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Polyudova T, Lemkina L, Eroshenko D, Esaev A. Suppression of planktonic and biofilm of Escherichia coli by the synergistic lantibiotics-polymyxins combinations. Arch Microbiol 2024; 206:191. [PMID: 38520490 DOI: 10.1007/s00203-024-03922-8] [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: 12/28/2023] [Revised: 02/28/2024] [Accepted: 03/02/2024] [Indexed: 03/25/2024]
Abstract
Escherichia coli are generally resistant to the lantibiotic's action (nisin and warnerin), but we have shown increased sensitivity of E. coli to lantibiotics in the presence of subinhibitory concentrations of polymyxins. Synergistic lantibiotic-polymyxin combinations were found for polymyxins B and M. The killing of cells at the planktonic and biofilm levels was observed for two collection and four clinical multidrug-resistant E. coli strains after treatment with lantibiotic-polymyxin B combinations. Thus, 24-h treatment of E. coli mature biofilms with warnerin-polymyxin B or nisin-polymyxin B leads to five to tenfold decrease in the number of viable cells, depending on the strain. AFM revealed that the warnerin and polymyxin B combination caused the loss of the structural integrity of biofilm and the destruction of cells within the biofilm. It has been shown that pretreatment of cells with polymyxin B leads to an increase of Ca2+ and Mg2+ ions in the culture medium, as detected by atomic absorption spectroscopy. The subsequent exposure to warnerin caused cell death with the loss of K+ ions and cell destruction with DNA and protein release. Thus, polymyxins display synergy with lantibiotics against planktonic and biofilm cells of E. coli, and can be used to overcome the resistance of Gram-negative bacteria to lantibiotics.
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Affiliation(s)
- Tatyana Polyudova
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia.
| | - Larisa Lemkina
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia
| | - Daria Eroshenko
- Institute of Technical Chemistry, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Science, Perm, Russia
| | - Artem Esaev
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia
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Campos LA, Neto AF, Noronha MC, Santos JV, Cavalcante MK, Castro MC, Pereira VR, Cavalcanti IM, Santos-Magalhães NS. Zein nanoparticles containing ceftazidime and tobramycin: antibacterial activity against Gram-negative bacteria. Future Microbiol 2024; 19:317-334. [PMID: 38440893 DOI: 10.2217/fmb-2023-0147] [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: 06/28/2023] [Accepted: 09/25/2023] [Indexed: 03/06/2024] Open
Abstract
Aims: This work describes the encapsulation of ceftazidime and tobramycin in zein nanoparticles (ZNPs) and the characterization of their antibacterial and antibiofilm activities against Gram-negative bacteria. Materials & methods: ZNPs were synthesized by nanoprecipitation. Cytotoxicity was assessed by MTT assay and antibacterial and antibiofilm assays were performed by broth microdilution and violet crystal techniques. Results: ZNPs containing ceftazidime (CAZ-ZNPs) and tobramycin (TOB-ZNPs) showed drug encapsulation and thermal stability. Encapsulation of the drugs reduced their cytotoxicity 9-25-fold. Antibacterial activity, inhibition and eradication of biofilm by CAZ-ZNPs and TOB-ZNPs were observed. There was potentiation when CAZ-ZNPs and TOB-ZNPs were combined. Conclusion: CAZ-ZNPs and TOB-ZNPs present ideal physical characteristics for in vivo studies of antibacterial and antibiofilm activities.
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Affiliation(s)
- Luís Aa Campos
- Biochemistry Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
- Clinical Microbiology Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
| | - Azael Fs Neto
- Biochemistry Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
| | - Maria Cs Noronha
- Biochemistry Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
| | - João Vo Santos
- Clinical Microbiology Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
| | - Marton Ka Cavalcante
- Oswaldo Cruz Pernambuco Foundation, Fiocruz/PE, Immunogenetics Laboratory, Recife, CEP 50740-465, Pernambuco, Brazil
| | - Maria Cab Castro
- Oswaldo Cruz Pernambuco Foundation, Fiocruz/PE, Immunogenetics Laboratory, Recife, CEP 50740-465, Pernambuco, Brazil
- Parasitology Laboratory, Federal University of Pernambuco/Academic Center of Vitória, Vitória de Santo Antão, CEP 55608- 680, Pernambuco, Brazil
| | - Valéria Ra Pereira
- Oswaldo Cruz Pernambuco Foundation, Fiocruz/PE, Immunogenetics Laboratory, Recife, CEP 50740-465, Pernambuco, Brazil
| | - Isabella Mf Cavalcanti
- Clinical Microbiology Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
- Laboratory of Microbiology & Immunology, Federal University of Pernambuco/Academic Center of Vitória, Vitória de Santo Antão, CEP 55608- 680, Pernambuco, Brazil
| | - Nereide S Santos-Magalhães
- Biochemistry Sector, Keizo Asami Institute, Federal University of Pernambuco, Recife, CEP 50670-901, Pernambuco, Brazil
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Wang L, Chen QW, Qin YC, Yi XL, Zeng H. Analysis of carbapenem-resistant Acinetobacter baumannii carbapenemase gene distribution and biofilm formation. INTERNATIONAL JOURNAL OF MOLECULAR EPIDEMIOLOGY AND GENETICS 2024; 15:1-11. [PMID: 38505565 PMCID: PMC10944714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/21/2024] [Indexed: 03/21/2024]
Abstract
OBJECTIVE In recent years, Acinetobacter baumannii has been appearing in hospitals with high drug resistance and strong vitality, which brings many difficulties to clinical treatment. In this study, 255 strains of A. baumannii were isolated from Youjiang Medical University for Nationalities Affiliated Hospital clinical samples and found to be highly resistant to carbapenems. The drug resistance, biofilm-forming ability, and carbapenase gene distribution of 145 carbapenem-resistant A. baumannii (CRAB) strains were analyzed statistically. METHODS The clinically isolated strains were detected using Vitek mass spectrometry and Vitek2-compact for bacterial identification and susceptibility testing, respectively. The biofilms of clinical isolates were quantitatively detected by microplate crystal violet staining, and qualitatively observed by confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). And the common carbapenemase genes were detected by polymerase chain reaction (PCR). RESULTS The 255 clinical isolates from the Youjiang District of western Guangxi Province had a high resistance rate to carbapenems antibiotics. The main specimens were from the intensive care unit (49%), and the most important specimens were sputum specimens (80%). All 145 strains of CRAB produced different degrees of biofilm, and six carbapenenase genes were detected. We found that there were significant differences in biofilm formation between resistant and sensitive strains of tobramycin, levofloxacin, ciprofloxacin, tigecycline, and doxycycline (P<0.05). The distribution of blaOXA-23 and blaOXA51 genes was significantly different from CRAB biofilm formation (P<0.05). In addition, AmpC, blaOXA-23, blaOXA-51, and TEM genes were more distributed in antibiotic-resistant strains. CONCLUSION The clinical strains have a high resistance rate to carbapenems, and the CRAB with blaOXA-51 and blaOXA-23 genes has a high resistance to antibiotics and a strong biofilm.
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Affiliation(s)
- Lin Wang
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
| | - Qi-Wei Chen
- The Affiliated Hospital of Youjiang Medical University for NationalitiesNo. 18 Zhongshan Second Road, Baise 533000, Guangxi, PR China
| | - Yan-Chun Qin
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
| | - Xue-Li Yi
- The Affiliated Hospital of Youjiang Medical University for NationalitiesNo. 18 Zhongshan Second Road, Baise 533000, Guangxi, PR China
| | - Hong Zeng
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
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Khoshbakht R, Panahi S, Neshani A, Ghavidel M, Ghazvini K. Novel approaches to overcome Colistin resistance in Acinetobacter baumannii: Exploring quorum quenching as a potential solution. Microb Pathog 2023; 182:106264. [PMID: 37474078 DOI: 10.1016/j.micpath.2023.106264] [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: 06/28/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/22/2023]
Abstract
Acinetobacter baumannii is responsible for a variety of infections, such as nosocomial infections. In recent years, this pathogen has gained resistance to many antibiotics, and thus, carbapenems were used to treat infections with MDR A. baumannii strains in clinical settings. However, as carbapenem-resistant isolates are becoming increasingly prevalent, Colistin is now used as the last line of defense against resistant A. baumannii strains. Unfortunately, reports are increasing on the presence of Colistin-resistant phenotypes in infections caused by A. baumannii, creating an urgent need to find a substitute way to combat these resistant isolates. Quorum sensing inhibition, also known as quorum quenching, is an efficient alternative way of reversing resistance in different Gram-negative bacteria. Quorum sensing is a mechanism used by bacteria to communicate with each other by secreting signal molecules. When the population of bacteria increases and the concentration of signal molecules reaches a certain threshold, bacteria can implement mechanisms to adapt to a hostile environment, such as biofilm formation. Biofilms have many advantages for pathogens, such as antibiotic resistance. Different studies have revealed that disrupting the biofilm of A. baumannii makes it more susceptible to antibiotics. Although very few studies have been conducted on the biofilm disruption through quorum quenching in Colistin-resistant A. baumannii, these studies and similar studies bring hope in finding an alternative way of treating the Colistin-resistant isolates. In conclusion, quorum quenching has the potential to be used against Colistin-resistant A. baumannii.
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Affiliation(s)
- Reza Khoshbakht
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Susan Panahi
- Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Alireza Neshani
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahdis Ghavidel
- Shahid Hasheminejad Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Kiarash Ghazvini
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Microbiology and Virology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Bai YB, Yang XR, Li B, Zhou XZ, Wang WW, Cheng FS, Zhang JY. Virtual Screening and In Vitro Experimental Verification of LuxS Inhibitors for Escherichia coli O157:H7. Microbiol Spectr 2023; 11:e0350222. [PMID: 36809060 PMCID: PMC10100900 DOI: 10.1128/spectrum.03502-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 02/02/2023] [Indexed: 02/23/2023] Open
Abstract
Enterohemorrhagic Escherichia coli O157:H7 is an important foodborne pathogen that forms biofilms. In this study, three quorum-sensing (QS) inhibitors (M414-3326, 3254-3286, and L413-0180) were obtained through virtual screening, and their in vitro antibiofilm activities were validated. Briefly, the three-dimensional structure model of LuxS was constructed and characterized using the SWISS-MODEL. High-affinity inhibitors were screened from the ChemDiv database (1,535,478 compounds) using LuxS as a ligand. Five compounds (L449-1159, L368-0079, M414-3326, 3254-3286, and L413-0180) with a good inhibitory effect (50% inhibitory concentration <10 μM) on type II QS signal molecule autoinducer-2 (AI-2) were obtained using a AI-2 bioluminescence assay. The absorption, distribution, metabolism, excretion, and toxicity (ADMET) properties predicated that the five compounds had high intestinal absorption levels (high) and plasma protein binding (absorbent strong) and did not inhibit the metabolism of CYP2D6 metabolic enzymes. In addition, molecular dynamics simulation showed that compounds L449-1159 and L368-0079 could not stably bind with LuxS. Thus, these compounds were excluded. Furthermore, surface plasmon resonance results showed that the three compounds could specifically bind to LuxS. IN addition, the three compounds could effectively inhibit the biofilm formation without affecting the growth and metabolism of the bacteria. Finally, the reverse transcription-quantitative PCR results showed that the three compounds downregulated the expression of the LuxS gene. Overall, these results revealed that the three compounds obtained through virtual screening could inhibit biofilm formation of E. coli O157:H7 and are potential LuxS inhibitors that can be used to treat E. coli O157:H7 infections. IMPORTANCE E. coli O157:H7 is a foodborne pathogen of public health importance. Quorum sensing (QS) is a form of bacterial communication that can regulate various group behaviors, including biofilm formation. Here, we identified three QS AI-2 inhibitors (M414-3326, 3254-3286, and L413-0180) that can stably and specifically bind to LuxS protein. The three QS AI-2 inhibitors inhibited biofilm formation without affecting the growth and metabolic activity of E. coli O157:H7. The three QS AI-2 inhibitors are promising agents for treating E. coli O157:H7 infections. Further studies to identify the mechanism of the three QS AI-2 inhibitors are needed to develop new drugs to overcome antibiotic resistance.
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Affiliation(s)
- Yu-Bin Bai
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
| | - Xiao-Rong Yang
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
| | - Bing Li
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
| | - Xu-Zheng Zhou
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
| | - Wei-Wei Wang
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
| | - Fu-Sheng Cheng
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
| | - Ji-Yu Zhang
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, Gansu, People’s Republic of China
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, Gansu, People’s Republic of China
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, People’s Republic of China
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Pyrogallol downregulates the expression of virulence-associated proteins in Acinetobacter baumannii and showing anti-infection activity by improving non-specific immune response in zebrafish model. Int J Biol Macromol 2023; 226:853-869. [PMID: 36526063 DOI: 10.1016/j.ijbiomac.2022.12.045] [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: 08/10/2022] [Revised: 11/23/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022]
Abstract
Acinetobacter baumannii, a virulent uropathogen with widespread antibiotic resistance, has arisen as a critical scientific challenge, necessitating the development of innovative therapeutic agents. This is the first study reveal the proteomic changes in A. baumannii upon pyrogallol treatment for understanding the mechanisms using nano-LC-MS/MS-based quantitative proteomics and qPCR analysis. The obtained results found that pyrogallol treatment dramatically downregulated the expression level of several key proteins such as GroEL, DnaK, ClpB, SodB, KatE, Bap, CsuA/B, PgaA, PgaC, BfmR, OmpA, and SecA in A. baumannii, which are involved in chaperone-mediated oxidative stress responses, antioxidant defence system, biofilm formation, virulence enzyme production, bacterial adhesion, capsule formation, and antibiotic resistance. Accordingly, the pyrogallol dramatically enhanced the lifespan of A. baumannii-infected zebrafish by inhibiting bacterial colonization, demonstrating the anti-infective potential of pyrogallol against A. baumannii. Further, the histopathological results also demonstrated the disease protection efficacy of pyrogallol against the pathognomonic sign of A. baumannii infection. In addition, the pyrogallol treatment effectively improved the immune parameters such as serum myeloperoxidase activity, leukocyte respiratory burst activity, and serum lysozyme activity in zebrafish against A. baumannii infection. Based on the results, the present study strongly proposes pyrogallol as a promising therapeutic agent for treating A. baumannii infection.
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He X, Zhang W, Cao Q, Li Y, Bao G, Lin T, Bao J, Chang C, Yang C, Yin Y, Xu J, Ren Z, Jin Y, Lu F. Global Downregulation of Penicillin Resistance and Biofilm Formation by MRSA Is Associated with the Interaction between Kaempferol Rhamnosides and Quercetin. Microbiol Spectr 2022; 10:e0278222. [PMID: 36354319 PMCID: PMC9769653 DOI: 10.1128/spectrum.02782-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/24/2022] [Indexed: 11/12/2022] Open
Abstract
The rapid development of methicillin-resistant Staphylococcus aureus (MRSA) drug resistance and the formation of biofilms seriously challenge the clinical application of classic antibiotics. Extracts of the traditional herb Chenopodium ambrosioides L. were found to have strong antibiofilm activity against MRSA, but their mechanism of action remains poorly understood. This study was designed to investigate the antibacterial and antibiofilm activities against MRSA of flavonoids identified from C. ambrosioides L. in combination with classic antibiotics, including ceftazidime, erythromycin, levofloxacin, penicillin G, and vancomycin. Liquid chromatography-mass spectrometry (LC-MS) was used to analyze the nonvolatile chemical compositions. Reverse transcription (RT)-PCR was used to investigate potential multitargets of flavonoids based on global transcriptional responses of virulence and antibiotic resistance. A synergistic antibacterial and biofilm-inhibiting activity of the alcoholic extract of the ear of C. ambrosioides L. in combination with penicillin G was observed against MRSA, which proved to be closely related to the interaction of the main components of kaempferol rhamnosides with quercetin. In regard to the mechanism, the increased sensitivity of MRSA to penicillin G was shown to be related to the downregulation of penicillinase with SarA as a potential drug target, while the antibiofilm activity was mainly related to downregulation of various virulence factors involved in the initial and mature stages of biofilm development, with SarA and/or σB as drug targets. This study provides a theoretical basis for further exploration of the medicinal activity of kaempferol rhamnosides and quercetin and their application in combination with penicillin G against MRSA biofilm infection. IMPORTANCE In this study, the synergistic antibacterial and antibiofilm effects of the traditional herb C. ambrosioides L. and the classic antibiotic penicillin G on MRSA provide a potential strategy to deal with the rapid development of MRSA antibiotic resistance. This study also provides a theoretical basis for further optimizing the combined effect of kaempferol rhamnosides, quercetin, and penicillin G and exploring anti-MRSA biofilm infection research with SarA and σB as drug targets.
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Affiliation(s)
- Xinlong He
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Wenwen Zhang
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Qingchao Cao
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, People’s Republic of China
| | - Yinyue Li
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Guangyu Bao
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
| | - Tao Lin
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
| | - Jiaojiao Bao
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
| | - Caiwang Chang
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
| | - Changshui Yang
- Department of Pharmacy, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Yi Yin
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Jiahui Xu
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Zhenyu Ren
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
| | - Yingshan Jin
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
| | - Feng Lu
- Department of Pathogenic Biology, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Affiliated Hospital of Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, School of Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
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