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- W2099354420 abstract "Cryopreservation is partially damaging and induces capacitation-like changes in spermatozoa. Seminal plasma (SP) contains a variety of biochemical components, such as protein and lipids, which are specific for the regulation of sperm cell function including those effective for decapacitation of spermatozoa. Therefore, this study tested the hypothesis that desalted and lyophilized SP could prevent premature capacitation (cryocapacitation) of Japanese Black bull spermatozoa. Seminal plasma was desalted by using Sephadex G-25 desalting column and lyophilized before added to semen extender at final concentrations 0, 2.5, 12.5, and 25 mg/mL. Frozen-thawed sperm progressive motility, acrosomal integrity, abnormal morphology, and the calcium ionophore A23187-induced acrosome reaction were assessed. Protein and lipid compositions in SP were analyzed by SDS-PAGE and thin-layer chromatography, respectively. The results revealed that progressive motility, intact acrosome, and abnormal morphology were not substantially modified by addition of SP. Stimulation of spermatozoa with calcium ionophore A23187 resulted in a time-dependent induction of the acrosome reaction, which was delayed by the desalted and lyophilized SP. There was no difference in the protein profile of SP before and after gel filtration. In total, 19 protein bands with molecular masses ranging from 5.2 to 185.8 kDa were detected and those of 185.8, 80, 34, 20.8, 18.8, 17.5, and 10 kDa were considered as novel proteins. Neutral lipids and phospholipids before and after gel filtration were the same, and the detected neutral lipid spots were monoacylglycerol, cholesterol, 1,2- and 1,3-disaturated diacylglycerol, 1,2- and 1,3-saturated, unsaturated diacylglycerol, whereas the detected phospholipid spots were sphingomyelin, phosphatidylcholine, phosphatidylserine, and three species of phosphatidylinositol, phosphatidylethanolamine, cerebroside, and polyglycerol phosphatide. The results suggest that premature capacitation during freeze-thaw processes could be reduced by adding desalted and lyophilized SP." @default.
- W2099354420 created "2016-06-24" @default.
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- W2099354420 date "2015-01-01" @default.
- W2099354420 modified "2023-10-05" @default.
- W2099354420 title "Desalted and lyophilized bovine seminal plasma delays induction of the acrosome reaction in frozen-thawed bovine spermatozoa in response to calcium ionophore" @default.
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- W2099354420 doi "https://doi.org/10.1016/j.theriogenology.2014.09.004" @default.
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