeruginosa). All tested final compounds were active against the two bacterial species; S. pyogenes and P . aeruginosa. Especially compound AM4 showed large inhibition zone (27.13 and 23.30 mm), respectively. Using the DPPH assay, the new chalcones were evaluated for their free radical scavenging activity and found to reach up to 90 %, accomplished at a test concentration of 200 μg/mL. Furthermore, the chalcone derivatives were investigated against two breast cell lines; MCF-7 (cancerous) and MCF-10A (non-cancerous). Compound AM4 showed potent anticancer activity (IC50 = 19.354 μg/mL) in comparison to the other tested chalcone derivatives. In silico study was achieved using the PyRx AutoDock Vina software (0.8) to study the interaction types between the new hits and the binding sites of targeted proteins; glucosamine-6-phosphate synthase and tubulin, the target for antibacterial and anticancer drugs, respectively. Based on the molecular docking results the tested chalcones bind to the active pocket of the respective proteins, which support the in vitro results. In conclusion, 3-furan-1-thiophene-based chalcones could serve as new hits in the discovery of novel anticancer and/or antibacterial drugs.
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Affiliation(s)
- Ahmed Mutanabbi Abdula
- Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, P.O. Box 14022, Iraq
| | - Ghosoun Lafta Mohsen
- Department of Chemistry, College of Science, Nahrain University, Baghdad, P.O. Box 64074, Iraq
| | - Bilal H. Jasim
- Department of Applied Sciences, University of Technology, Baghdad, P.O. Box 19006, Iraq
| | - Majid S. Jabir
- Department of Applied Sciences, University of Technology, Baghdad, P.O. Box 19006, Iraq
| | - Abduljabbar I.R. Rushdi
- Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, P.O. Box 14022, Iraq
| | - Younis Baqi
- Department of Chemistry, College of Science, Sultan Qaboos University, Muscat, P.O. Box 36, Oman
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