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Iodixanol Supplementation During Sperm Cryopreservation Improves Protamine Level and Reduces Reactive Oxygen Species of Canine Sperm

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Journal J Vet Sci
Date 2018 Nov 29
PMID 30481988
Citations 14
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Abstract

The objective of this study was to analyze the protective effects of iodixanol on dog spermatozoa during cryopreservation. The optimal concentration of iodixanol, 1.5%, was determined using fresh spermatozoa and was applied in the following experiments. The 1.5% iodixanol group showed significantly increased sperm motility from that in the control ( < 0.05). Lower mitochondrial reactive oxygen species (ROS) modulator () and pro-apoptotic gene () expressions, together with higher expressions of protamine-2 (), protamine-3 (), anti-apoptotic B-cell lymphoma-2 (), and sperm acrosome associated-3 () genes were detected in the iodixanol-treated group. In addition, decreased protamine deficiency and cryocapacitation were observed in the treatment group. Our results show that supplementation with 1.5% iodixanol is ideal for reducing production of ROS and preventing detrimental effects during the canine sperm cryopreservation process, effects manifested as increased motility and reduced cryocapacitation in frozen-thawed spermatozoa.

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