Engineering a Nanoscale Al-MOF-Armored Antigen Carried by a “Trojan Horse”-Like Platform for Oral Vaccination to Induce Potent and Long-Lasting Immunity

Yang Bao Miao, Wen Yu Pan, Kuan Hung Chen, Hao Ji Wei, Fwu Long Mi, Ming Yen Lu, Yen Chang, Hsing Wen Sung

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Vaccination via the oral administration of an antigen faces many challenges, including gastrointestinal (GI) proteolysis and mucosal barriers. To limit GI proteolysis, a biomimetically mineralized aluminum-based metal–organic framework (Al-MOF) system that is resistant to ambient temperature and pH and can act synergistically as a delivery vehicle and an adjuvant is synthesized over a model antigen ovalbumin (OVA) to act as armor. To overcome mucosal barriers, a yeast-derived capsule is used to carry the Al-MOF-armored OVA as a “Trojan Horse”-like transport platform. In vitro experiments reveal that the mineralization of Al-MOFs forms an armor on OVA that protects against highly acidic and degradative GI conditions. However, the mineralized Al-MOFs can gradually disintegrate in a phosphate ion-containing simulated intracellular fluid, slowly releasing their encapsulated OVA. In vivo studies reveal that the “Trojan Horse”-like transport platform specifically targets intestinal M cells, favoring the transepithelial transport of the Al-MOF-armored OVA, followed by subsequent endocytosis in local macrophages, ultimately accumulating in mesenteric lymph nodes, yielding long-lasting, high-levels of mucosal S-IgA and serum IgG antibodies. Such an engineered delivery platform may represent a promising strategy for the oral administration of prophylactic or therapeutic antigens for vaccination.

Original languageEnglish
Article number1904828
JournalAdvanced Functional Materials
Volume29
Issue number43
DOIs
Publication statusPublished - Oct 1 2019

Keywords

  • aluminum adjuvant
  • biomimetic mineralization
  • drug delivery
  • metal–organic framework
  • yeast capsule

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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