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- W2159462889 abstract "Cryopreservation of testicular tissue has become a part of gamete preservation in wild animal post-mortem. Using domestic cats as a model for wild felids, this study aimed to (i) investigate the effect of temperature for testicular tissue storage on sperm quality; (ii) compare efficiency of freezing protocols; and (iii) evaluate properties of cryoprotective agents to protect testicular sperm quality. A pair of testes from each cat (n = 9) was cut into four pieces. Three randomly selected pieces were allocated to be (i) fresh controls; (ii) stored at 4°C for 24 h; and (iii) stored at room temperature (28°C) for 24 h. After storage, the testicular tissue from each group was cut into 10 small pieces. One piece was assigned to be a control while the others were assigned to three freezing protocols; −80°C (n = 3), vitrification (n = 3) or two-step freezing (kept above liquid nitrogen vapour for 10 min and submerged in liquid nitrogen) (n = 3). Each of three pieces was frozen using dimethyl sulphoxide (DMSO), ethylene glycol (EG) or DMSO combined with EG. Sperm membrane (SYBR-14/EthD-1) and DNA (acridine orange) integrity were evaluated before and after cryopreservation. The storage of testicular tissue at room temperature decreased the percentage of sperm with intact membrane in fresh tissue (59.5 ± 30.5 vs 87.9 ± 7.0%, p < 0.05). DNA integrity was decreased after 24-h storage either at 4°C or room temperature (p < 0.05). The two-step freezing resulted in a higher percentage of sperm with intact plasma membrane than the other techniques. Dimethyl sulphoxide, EG and DMSO combined with EG provided similar protection for the sperm membrane and DNA from cryodamages. In conclusion, storage of testicular tissue at 4°C is necessary to maintain sperm membrane integrity during transportation of tissue for cryopreservation in the freezing laboratory. The results provide information for male gamete rescue in felid particularly when they die unexpectedly in the field where freezing facilities are not well equipped." @default.
- W2159462889 created "2016-06-24" @default.
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- W2159462889 date "2011-12-07" @default.
- W2159462889 modified "2023-10-16" @default.
- W2159462889 title "Cryopreservation of Cat Testicular Tissues: Effects of Storage Temperature, Freezing Protocols and Cryoprotective Agents" @default.
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- W2159462889 doi "https://doi.org/10.1111/j.1439-0531.2011.01967.x" @default.
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