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. 1989 Sep;57(9):2764–2770. doi: 10.1128/iai.57.9.2764-2770.1989

Cross-reactivity of Pseudomonas aeruginosa antipilin monoclonal antibodies with heterogeneous strains of P. aeruginosa and Pseudomonas cepacia.

L Saiman 1, J Sadoff 1, A Prince 1
PMCID: PMC313523  PMID: 2569448

Abstract

Much of the morbidity and mortality in patients with cystic fibrosis (CF) is secondary to pulmonary infections with Pseudomonas aeruginosa and, more recently, with Pseudomonas cepacia. Prevention of colonization and subsequent infection would be a useful therapeutic strategy. The pili (fimbriae) of P. aeruginosa are a potential vaccine antigen, as they have been implicated in binding to respiratory epithelium and appear to have limited antigenic diversity. Monoclonal antibodies (MAbs) raised to P. aeruginosa pilin demonstrated significant cross-reactivity, as four of five P. aeruginosa strains with known pilin sequences and 10 of 15 P. aeruginosa clinical isolates hybridized by immunoblot with at least one of the three MAbs tested. The P. cepacia strains demonstrated minimal cross-reactivity with these MAbs, as only 2 of 16 strains hybridized immunologically. The three MAbs decreased the adherence of 35S-labeled P. aeruginosa PA1244 to bovine tracheal cells by 56, 45, and 31%. One of these MAbs decreased the adherence of strains P. aeruginosa PAO1 and P. cepacia 249 to CF epithelial cells by 46 and 25%, respectively. While antibodies to Pseudomonas pili must be shown to be protective in patients with CF, these studies give support for a multivalent vaccine strategy using P. aeruginosa pilin as the immunogen.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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