A computationally optimized cell-penetrating peptide (589WP) significantly improved transdermal delivery and inhibited melanoma growth when conjugated to the anti-cancer drug floxuridine.
Beat higher-dose free drugPeptide-drug conjugate gel inhibited melanoma more effectively than higher doses of unconjugated drug
What the researchers found
Computationally redesigned penetratin derivative (589WP) significantly improved transdermal delivery and, when conjugated to floxuridine in a topical gel, outperformed higher doses of free drug in melanoma inhibition without skin toxicity.
Why it matters
Topical cancer treatment could avoid the systemic side effects of intravenous chemotherapy. This computationally designed peptide delivery system demonstrates the feasibility of skin-penetrating peptide-drug conjugates.
How the study worked
CPP screening, computational simulation to identify permeability determinants, peptide redesign, in vitro skin permeability studies, in vivo fluorescence imaging, peptide-drug conjugation via ester linkage, and topical melanoma treatment model.
What this study cannot tell us
Melanoma mouse model only. Ester linkage may limit conjugate stability. Manufacturing scalability of peptide-drug conjugates needs assessment. Skin penetration depth may be insufficient for deep tumors.
How to read the evidence
Preclinical study with computational design, in vitro/in vivo validation, and efficacy in tumor model. Novel platform needing clinical development.
When this study was published
Published in 2025.
The bigger picture
This computational prediction and design approach for skin-penetrating peptides could be applied broadly to improve transdermal delivery of many drugs beyond cancer therapy.
Questions still open
- Could this peptide delivery approach work for drugs treating other skin conditions?
- How does 589WP penetration depth compare across different skin types?
- Can the computational prediction model be applied to design peptides for mucosal delivery?
Common questions
How does a peptide help deliver drugs through skin?
Could this replace injections for skin cancer treatment?
Read the original research
Skin-penetrating peptides derived from computational simulation improve transdermal absorption and facilitate topical treatment of melanoma.
Acta pharmaceutica Sinica. B, 16(2), 1140-1154
Citation
Du, Sanjiang; Wang, Hanlin; Geng, Feiyang; Zhang, Zongxu; Liu, Chenghao; Lu, Weiyue; Wei, Gang. (2026). Skin-penetrating peptides derived from computational simulation improve transdermal absorption and facilitate topical treatment of melanoma.. Acta pharmaceutica Sinica. B, 16(2), 1140-1154. https://doi.org/10.1016/j.apsb.2025.12.026