摘要
Abstract
Effects of sperm-motility enhancing agents on the in vitro fertilization of buffalo oocytes and their subsequent development in vitro were examined in this study. Buffalo oocytes from ovaries taken at slaughter were matured in vitro for 24-26 h at 38.5 ℃ under a humidified 5% CO2 in air, and then fertilized in vitro using buffalo spermatozoa washed with 50 μg/mL trypsin in experiment 1, treated with different concentration of caffeine (0, 2.5, 5.0, and 10.0 mmol/L) in experiment 2, calcium-ionophore A23187 (0, 0.1, 1.0 and 2.5 μmol/L) in experiment 3 or PHE only, PHE+2.5 mmol/L caffeine+2.5 μmol/L A23187, and PHE+2.5 μmol/L A23187 in experiment 4. At 24 to 26 h post insemination, the oocytes were co-cultured with granulosa cell monolayer in droplets containing culture medium to evaluate their embryonic development. There was a significant decrease (12.5% vs 2.6%, P<0.05) in the proportion of cleaved embryos that developed to blastocyst after sperm treatment with trypsin. The treatment of spermatozoa with caffeine and calcium-ionophore A23187 had no significant effect on cleavage and blastocyst yield. There was a minor improvement in blastocyst yield when PHE combined with calcium-ionophore was employed during IVF. However, high concentrations of caffeine seem to be detrimental to cleavage rate and blastocyst development.关键词
水牛/体外受精,精子活力促进剂/精子/胚胎Key words
Bubalus bubalis/in vitro fertilization/sperm-motility enhancing agent/spermatozoa/embryo分类
农业科技
