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Su X, Yu H, Wang X, Zhang C, Wang H, Kong X, Qu Y, Luan Y, Meng Y, Guan J, Song G, Wang L, Song W, Zhao Y. Cyanidin chloride protects mice from methicillin-resistant Staphylococcus aureus-induced pneumonia by targeting Sortase A. Virulence 2022; 13:1434-1445. [PMID: 35983964 PMCID: PMC9397467 DOI: 10.1080/21505594.2022.2112831] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has been developing rapidly in recent years. It poses a severe peril to global health care, and the new strategies to against the MRSA is urgently needed. Sortase A (SrtA) regulates the anchoring of many surface proteins. Compounds repress Staphylococcus aureus (S. aureus) cysteine transpeptidase SrtA are considered adequate potent virulence inhibitors. Then, we describe the identification of an effective SrtA inhibitor, cyanidin chloride, a bioflavonoid compound isolated from various plants. It has a reversible inhibitory effect on SrtA activity at an IC50 of 21.91 μg/mL. As a SrtA inhibitor, cyanidin chloride antagonizes SrtA-related virulence phenotypes due to its breadth and specificity, including fibrinogen adhesion, A549 cell invasion, biofilm formation, and surface protein (SpA) anchoring. Subsequently, molecular docking and fluorescence quenching revealed that SrtA and cyanidin chloride had robust mutual affinity. Further mechanistic studies revealed that Arg-197, Gly-167, and Sep-116 were the key-binding sites mediating the interaction between SrtA and cyanidin chloride. Notably, a significant therapeutic effect of cyanidin chloride in vivo was also observed on the mouse pneumonia model induced by MRSA. In conclusion, our study indicates that cyanidin chloride potentially represents a new candidate SrtA inhibitor for S. aureus and potentially be developed as a new antivirulence agent.
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Affiliation(s)
- Xin Su
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Hangqian Yu
- Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Xingye Wang
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Chi Zhang
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Heming Wang
- Department of Gastroenterology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Xiangri Kong
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China,College of Animal Science, Jilin University, Changchun, China
| | - Yishen Qu
- Endocrinology Department, Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, China
| | - Yanhe Luan
- College of Animal Science, Jilin University, Changchun, China
| | - Ying Meng
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Jiyu Guan
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Guangqi Song
- Department of Gastroenterology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Li Wang
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China,CONTACT Li Wang
| | - Wu Song
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China,Wu Song
| | - Yicheng Zhao
- College of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China,Yicheng Zhao
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