Glycosylated F4 (K88) fimbrial adhesin FaeG expressed in barley endosperm induces ETEC-neutralizing antibodies in mice

Jussi Joensuu, Mirkka Kotiaho, Teemu Teeri, Leena Valmu, Anna Maria Nuutila, Kirsi-Marja Oksman-Caldentey, Viola Niklander-Teeri

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Abstrakti

The F4-positive enterotoxigenic Escherichia coli (ETEC) strains are a frequent cause of porcine post-weaning diarrhea. Orally administered F4 fimbriae or FaeG, the major subunit and adhesin of F4, induce a protective mucosal immune response in F4 receptor-positive piglets. Feed plants carrying immunogenic subunit proteins can offer great advantages for oral vaccination of domestic animals. Here, we describe high-level endosperm-specific production (1% of total soluble proteins) of FaeG in the crop plant barley. The endoplasmic reticulum-targeted recombinant endospermic FaeG (erFaeG) was shown to be heterogeneously glycosylated. The erFaeG showed resistance at digestive conditions simulating piglet gastric fluid. Glycosylation did not abolish the immunogenic character of the FaeG protein, since erFaeG was able to induce F4 fimbria-specific antibodies in mice. Biological activity of these anti-F4 antibodies was demonstrated in vitro by blocking the attachment of the F4(+) ETEC to the F4 receptors present on porcine intestinal enterocytes.
Alkuperäiskielienglanti
LehtiTransgenic Research
Vuosikerta15
Numero3
Sivut359-373
Sivumäärä15
ISSN0962-8819
DOI - pysyväislinkit
TilaJulkaistu - 2006
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 414 Maatalouden bioteknologia
  • 411 Maatalous ja metsätieteet

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