Effects of tremella-alginate-liposome encapsulation on oral delivery of inactivated H5N3 vaccine

J Microencapsul. 2011;28(1):55-61. doi: 10.3109/02652048.2010.523796. Epub 2010 Oct 14.

Abstract

In this study, we evaluated a system for oral vaccine delivery, consisting of liposomes coated first with a layer of tremella and then with an outer layer of acid-induced alginate. In vitro release studies showed that the triple layer of alginate-tremella-liposomes was more resistant to an acidic pH and modulated the release profiles at an alkaline pH. Transepithelial electrical resistance (TEER) studies revealed that liposomes or tremella-coated liposomes were able to open tight junctions of the Caco-2 cell monolayer. In mice, although serum immunoglobulin G (IgG) was not expected to increase and haemagglutination inhibition showed that antibody levels were still too low to provide sufficient protection, alginate-tremella-liposomes encapsulated virus-induced intestinal secretory immunoglobulin A (s-IgA) production to provide protection against virus infection. In conclusion, an oral virus vaccine entrapped in alginate-tremella-liposomes improved the mucosal antiviral s-IgA response. This system may have potential use as a carrier for oral vaccine delivery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Oral
  • Alginates / chemistry*
  • Animals
  • Antibody Formation
  • Antigens, Viral / administration & dosage
  • Antigens, Viral / immunology
  • Caco-2 Cells
  • Female
  • Glucuronic Acid / chemistry
  • Hemagglutination Inhibition Tests
  • Hexuronic Acids / chemistry
  • Humans
  • Immunoglobulin A, Secretory / immunology
  • Immunoglobulin G / blood
  • Influenza A virus / immunology*
  • Influenza Vaccines / administration & dosage*
  • Influenza Vaccines / immunology
  • Liposomes / chemistry*
  • Mice
  • Mice, Inbred BALB C
  • Orthomyxoviridae Infections / prevention & control*
  • Vaccines, Inactivated / administration & dosage
  • Vaccines, Inactivated / immunology

Substances

  • Alginates
  • Antigens, Viral
  • Hexuronic Acids
  • Immunoglobulin A, Secretory
  • Immunoglobulin G
  • Influenza Vaccines
  • Liposomes
  • Vaccines, Inactivated
  • Glucuronic Acid