Controlled Release of Poly(U) via Acetalated Dextran Microparticles for Enhanced Vaccine Adjuvant Delivery.

ABSTRACT: Diverse drug delivery systems are needed to address challenges in delivering novel vaccine components and enhancing their efficacy. Poly(U) is a single-stranded RNA composed of uracil repeats that acts as a toll-like receptor (TLR) 7/8 agonist, stimulating the innate immune system. However, poly(U) is susceptible to ribonuclease degradation without a delivery carrier, and its negative charge hinders cellular uptake. Encapsulation in acetalated dextran (Ace-DEX), a pH-sensitive, biodegradable polymer, addresses these challenges. This study encapsulated poly(U) into Ace-DEX Microparticles (MPs) with either spherical (smooth MPs) or collapsed-surface (wrinkled MPs) via spray-drying. It was hypothesized that the different morphologies of MPs would influence the vaccine efficacy after in vitro

SUBMITTER: Ly SA 

PROVIDER: S-EPMC12330755 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature