Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China.
Fertil Steril. 2013 Jul;100(1):256-61. doi: 10.1016/j.fertnstert.2013.03.009. Epub 2013 Mar 30.
To investigate the effect of vitrification on Dnmt1o, Hat1, and Hdac1 promoter CpG island methylation patterns and messenger RNA (mRNA) expression levels in mouse metaphase II (MII) oocytes.
In vitro study.
Academic institution.
ANIMAL(S): Kunming white mice.
INTERVENTION(S): After vitrification, surviving mouse MII oocytes subjected to methylation and expression analysis with fresh oocytes used as a control.
MAIN OUTCOME MEASURE(S): Expression levels of mRNA as measured by real-time reverse-transcriptase polymerase chain reaction of methylation patterns of the CpG islands in the Dnmt1o, Hat1, and Hdac1 promoters analyzed by bisulfite mutagenesis and sequencing.
RESULT(S): The methylation patterns of the promoter CpG islands in Dnmt1o, Hat1, and Hdac1 were not statistically significantly when comparing vitrified oocytes and fresh oocytes. The expression levels of Hat1 and Hdac1 mRNA were not statistically significantly different in comparing in vitrified oocytes and fresh oocytes. The expression of Dnmt1o mRNA was statistically significantly lower in vitrified oocytes compared with fresh oocytes.
CONCLUSION(S): Vitrification did not statistically significantly alter the methylation patterns of the promoter CpG islands in Dnmt1o, Hat1, or Hdac1, but did statistically significantly decrease the expression of Dnmt1o mRNA in mouse MII oocytes.
研究玻璃化对 Dnmt1o、Hat1 和 Hdac1 启动子 CpG 岛甲基化模式和信使 RNA(mRNA)表达水平的影响在小鼠中期 II(MII)卵母细胞中的作用。
体外研究。
学术机构。
昆明小白鼠。
玻璃化后,对存活的小鼠 MII 卵母细胞进行甲基化和表达分析,以新鲜卵母细胞作为对照。
用实时逆转录聚合酶链反应测定 Dnmt1o、Hat1 和 Hdac1 启动子 CpG 岛甲基化模式的 mRNA 表达水平,并用亚硫酸氢盐诱变和测序进行分析。
Dnmt1o、Hat1 和 Hdac1 启动子 CpG 岛的甲基化模式在比较玻璃化卵母细胞和新鲜卵母细胞时没有统计学意义。比较玻璃化卵母细胞和新鲜卵母细胞时,Hat1 和 Hdac1 mRNA 的表达水平没有统计学差异。Dnmt1o mRNA 在玻璃化卵母细胞中的表达明显低于新鲜卵母细胞。
玻璃化处理对 Dnmt1o、Hat1 或 Hdac1 启动子 CpG 岛的甲基化模式没有统计学意义的改变,但明显降低了小鼠 MII 卵母细胞中 Dnmt1o mRNA 的表达。