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Tsuzuki, Y.,Duran, D.H.,Sawamizu, M.,Ashizawa, K.,Fujihara, N. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.6
This experiment was conducted to evaluate the influence of dimethyl-sulfoxise (DMSO, 0, 5, 50, 100 and $500{\mu}M$) on the motility and acrosome reaction of the frozen-thawed spermatozoa from 3 different bulls (Bull A, Band C). Also we evaluated the developmental capacity of bovine embryos fertilized in a medium containing DMSO at various concentrations. DMSO had negligible effects on the sperm motility and acrosome reaction in all three bulls. However, the development rates from 2 to 16 cells stage on the 3rd day after insemination with 50, 100 and $500{\mu}M$ DMSO in Bull-B, and up to the blastocyst stage fertilized with 5, 50, 100 and $500{\mu}M$ in Bull-A were significantly higher (p<0.05) than those of control ($0{\mu}M$ DMSO) group from each bull. Furthermore, the rates of blastocysts per cleaved embryos of 5 to $500{\mu}M$ DMSO group in Bull-A and of 5 to $100{\mu}M$ DMSO in Bull-C were also significantly higher (p<0.05) than those for their $0{\mu}M$ groups, respectively. These results indicate that DMSO at micromol level used for in vitro fertilization might stimulate the development of embryos for some bulls.
Tsuzuki, Y.,Duran, D.H.,Kuroki, Y.,Uehara, F.,Ashizawa, K.,Fujihara, N. Asian Australasian Association of Animal Productio 1998 Animal Bioscience Vol.11 No.3
The present studies were undertaken to evaluate the effects of a low concentration of dimethyl-sulfoxide (DMSO) on in vitro maturation and development of bovine oocytes fertilized in vitro. Significantly more oocytes reached the metaphase stage of the second meiotic division in TCM-199 supplemented with $50{\mu}M$ DMSO than in the control medium (p < 0.05), and the highest rates of development up to the blastocyst stage were obtained when $50{\mu}M$ DMSO was added to the maturation and culture media (p < 0.05). The avarage of cell numbers of the blastocysts, expanded and hatched blastocysts cultured with $50{\mu}M$ DMSO were 81.7, 125.7 and 129.9 cells, respectively. The proportion of blastocysts with normal chromosome numbers was 90.5%. These results suggest that the addition of $50{\mu}M$ DMSO is beneficial for the maturation of bovine oocytes and production of the blastocysts with high quality.