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Asadzadegan R, Haratian N, Sadeghi M, Maroufizadeh S, Mobayen M, Sedigh Ebrahim Saraei H, Hasannejad‐Bibalan M. Antibiofilm and antimicrobial activity of Lactobacillus cell free supernatant against Pseudomonas aeruginosa isolated from burn wounds. Int Wound J 2023; 20:4112-4121. [PMID: 37455022 PMCID: PMC10681627 DOI: 10.1111/iwj.14305] [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: 06/03/2023] [Revised: 06/19/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023] Open
Abstract
The present study investigated the antimicrobial and anti-biofilm effects of indigenous Lactobacillus probiotic strains on Pseudomonas aeruginosa isolated from burn wound infection in laboratory conditions. The effect of 7 probiotic strains isolated from infant faeces on the pathogenicity factors of P. aeruginosa, including protease, elastase, antibiofilm and antipyocyanin was measured. Also, diffusion methods in the well and micro broth dilution were used to evaluate the antimicrobial activity of probiotics. All tests were performed in triplicate. A negative control and a positive control were used for each test. SPSS version 22 software was used for statistical analysis, and a p < 0.05 was considered statistically significant. A total of 30 clinical isolates of P. aeruginosa were isolated. The elastolytic activity of P. aeruginosa isolates decreased after adding Cell free supernatant (CFS) of each Lactobacillus. L1, L4, L5, and L6 strains had a 100% inhibitory effect on pathogen isolates. L3 and L7 strains had the lowest inhibitory effect. The inhibitory effect of CFS extracted from lactobacilli on protease production by P. aeruginosa. L1, L4, L5, and L6 strains had an inhibitory effect on all tested isolates. L2, L3, and L7 strains had a less inhibitory effect. L4 strain had the highest inhibitory effect on pyocyanin production by P. aeruginosa (50%), followed by L5 (43.3%), L1 (40%), and L6 (23.3%) strains. L3 and L7 strains had no inhibitory effect on the pyocyanin production of P. aeruginosa isolates. It was found that the CFS of 4 isolates (L1, L4, L5, and L6) was the most active extract and had a 100% inhibitory effect against biofilm formation of all P. aeruginosa strains. The L3 strain had the least inhibitory effect against the biofilm formation of pathogens. Overall, this study showed that probiotics could be promising alternatives to combat the pathogenicity of P. aeruginosa in burn wounds.
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Affiliation(s)
- Reza Asadzadegan
- Student Research Committee, School of MedicineGuilan University of Medical SciencesRashtIran
| | - Negar Haratian
- Farhikhtegan Medical Convergence Sciences Research Center,Farhikhtegan Hospital Tehran Medical SciencesIslamic AzadUniversityTehranIran
| | - Mahsa Sadeghi
- Burn and Regenerative Medicine Research CenterGuilan University of Medical SciencesRashtIran
- Department of Microbiology, School of MedicineGuilan University of Medical SciencesRashtIran
| | - Saman Maroufizadeh
- Department of Biostatistics and Epidemiology, School of HealthGuilan University of Medical SciencesRashtIran
| | - Mohammadreza Mobayen
- Burn and Regenerative Medicine Research CenterGuilan University of Medical SciencesRashtIran
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Yuanyuan N, Xiaobo Y, Shang W, Yutong Y, Hongrui Z, Chenyu L, Bin X, Xi Z, Chen Z, Zhiqiang S, Jingfeng W, Yun L, Pingfeng Y, Zhigang Q. Isolation and characterization of two homolog phages infecting Pseudomonas aeruginosa. Front Microbiol 2022; 13:946251. [PMID: 35935197 PMCID: PMC9348578 DOI: 10.3389/fmicb.2022.946251] [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: 05/17/2022] [Accepted: 06/24/2022] [Indexed: 12/02/2022] Open
Abstract
Bacteriophages (phages) are capable of infecting specific bacteria, and therefore can be used as a biological control agent to control bacteria-induced animal, plant, and human diseases. In this study, two homolog phages (named PPAY and PPAT) that infect Pseudomonas aeruginosa PAO1 were isolated and characterized. The results of the phage plaque assay showed that PPAT plaques were transparent dots, while the PPAY plaques were translucent dots with a halo. Transmission electron microscopy results showed that PPAT (65 nm) and PPAY (60 nm) strains are similar in size and have an icosahedral head and a short tail. Therefore, these belong to the short-tailed phage family Podoviridae. One-step growth curves revealed the latent period of 20 min and burst time of 30 min for PPAT and PPAY. The burst size of PPAT (953 PFUs/infected cell) was higher than that of PPAY (457 PFUs/infected cell). Also, the adsorption rate constant of PPAT (5.97 × 10−7 ml/min) was higher than that of PPAY (1.32 × 10−7 ml/min) at 5 min. Whole-genome sequencing of phages was carried out using the Illumina HiSeq platform. The genomes of PPAT and PPAY have 54,888 and 50,154 bp, respectively. Only 17 of the 352 predicted ORFs of PPAT could be matched to homologous genes of known function. Likewise, among the 351 predicted ORFs of PPAY, only 18 ORFs could be matched to genes of established functions. Homology and evolutionary analysis indicated that PPAT and PPAY are closely related to PA11. The presence of tail fiber proteins in PPAY but not in PPAT may have contributed to the halo effect of its plaque spots. In all, PPAT and PPAY, newly discovered P. aeruginosa phages, showed growth inhibitory effects on bacteria and can be used for research and clinical purposes.
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Affiliation(s)
- Niu Yuanyuan
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Yang Xiaobo
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Wang Shang
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Yang Yutong
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Zhou Hongrui
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Li Chenyu
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Xue Bin
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Zhang Xi
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Zhao Chen
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Shen Zhiqiang
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Wang Jingfeng
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Ling Yun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
- *Correspondence: Ling Yun,
| | - Yu Pingfeng
- College of Environment and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Qiu Zhigang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, TianJin Institute of Environmental and Operational Medicine, Tianjin, China
- Qiu Zhigang,
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Koupaei M, Saderi H, Amin Marashi SM, Fathizadeh H, Owlia P. Evaluation of the effect of Saccharomyces cerevisiae on the expression of enterotoxin genes in Escherichia coli O157: H7 (EHEC) and Escherichia coli H10407 (ETEC). Microb Pathog 2022; 164:105450. [DOI: 10.1016/j.micpath.2022.105450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 02/08/2022] [Accepted: 02/15/2022] [Indexed: 02/07/2023]
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