TY - JOUR
T1 - Mammalian membrane block to polyspermy
T2 - New insights into how mammalian eggs prevent fertilisation by multiple sperm
AU - Gardner, Allison J.
AU - Evans, Janice Perry
PY - 2006
Y1 - 2006
N2 - To inhibit fertilisation by more than one sperm (a condition known as polyspermy), eggs have developed preventative mechanisms known as blocks to polyspermy. The block at the level of the egg extracellular coat (the zona pellucida in mammals, the vitelline envelope in non-mammals) has been well characterised in many different animal species and the block at the level of the egg plasma membrane is understood in some non-mammalian species. However, virtually nothing is known about the membrane block to polyspermy in mammalian eggs, despite data dating back 50-90 years that provide evidence for its existence. In the present review, we will discuss the background on blocks to polyspermy used by animal eggs and then focus on the membrane block to polyspermy in mammalian eggs. This will include a summary of classical studies that provide evidence for this block in mammalian eggs, assays used to study the mammalian membrane block and what has been elucidated from recent experimental studies about the cellular signalling events that lead to membrane block establishment and the mechanism of how the membrane block may prevent additional fertilisation.
AB - To inhibit fertilisation by more than one sperm (a condition known as polyspermy), eggs have developed preventative mechanisms known as blocks to polyspermy. The block at the level of the egg extracellular coat (the zona pellucida in mammals, the vitelline envelope in non-mammals) has been well characterised in many different animal species and the block at the level of the egg plasma membrane is understood in some non-mammalian species. However, virtually nothing is known about the membrane block to polyspermy in mammalian eggs, despite data dating back 50-90 years that provide evidence for its existence. In the present review, we will discuss the background on blocks to polyspermy used by animal eggs and then focus on the membrane block to polyspermy in mammalian eggs. This will include a summary of classical studies that provide evidence for this block in mammalian eggs, assays used to study the mammalian membrane block and what has been elucidated from recent experimental studies about the cellular signalling events that lead to membrane block establishment and the mechanism of how the membrane block may prevent additional fertilisation.
UR - http://www.scopus.com/inward/record.url?scp=29244473553&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=29244473553&partnerID=8YFLogxK
U2 - 10.1071/RD05122
DO - 10.1071/RD05122
M3 - Article
C2 - 16478602
AN - SCOPUS:29244473553
SN - 1031-3613
VL - 18
SP - 53
EP - 61
JO - Reproduction, Fertility and Development
JF - Reproduction, Fertility and Development
IS - 1-2
ER -