Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 359-373 |
| Number of pages | 15 |
| Journal | Transgenic Research |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2006 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- barley
- enterotoxigenic Escherichia coli
- F4 (K88) fimbriae
- FaeG
- N-glycosylation
- piglet
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Glycosylated F4 (K88) fimbrial adhesin FaeG expressed in barley endosperm induces ETEC-neutralizing antibodies in mice. / Joensuu, Jussi (Corresponding Author); Kotiaho, Mirkka; Teeri, Teemu; Valmu, Leena; Nuutila, Anna-Maria; Oksman-Caldentey, Kirsi-Marja; Niklander-Teeri, Viola.
In: Transgenic Research, Vol. 15, No. 3, 2006, p. 359-373.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Glycosylated F4 (K88) fimbrial adhesin FaeG expressed in barley endosperm induces ETEC-neutralizing antibodies in mice
AU - Joensuu, Jussi
AU - Kotiaho, Mirkka
AU - Teeri, Teemu
AU - Valmu, Leena
AU - Nuutila, Anna-Maria
AU - Oksman-Caldentey, Kirsi-Marja
AU - Niklander-Teeri, Viola
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
KW - barley
KW - enterotoxigenic Escherichia coli
KW - F4 (K88) fimbriae
KW - FaeG
KW - N-glycosylation
KW - piglet
U2 - 10.1007/s11248-006-0010-7
DO - 10.1007/s11248-006-0010-7
M3 - Article
VL - 15
SP - 359
EP - 373
JO - Transgenic Research
JF - Transgenic Research
SN - 0962-8819
IS - 3
ER -