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Aquaglyceroporins but not orthodox aquaporins are involved in the cryotolerance of pig spermatozoa

Journal of Animal Science and Biotechnology 2020年第1期11卷 20-31页

作者： Ariadna Delgado-Bermúdez Marc Llavanera leira fernández-bastit Sandra Recuero Yentel Mateo-Otero Sergi Bonet Isabel Barranco Beatriz fernández-Fuertes Marc Yeste Biotechnology of Animal and Human Reproduction(TechnoSperm) Unit of Cell BiologyDepartment of BiologyFaculty of SciencesInstitute of Food and Agricultural TechnologyUniversity of GironaC/Maria Aurèlia Campany69Campus MontiliviE-17003 GironaSpain

Background:Aquaporins(AQPs)are a family of transmembrane water channels that includes orthodox AQPs,aquaglyceroporins(GLPs)and super ***3,AQP7,AQP9 and AQP11 have been identified in boar sperm,and they are crucial for sperm maturation and *** exchange is an important event in cryopreservation,which is the most efficient method for long-term storage of ***,the freezethaw process leads to sperm damage and a loss of fertilizing *** that the quality of frozenthawed sperm partially depends on the regulation of osmolality variations during this process,AQPs might play a crucial role in boar semen *** this context,the aim of this study was to unravel the functional relevance of the different groups of AQPs for boar sperm cryotolerance through three different ***:Inhibition of different groups of AQPs was found to have different effects on boar sperm *** the use of 1,3-propanediol(PDO),an inhibitor of orthodox AQPs and GLPs,decreased total motility(P<0.05),it increased post-thaw sperm viability,lowered membrane lipid disorder and increased mitochondrial membrane potential(MMP)(P<0.05).When acetazolamide(AC)was used as an inhibitor of orthodox AQPs,the effects on post-thaw sperm quality were restricted to a mild increase in MMP in the presence of the intermediate concentration at 30 min post-thaw and an increase in superoxide levels(P<0.05).Finally,the addition of phloretin(PHL),a GLP inhibitor,had detrimental effects on post-thaw total and progressive sperm motilities,viability and lipid membrane disorder(P<0.05).Conclusions:The effects of the different inhibitors suggest that GLPs rather than orthodox AQPs are relevant for boar sperm ***,the positive effect of PDO on sperm quality suggests a cryoprotective role for this molecule.

关键词： Acetazolamide Aquaporins Boar Phloretin Propanediol Sperm

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