P-030. Acrosome reaction in different morphological types of spermatozoa evaluated under strict criteria
نویسندگان
چکیده
منابع مشابه
Rab3A 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 کاملProstasome-like vesicles stimulate acrosome reaction of pig spermatozoa
BACKGROUND The presence of small membranous particles characterizes the male genital fluids of different mammalian species. The influence of semen vesicles, denominated prostasomes, on sperm functional properties has been well documented in humans, but their biological activity is scarcely known in other species. The present work investigated prostasome-like vesicles in pig semen for their abil...
متن کاملThe 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 effect of incubation periods under 95% oxygen on the stimulated acrosome reaction and motility of human spermatozoa.
Human sperm samples were prepared on a 30% Percoll gradient and reactive oxygen species (ROS) production was measured. In samples that generated ROS incubation under 95%O2:5%CO2 for 30 min decreased the proportion of spermatozoa capable of the stimulated acrosome reaction by 40% in comparison to samples incubated under 95%N2:5%CO2 (P< 0.001, repeated measures analysis of variance), but the degr...
متن کاملRole of Calcium and Calcium Channels in Progesterone Induced Acrosome Reaction in Caprine Spermatozoa
There are several physiological and pharmacological evidences indicating that opening of voltage dependent Ca channels play a critical role in induction of acrosome reaction in mammalian sperm. We determined the intracellular free Ca concentration in ejaculated goat sperm using a fluorescent, Ca-specific probe, Fura2/AM, after the suspension of sperm in KRB medium, capable of sustaining capacit...
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: Human Reproduction
سال: 1997
ISSN: 1460-2350,0268-1161
DOI: 10.1093/humrep/12.suppl_2.134-a