Storage Stability
Mechanism of Action
HDM2 Surface Targeting
Many cancer cell types express HDM2 on their external plasma membrane surface, an aberrant localization not seen in normal cells. PNC-27's p53 domain binds this surface HDM2, concentrating the peptide on cancer cells.Membrane Pore Formation
The transmembrane penetratin sequence in PNC-27 then inserts into the lipid bilayer, oligomerizes, and forms pores. These pores disrupt membrane integrity, causing rapid necrotic/apoptotic cell death.Selectivity
The selectivity for cancer cells depends on surface HDM2 expression. Cell lines with high surface HDM2 (pancreatic, breast, melanoma) show high sensitivity; normal cell lines are largely spared.Research Summary
In Vitro Data
PNC-27 kills numerous cancer cell lines including pancreatic (MiaPaCa-2), breast, leukemia, and melanoma lines within hours of treatment at low micromolar concentrations. Normal cell lines show minimal toxicity.Pancreatic Cancer Focus
Pancreatic cancer is notoriously resistant to chemotherapy. PNC-27 has shown particular promise in this indication where surface HDM2 expression is consistently high.Animal Models
Limited but encouraging xenograft data shows tumor growth inhibition with PNC-27 treatment in mouse models without significant systemic toxicity.Research Protocols
Note: PNC-27 is in early preclinical research. No human dosing data exists.
Cell Culture
In vitro research typically uses 10-100 µM concentrations. Cell viability measured at 24-72 hours.Animal Models
Intraperitoneal or intratumoral injection in xenograft models. Dose varies by model (see published protocols).Storage & Handling
Store at -20°C. Reconstitute with DMSO (for cell culture stocks) or sterile saline (animal models). DMSO stock: -80°C long-term. Aqueous solutions: use within 24-48 hours at 4°C.
References
- [1]Bowne WB, et al. "Anticancer activity of the p53 peptidomimetic PNC-27 against pancreatic cancer." Cancer Res, 2008.
- [2]Ambrosone A, et al. "PNC-27, a selective apoptosis-inducing peptide in cancer cells." Anticancer Res, 2018.
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