Oral vaccination of mice with recombinant Schistosoma japonicum proteins induces specific anti-parasite antibodies and damage to adult worms after a challenge infection

Wen Yang*, Geoffrey N. Gobert, Donald P. McManus

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Mucosal immunisation by the oral route represents a cheap and simple method for delivering protective antigens to a host against gastrointestinal and respiratory pathogens. In the case of schistosome (bloodfluke) worms, 2 life-cycle stages may be exposed to the host's mucosa; the larval schistosomulum is exposed to the respiratory mucosa and, depending on the species, the egg may come into contact with the intestinal or urinogenital mucosa. Both IgA and some isotypes of IgG have been implicated in protective immunity against schistosomiasis in humans and in experimental animal models. We have used a novel approach to determine whether schistosome-specific antibodies and protective immunity could be generated in mice by oral administration of bacterial lysates containing recombinant Schistosoma japonicum proteins. The mice produced specific antibodies to paramyosin and GST26, 2 important vaccine candidates for schistosomiasis, but there was no significant reduction in worm burdens in groups of mice immunised with either protein. Significantly, however, transmission electron microscopy revealed damage to the teguments of adult female and male S. japonicum worms obtained from mice vaccinated with recombinant paramyosin; there was also extensive damage to the tegument of male worms recovered from mice vaccinated with recombinant GST26. Our observations that oral vaccination with bacterial lysates containing recombinant proteins induced particular classes and subclasses of circulating antibodies with resultant damage to the surface of adult worms may have important implications for the future development of oral vaccines against a systemic infection such as schistosomiasis.

Original languageEnglish
Pages (from-to)843-853
Number of pages11
JournalInternational Journal for Parasitology
Volume27
Issue number7
DOIs
Publication statusPublished - 01 Jul 1997
Externally publishedYes

Keywords

  • Antibodies
  • GST26
  • Oral vaccination
  • Paramyosin
  • Recombinant protein
  • Schistosoma japonicum
  • Schistosomiasis
  • Tegumental damage

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

Fingerprint Dive into the research topics of 'Oral vaccination of mice with recombinant Schistosoma japonicum proteins induces specific anti-parasite antibodies and damage to adult worms after a challenge infection'. Together they form a unique fingerprint.

  • Cite this