Protective role of antifreeze proteins on sterlet (Acipenser ruthenus) sperm during cryopreservation
Language English Country Netherlands Media print-electronic
Document type Journal Article
PubMed
30022341
DOI
10.1007/s10695-018-0538-5
PII: 10.1007/s10695-018-0538-5
Knihovny.cz E-resources
- Keywords
- Antifreeze proteins, Cryopreservation, Membrane integrity, Motility rate, Sperm quality,
- MeSH
- Cryopreservation methods veterinary MeSH
- Cryoprotective Agents pharmacology MeSH
- Antifreeze Proteins pharmacology MeSH
- Sperm Motility * MeSH
- Fishes physiology MeSH
- Semen Preservation methods veterinary MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Cryoprotective Agents MeSH
- Antifreeze Proteins MeSH
The loss of sperm quality in sterlet (Acipenser ruthenus) due to freeze-thaw process in cryopreservation was investigated in the present study. Two antifreeze proteins (AFPI or AFPIII) were used at different concentrations of 0.1, 1, 10, and 100 μg/mL. We compared motility, curvilinear velocity, and plasma membrane integrity of fresh, cryopreserved sperm, and sperm cryopreserved in the presence of antifreeze proteins. Fresh sperm (control) had 85 ± 4% motility and 160 ± 2 μm/s curvilinear velocity, respectively. After cryopreservation, the motility of frozen-thawed sperm without addition of antifreeze proteins significantly decreased (44 ± 9%), compared to the control. The highest motility of frozen-thawed sperm was obtained in cryopreserved sperm with addition of 1 μg/mL of AFPIII (58 ± 14%). No significant differences were observed in curvilinear velocity between fresh sperm and cryopreserved sperm with/without addition of AFPI or AFPIII. The flow cytometry analysis revealed that fresh sperm contained 94.5 ± 6% live cells, while the cryopreserved sperm only contained 26.6 ± 14% live cells. Supplementation of antifreeze proteins has significantly improved the percentage of live cells in frozen-thawed sperm, except 0.1 μg/ml of AFPI group. No significant difference in percentage of live cells was detected in the sperm cryopreserved with 10 μg/mL of AFPI or AFPIII, compared to fresh sperm. Thus, addition of antifreeze proteins to cryopreservation medium could be considered to improve the post-thawed sperm quality of sterlet.
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