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Wang X, Chen C, Hu J, Liu C, Ning Y, Lu F. Current strategies for monitoring and controlling bacterial biofilm formation on medical surfaces. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 282:116709. [PMID: 39024943 DOI: 10.1016/j.ecoenv.2024.116709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 07/03/2024] [Accepted: 07/07/2024] [Indexed: 07/20/2024]
Abstract
Biofilms, intricate microbial communities that attach to surfaces, especially medical devices, form an exopolysaccharide matrix, which enables bacteria to resist environmental pressures and conventional antimicrobial agents, leading to the emergence of multi-drug resistance. Biofilm-related infections associated with medical devices are a significant public health threat, compromising device performance. Therefore, developing effective methods for supervising and managing biofilm growth is imperative. This in-depth review presents a systematic overview of strategies for monitoring and controlling bacterial biofilms. We first outline the biofilm creation process and its regulatory mechanisms. The discussion then progresses to advancements in biosensors for biofilm detection and diverse treatment strategies. Lastly, this review examines the obstacles and new perspectives associated with this domain to facilitate the advancement of innovative monitoring and control solutions. These advancements are vital in combating the spread of multi drug-resistant bacteria and mitigating public health risks associated with infections from biofilm formation on medical instruments.
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Affiliation(s)
- Xiaoqi Wang
- Department of integrated traditional Chinese and Western Medicine, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China
| | - Chunjing Chen
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China
| | - Jue Hu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China
| | - Chang Liu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China
| | - Yi Ning
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China.
| | - Fangguo Lu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, People's Republic of China.
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Ashrafudoulla M, Yun H, Ashikur Rahman M, Jung SJ, Jie-Won Ha A, Anamul Hasan Chowdhury M, Shaila S, Akter S, Park SH, Ha SD. Prophylactic efficacy of baicalin and carvacrol against Salmonella Typhimurium biofilm on food and food contact surfaces. Food Res Int 2024; 187:114458. [PMID: 38763690 DOI: 10.1016/j.foodres.2024.114458] [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: 03/26/2024] [Revised: 04/28/2024] [Accepted: 05/01/2024] [Indexed: 05/21/2024]
Abstract
This study examines the antimicrobial and antibiofilm effectiveness of baicalin and carvacrol against Salmonella enterica ser. Typhimurium on food contact surfaces and chicken meat. The minimum inhibitory concentrations (MIC) for baicalin and carvacrol were found to be 100 μg/mL and 200 μg/mL, respectively, which aligns with findings from previous studies. The compounds exhibited a concentration-dependent decrease in microbial populations and biofilm formation. When used together, they displayed a remarkable synergistic effect, greatly augmenting their antibacterial activity. The assessment of food quality demonstrated that these treatments have no negative impact on the sensory characteristics of chicken meat. The impact of the structure on biofilms was observed through the use of Field Emission Scanning Electron Microscopy (FE-SEM) and Confocal Laser Scanning Microscopy (CLSM), revealing disrupted biofilm architectures and decreased cell viability. Crucially, RT-PCR analysis revealed a marked downregulation of quorum sensing (luxS), virulence (hilA), and stress response (rpoS) genes, highlighting the multifaceted antimicrobial mechanism of action. This gene-specific suppression suggests a targeted disruption of bacterial communication and virulence pathways, offering insight into the comprehensive antibiofilm strategy. This provides further insight into the molecular mechanisms that contribute to their antibiofilm effects.
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Affiliation(s)
- Md Ashrafudoulla
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea; National Institute of Health, 9000 Rockville Pike, Bethesda, MD 20892, USA
| | - Hyojae Yun
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Md Ashikur Rahman
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Soo-Jin Jung
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Angela Jie-Won Ha
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea; Grand Hyatt Jeju, 12 Noyeon-ro, Jeju-si, Jeju-do, South Korea
| | - Md Anamul Hasan Chowdhury
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Shanjida Shaila
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Shirin Akter
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Si Hong Park
- Food Science and Technology, Oregon State University, Corvallis, OR, USA
| | - Sang-Do Ha
- School of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Anseong, Gyeonggi-do 456-756, Republic of Korea.
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3
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Ma C, Mei C, Liu J, Li H, Jiao M, Hu H, Zhang Y, Xiong J, He Y, Wei W, Yang H, Chen H. Effect of baicalin on eradicating biofilms of bovine milk derived Acinetobacter lwoffii. BMC Vet Res 2024; 20:212. [PMID: 38764041 PMCID: PMC11103975 DOI: 10.1186/s12917-024-04015-w] [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: 12/21/2023] [Accepted: 04/12/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND Acinetobacter lwoffii (A.lwoffii) is a serious zoonotic pathogen that has been identified as a cause of infections such as meningitis, bacteremia and pneumonia. In recent years, the infection rate and detection rate of A.lwoffii is increasing, especially in the breeding industry. Due to the presence of biofilms, it is difficult to eradicate and has become a potential super drug-resistant bacteria. Therefore, eradication of preformed biofilm is an alternative therapeutic action to control A.lwoffii infection. The present study aimed to clarify that baicalin could eradicate A.lwoffii biofilm in dairy cows, and to explore the mechanism of baicalin eradicating A.lwoffii. RESULTS The results showed that compared to the control group, the 4 MIC of baicalin significantly eradicated the preformed biofilm, and the effect was stable at this concentration, the number of viable bacteria in the biofilm was decreased by 0.67 Log10CFU/mL. The total fluorescence intensity of biofilm bacteria decreased significantly, with a reduction rate of 67.0%. There were 833 differentially expressed genes (367 up-regulated and 466 down-regulated), whose functions mainly focused on oxidative phosphorylation, biofilm regulation system and trehalose synthesis. Molecular docking analysis predicted 11 groups of target proteins that were well combined with baicalin, and the content of trehalose decreased significantly after the biofilm of A.lwoffii was treated with baicalin. CONCLUSIONS The present study evaluated the antibiofilm potential of baicalin against A.lwoffii. Baicalin revealed strong antibiofilm potential against A.lwoffii. Baicalin induced biofilm eradication may be related to oxidative phosphorylation and TCSs. Moreover, the decrease of trehalose content may be related to biofilm eradication.
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Affiliation(s)
- Chengjun Ma
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Cui Mei
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - JingJing Liu
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Hui Li
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Min Jiao
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Huiming Hu
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Yang Zhang
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Jing Xiong
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Yuzhang He
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Wei Wei
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Hongzao Yang
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China.
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China.
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China.
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China.
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China.
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China.
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Fu S, Tian X, Peng C, Zhang D, Zhou L, Yuan Y, He J, Guo L, Qiu Y, Ye C, Liu Y, Zong B. Baicalin inhibited PANX-1/P2Y6 signaling pathway activation in porcine aortic vascular endothelial cells infected by Glaesserella parasuis. Heliyon 2024; 10:e23632. [PMID: 38187335 PMCID: PMC10770501 DOI: 10.1016/j.heliyon.2023.e23632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 01/09/2024] Open
Abstract
Glaesserella parasuis can induce endothelial barrier damage in piglets, although the mechanism by which this pathogen triggers inflammatory damage remains unclear. Baicalin possesses anti-inflammatory and anti-oxidant activities. However, whether baicalin can relieve endothelial barrier damage caused by Glaesserella parasuis infection has not yet been studied. Hence, we evaluated the ability of baicalin to counteract the changes induced by Glaesserella parasuis in porcine aortic vascular endothelial cells. The results showed that Glaesserella parasuis could upregulate the expression of pannexin 1 channel protein and promote the release of adenosine triphosphate, adenosine diphosphate, adenosine 3'-monophosphate, uridine triphosphate, uridine diphosphate, and uridine monophosphate in porcine aortic vascular endothelial cells. The expression level of purinergic receptor P2Y6 was upregulated in porcine aortic vascular endothelial cells triggered by Glaesserella parasuis. In addition, Glaesserella parasuis could activate phospholipase C-protein kinase C and myosin light chain kinase-myosin light chain signaling pathways in porcine aortic vascular endothelial cells. Baicalin could inhibit pannexin 1 channel protein expression, reduce adenosine triphosphate, adenosine diphosphate, adenosine 3'-monophosphate, uridine triphosphate, uridine diphosphate, and uridine monophosphate release, and attenuate the expression level of P2Y6 in porcine aortic vascular endothelial cells induced by Glaesserella parasuis. Baicalin could also reduce the activation of phospholipase C-protein kinase C and myosin light chain kinase-myosin light chain signaling pathways in porcine aortic vascular endothelial cells triggered by Glaesserella parasuis. Our study report that Glaesserella parasuis could promote pannexin 1 channel protein expression, induce nucleosides substance release, and P2Y6 expression in porcine aortic vascular endothelial cells and baicalin could inhibit the expression levels of pannexin 1, nucleosides substance, and P2Y6 in the porcine aortic vascular endothelial cells induced by Glaesserella parasuis, which might be served as some targets for treatment of inflammation disease caused by Glaesserella parasuis.
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Affiliation(s)
- Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Xinyue Tian
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Chun Peng
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Dan Zhang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Linglu Zhou
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Yuzhen Yuan
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Jing He
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Ling Guo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Chun Ye
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Yu Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
| | - Bingbing Zong
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, PR China
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Pavez VB, Pacheco N, Castro-Severyn J, Pardo-Esté C, Álvarez J, Zepeda P, Krüger G, Gallardo K, Melo F, Vernal R, Aranda C, Remonsellez F, Saavedra CP. Characterization of biofilm formation by Exiguobacterium strains in response to arsenic exposure. Microbiol Spectr 2023; 11:e0265723. [PMID: 37819075 PMCID: PMC10714750 DOI: 10.1128/spectrum.02657-23] [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: 06/27/2023] [Accepted: 08/19/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE In this work, we characterized the composition, structure, and functional potential for biofilm formation of Exiguobacterium strains isolated from the Salar de Huasco in Chile in the presence of arsenic, an abundant metalloid in the Salar that exists in different oxidation states. Our results showed that the Exiguobacterium strains tested exhibit a significant capacity to form biofilms when exposed to arsenic, which would contribute to their resistance to the metalloid. The results highlight the importance of biofilm formation and the presence of specific resistance mechanisms in the ability of microorganisms to survive and thrive under adverse conditions.
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Affiliation(s)
- Valentina B. Pavez
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Nicolás Pacheco
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Juan Castro-Severyn
- Laboratorio de Microbiología Aplicada y Extremófilos, Departamento de Ingeniería Química, Universidad Católica del Norte, Antofagasta, Chile
| | - Coral Pardo-Esté
- Laboratorio de Ecología Molecular y Microbiología Aplicada, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias, Universidad Católica del Norte, Antofagasta, Chile
| | - Javiera Álvarez
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
- Laboratory of Allergic Inflammation, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Phillippi Zepeda
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Gabriel Krüger
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Karem Gallardo
- Centro de Investigación Tecnológica del Agua en el Desierto (CEITSAZA), Universidad Católica del Norte, Antofagasta, Chile
- Departamento de Química, Universidad Católica del Norte, Antofagasta, Chile
| | - Francisco Melo
- Laboratorio de Física no Lineal, Departamento de Física, USACH, Santiago, Chile
| | - Rolando Vernal
- Laboratorio de Biología Periodontal, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - Carlos Aranda
- Laboratorio de Microscopía Avanzada, Departamento de Ciencias Biológicas y Biodiversidad Universidad de Los Lagos, Osorno, Chile
| | - Francisco Remonsellez
- Laboratorio de Microbiología Aplicada y Extremófilos, Departamento de Ingeniería Química, Universidad Católica del Norte, Antofagasta, Chile
- Centro de Investigación Tecnológica del Agua en el Desierto (CEITSAZA), Universidad Católica del Norte, Antofagasta, Chile
| | - Claudia P. Saavedra
- Laboratorio de Microbiología Molecular, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
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Govindarajan DK, Kandaswamy K. Virulence factors of uropathogens and their role in host pathogen interactions. Cell Surf 2022; 8:100075. [PMID: 35198842 PMCID: PMC8841375 DOI: 10.1016/j.tcsw.2022.100075] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/01/2022] [Accepted: 02/06/2022] [Indexed: 12/26/2022] Open
Abstract
Gram-positive and Gram-negative bacterial pathogens are commonly found in Urinary Tract Infection (UTI), particularly infected in females like pregnant women, elder people, sexually active, or individuals prone to other risk factors for UTI. In this article, we review the expression of virulence surface proteins and their interaction with host cells for the most frequently isolated uropathogens: Escherichia coli, Enterococcus faecalis, Proteus mirabilis, Klebsiella pneumoniae, and Staphylococcus saprophyticus. In addition to the host cell interaction, surface protein regulation was also discussed in this article. The surface protein regulation serves as a key tool in differentiating the pathogen isotypes. Furthermore, it might provide insights on novel diagnostic methods to detect uropathogen that are otherwise easily overlooked due to limited culture-based assays. In essence, this review shall provide an in-depth understanding on secretion of virulence factors of various uropathogens and their role in host-pathogen interaction, this knowledge might be useful in the development of therapeutics against uropathogens.
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Affiliation(s)
| | - Kumaravel Kandaswamy
- Corresponding author at: Department of Biotechnology, Kumaraguru College of Technology (KCT), Chinnavedampatti, Coimbatore 641049, Tamil Nadu, India.
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7
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Wang J, Li S, Meng J, Zhu J, Qiu T, Wang W, Ding J, Liu Z, Li K, Lqbal M, Wang D, Wu Y, Liu J. Baicalin acts as an adjuvant to potentiate the activity of azithromycin against Staphylococcus saprophyticus biofilm: an in vitro, in vivo, and molecular study. Vet Res 2022; 53:83. [PMID: 36224607 PMCID: PMC9558388 DOI: 10.1186/s13567-022-01088-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/30/2022] [Indexed: 11/10/2022] Open
Abstract
Staphylococcus saprophyticus is frequently involved in various difficult-to-treat infections due to the formation of biofilms. To identify useful antibiofilm strategies, this study explored the efficacy and mechanism of baicalin in enhancing the ability of azithromycin against multidrug-resistant Staphylococcus saprophyticus-Liu-2016-Liyang, China-francolin (MDRSS) biofilms in vitro and in vivo. When azithromycin was used in combination with baicalin, the minimum inhibitory concentration in biofilm (MICB) for azithromycin decreased 4- to 512-fold. Compared with the azithromycin and baicalin groups, the combination of azithromycin and baicalin could not reduce the biofilm biomass, but the dispersion rates of biofilm were decreased and the bactericidal ability was increased. Furthermore, the relative transcript levels of WalK/R system-related genes were upregulated by the addition of baicalin or azithromycin plus baicalin compared with that of the azithromycin and blank control groups. The strong correlation relationship between the WalK/R system and the bactericidal index demonstrated that baicalin enhanced the bactericidal effect of azithromycin on MDRSS biofilms by modulating the WalK/R system. In the mouse cutaneous infection model, the combination of azithromycin and baicalin succeeded in eradicating MDRSS and decreasing pathological injuries. This study indicated that baicalin has the potential to be an adjuvant to enhance the antimicrobial activity of azithromycin against MDRSS in the biofilm form by modulating the WalK/R system.
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Affiliation(s)
- Jinli Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Siya Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jinwu Meng
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jinyue Zhu
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Tianxin Qiu
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wenjia Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jinxue Ding
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhenguang Liu
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kun Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Mujahid Lqbal
- Department of Pathology, Cholistan University of Veterinary and Animal Sciences (CUVAS), Bahawalpur, 63100, Pakistan
| | - Deyun Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yi Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jiaguo Liu
- MOE Joint International Research Laboratory of Animal Health and Food Safety and Traditional Chinese Veterinary Medicine Research Center, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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