Defined Combinations of Cryomedia and Thawing Extenders Influence the Viable X-Y Boar Sperm Ratio in Vitro.
CRYO LETTERS 2017;
38:160-165. [PMID:
28767738]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND
It is believed that plasma membrane X- and Y-chromosome bearing sperm are different; therefore the freezing and thawing process may affect X- and Y-sperm differently.
OBJECTIVE
The objective of this study was to investigate the effect of cryomedia and thawing extenders on the survival of X and Y-sperm.
MATERIALS AND METHODS
Three different cryomedia and thawing extenders were compared. Viable motile sperm were separated using a swim-up technique. Real-time PCR was used to identify the sperm type.
RESULTS
Using CryoA for freezing and Beltsville-Thawing-Solution (BTS) as the thawing extender yielded significantly higher numbers of viable motile Y sperm (64 percent) than control (48 percent) (P < 0.01). Conversely, semen freezing with CryoC and thawing with Androstar Plus gave a significantly lower number of viable motile Y sperm (32 percent) than control (51 percent).
CONCLUSION
Our results revealed that defined combinations of cryomedia and thawing extenders significantly altered the survival ratio of frozen-thawed X-Y sperm in vitro, which has potential implications for artificial insemination.
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