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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
Characterization of antibodies generated against a conserved portion of oviductal glycoprotein (OGP) and endogenous hamster OGP and their ability to decrease sperm binding to the zona pellucida in vitro.
American Journal of Reproductive Immunology : AJRI 1997 December
PROBLEM: The effect of antibodies generated against hamster oviductal glycoprotein (OGP) on sperm binding to the zona pellucida (ZP) was evaluated.
METHOD OF STUDY: Antibodies against a 17-amino-acid sequence of the OGP core protein (amino acids 52-68) and the denatured hamster OGP protein were generated, characterized, and tested in an in vitro sperm binding assay.
RESULTS: Sperm binding was significantly decreased (P < 0.05) when oviductal oocytes were incubated for 2 hr with 4 or 8 mg/ml of immune IgG of both antibodies when compared with normal rabbit IgG. A fluorescence assay showed binding of both antibodies to the endogenous OGP associated with the ZP of ovulated hamster oocytes.
CONCLUSIONS: These results suggest that OGP may be a potential immunocontraceptive target because both antibodies significantly decreased sperm binding to the ZP of oviductal oocytes. Immunocontraception may be accomplished by attempting to generate active immunity to a recombinant OGP, to the region selected in this study (amino acids 52-68) or to some other region of the core protein.
METHOD OF STUDY: Antibodies against a 17-amino-acid sequence of the OGP core protein (amino acids 52-68) and the denatured hamster OGP protein were generated, characterized, and tested in an in vitro sperm binding assay.
RESULTS: Sperm binding was significantly decreased (P < 0.05) when oviductal oocytes were incubated for 2 hr with 4 or 8 mg/ml of immune IgG of both antibodies when compared with normal rabbit IgG. A fluorescence assay showed binding of both antibodies to the endogenous OGP associated with the ZP of ovulated hamster oocytes.
CONCLUSIONS: These results suggest that OGP may be a potential immunocontraceptive target because both antibodies significantly decreased sperm binding to the ZP of oviductal oocytes. Immunocontraception may be accomplished by attempting to generate active immunity to a recombinant OGP, to the region selected in this study (amino acids 52-68) or to some other region of the core protein.
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