STUDIES ON THE ACROSOME. IV. THE ACROSOME REACTION IN SOME BIVALVE SPERMATOZOA
نویسندگان
چکیده
منابع مشابه
The effect of platelet activating factor on the motility and acrosome reaction of ram spermatozoa
Platelet activating factor (PAF) is a novel signaling phospholipids that in addition to platelet activation has many biological properties. The acrosome reaction, as an essential step in mammalian fertilization, can occur in response to several agents such as PAF. Therefore, the present study aimed to assess the effect of PAF on the motility and acrosome reaction of ram spermatozoa. Semen was c...
متن کاملThe Acrosome Reaction In
Suspensions of Mytilus edulis eggs were fixed with osmium tetroxide at various intervals between 1 and l0 seconds after heavy insemination, and sectioned for electron microscopy to follow the natural process of acrosome reaction in the spermatozoa around the eggs. Sperm suspensions were also fixed after the addition of I0 per cent by volume of M/3 calcium chloride. Within the first second after...
متن کاملRab3A triggers the acrosome reaction in permeabilized human spermatozoa.
The acrosome reaction is a regulated exocytotic process leading to a massive fusion between the outer acrosomal membrane and the cell membrane. In spite of the great amount of information available related to the acrosome reaction in several species, there is a remarkable paucity about the role of monomeric guanosine triphosphatases (GTPases) of the Rab family-well-established participants in e...
متن کاملRegulating the acrosome reaction.
The acrosome reaction is a secretory event that must be completed by the sperm of many animal species prior to fusion with eggs. In mammals, exocytosis in triggered by ZP3, a glycoprotein component of the egg pellucida, following gamete contact. ZP3 promotes a sustained influx of Ca2+ into sperm that is necessary for the acrosome reaction. Here, we discuss the mechanism by which ZP3 generates C...
متن کاملStudies on acrosome labelling of mammalian spermatozoa by radioactive sugars.
The localization of glycoprotein synthesis and storage was studied during acrosome formation in guinea-pig using fine-structure autoradiography after (3H)-fucose incorporation. Three days after (3H)-fucose injection, labelling in spermatids was concentrated in the matrix of developing acrosomes, and it was evident that the fucosylation of acrosomal glycoproteins largely overshadowed the fucosyl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1955
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1538657