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Despite huge progress in hormonal therapy and improved  in vitro  fertilization methods, the success rates in infertility treatment are still limited. A recently discovered mechanism revealed the interplay between the plasma protein fetuin‐B and the cortical granule‐based proteinase ovastacin to be a novel key mechanism in the regulation of fertilization. Upon sperm–egg fusion, cleavage of a distinct zona pellucida component by ovastacin destroys the sperm receptor, enhances zona robustness, and eventually provides a definitive block against polyspermy. An untimely onset of this zona hardening prior to fertilization would consequently result in infertility. Physiologically, this process is controlled by fetuin‐B, an endogenous ovastacin inhibitor. Here we aimed to discover small‐molecule inhibitors of ovastacin that could mimic the effect of fetuin‐B. These compounds could be useful lead structures for the development of specific ovastacin inhibitors that can be used in infertility treatment or  in vitro  fertilization

chemmedchem

A Primary Evaluation of Potential Small‐Molecule Inhibitors of the Astacin Metalloproteinase Ovastacin, a Novel Drug Target in Female Infertility Treatment