ArticleInternational journal of pharmaceutics2025
Immunostimulatory Pickering emulsion for oral vaccine delivery.
Article in International journal of pharmaceutics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Pickering emulsion as an oral delivery platform of anti-TNF-α antibody for ulcerative colitis therapy.International journal of pharmaceutics · 2026Article
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7 authors.
Funding
Abstract
To overcome gastric acid degradation and ensure robust immune activation, a novel Pickering emulsion stabilized by poly(lactic-co-glycolic acid) (PLGA) nanoparticles was developed for the co-delivery of vaccine antigens and adjuvants via the oral route. Pickering emulsions, stabilized by solid particles, can enhance stability and protect antigens from gastric degradation. We encapsulated a TLR7/8 agonist R848 in PLGA nanoparticles and fabricated Pickering emulsions (R848-PLGA-NP@PE) to boost immune activation, and further prepared model antigen Ovalbumin (OVA) loaded Pickering emulsion formulation (R848-PLGA-NP@PE-OVA) to induce antigen-specific immune responses. R848-PLGA-NPs can improve vaccine efficacy by serving both as a stabilizer and an adjuvant, activating antigen-presenting cells (APCs). R848-PLGA-NP@PE-OVA exhibited a uniform particle size (245 nm), stable zeta potential (-40 mV), and high antigen encapsulation efficiency (>80 %), that were tested in Simulated Intestinal Fluid (SIF) and Simulated Gastric Fluid (SGF). R848-PLGA-NP@PE exhibited enhanced uptake by and activation of dendritic cells compared to control groups. In vivo, R848-PLGA-NP@PE significantly improved CD4 + T cell, CD8 + T cell, and NK cell activation. Notably, granzyme B expression in NK cells reached 2.1 times the level of the PBS group and 1.45 times that of the Free OVA + R848 group. The OVA-specific IgG level in the R848-PLGA-NP@PE-OVA group was approximately 3.9 times that of the PBS group and 2.5 times that of the free R848 + OVA group. Fecal OVA-specific IgA levels were significantly higher than control group. The combined data suggests that Pickering emulsions fabricated with PLGA-NPs are versatile oral vaccine delivery platforms to induce cellular and humoral immune responses.
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