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• W2998492459 abstract "Capacitation-like changes affect sperm of several species, such as ram, reducing cell survival and fertilizing competence. Proteins from seminal plasma stabilize sperm plasma membranes, being an interesting focus to develop strategies for improving cryopreserved ram semen performance. To date, biotechnologies are focused to reduce damage in frozen-thawed ram spermatozoa through the addition of bioactives. Serine Protease Inhibitor Kazal-type 3 (SPINK3) is a little protein synthesized by mouse seminal vesicle and secreted to seminal plasma. While attached to the sperm, this protein binds to non-capacitated sperm and blocks calcium entry, avoiding a premature physiological capacitation and consequently, acrosome reaction. Due to these characteristics, SPINK3 has been proposed as a decapacitating factor. The aim of this work was to assess whether heterologous SPINK3 is able to protect ram sperm from the well-known cell damages produced by freezing/thawing and to understand the mechanisms by which it is acting. Sperm were supplemented with 13 μM SPINK3 before freezing in an egg yolk-based extender or after thawing and selection. Under both conditions, SPINK3 decreased intracellular calcium content (p < 0.05) and reduced the 25 kDa tyrosine phosphorylated protein demonstrating a decapacitating effect, although the addition of the protein before cryopreservation was not enough to improve other sperm parameters. However, the addition of SPINK3 post thawing was able to significantly ameliorate viability, motility, mitochondrial status and to avoid the increase of lipid peroxidation (p < 0.05). Moreover, sperm treated with SPINK3 was not only still capable to fertilize, but also improved it, as evidenced by an increase in the oocyte cleavage rate (p < 0.05) although, the embryo development and embryo quality were not affected. Our findings would contribute to develop a strategy for improving sperm quality by using decapacitating proteins. In fact, the outcomes of this work demonstrate that SPINK3 is able to reduce sperm cryo-injuries when is added after thawing, improving functionality and thus in vitro fertilization results." @default.
• W2998492459 created "2020-01-10" @default.
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• W2998492459 date "2020-03-01" @default.
• W2998492459 modified "2023-10-06" @default.
• W2998492459 title "Recombinant SPINK3 improves ram sperm quality and in vitro fertility after cryopreservation" @default.
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• W2998492459 doi "https://doi.org/10.1016/j.theriogenology.2019.12.019" @default.
• W2998492459 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31911322" @default.
• W2998492459 hasPublicationYear "2020" @default.
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