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Updated: Jun 2, 2026
10:35
Production and Testing of Antimicrobial Peptides and Their Mimics
Published on: April 10, 2026
A novel peptide mR63-77 from Rpl36 protein showing potent antibacterial activities
Longxiao Liu1, Xue Liu1, Mengqi Jiang1
1Institute of Advanced Biomedical Research, College of Biological Engineering, Qingdao University of Science and Technology, Qingdao, China.
International Journal of Antimicrobial Agents
|May 31, 2026
Summary
A novel antibacterial peptide, mR63-77, derived from zebrafish Rpl36, shows potent activity against drug-resistant bacteria by disrupting cell membranes. This peptide demonstrates stability, safety, and efficacy in preclinical models, offering a promising alternative to conventional antibiotics.
Area of Science:
- Microbiology
- Biochemistry
- Pharmacology
Background:
- Antibiotic resistance crisis poses a significant threat to global public health.
- Development of novel, safe, and effective antibiotic alternatives is urgently needed.
Purpose of the Study:
- To identify and characterize novel antibacterial agents from zebrafish.
- To evaluate the therapeutic potential of a candidate peptide, mR63-77, against drug-resistant bacteria.
Main Methods:
- Peptide screening from zebrafish Rpl36 protein sequence.
- In vitro antibacterial assays, including membrane disruption and hemolysis tests.
- In vivo efficacy studies in zebrafish and mouse models of Staphylococcus aureus infection.
Main Results:
- The peptide mR63-77 demonstrated potent broad-spectrum antibacterial activity and stability.
- mR63-77 effectively disrupted bacterial cell membranes.
- In vivo studies showed mR63-77 reduced inflammation, oxidative stress, and accelerated wound healing with no observed toxicity.
Conclusions:
- The zebrafish-derived peptide mR63-77 exhibits significant antibacterial properties, stability, and biosecurity.
- mR63-77 holds substantial translational potential for treating drug-resistant bacterial infections.
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