Abstract：
:Immunologically based fertility control vaccines against zona pellucida (ZP) proteins are being developed in New Zealand for biocontrol of the brushtail possum (Trichosurus vulpecula), an introduced Australian marsupial pest. We have shown that immunization of female possums with recombinant possum ZP3 protein (rZP3) reduced fertility by 79%. To enhance the specificity of possum immunocontraceptive vaccines, B-cell epitopes on possum ZP3 protein were mapped using sera of female possums immunized with possum rZP3 and subjected to a fertility trial. The amino acid sequence of the full-length possum ZP3 protein was used to synthesize a complete set of 83 (12-mer) biotinylated peptides each with an overlap of five amino acids with the neighboring peptides. The peptides were used in a modified enzyme-linked immunosorbent assay (ELISA) to identify continuous epitopes recognized by antibodies in the sera of possums immunized with possum rZP3. Sixteen epitopes were identified on the possum ZP3 protein. Comparison of the ELISA binding patterns of these peptides to antibodies in the individual sera with the fertility status of rZP3-immunized possums identified only one epitope (amino acids 156-172) to be associated with infertility. However, female possums immunized with this epitope showed no significant reduction in fertility. The possible reasons for the failure of this potential infertility epitope are discussed.
journal_name
Vaccinejournal_title
Vaccineauthors
Cui X,Duckworth JA,Molinia FC,Cowan PEdoi
10.1016/j.vaccine.2009.11.052subject
Has Abstractpub_date
2010-02-10 00:00:00pages
1499-505issue
6eissn
0264-410Xissn
1873-2518pii
S0264-410X(09)01855-6journal_volume
28pub_type
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