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Chen B, Wang Y, Xie F, Liu H, Dai H. Identification of siderophores blocking infection of Pseudomonas aeruginosa from Kitasatospora sp. LS1784. J Antibiot (Tokyo) 2024; 77:4-12. [PMID: 37950064 DOI: 10.1038/s41429-023-00675-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/17/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023]
Abstract
Siderophores are low-molecular-mass, high-affinity chelators of Fe3+ ions that are critical for the survival of bacteria in ferric deficient environment. Exogenous siderophores are potential bacteriostat by disrupting the iron-uptake process of pathogens. In our previous work to discover siderophores, strain LS1784 was previously predicted to produce new catecholate-type siderophores by genome analysis but no compounds were obtained. In this work, we reclassified train LS1784 as Kitasatospora sp. LS1784 according to the genome phylogenetic analysis. Then guided by CAS colorimetric assay and molecular network analysis, four catecholate-type siderophores were isolated from the ethyl acetate extract of LS1784 which were coincident with the initial prediction. Notably, compounds 2 and 3 were reported for the first time. Following activity screening, compound 3 showed sufficient anti-Pseudomonas aeruginosa-infection activity in Caenorhabditis elegans infection models, whereas all compounds exhibited no antimicrobial activity. These results indicated that compound 3 can enhance the survival of P. aeruginosa infecting C. elegans by reducing the virulence of P. aeruginosa rather than killing P. aeruginosa, which aligns with our previous findings. Moreover, these findings highlight the effectiveness of comprehensive approaches, including genome mining, CAS (Chromeazurol S) testing, and molecular network (MN) analysis, in identifying potential siderophores, thereby expanding the siderophores arsenal in bacteria for the development of anti-infective drugs.
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Affiliation(s)
- Baosong Chen
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichenxi Road, Chaoyang District, Beijing, 100101, China
| | - Yue Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Feng Xie
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichenxi Road, Chaoyang District, Beijing, 100101, China
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichenxi Road, Chaoyang District, Beijing, 100101, China.
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Huanqin Dai
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichenxi Road, Chaoyang District, Beijing, 100101, China.
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Șchiopu P, Toc DA, Colosi IA, Costache C, Ruospo G, Berar G, Gălbău ȘG, Ghilea AC, Botan A, Pană AG, Neculicioiu VS, Todea DA. An Overview of the Factors Involved in Biofilm Production by the Enterococcus Genus. Int J Mol Sci 2023; 24:11577. [PMID: 37511337 PMCID: PMC10380289 DOI: 10.3390/ijms241411577] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/08/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Enterococcus species are known for their ability to form biofilms, which contributes to their survival in extreme environments and involvement in persistent bacterial infections, especially in the case of multi-drug-resistant strains. This review aims to provide a comprehensive understanding of the mechanisms underlying biofilm formation in clinically important species such as Enterococcus faecalis and the less studied but increasingly multi-drug-resistant Enterococcus faecium, and explores potential strategies for their eradication. Biofilm formation in Enterococcus involves a complex interplay of genes and virulence factors, including gelatinase, cytolysin, Secreted antigen A, pili, microbial surface components that recognize adhesive matrix molecules (MSCRAMMs), and DNA release. Quorum sensing, a process of intercellular communication, mediated by peptide pheromones such as Cob, Ccf, and Cpd, plays a crucial role in coordinating biofilm development by targeting gene expression and regulation. Additionally, the regulation of extracellular DNA (eDNA) release has emerged as a fundamental component in biofilm formation. In E. faecalis, the autolysin N-acetylglucosaminidase and proteases such as gelatinase and serin protease are key players in this process, influencing biofilm development and virulence. Targeting eDNA may offer a promising avenue for intervention in biofilm-producing E. faecalis infections. Overall, gaining insights into the intricate mechanisms of biofilm formation in Enterococcus may provide directions for anti-biofilm therapeutic research, with the purpose of reducing the burden of Enterococcus-associated infections.
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Affiliation(s)
- Pavel Șchiopu
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
- Department of Pneumology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400332 Cluj-Napoca, Romania
| | - Dan Alexandru Toc
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Ioana Alina Colosi
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Carmen Costache
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Giuseppe Ruospo
- Faculty of Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - George Berar
- Faculty of Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Ștefan-Gabriel Gălbău
- Faculty of Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Alexandra Cristina Ghilea
- Faculty of Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Alexandru Botan
- Faculty of Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Adrian-Gabriel Pană
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Vlad Sever Neculicioiu
- Department of Microbiology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Doina Adina Todea
- Department of Pneumology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400332 Cluj-Napoca, Romania
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Cringoli MC, Marchesan S. Cysteine Redox Chemistry in Peptide Self-Assembly to Modulate Hydrogelation. Molecules 2023; 28:4970. [PMID: 37446630 DOI: 10.3390/molecules28134970] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Cysteine redox chemistry is widely used in nature to direct protein assembly, and in recent years it has inspired chemists to design self-assembling peptides too. In this concise review, we describe the progress in the field focusing on the recent advancements that make use of Cys thiol-disulfide redox chemistry to modulate hydrogelation of various peptide classes.
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Affiliation(s)
- Maria Cristina Cringoli
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, 34127 Trieste, Italy
| | - Silvia Marchesan
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, 34127 Trieste, Italy
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Cathelicidin LL-37 in Health and Diseases of the Oral Cavity. Biomedicines 2022; 10:biomedicines10051086. [PMID: 35625823 PMCID: PMC9138798 DOI: 10.3390/biomedicines10051086] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 04/30/2022] [Accepted: 05/02/2022] [Indexed: 02/07/2023] Open
Abstract
The mechanisms for maintaining oral cavity homeostasis are subject to the constant influence of many environmental factors, including various chemicals and microorganisms. Most of them act directly on the oral mucosa, which is the mechanical and immune barrier of the oral cavity, and such interaction might lead to the development of various oral pathologies and systemic diseases. Two important players in maintaining oral health or developing oral pathology are the oral microbiota and various immune molecules that are involved in controlling its quantitative and qualitative composition. The LL-37 peptide is an important molecule that upon release from human cathelicidin (hCAP-18) can directly perform antimicrobial action after insertion into surface structures of microorganisms and immunomodulatory function as an agonist of different cell membrane receptors. Oral LL-37 expression is an important factor in oral homeostasis that maintains the physiological microbiota but is also involved in the development of oral dysbiosis, infectious diseases (including viral, bacterial, and fungal infections), autoimmune diseases, and oral carcinomas. This peptide has also been proposed as a marker of inflammation severity and treatment outcome.
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Ding K, Shen P, Xie Z, Wang L, Dang X. In vitro and in vivo antifungal activity of two peptides with the same composition and different distribution. Comp Biochem Physiol C Toxicol Pharmacol 2022; 252:109243. [PMID: 34768011 DOI: 10.1016/j.cbpc.2021.109243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/01/2021] [Accepted: 11/07/2021] [Indexed: 11/20/2022]
Abstract
Candida albicans can cause local or systemic diseases when host immune status is disrupted. Drug resistance to C. albicans highlights the necessity of novel antifungal drugs. Antimicrobial peptides exhibit potential as antifungal drugs. PAF26 was found to exhibit favorable activity against plant pathogenic fungi. However, it showed low antifungal activity against C. albicans. Here, P255 and P256 with the same composition and different distribution were derived from PAF26. P256 exhibited higher antifungal activity against C. albicans than did P255 and PAF26. P256 and P255 exhibited synergism when combined with amphotericin B (AMB). Both peptides reduced cell wall integrity, rapidly increased membrane permeability, disrupted cell morphology and intracellular alterations. The peptides affected the expression of fungal DNA replication and repair, cell wall synthesis and ergosterol synthesis genes. They increased cellular reactive oxygen species production and bound with fungal genomic DNA. Antibiofilm activities were observed when peptide alone or combined with AMB. Finally, these peptides protected 70% of Galleria mellonella from infection-caused death. Insects treated with peptides exhibited fewer infection foci compared with the untreatment. These results demonstrate the therapeutic potential of the peptides, particularly P256 with clear amphipathicity, in the development of therapies for C. albicans infections.
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Affiliation(s)
- Kang Ding
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Panpan Shen
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China.
| | - Lifang Wang
- School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Xiangli Dang
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
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