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Updated: Jul 3, 2026
05:44
Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
Published on: March 1, 2019
Sperm penetration through cumulus mass and zona pellucida
Ekyune Kim1, Misuzu Yamashita, Masanori Kimura
1Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba Science City, Ibaraki, Japan.
The International Journal of Developmental Biology
|July 24, 2008
Summary
Sperm use hyaluronidase and protease enzymes to break through the egg's cumulus mass and zona pellucida, crucial steps for mammalian fertilization that are still being studied.
Area of Science:
- Reproductive biology
- Molecular mechanisms of fertilization
Background:
- Mammalian fertilization involves sperm penetrating the cumulus mass and zona pellucida.
- The precise molecular mechanisms of this sperm penetration are not fully understood.
- Sperm motility, hyaluronidase, and proteases are implicated in overcoming these barriers.
Purpose of the Study:
- To investigate the functional roles of sperm hyaluronidase and protease.
- To elucidate their contribution to sperm passage through the cumulus and zona pellucida.
Main Methods:
- Focus on the enzymatic activities of hyaluronidase and protease.
- Analysis of sperm's role in penetrating the cumulus and zona pellucida.
Main Results:
- Hyaluronidase and protease are key enzymes involved in sperm penetration.
- These enzymes facilitate sperm passage through the physical barriers of the egg.
Conclusions:
- Sperm hyaluronidase and protease play critical functional roles in mammalian fertilization.
- Understanding these enzymes is essential for comprehending sperm-egg interaction.
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