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Li G, Wang G, Li M, Li L, Liu H, Sun M, Wen Z. Morin inhibits Listeria monocytogenes virulence in vivo and in vitro by targeting listeriolysin O and inflammation. BMC Microbiol 2020; 20:112. [PMID: 32398085 PMCID: PMC7216731 DOI: 10.1186/s12866-020-01807-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 04/29/2020] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Listeria monocytogenes (L. monocytogenes) is a global opportunistic intracellular pathogen that can cause many infections, including meningitis and abortion in humans and animals; thus, L. monocytogenes poses a great threat to public safety and the development of the aquaculture industry. The isolation rate of Listeria monocytogenes in fishery products has always been high. And the pore-forming toxin listeriolysin O (LLO) is one of the most important virulence factors of L. monocytogenes. LLO can promote cytosolic bacterial proliferation and help the pathogen evade attacks from the host immune system. In addition, L. monocytogenes infection can trigger a series of severe inflammatory reactions. RESULTS Here, we further confirmed that morin lacking anti-Listeria activity could inhibit LLO oligomerization. We also found that morin can effectively alleviate the inflammation induced by Listeria in vivo and in vitro and exerted an obvious protective effect on infected cells and mice. CONCLUSIONS Morin does not possess anti-Listeria activity, neither does it interfere with secretion of LLO. However, morin inhibits oligomerisation of LLO and morin does reduce the inflammation caused during Listeria infection.
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Affiliation(s)
- Gen Li
- Department of Respiratory Medicine, The First Hospital of Jilin University, Jilin University, Changchun, Jilin, 130021, China.,Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Guizhen Wang
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China.,College of Food Engineering, Jilin Engineering Normal University, Changchun, China
| | - Meng Li
- Department of Respiratory Medicine, The First Hospital of Jilin University, Jilin University, Changchun, Jilin, 130021, China.,Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Li Li
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Hongtao Liu
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Meiyang Sun
- Department of Breast Surgery, Jilin Provincial Cancer Hospital, Changchun, China
| | - Zhongmei Wen
- Department of Respiratory Medicine, The First Hospital of Jilin University, Jilin University, Changchun, Jilin, 130021, China.
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