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Updated: Jul 3, 2026
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Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
Published on: September 19, 2022
Are cationic antimicrobial peptides also 'double-edged swords'?
1Institute for Dental Sciences, Faculty of Dental Medicine, The Hebrew University-Hadassah Medical Center, PO Box 12065, Jerusalem 91120, Israel. ginsburg@cc.huji.ac.il
Expert Review of Anti-Infective Therapy
|July 30, 2008
Summary
Cationic antimicrobial peptides (CAMPs) may kill bacteria by membrane permeabilization or by activating cell wall lysis, similar to beta-lactam antibiotics. Careful use of CAMPs is advised due to potential host cell injury alongside bacterial effects.
Area of Science:
- Microbiology
- Biochemistry
- Pharmacology
Background:
- Cationic antimicrobial peptides (CAMPs) are crucial in innate immunity and show promise as alternatives to conventional antibiotics.
- Emerging antibiotic resistance necessitates novel therapeutic strategies against bacterial infections.
- Bacterial cell wall lysis, releasing inflammatory components, can cause severe post-infectious complications.
Purpose of the Study:
- To explore the potential dual mechanism of CAMPs: direct membrane permeabilization and indirect activation of autolytic enzymes leading to bacteriolysis.
- To investigate the implications of CAMP-induced bacteriolysis for potential therapeutic applications and associated risks.
Main Methods:
- This review synthesizes current research on CAMP mechanisms of action.
- It analyzes the parallels between CAMPs and beta-lactam antibiotics regarding bacterial lysis.
- It discusses the in vivo consequences of massive microbial cell wall component release.
Main Results:
- CAMPs may induce bacterial cell death not only by membrane disruption but also by triggering autolytic wall enzymes, causing bacteriolysis.
- This lysis mechanism resembles that of beta-lactam antibiotics, suggesting a conserved pathway for bacterial elimination.
- The uncontrolled release of bacterial components during lysis can exacerbate host inflammatory responses.
Conclusions:
- CAMPs represent a potential alternative to antibiotics, particularly against resistant strains.
- Their ability to induce bacteriolysis warrants further investigation for therapeutic development.
- CAMPs should be used cautiously due to their potential to harm host tissues, acting as a 'double-edged sword'.
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