Cell-penetrating foldamers — synthetic oligomers with organized secondary structures — are being developed as drug delivery carriers with enhanced cell membrane permeability.
Foldamerssynthetic oligomers with organized secondary structures designed for enhanced cell penetration
What the researchers found
Cell-penetrating foldamers containing various non-natural building blocks can achieve organized secondary structures that enhance cell membrane permeability, functioning as potential drug delivery system (DDS) carriers.
Why it matters
Natural cell-penetrating peptides face stability and specificity challenges. Foldamers — being synthetic and designable — could overcome these limitations while maintaining or exceeding the cell-penetrating ability of natural CPPs.
The numbers in context
Multiple foldamer designs; optimal secondary structure and cationic content achieved efficient cell penetration.
How the study worked
Account/mini-review describing recent advances in designing cell-penetrating foldamers with various building blocks and their applications as drug delivery carriers.
Who was studied
Synthetic foldamer library tested in cell culture
What this study cannot tell us
Account/overview format with limited original data. Many foldamers discussed are at early proof-of-concept stage. In vivo performance, toxicity, and pharmacokinetics of most foldamers remain to be established.
How to read the evidence
Account summarizing design principles and early results. Conceptual framework is well-established but clinical applications remain distant.
When this study was published
Published in 2020. Foldamer design for drug delivery continues as an active area of peptidomimetic research.
The bigger picture
Drug delivery is a major bottleneck in medicine — many effective drugs can't reach their intracellular targets. Foldamers represent a designable, tunable platform for overcoming this barrier, bridging the gap between small molecule drugs and biological therapeutics.
Questions still open
- Which foldamer building blocks provide the best balance of cell penetration and biocompatibility?
- Can foldamers achieve tissue-specific delivery in vivo?
- How do foldamers compare to natural CPPs in terms of cargo delivery efficiency and safety?
Common questions
What is a foldamer?
Why not just use natural cell-penetrating peptides?
Read the original research
De Novo Design of Cell-Penetrating Foldamers.
Chemical record (New York, N.Y.), 20(9), 912-921
Citation
Yokoo, Hidetomo; Misawa, Takashi; Demizu, Yosuke. (2020). De Novo Design of Cell-Penetrating Foldamers.. Chemical record (New York, N.Y.), 20(9), 912-921. https://doi.org/10.1002/tcr.202000047