Relationship between the strength of antigen adsorption to an aluminum-containing adjuvant and the immune response

Bethany Hansen, Anna Sokolovska, Harm HogenEsch, Stanley L. Hem

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

Adsorption of the antigen to an aluminum-containing adjuvant is considered an important aspect of vaccine formulation. Adsorption is described by two parameters: the maximum amount that can be adsorbed as a monolayer, which is characterized by the adsorptive capacity and the strength of the adsorption force, which is described by the adsorptive coefficient. Research to date has focused on the adsorptive capacity with the goal of complete adsorption of the antigen. In this study, the relationship between the adsorptive coefficient and immunopotentiation was investigated. Four vaccines were prepared in which the adsorptive coefficient was varied by altering the number of phosphate groups on the antigen (alpha casein and dephosphorylated alpha casein) or the number of surface hydroxyls on the adjuvant (aluminum hydroxide adjuvant and phosphate-treated aluminum hydroxide adjuvant). In vitro elution upon exposure to interstitial fluid or normal human plasma was inversely related to the adsorptive coefficient. The geometric mean antibody titer in mice was also inversely related to the adsorptive coefficient. T-cell activation was not observed in mice that received the vaccine with the greatest adsorptive coefficient (alpha casein/aluminum hydroxide adjuvant). This suggests that antigen processing and presentation to T-cells is impaired when the antigen is adsorbed too strongly.

Original languageEnglish (US)
Pages (from-to)6618-6624
Number of pages7
JournalVaccine
Volume25
Issue number36
DOIs
StatePublished - Sep 4 2007
Externally publishedYes

Keywords

  • Adsorptive coefficient
  • Aluminum hydroxide adjuvant
  • Antigen adsorption
  • Elution
  • Ligand exchange
  • Strength of adsorption
  • T-cell activation

ASJC Scopus subject areas

  • Molecular Medicine
  • Immunology and Microbiology(all)
  • veterinary(all)
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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