Seminal plasma proteins and the reaction of spermatozoa from intact boars and from boars without seminal vesicles to cooling

in Reproduction
Authors:
H. D. M. Moore
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,
G. A. Hall
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, and
K. G. Hibbitt
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DOI:
https://doi.org/10.1530/jrf.0.0470039
Volume/Issue:
Volume 47: Issue 1
Page Range:
39–45
Article Type:
Research Article
Online Publication Date:
May 1976
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Summary.

Spermatozoa from intact boars and from boars without seminal vesicles were resuspended in diluent and cooled at different rates to 0°C. Glutamic oxaloacetic transaminase and lactate dehydrogenase activities were greater in the diluents which had contained spermatozoa from intact boars than in those which contained spermatozoa from animals without seminal vesicles. The incubation of seminal plasma from an intact boar with spermatozoa from a vesiculectomized animal before cooling also increased the enzyme activity in the diluent. The factors responsible for this effect were associated with the basic protein fractions of boar seminal plasma, in particular the proteins with haemagglutinating activity which may have been adsorbed onto the spermatozoa. Spermatozoa were exposed to colloidal Fe(OH)2+ to determine by electron microscopy the charge on the surface of the plasma membrane of washed epididymal spermatozoa and ejaculated spermatozoa from intact and vesiculectomized boars. Epididymal spermatozoa bound the positively charged particles more readily than the ejaculated spermatozoa from the intact boars, due to the absence of membrane-bound protein.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899