Oral MucoRice expressing double-mutant cholera toxin A and B subunits induces toxin-specific neutralising immunity

Academic Article


  • Rice-expressed cholera toxin B (CTB) subunit is a cold-chain-free oral vaccine that effectively induces enterotoxin-neutralising immunity. We created another rice-based vaccine, MucoRice, expressing nontoxic double-mutant cholera toxin (dmCT) with CTA and CTB subunits. Western-blot analysis suggested that MucoRice-dmCT had the shape of a multicomponent vaccine. Oral administration of MucoRice-dmCT induced CTB- but not CTA-specific serum IgG and mucosal IgA antibodies, generating protective immunity against cholera toxin without inducing rice-protein-specific antibody responses. The potency of MucoRice-dmCT was equal to that of MucoRice-CTB vaccine. MucoRice has the potential to be used as a safe multicomponent vaccine expression system. © 2009 Elsevier Ltd. All rights reserved.
  • Published In

  • Vaccine  Journal
  • Digital Object Identifier (doi)

    Author List

  • Yuki Y; Tokuhara D; Nochi T; Yasuda H; Mejima M; Kurokawa S; Takahashi Y; Kataoka N; Nakanishi U; Hagiwara Y
  • Start Page

  • 5982
  • End Page

  • 5988
  • Volume

  • 27
  • Issue

  • 43