Abstract
Cryopreservation of testicular tissue is a promising method of preserving male reproductive potential for avian species. This study was conducted to assess whether a vitrification method can be used to preserve avian testicular tissue, using the Japanese quail (Coturnix japonica) as a model. A simple vitrification method that included dimethyl sulphoxide, ethylene glycol, and sucrose as cryoprotective agents, and allowed the storage of tissue in a sealed macrotube was applied to the testicular tissue from 1-wk-old Japanese quail. The vitrified tissue was warmed at room temperature or at 40°C. After warming, tissue was implanted onto the chorioallantoic membrane of 8- to 9-d-old chicken embryos and the vascularization of the grafts was evaluated. When compared with fresh tissue, the tissue that had been warmed at 40°C showed no difference in vascularization. The tissue that had been warmed at room temperature was significantly less vascularized than the fresh tissue. Vitrification of testicular tissue and storage in macrotubes provide a promising model for preservation and recovery of male germplasm of avian species.
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