
TY  - JOUR
A1  - Harayama, Hiroshi 
A1  - Miyake, Masashi 
A1  - Magargee, Susan F. 
A1  - Kunze, Elaine 
A1  - Kato, Seishiro 
A1  - Shidara, Osamu 
A1  - Iwamoto, Eiji 
A1  - Arikawa, Satoko 
A1  - Hammerstedt, Roy H. 
T1  - Changes in epididymal protein anti-agglutinin on ejaculated boar spermatozoa during capacitation <emph type="2">in vitro</emph>
JF  - Reproduction, Fertility and Development
JO  - Reprod. Fertil. Dev.
Y1  - 2000
VL  - 11
IS  - 5
SP  - 193
EP  - 199
KW  - 
UR  - https://doi.org/10.1071/RD99056 
N2  - This study is a detailed investigation of changes in epididymal protein anti-agglutinin on ejaculated boar spermatozoa during an incubation designed to promote capacitation in vitro. Ejaculated spermatozoa were collected from six mature boars, washed, and incubated to promote capacitation. Sperm samples were subjected to Western blotting-densitometric analyses, flow cytometry after immunostaining and immunocytochemical observation by indirect immunofluorescence. An antiserum to anti-agglutinin was raised in a rabbit by subcutaneous injection of a purified antigen, as described previously (Harayama et al. 1999). Western blotting-densitometric analyses revealed an approximate halving of the amount of sperm-bound anti-agglutinin during the first 45-min incubation, followed by a gradual decrease thereafter. Comparison between immunostained sperm samples by flow cytometry before and after incubation confirmed this decrease in sperm-bound anti-agglutinin during the incubation. Microscopic characterization established that this decrease occurred mainly on the acrosome. Supplementation with seminal plasma (5% or 10%, v/v) attenuated the decrease. These findings are consistent with the conclusion that a large portion of the anti-agglutinin bound to sperm acrosomes is released at an early stage of the capacitation process in vitro. 
ER  -

