Stapled Versions of a Frog-Derived Antimicrobial Peptide Show Enhanced Anti-Cancer Activity
Hydrocarbon stapling of the amphibian-derived antimicrobial peptide A4K14-citropin 1.1 improves its structural stability and enhances antitumor activity.
Quick Facts
What This Study Found
Hydrocarbon stapling of A4K14-citropin 1.1 improved structural stability and enhanced antitumor activity compared to the linear parent peptide.
Key Numbers
Sp1 and Sp4 leads; improved helicity; greater protease stability; increased antitumor activity vs parent
How They Did This
All-hydrocarbon stapled peptide synthesis, circular dichroism for structural analysis, antitumor activity assays against cancer cell lines.
Why This Research Matters
Many antimicrobial peptides have anticancer potential but are too flexible and unstable for therapeutic use. Stapling solves these problems while potentially improving activity.
The Bigger Picture
This demonstrates that stapling technology can be applied to natural antimicrobial peptides to create more drug-like anticancer candidates.
What This Study Doesn't Tell Us
In vitro study only. Selectivity between cancer cells and normal cells not thoroughly assessed. No in vivo data.
Questions This Raises
- ?Do stapled citropin variants show selectivity for cancer over normal cells?
- ?Can stapling improve in vivo stability enough for systemic administration?
- ?What is the mechanism of cancer cell killing?
Trust & Context
- Key Stat:
- Enhanced activity Stapled versions of amphibian AMP A4K14-citropin 1.1 showed improved antitumor activity over the linear peptide
- Evidence Grade:
- In vitro proof-of-concept for stapled AMP anticancer application. Early discovery stage.
- Study Age:
- Published in 2020.
- Original Title:
- Design, Synthesis, and Antitumor Activities Study of Stapled A4K14-Citropin 1.1 Peptides.
- Published In:
- Frontiers in chemistry, 8, 616147 (2020)
- Authors:
- Wang, Nan, Xie, Gang, Liu, Chao, Cong, Wei, He, Shipeng, Li, Yinghua, Fan, Li, Hu, Hong-Gang
- Database ID:
- RPEP-05191
Evidence Hierarchy
Frequently Asked Questions
What is A4K14-citropin 1.1?
It's an optimized version of citropin, a peptide found in Australian frog skin secretions. It has broad antimicrobial and anticancer activity, but its flexible structure limits its use as a drug.
How does stapling help make it a better drug?
Stapling adds a hydrocarbon bridge that locks the peptide into its active helical shape. This makes it more resistant to degradation, more cell-permeable, and in this case, more potent against cancer cells.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-05191APA
Wang, Nan; Xie, Gang; Liu, Chao; Cong, Wei; He, Shipeng; Li, Yinghua; Fan, Li; Hu, Hong-Gang. (2020). Design, Synthesis, and Antitumor Activities Study of Stapled A4K14-Citropin 1.1 Peptides.. Frontiers in chemistry, 8, 616147. https://doi.org/10.3389/fchem.2020.616147
MLA
Wang, Nan, et al. "Design, Synthesis, and Antitumor Activities Study of Stapled A4K14-Citropin 1.1 Peptides.." Frontiers in chemistry, 2020. https://doi.org/10.3389/fchem.2020.616147
RethinkPeptides
RethinkPeptides Research Database. "Design, Synthesis, and Antitumor Activities Study of Stapled..." RPEP-05191. Retrieved from https://rethinkpeptides.com/research/wang-2020-design-synthesis-and-antitumor
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Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.