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Male Mice Deficient for Germ-Cell Cyritestin Are Infertile1
Open accessAbstract
Cyritestin is a membrane-anchored sperm protein belonging to the ADAM (f1.gif" BORDER="0"> f2.gif" BORDER="0">isintegrin and f1.gif" BORDER="0"> f3.gif" BORDER="0">etalloprotease) family of proteins, which are proposed to be involved in cell-cell adhesion through binding to integrin receptors. Several lines of evidence support a role of cyritestin and other members of this protein family in the fusion of sperm and the egg plasma membrane. In an effort to elucidate the physiological function of cyritestin, we have disrupted its locus by homologous recombination. Male homozygous null mutants are infertile, even though spermatogenesis, mating, and migration of sperm from the uterus into the oviduct are normal. In vitro experiments showed that infertility is due to the inability of the cyritestin-deficient sperm to bind to the zona pellucida. However, after removal of the zona pellucida, sperm-egg membrane fusion monitored by the presence of pronuclei and generation of 2- and 4-cell embryos did not reveal any differences from the wild-type situation. These results demonstrate that cyritestin is crucial in the fertilization process at the level of the sperm-zona pellucida interaction.
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Citations
Cited by
Genetic dissection of mammalian fertility pathways
Matzuk, M. M., & Lamb, D. J. (2002) · Nature Cell Biology · doi:10.1038/ncb-nm-fertilitys41 · Cited by 579
A profile of fertilization in mammals
Wassarman, P. M., Jovine, L., & Litscher, E. S. (2001) · Nature Cell Biology · doi:10.1038/35055178 · Cited by 393
Ectodomain shedding and ADAMs in development
Weber, S., & Saftig, P. (2012) · Development · doi:10.1242/dev.076398 · Cited by 259
New insights into the molecular mechanisms of sperm-egg interaction
Nixon, B., Aitken, R. J., & McLaughlin, E. A. (2007) · Cellular and Molecular Life Sciences · doi:10.1007/s00018-007-6552-x · Cited by 103
Mashiko, D., Tonai, S., Miyata, H., Matzuk, M. M., & Ikawa, M. (2025) · eLife · doi:10.7554/elife.107494.3
Metadata
- Authors
- Shamsadin, R., Adham, I. M., Nayernia, K., Heinlein, U. A. O., Oberwinkler, H., & Engel, W.
- Venue
- Biology of Reproduction
- Publisher
- Oxford University Press (OUP)
- Published
- 1999-12-01
- Volume
- 61
- Issue
- 6
- Pages
- 1445-1451
- ISSN
- 0006-3363 (ISSN-L)
- 1529-7268
- OpenAlex
- W1989033643
- Cited by
- 226
- References
- 0
- FWCI
- 10.24
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Male Mice Deficient for Germ-Cell Cyritestin Are Infertile1. https://app.cochat.ai/papers/10.1095/biolreprod61.6.1445
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- Shamsadin, R., Adham, I. M., Nayernia, K., Heinlein, U. A. O., Oberwinkler, H., & Engel, W. (1999). Male Mice Deficient for Germ-Cell Cyritestin Are Infertile1. Biology of Reproduction. https://doi.org/10.1095/biolreprod61.6.1445
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