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He Y, Shen Y, Feng X, Ruan S, Zhao Y, Mu L, Wu J, Yang H. Tree Frog-Derived Cathelicidin Protects Mice against Bacterial Infection through Its Antimicrobial and Anti-Inflammatory Activities and Regulatory Effect on Phagocytes. ACS Infect Dis 2023; 9:2252-2268. [PMID: 37855266 DOI: 10.1021/acsinfecdis.3c00316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Due to excessive use or abuse in the food industry, agriculture, and medicine, many pathogens are developing resistance against conventional antibiotics. Antimicrobial peptides (AMPs) hold promise as effective therapeutic options for the treatment of bacterial infections. Herein, a novel cathelicidin antimicrobial peptide (Zs-CATH) was identified from the tree frog Zhangixalus smaragdinus. Zs-CATH mainly adopted an amphipathic β-sheet structure in a membrane-mimetic environment. It showed broad-spectrum antibacterial activity against Gram-positive and Gram-negative bacteria in vitro and significantly protected mice from lethal infections induced by Gram-negative bacteria Escherichia coli ATCC 25922 or Gram-positive bacteria Staphylococcus aureus ATCC 25923 in vivo. In addition, Zs-CATH exerted a strong anti-inflammatory effect by neutralizing lipopolysaccharide (LPS) and lipoteichoic acid (LTA) and promoting macrophage M2 polarization, thus inhibiting the secretion of proinflammatory cytokines (TNF-α, IL-6, and IL-1β) and enhancing the production of M2 macrophage markers IL-10, IL-4, and CD206. The MAPK and NF-κB inflammatory signaling pathways and transcriptional activator 6 (STAT6) were involved in this effect. In mice, Zs-CATH rapidly recruited neutrophils and monocytes/macrophages to the abdominal cavity but not T and B lymphocytes. Zs-CATH did not exhibit a direct chemoattractant effect on phagocytes but significantly promoted phagocyte migration in the presence of macrophages. Zs-CATH stimulated macrophages to secrete chemokines CXCL1, CXCL2, and CCL2, which mediated the recruitment of phagocytes. Furthermore, Zs-CATH promoted the production of reactive oxygen species (ROS) and neutrophil extracellular traps (NETs), which are oxygen-dependent and oxygen-independent mechanisms of the microbicidal activity of neutrophils, respectively. Zs-CATH exhibited no toxic side effects on mammalian cells and mice. These findings show that in addition to direct antibacterial activity, Zs-CATH also possesses the ability to modulate immune and inflammatory processes during bacterial infection, showing potential for development as anti-infective and/or anti-inflammatory agents.
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Affiliation(s)
- Yanmei He
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Yan Shen
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Xiaoli Feng
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Shimei Ruan
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Yingying Zhao
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Lixian Mu
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Jing Wu
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Hailong Yang
- School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, Yunnan, China
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Pérez-Guillén I, Domènech Ò, Botet-Carreras A, Merlos A, Sierra JM, Albericio F, de la Torre BG, Montero MT, Viñas M, Borrell JH. Studying Lipid Membrane Interactions of a Super-Cationic Peptide in Model Membranes and Living Bacteria. Pharmaceutics 2022; 14:pharmaceutics14102191. [PMID: 36297628 PMCID: PMC9611851 DOI: 10.3390/pharmaceutics14102191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/04/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
The super-cationic peptide dendrimers (SCPD) family is a valuable class of antimicrobial peptide candidates for the future development of antibacterial agents against multidrug-resistant gram-negative bacteria. The deep knowledge of their mechanism of action is a major challenge in research, since it may be the basis for future modifications/optimizations. In this work we have explored the interaction between SCPD and membranes through biophysical and microbiological approaches in the case of the G1OLO-L2OL2 peptide. Results support the idea that the peptide is not only adsorbed or close to the surface of the membrane but associated/absorbed to some extent to the hydrophobic-hydrophilic region of the phospholipids. The presence of low concentrations of the peptide at the surface level is concomitant with destabilization of the cell integrity and this may contribute to osmotic stress, although other mechanisms of action cannot be ruled out.
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Affiliation(s)
- Isabel Pérez-Guillén
- Laboratory of Molecular Microbiology & Antimicrobials, Faculty of Medicine & Health Sciences, University of Barcelona, 08907 Barcelona, Spain
- Physical Chemistry Section, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
| | - Òscar Domènech
- Physical Chemistry Section, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
- Correspondence: (Ò.D.); (J.M.S.)
| | - Adrià Botet-Carreras
- Physical Chemistry Section, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
| | - Alexandra Merlos
- Laboratory of Molecular Microbiology & Antimicrobials, Faculty of Medicine & Health Sciences, University of Barcelona, 08907 Barcelona, Spain
| | - Josep M. Sierra
- Laboratory of Molecular Microbiology & Antimicrobials, Faculty of Medicine & Health Sciences, University of Barcelona, 08907 Barcelona, Spain
- Correspondence: (Ò.D.); (J.M.S.)
| | - Fernando Albericio
- Peptide Sciences Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, University Road, Westville, Durban 4001, South Africa
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
| | - Beatriz G. de la Torre
- KRISP, College of Health Sciences, University of KwaZulu-Natal, Westville, Durban 4001, South Africa
| | - M. Teresa Montero
- Physical Chemistry Section, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
| | - Miguel Viñas
- Laboratory of Molecular Microbiology & Antimicrobials, Faculty of Medicine & Health Sciences, University of Barcelona, 08907 Barcelona, Spain
| | - Jordi H. Borrell
- Physical Chemistry Section, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
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Mabrouk DM. Antimicrobial peptides: features, applications and the potential use against covid-19. Mol Biol Rep 2022; 49:10039-10050. [PMID: 35606604 PMCID: PMC9126628 DOI: 10.1007/s11033-022-07572-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 05/05/2022] [Indexed: 12/04/2022]
Abstract
BACKGROUND Antimicrobial peptides (AMPs) are a diverse class of molecules that represent a vital part of innate immunity. AMPs are evolutionarily conserved molecules that exhibit structural and functional diversity. They provide a possible solution to the antibiotic-resistance crisis. MAIN TEXT These small cationic peptides can target bacteria, fungi, and viruses, as well as cancer cells. Their unique action mechanisms, rare antibiotic-resistant variants, broad-spectrum activity, low toxicity, and high specificity encourage pharmaceutical industries to conduct clinical trials to develop them as therapeutic drugs. The rapid development of computer-assisted strategies accelerated the identification of AMPs. The Antimicrobial Peptide Database (APD) so far contains 3324 AMPs from different sources. In addition to their applications in different fields, some AMPs demonstrated the potential to combat COVID-19, and hinder viral infectivity in diverse ways. CONCLUSIONS This review provides a brief history of AMPs and their features, including classification, evolution, sources and mechanisms of action, biosynthesis pathway, and identification techniques. Furthermore, their different applications, challenges to clinical applications, and their potential use against COVID-19 are presented.
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Affiliation(s)
- Dalia Mamdouh Mabrouk
- Cell Biology Department, National Research Centre, 33 El Bohouth, St., P.O.12622, Dokki, Giza, Egypt.
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Use of antibiotics after lower third molar surgery - useful or harmful procedure? A randomized, double-blind, placebo-controlled trial. SRP ARK CELOK LEK 2022. [DOI: 10.2298/sarh220124049s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Introduction/Objective. The aim of the present study was to investigate the
effects of moxifloxacin and cefixime in preventing postoperative infection
following mandibular third molar surgery. Methods. Double-blind study was
completed by 157 patients undergoing surgical removal of mandibular third
molars. Patients were randomly assigned to three groups: moxifloxacin (M),
cefixime (C) and placebo (P). Patients in each group were classified into
two subgroups: subgroup (a) without previous history of pericoronitis and
subgroup (b) with previous history of pericoronitis. All patients were
evaluated at the postoperative follow-ups on the first, second and seventh
postoperative day. Results. Postoperative infections were registered only
in patients with history of pericoronitis. Antibiotic prophylaxis with
cefixime, and moxifloxacin, reduced the occurrence of postoperative
infection. Overall incidence of postoperative infections was 6.4%. All
postoperative infections were registered in placebo-group, where the
incidence of postoperative infection was 19.2%. Microbiological tests
verified the clinically obtained results. Isolated microflora was resistant
to penicillin-derived antibiotics in 50% of cases. Conclusion. Prophylactic
use of antibiotics after third molar surgery should be weighted against
potential risks and benefits and could be considered in cases with previous
history of pericoronitis, when complicated surgical extraction is performed.
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