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The Different Cellular Entry Routes for Drug Delivery Using Cell Penetrating Peptides.
Michael Okafor1,2, David Schmitt1,3, Stéphane Ory1
1Institut des Neurosciences Cellulaires et Intégratives-CNRS UPR3212, Université de Strasbourg, Strasbourg, France.
Biology of the Cell
|June 10, 2025
Summary
Cell-penetrating peptides (CPPs) provide a non-invasive method for delivering therapeutic molecules across cell membranes. These peptides offer a safer alternative to viral vectors for applications in gene therapy and drug delivery.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- The cell plasma membrane is a critical barrier for therapeutic delivery.
- Conventional delivery methods like viral vectors have limitations including cytotoxicity and genomic integration risks.
- Cell-penetrating peptides (CPPs) emerge as a promising non-invasive delivery strategy.
Purpose of the Study:
- To review the classification, mechanisms of action, and therapeutic potential of CPPs.
- To highlight the role of CPPs in intracellular vesicular trafficking.
- To emphasize CPPs as transformative tools for cellular therapies and medical treatments.
Main Methods:
- Review of existing literature on CPPs.
- Analysis of CPP classification based on sequence and interaction properties.
- Exploration of CPPs' membrane penetration mechanisms (direct penetration, endocytosis).
Main Results:
- CPPs are short peptides (5-30 amino acids) rich in basic or non-polar residues.
- CPPs interact favorably with cell membranes and can form complexes with various cargoes.
- CPPs exhibit diverse therapeutic applications, including drug delivery, gene therapy, and cancer treatment, offering advantages over viral vectors.
Conclusions:
- CPPs represent a significant advancement in overcoming cellular barriers for molecular delivery.
- Further research into CPP uptake mechanisms can enhance their specificity and efficacy.
- CPPs hold transformative potential for developing safer and more effective cellular therapies and medical treatments.
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