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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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da Costa de Souza G, Roque-Borda CA, Pavan FR. Beta-lactam resistance and the effectiveness of antimicrobial peptides against KPC-producing bacteria. Drug Dev Res 2022; 83:1534-1554. [PMID: 36042694 DOI: 10.1002/ddr.21990] [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: 05/02/2022] [Revised: 07/07/2022] [Accepted: 07/22/2022] [Indexed: 11/12/2022]
Abstract
Bacterial resistance is a problem that is giving serious cause for concern because bacterial strains such as Acinetobacter baumannii and Pseudomonas aeruginosa are difficult to treat and highly opportunistic. These bacteria easily acquire resistance genes even from other species, which confers greater persistence and tolerance towards conventional antibiotics. These bacteria have the highest death rate in hospitalized intensive care patients, so strong measures must be taken. In this review, we focus on the use of antimicrobial peptides (AMPs) as an alternative to traditional drugs, due to their rapid action and lower risk of generating resistance by microorganisms. We also present an overview of beta-lactams and explicitly explain the activity of AMPs against carbapenemase-producing bacteria as potential alternative agents for infection control.
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Affiliation(s)
- Guilherme da Costa de Souza
- School of Pharmaceutical Sciences, Tuberculosis Research Laboratory, São Paulo State University, São Paulo, Brazil
| | - Cesar Augusto Roque-Borda
- School of Pharmaceutical Sciences, Tuberculosis Research Laboratory, São Paulo State University, São Paulo, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, Tuberculosis Research Laboratory, São Paulo State University, São Paulo, Brazil
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Yan T, Li F, Li J, Chen F. Antifungal Activity of ToAP2D Peptide Against Sporothrix globosa. Front Bioeng Biotechnol 2021; 9:761518. [PMID: 34746111 PMCID: PMC8566951 DOI: 10.3389/fbioe.2021.761518] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 09/10/2021] [Indexed: 01/09/2023] Open
Abstract
Improving clinical efficacy and reducing treatment time have been the focus of sporotrichosis therapy. Antimicrobial peptides ToAP2A, ToAP2C, and ToAP2D were synthesized on the basis of ToAP2 (AP02759), a peptide derived from the antimicrobial peptide database by the database filtering technology, and their physicochemical characteristics were analyzed. Compared with template peptide ToAP2, the modified peptides had much shorter length, lower molecular weight but significantly greater stability, which in return resulted in increases in the aliphatic index, hydrophilicity, and protein binding ability. Here, we show that the three derived peptides inhibit the growth of Sporothrix globosa, among which ToAP2D had the strongest anti-fungal activity. ToAP2D showed good serum stability without acute toxicity. The ToAP2D treatment inhibited the growth of S. globosa and enhanced apoptosis, which was evidenced by the upregulation of apoptosis-related protein caspase-3. The scanning electron microscopy analysis revealed deformation and rupture of S. globosa. The levels of mitochondrial membrane potential were decreased and that of the reactive oxygen species (ROS) were increased in S. globosa upon ToAP2D treatment. Moreover, ToAP2D activated metacaspase. In the in vivo study, we further demonstrated that ToAP2D inhibited the S. globosa infection of mice footpads, and its efficiency was nearly comparable to itraconazole. In summary, our results suggest that antimicrobial peptide ToAP2D has the potential for sporotrichosis therapy.
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Affiliation(s)
- Tianyi Yan
- Department of Dermatology, Second Hospital of Jilin University, Changchun, China
| | - Fuqiu Li
- Department of Dermatology, Second Hospital of Jilin University, Changchun, China
| | - Jinran Li
- Department of Dermatology, Second Hospital of Jilin University, Changchun, China
| | - Feng Chen
- Department of Dermatology, China-Japan Union Hospital of Jilin University, Changchun, China
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Ghoreishi FS, Roghanian R, Emtiazi G. Novel Chronic Wound Healing by Anti-biofilm Peptides and Protease. Adv Pharm Bull 2021; 12:424-436. [PMID: 35935044 PMCID: PMC9348543 DOI: 10.34172/apb.2022.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/23/2021] [Accepted: 03/25/2021] [Indexed: 11/25/2022] Open
Abstract
Chronic wounds have made a challenge in medical healthcare due to their biofilm infections, which reduce the penetrance of the antibacterial agents in the injury site. In infected wounds, the most common bacterial strains are Staphylococcus aureus and Pseudomonas aeruginosa. Biofilm disruption in chronic wounds is crucial in wound healing. Due to their broad-spectrum antibacterial properties and fewer side effects, anti-biofilm peptides, especially bacteriocins, are promising in the healing of chronic wounds by biofilm destruction. This study reviews the effects of antimicrobial and anti-biofilm agents, including bacteriocins and protease enzymes as a novel approach, on wound healing, along with analyzing the molecular docking between a bacterial protease and biofilm components. Among a large number of anti-biofilm bacteriocins identified up to now, seven types have been registered in the antimicrobial peptides (AMPs) database. Although it is believed that bacterial proteases are harmful in wound healing, it has recently been demonstrated that these proteases like the human serine protease, in combination with AMPs, can improve wound healing by biofilm destruction. In this work, docking results between metalloprotease from Paenibacillus polymyxa and proteins of S. aureus and P. aeruginosa involved in biofilm production, showed that this bacterial protease could efficiently interact with biofilm components. Infected wound healing is an important challenge in clinical trials due to biofilm production by bacterial pathogens. Therefore, simultaneous use of proteases or anti-biofilm peptides with antimicrobial agents could be a promising method for chronic wound healing.
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Affiliation(s)
- Fatemeh Sadat Ghoreishi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Rasoul Roghanian
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Giti Emtiazi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
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