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. 2020 Mar 26;10(4):553.
doi: 10.3390/ani10040553.

Proteomic Analysis of Fresh and Liquid-Stored Boar Spermatozoa

Blanka Premrov Bajuk  1 , Petra Zrimšek  1 , Maja Zakošek Pipan  2 , Bruno Tilocca  3 , Alessio Soggiu  4 , Luigi Bonizzi  5 , Paola Roncada  3
Affiliations

Proteomic Analysis of Fresh and Liquid-Stored Boar Spermatozoa

Blanka Premrov Bajuk et al. Animals (Basel). .

Abstract

In this study comparative proteomics was used to define changes in the expression of the spermatozoa proteins during liquid storage. Semen from eight boars was analyzed on the day of collection and after liquid preservation at 15-17 °C for three days. Sperm parameters (concentration, motility, morphology, vitality) and percentage of non-capacitated and acrosomal-reacted spermatozoa were determined. Sperm proteins were extracted and separated by two-dimensional sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and proteomic profiles were computationally compared to highlight differentially expressed protein spots that were, in turn, identified by mass spectrometry. The intensities of four spots were significantly different between fresh and liquid stored sperm. Namely: ATP citrate lyase, chaperonin containing T-complex polypeptide 1 (TCP1) subunit ε and probable phospholipid-transporting ATP-ase were over-expressed in liquid stored sperm, whereas cytosolic non-specific dipeptidase was over-expressed in fresh sperm. These differentially expressed proteins could be used as plausible biomarkers for the evaluation of boar semen quality and spermatozoa survival after liquid storage and could help to address problems associated with sperm preservation.

Keywords: boar spermatozoa; liquid stored semen; proteomics.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Representative 2-D electrophoresis map of boar spermatozoa extracts. (A) Fresh boar spermatozoa extracts, (B) liquid stored boar spermatozoa extracts. Differentially expressed proteins are indicated in the map. KDa: protein molecular weight expressed in kilodalton; pI: isoelectric point.
See this image and copyright information in PMC

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