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Wu J, Wang M, He T, Li X, Liu B, Chen F, Geng Y, Lai W, Huang X, Chen D, Ouyang P. Evaluation of the antibacterial activity and mechanism of cannabigerol against drug-resistant Streptococcus iniae in vitro. Arch Microbiol 2025; 207:102. [PMID: 40146372 DOI: 10.1007/s00203-025-04311-5] [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: 11/21/2024] [Revised: 03/12/2025] [Accepted: 03/18/2025] [Indexed: 03/28/2025]
Abstract
This study aimed to investigate the antibacterial effects and mechanism of cannabigerol against drug-resistant Streptococcus iniae. The determination of antibacterial activity was based on the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC), growth curve analysis, time-kill assay, biofilm inhibition and eradication assessments. The antibacterial mechanism was explored by DNA leakage assay, assessment of cell membrane permeability, evaluation of cell membrane integrity, measurement of membrane potential, determination of respiratory chain dehydrogenase activity, and examination by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results demonstrated that cannabigerol effectively inhibited the growth and biofilm formation of Streptococcus iniae in vitro. Mechanistically, cannabigerol induced DNA leakage, impaired cell membrane integrity, hyperpolarized membrane potential, and reduced respiratory chain dehydrogenase activity in S. iniae. In conclusion, these findings suggest that cannabigerol inhibited the growth of S. iniae by disrupting the cell membrane.
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Affiliation(s)
- Jianing Wu
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
- Animal Laboratory Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Minmin Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Tingke He
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiaonan Li
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Bowen Liu
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Fen Chen
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yi Geng
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
- Sichuan Aquatic Animal Disease Surveillance and Control Center, Chengdu, Sichuan, 611130, China
| | - Weiming Lai
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiaoli Huang
- Department of Aquaculture, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Defang Chen
- Department of Aquaculture, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ping Ouyang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
- Sichuan Aquatic Animal Disease Surveillance and Control Center, Chengdu, Sichuan, 611130, China.
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Glajzner P, Szewczyk EM, Szemraj M. Pathogenicity and drug resistance of animal streptococci responsible for human infections. J Med Microbiol 2021; 70. [PMID: 33750514 DOI: 10.1099/jmm.0.001339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Bacteria of the genus Streptococcus, earlier considered typically animal, currently have also been causing infections in humans. It is necessary to make clinicians aware of the emergence of new species that may cause the development of human diseases. There is an increasing frequency of isolation of streptococci such as S. suis, S. dysgalactiae, S. iniae and S. equi from people. Isolation of Streptococcus bovis/Streptococcus equinus complex bacteria has also been reported. The streptococcal species described in this review are gaining new properties and virulence factors by which they can thrive in new environments. It shows the potential of these bacteria to changes in the genome and the settlement of new hosts. Information is presented on clinical cases that concern streptococcus species belonging to the groups Bovis, Pyogenic and Suis. We also present the antibiotic resistance profiles of these bacteria. The emerging resistance to β-lactams has been reported. In this review, the classification, clinical characteristics and antibiotic resistance of groups and species of streptococci considered as animal pathogens are summarized.
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Affiliation(s)
- Paulina Glajzner
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Lodz, Lodz, Poland
| | - Eligia Maria Szewczyk
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Lodz, Lodz, Poland
| | - Magdalena Szemraj
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Lodz, Lodz, Poland
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