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Updated: May 14, 2025
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Zinc-finger Nuclease Enhanced Gene Targeting in Human Embryonic Stem Cells
Published on: August 23, 2014
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Structural basis of ZP2-targeted female nonhormonal contraception
Elisa Dioguardi1, Alena Stsiapanava1, Eileen Fahrenkamp1
1Department of Medicine, Karolinska Institutet, Huddinge 14183, Sweden.
Summary
Monoclonal antibody IE-3 blocks mouse fertilization by targeting zona pellucida protein 2 (ZP2). Its derived fragment (scFV) also prevents fertilization, revealing structural insights for nonhormonal contraceptive development.
Area of Science:
- Reproductive biology
- Immunology
- Structural biology
Background:
- Monoclonal antibody IE-3 targets zona pellucida protein 2 (ZP2), a key component of the mouse oocyte zona pellucida.
- ZP2 plays a crucial role in the fertilization process.
Purpose of the Study:
- To investigate the mechanism by which IE-3 prevents fertilization.
- To determine the structural basis of the interaction between IE-3 and ZP2.
- To explore the potential of IE-3-derived fragments for contraceptive development.
Main Methods:
- In vitro fertilization assays using IE-3 derived single-chain variable fragment (scFV).
- Structural analysis of the IE-3/ZP2 interaction.
- Epitope mapping and binding affinity studies.
Main Results:
- An IE-3 derived scFV is sufficient to block mouse fertilization in vitro.
- The high affinity interaction between IE-3 and ZP2 is characterized by induced fit of the epitope.
- Structural insights into the IE-3/ZP2 recognition mechanism were determined.
Conclusions:
- IE-3 and its derived scFV effectively prevent mouse fertilization by targeting ZP2.
- The structural basis of this interaction provides a foundation for designing targeted, nonhormonal contraceptives.
- This approach offers potential for developing contraceptives with minimal off-target effects.
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