Abstract:
:Multiple phage-peptide constructs, where the peptides mimic sperm epitopes that bind to zona pellucida (ZP) proteins, were generated via selection from a phage display library using a novel approach. Selections were designed to allow for identification of ZP-binding phage clones with potential species-specific properties, an important feature for wildlife oral vaccines as the goal is to control overpopulation of a target species while not affecting non-target species' reproduction. Six phage-peptide antigens were injected intramuscularly into pigs and corresponding immune responses evaluated. Administration of the antigens into pigs stimulated production of anti-peptide antibodies, which were shown to act as anti-sperm antibodies. Potentially, such anti-sperm antibodies could interfere with sperm delivery or function in the male or female genital tract, leading to contraceptive effects. Staining of semen samples collected from different mammalian species, including pig, cat, dog, bull, and mouse, with anti-sera from pigs immunized with ZP-binding phage allowed identification of phage-peptide constructs with different levels of species specificity. Based on the intensity of the immune responses and specificity of these responses in different species, two of the antigens with fusion peptide sequences GEGGYGSHD and GQQGLNGDS were recognized as the most promising candidates for development of contraceptive vaccines for wild pigs.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Samoylova TI,Cochran AM,Samoylov AM,Schemera B,Breiteneicher AH,Ditchkoff SS,Petrenko VA,Cox NRdoi
10.1016/j.jbiotec.2012.10.006subject
Has Abstractpub_date
2012-12-31 00:00:00pages
311-8issue
2-3eissn
0168-1656issn
1873-4863pii
S0168-1656(12)00681-5journal_volume
162pub_type
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