过表达组蛋白H3K9me3去甲基化酶对猪克隆胚胎发育的影响
收稿日期: 2022-07-18
修回日期: 2022-11-08
网络出版日期: 2022-11-28
基金资助
广东省自然科学基金项目(2019B1515210027);广东特支计划本土创新创业团队项目(2019BT02N630);广东省畜禽地方品种保护与开发利用提升工程项目资助
Effects of overexpression of histone H3K9me3 demethylase on development of porcine cloned embryos
Received date: 2022-07-18
Revised date: 2022-11-08
Online published: 2022-11-28
Supported by
the Natural Science Foundation of Guangdong Province(2019B1515210027);Guangdong Special Support Plan Local Innovation and Entrepreneurship Team(2019BT02N630);Guangdong Province Livestock and poultry Local Breed Protection and Development and Utilization Promotion Project]
组蛋白异常修饰是克隆胚胎发育的重要制约因素，组蛋白H3K9me3去甲基化酶KDM4家族的过表达可以有效提高克隆胚胎的发育效率。为探究过表达H3K9me3去甲基化酶对猪克隆胚胎发育的影响，本研究在猪克隆胚胎1-细胞期和2-细胞期分别注射KDM4A mRNA和KDM4D mRNA检测胚胎的囊胚率；收集1-细胞期注射KDM4A mRNA和胚胎注射水(对照组)的2-细胞期克隆胚胎检测H3K9me3表达水平；此外，收集1-细胞期注射KDM4A mRNA和胚胎注射水的4-细胞期克隆胚胎进行单细胞转录组测序，并对测序数据进行GO与KEGG富集分析。结果显示：在1-细胞期注射KDM4A mRNA 的猪克隆胚胎囊胚率显著高于对照组(25.32 ± 0.74% vs 14.78 ± 0.87%)，注射KDM4D mRNA对猪克隆胚胎囊胚率无明显作用(16.27 ± 0.77% vs 14.78 ± 0.87%)；在2-细胞期注射KDM4A mRNA和KDM4D mRNA的克隆胚胎囊胚率与对照组相比均无显著差异(32.18 ± 1.67%、30.04 ± 0.91% vs 31.22 ± 1.40%)。在1-细胞期注射KDM4A mRNA的克隆胚胎组蛋白H3K9me3表达水平低于对照组。通过测序，筛选出133个差异表达基因，其中上调基因52个、下调基因81个，GO分析主要富集到与蛋白质定位相关的通路，KEGG分析富集到细胞衰老和急性髓细胞白血病等相关通路。本研究结果表明，过表达组蛋白H3K9me3去甲基化酶KDM4A可以显著提高猪克隆胚胎的发育效率。
李亚楠, 张贤君, 张宁, 梁雅琳, 张宇星, 招华兴, 李紫聪, 黄思秀 . 过表达组蛋白H3K9me3去甲基化酶对猪克隆胚胎发育的影响[J]. 遗传, 2023 , 45(1) : 67 -77 . DOI: 10.16288/j.yczz.22-244
The abnormal modification of histone is an important factor restricting development of porcine cloned embryos. Overexpression of histone H3K9me3 demethylase KDM4 family can effectively improve the developmental efficiency of cloned embryos. In order to explore the effects of overexpression of H3K9me3 demethylase on the development of porcine cloned embryos, KDM4A mRNA and KDM4D mRNA were injected respectively into porcine cloned embryos at the 1-cell stage and 2-cell stage to detect the blastocyst rate; 2-cell stage cloned embryos injected with KDM4A mRNA and embryo injection water (the control group) at the 1-cell stage were collected to detect the expression level of H3K9me3, and 4-cell stage cloned embryos were collected for single cell transcriptome sequencing, then the sequencing data was analyzed with KEGG and GO. The results showed that the blastocyst rate of porcine cloned embryos injected with KDM4A mRNA at 1-cell stage was significantly higher than that of the control group (25.32 ± 0.74% vs 14.78 ± 0.87%), while cloned embryos injected with KDM4D mRNA had a similar blastocyst rate with cloned embryos in control group (16.27 ± 0.77% vs 14.78 ± 0.87%). Porcine cloned embryos injected with KDM4A mRNA and KDM4D mRNA at 2-cell stage had a similar blastocyst rate with cloned embryos in control group (32.18 ± 1.67%, 30.04 ± 0.91% vs 31.22 ± 1.40%). The expression level of H3K9me3 in cloned embryos injected with KDM4A mRNA at 1-cell stage was lower than that in control group. There were 133 differentially expressed genes detected by transcriptome sequencing, including 52 up-regulated genes and 81 down-regulated genes. Pathways enriched by GO analyses were mainly related to protein localization. Pathways enriched by KEGG analyses were related to cellular senescence and acute myeloid leukemia. These results suggest that overexpression of histone H3K9me3 demethylase KDM4A can significantly improve the developmental efficiency of porcine cloned embryos.
Key words： pig; cloning embryo; H3K9me3; KDM4A; KDM4D
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