Article
Biotechnology & Applied Microbiology
Yan Huang, Na Yang, Da Teng, Ruoyu Mao, Ya Hao, Xuanxuan Ma, Lingyun Wei, Jianhua Wang
Summary: In this study, three-dimensional reticulated antimicrobial peptide hydrogels were developed for preventing and treating Staphylococcus aureus infections. The HPC-NZ2114 hydrogel exhibited sustained release, good cytocompatibility, and excellent antibacterial activity both in vitro and in vivo. It accelerated wound healing by reducing inflammation and promoting angiogenesis.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Pharmacology & Pharmacy
William Gustavo Lima, Julio Cesar Moreira de Brito, Valbert Nascimento Cardoso, Simone Odilia Antunes Fernandes
Summary: The study found that melittin, the main component of apitoxin, has potent antibacterial effects against MRSA skin infections without inducing resistance. It acts quickly and can reduce inflammation in vivo.
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Hosein Khabaz, Mehdi Rahimi-Nasrabadi, Amir Homayoun Keihan
Summary: In this study, a hierarchical machine learning model was developed to classify peptides with antimicrobial activity against Staphylococcus aureus. The final model showed high accuracy on the test set, utilizing a comprehensive set of features and feature selection steps.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2023)
Article
Microbiology
Aaron B. Benjamin, Madeleine G. Moule, Maruti K. Didwania, Jonathan Hardy, Panatda Saenkham-Huntsinger, Preeti Sule, Josefine Eilso Nielsen, Jennifer S. Lin, Christopher H. Contag, Annelise E. Barron, Jeffrey D. Cirillo
Summary: Staphylococcus aureus resistance is a major concern in healthcare, and antimicrobial peptoids show promise as an alternative to conventional antibiotics for treating S. aureus wound infections, with efficient killing of bacteria and prevention of biofilm formation and detachment.
MICROBIOLOGY SPECTRUM
(2022)
Article
Infectious Diseases
Jian Peng, Biswajit Mishra, Rajamohammed Khader, LewisOscar Felix, Eleftherios Mylonakis
Summary: In this study, a smaller antimicrobial peptide C18 derived from cecropin 4 showed high antibacterial activity against various bacteria and yeasts, with a remarkable effect on drug-resistant Staphylococcus aureus. C18 also exhibited the capability to eliminate persister cells, reduce biofilm adherence, interact with DNA, and down-regulate virulence factor genes. Moreover, C18 showed promising results in a Galleria mellonella model, highlighting its potential as a therapeutic candidate for severe MRSA infections.
Article
Infectious Diseases
Md Saruar Bhuiyan, Jhih-Hang Jiang, Xenia Kostoulias, Ravali Theegala, Graham J. Lieschke, Anton Y. Peleg
Summary: The study investigated host innate immune responses against clinically derived, daptomycin-resistant and -susceptible Staphylococcus aureus isolates using a zebrafish infection model. Results showed that control of daptomycin-resistant S. aureus infections in vivo was compromised due to cross-resistance to host cationic antimicrobial peptides, shedding light on persistent infections caused by this troublesome pathogen.
Review
Biochemistry & Molecular Biology
Isabella Hernandez-Aristizabal, Ivan Dario Ocampo-Ibanez
Summary: The emergence of bacteria resistant to conventional antibiotics, especially VRSA and VISA strains, poses a serious threat to global health. Developing new antimicrobial alternatives, such as antimicrobial peptides (AMPs), is urgently needed as a promising therapeutic strategy to combat resistant strains. Evaluating natural, artificial, and synthetic AMPs against VRSA and VISA strains shows great potential for clinical application.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Microbiology
Bingqian Yuan, Xiaoyu Lu, Min Yang, Qiyi He, Zhuocen Cha, Yaqun Fang, Yan Yang, Lei Xu, Jingting Yan, Ren Lai, Aili Wang, Xiaodong Yu, Zilei Duan
Summary: Staphylococcus aureus (S. aureus) is a common pathogenic bacterium with increasing drug resistance. The antimicrobial peptide GW18 shows excellent activity against various strains of S. aureus and significantly reduces infection in animal models.
FRONTIERS IN MICROBIOLOGY
(2022)
Review
Microbiology
Narchonai Ganesan, Biswajit Mishra, LewisOscar Felix, Eleftherios Mylonakis
Summary: Clinical management of Staphylococcus aureus infections is challenging due to high incidence, virulence, and drug resistance. The treatment of drug-resistant strains, such as MRSA, is further complicated by tolerance and persistence to antimicrobial agents. Membrane disruptors, such as antimicrobial peptides and small molecules, have the potential to overcome these challenges by targeting the bacterial membrane and secondary mechanisms.
MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS
(2023)
Article
Biochemistry & Molecular Biology
Nagasundarapandian Soundrarajan, Prathap Somasundaram, Dohun Kim, Hye-Sun Cho, Hyoim Jeon, Byeonyong Ahn, Mingue Kang, Hyuk Song, Chankyu Park
Summary: Antimicrobial peptides (AMPs), such as protegrin-1 (PG1), have shown potential as alternatives to current treatments for multidrug-resistant bacteria-infected wounds. This study evaluated the healing efficiency of PG1 in a Staphylococcus aureus-infected wound model using PG1-overexpressing transgenic mice. We observed the resolution of bacterial infection and neo-epithelium formation in the wounds of PG1 transgenic mice, even without antibiotic treatment. Additionally, in vitro experiments showed that PG1 enhanced cell migration in primary epidermal keratinocytes. These findings contribute to our understanding of the role of broad-spectrum endogenous antimicrobial peptides, like PG1, in wound healing, and suggest PG1 as a potential therapeutic candidate for wound healing.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Microbiology
Junho Cho, Stephen K. Costa, Rachel M. Wierzbicki, William F. C. Rigby, Ambrose L. Cheung
Summary: Staphylococcus aureus has developed survival strategies to respond to host defense proteins by utilizing a two-component system and an efflux pump, where the lysine-rich extracellular loop of VraG interferes with GraS sensing and signaling. This finding highlights an interesting facet of how efflux pumps disrupt host defense protein signaling in bacterial pathogens.
Article
Food Science & Technology
Shen Yang, Mingyao Wang, Jialong Gao, Jiaxin Liu, Ritian Jin, Rong Lin, Wuyin Weng, Jude Juventus Aweya
Summary: The activity of antimicrobial peptides (AMPs) can be enhanced by low concentration of sodium chloride (NaCl), which can increase the antibacterial effect against Staphylococcus aureus. The enhancement is achieved through the destruction of bacterial structure, transformation of peptide structure, and increased binding and permeability to bacterial membranes.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biology
Christoph J. Slavetinsky, Janna N. Hauser, Cordula Gekeler, Jessica Slavetinsky, Andre Geyer, Alexandra Kraus, Doris Heilingbrunner, Samuel Wagner, Michael Tesar, Bernhard Krismer, Sebastian Kuhn, Christoph M. Ernst, Andreas Peschel
Summary: The pandemic of antibiotic resistance is a major threat to human health, and new antimicrobial strategies are needed. Multiple peptide resistance factor (MprF) is a key factor that increases the resistance of methicillin-resistant Staphylococcus aureus (MRSA) and other pathogens to host defense peptides and antibiotics. In this study, monoclonal antibodies targeting MprF were developed, and an antibody called M-C7.1 was found to sensitize MRSA to antimicrobial peptides and antibiotics, as well as impair its survival in human phagocytes. These findings suggest that MprF inhibitors could be used as a new antivirulence approach against MRSA and other bacterial pathogens.
Article
Polymer Science
Jennifer Balcucho, Diana M. Narvaez, Natalia A. Tarazona, Jinneth Lorena Castro-Mayorga
Summary: Antimicrobial resistance is a major global health threat. In this study, bio-based silver and copper oxide nanoparticles were combined with a microbial-produced polyester to create bioactive films for the prevention and treatment of MRSA infections. These films showed strong antibacterial activity against MRSA and did not induce significant cytotoxicity or DNA damage in human fibroblast cells. These films also promoted platelet aggregation, which is beneficial for wound healing.
Article
Microbiology
Ziyu Yang, Bijun Qiu, Danhong Cheng, Na Zhao, Yao Liu, Min Li, Qian Liu
Summary: This study aims to understand the colonization mechanisms of Staphylococcus aureus in the nasal cavity of pediatric patients and healthy children. The results showed that virulent clones of S. aureus were prevalent in pediatric patients and exhibited higher resistance to antibiotics. These strains were able to evade the immune system through an antimicrobial peptide resistance mechanism.
INTERNATIONAL JOURNAL OF MEDICAL MICROBIOLOGY
(2022)