8p4 Phe-PEA

8p4 Phe-PEA is an experimental hybrid polymeric nanoparticle delivery system designed for the inhalation-based delivery of messenger RNA (mRNA). Developed primarily at Johns Hopkins University, this platform consists of a blend of two distinct polymers: a poly(beta-amino ester) (PBAE) designated as 8p4 and a phenylalanine-based poly(ester amide) (Phe-PEA). The 8p4 component is engineered for high transfection efficiency and cellular uptake, while the Phe-PEA component provides structural stability and enhances the ability of the nanoparticles to penetrate the dense, viscous mucus layer characteristic of pulmonary diseases like cystic fibrosis. By encapsulating mRNA, the system protects the genetic material from degradation and facilitates its transport into airway epithelial cells. Once internalized via endocytosis, the polymers promote endosomal escape, allowing the mRNA to be translated into functional proteins. The primary therapeutic application investigated for this technology is the delivery of CFTR mRNA to restore chloride channel function in patients with cystic fibrosis.

Other names

PBAE/PEA blend8p4-Phe-PEA nanoparticle