Effect of two sulfur-containing amino acids, taurine and hypotaurine in European sea bass (Dicentrarchus labrax) sperm cryopreservation. | - CCMAR -

Journal Article

TítuloEffect of two sulfur-containing amino acids, taurine and hypotaurine in European sea bass (Dicentrarchus labrax) sperm cryopreservation.
Publication TypeJournal Article
AuthorsMartínez-Páramo, S, Diogo, P, Dinis, MT, Soares, F, Sarasquete, C, Cabrita, E
Year of Publication2013
JournalCryobiology
Volume66
Questão3
Date Published2013 Jun
Pagination333-8
ISSN1090-2392
Palavras-chaveAnimals, Bass, Cell Survival, Cryopreservation, Cryoprotective Agents, DNA Fragmentation, Glutathione Peroxidase, Glutathione Reductase, Lipid Peroxidation, Male, Semen Analysis, Semen Preservation, Sperm Motility, Spermatozoa, Superoxide Dismutase, Taurine
Abstract

In the present work, taurine and hypotaurine were evaluated as potential additives to improve European sea bass (Dicentrarchus labrax) sperm quality after cryopreservation. For cryopreservation, three different extenders were used: control extender (NAM), supplemented with 1mM taurine or supplemented with 1mM hypotaurine, all of them containing 10% Me₂SO as cryoprotectant. To evaluate sperm quality of fresh and thawed sperm, motility (CASA: computer assisted sperm analysis), viability (SYBR Green/propidium iodide), lipid peroxidation (malondialdehyde level), protein oxidation (carbonyl content), glutathione peroxidase, glutathione reductase and superoxide dismutase activities and DNA fragmentation (comet assay) were quantified. The result demonstrated that 1 mM hypotaurine supplemented extender increased total motility (30.1 ± 3.2%), and that 1 mM taurine extender produced higher velocity (18.1 ± 2.6 μm/s) and linearity (46.0 ± 4.8%) than the control extender (21.8 ± 3.2%, 15.5 ± 1.3 μm/s, 41.8 ± 2.4%, respectively). Cell viability, lipid peroxidation and protein oxidation were not statistically different between treatments. Similar results were obtained for glutathione peroxidase and superoxide dismutase activities. Only glutathione reductase showed differential activity before and after freezing, increasing its activity in thawed sperm. Regarding the comet assay results, taurine and hypotaurine significantly reduced DNA fragmentation (52.8 ± 0.9% and 51.8 ± 0.9%, respectively) in comparison to the control (55.7 ± 0.8%). In conclusion, for European sea bass sperm cryopreservation, extenders supplemented with 1 mM taurine and 1 mM hypotaurine improved some parameters of sperm quality after thawing, resulting in better motility and lower DNA damage than the control, two very important factors related to fertilization success.

DOI10.1016/j.cryobiol.2013.04.001
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/23583301?dopt=Abstract

Alternate JournalCryobiology
PubMed ID23583301