1. High Therapeutic Index α-Helical AMPs and Their Therapeutic Potential on Bacterial Lung and Skin Wound Infections.
- Author
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Ouyang X, Li B, Yang T, Yang Y, Ba Z, Zhang J, Yang P, Liu Y, Wang Y, Zhao Y, Mao W, Wu X, Zeng X, Zhong C, Liu H, Zhang Y, Gou S, and Ni J
- Subjects
- Animals, Mice, Pneumonia, Bacterial drug therapy, Pneumonia, Bacterial microbiology, Klebsiella Infections drug therapy, Klebsiella Infections microbiology, Female, Disease Models, Animal, Humans, Skin Diseases, Bacterial drug therapy, Skin Diseases, Bacterial microbiology, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents therapeutic use, Methicillin-Resistant Staphylococcus aureus drug effects, Wound Infection drug therapy, Wound Infection microbiology, Klebsiella pneumoniae drug effects, Antimicrobial Peptides pharmacology, Antimicrobial Peptides chemistry, Antimicrobial Peptides therapeutic use, Microbial Sensitivity Tests
- Abstract
Antimicrobial peptides (AMPs) possess strong antibacterial activity and low drug resistance, making them ideal candidates for bactericidal drugs for addressing the issue of traditional antibiotic resistance. In this study, a template (G(XXKK)
n I, G = Gly; X = Leu, Ile, Phe, or Trp; n = 2, 3, or 4; K = Lys; I = Ile.) was employed for the devised of a variety of novel α-helical AMPs with a high therapeutic index. The AMP with the highest therapeutic index, WK2 , was ultimately chosen following a thorough screening process. It demonstrates broad-spectrum and potent activity against both standard and multidrug-resistant bacteria, while also showing low hemolysis and rapid and efficient time-kill kinetics. Additionally, WK2 exhibits excellent efficacy in treating mouse models of Klebsiella pneumonia -induced lung infections and methicillin-resistant Staphylococcus aureus (MRSA)-induced skin wound infections while demonstrating good safety profiles in vivo . In conclusion, the template-based design methodology for novel AMPs with high therapeutic indices offers new insights into addressing antibiotic resistance problems. WK2 represents a promising antimicrobial agent.- Published
- 2024
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