Stapled Peptides That Target Cancer Protein NONO Unexpectedly Enter Cells and Reach the Nucleus
Researchers designed stapled peptides targeting the cancer-linked protein NONO and discovered they naturally penetrate cells and localize to the nucleus — two properties that are extremely difficult to engineer.
Quick Facts
What This Study Found
Stapled peptides derived from IGFBP-3 and NONO dimerization sequences demonstrated unexpected cell permeability and preferential nuclear localization, despite only modest binding affinity to the NONO dimer.
Key Numbers
Stapled peptides achieved both cell penetration and nuclear localization — properties rarely seen together in designed peptides.
How They Did This
In vitro study using multiple peptide stapling chemistries (Pd-catalyzed cross-coupling, cysteine arylation, cysteine alkylation) to create macrocyclic helical peptides. Cell permeability and nuclear localization assessed via live confocal microscopy with dye-labeled peptides.
Why This Research Matters
Cell permeability and nuclear targeting are two of the biggest hurdles in peptide drug development. Finding peptides that achieve both naturally opens a new path for designing drugs against nuclear cancer targets like NONO.
The Bigger Picture
Most peptide drugs cannot enter cells, let alone reach the nucleus. This unexpected finding could accelerate the development of peptide-based cancer therapies targeting intracellular proteins, an area where traditional drug design has struggled.
What This Study Doesn't Tell Us
NONO binding was modest and could not be saturated. No functional anticancer activity demonstrated. Only tested in cell culture — no animal or clinical data. Nuclear localization mechanism not fully understood.
Questions This Raises
- ?What structural features of these stapled peptides enable their unexpected cell permeability and nuclear entry?
- ?Can binding affinity to NONO be improved through further peptide optimization?
- ?Will these peptides show anticancer activity in NONO-dependent cancer models?
Trust & Context
- Key Stat:
- Cell + nuclear entry Stapled peptides achieved both cell permeability and nuclear localization — properties rarely seen together in designed peptides
- Evidence Grade:
- Preliminary evidence: early-stage in vitro work demonstrating proof-of-concept for cell permeability and nuclear targeting, but no functional activity or in vivo data yet.
- Study Age:
- Published in 2024. Represents current state of stapled peptide technology.
- Original Title:
- Development of stapled NONO-associated peptides reveals unexpected cell permeability and nuclear localisation.
- Published In:
- Journal of peptide science : an official publication of the European Peptide Society, 30(5), e3562 (2024)
- Database ID:
- RPEP-09611
Evidence Hierarchy
Frequently Asked Questions
What are stapled peptides and why do they matter?
Stapled peptides are small protein fragments chemically reinforced with a molecular "staple" that locks them into a specific shape. This makes them more stable, more resistant to degradation, and sometimes better at entering cells than regular peptides.
Could this lead to a new cancer treatment?
It is very early, but the ability to get peptides into the nucleus is a major breakthrough step. If researchers can improve binding to the NONO cancer target, these peptides could become the basis for new cancer therapies.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-09611APA
Young, Reginald; Huang, Tiancheng; Luo, Zijie; Tan, Yaw Sing; Kaur, Amandeep; Lau, Yu Heng. (2024). Development of stapled NONO-associated peptides reveals unexpected cell permeability and nuclear localisation.. Journal of peptide science : an official publication of the European Peptide Society, 30(5), e3562. https://doi.org/10.1002/psc.3562
MLA
Young, Reginald, et al. "Development of stapled NONO-associated peptides reveals unexpected cell permeability and nuclear localisation.." Journal of peptide science : an official publication of the European Peptide Society, 2024. https://doi.org/10.1002/psc.3562
RethinkPeptides
RethinkPeptides Research Database. "Development of stapled NONO-associated peptides reveals unex..." RPEP-09611. Retrieved from https://rethinkpeptides.com/research/young-2024-development-of-stapled-nonoassociated
Access the Original Study
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.