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- W575297102 abstract "The objectives of this study were study a practical method to characterize bovine spermatogenic cells and test the efficiency cells conservation by refrigeration at 4°C and cryopreservation in different solutions using two cooling curves. Cellular identification was performing by analysis of shape, size and morphology, associated with nucleus positioning and nuclear-cytoplasm ratio (NCR). Cellular samples were kept at 4°C for a period of 96 h in refrigeration solution and every 24h plasma membrane and DNA integrity were evaluated. Cryopreservation of cells was carried out using solutions containing 10% Dimethyl sulfoxide, 5% Dimethylformamide, 7% Glycerol and 7% Ethylene glycol, using a controlled and non-controlled cooling curve. Results of cellular characterization demonstrated that spermatocytes II presented a cylindrical shape, NCR of 1:1.5 and diameter ranging from 14.5 to 17.5 μm. Round spermatids presented diameter ranging from 7.6 to 13.4 μm, acrosomal cap and NCR of 1:2. Elongation and elongated spermatids showed to marked divergence in shape. There was a daily significant loss of viability of cooled cells until third day of storage, however they presented 72.77±5.16% viability after 4 days of storage at 4°C. There was no difference among the cryoprotectant solutions and cooling curves. In conclusion we demonstrated that association of microscopes and staining was a practical method to identify bovine spermatogenic cells. Furthermore, refrigeration at 4°C is an important strategy to preserve over 70% of viable cells after 4 days and cryopreservation, regardless of cryoprotectant solution or cooling curve used, can maintain over 50% of cells viable." @default.
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- W575297102 date "2015-08-01" @default.
- W575297102 modified "2023-09-24" @default.
- W575297102 title "Morphological characterization and conservation of bovine spermatogenic cells by refrigeration at 4°C and freezing using different cryoprotective molecules" @default.
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- W575297102 doi "https://doi.org/10.1016/j.cryobiol.2015.06.003" @default.
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