相关实验视频
Updated: May 27, 2026

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Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
在绵羊生殖基因组激活过程中,RNA剪接和替代多化简介
Mingtian Deng1, Hua Yang1, Ying Chen2
1Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
Biology of reproduction
|March 29, 2025
概括
紫毒基因组激活 (ZGA) 始于绵羊的16细胞阶段,涉及复杂的RNA代谢,包括替代性多化和拼接. 这项研究揭示了关键的母体基因和对哺乳动物早期发育至关重要的调节机制.
科学领域:
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 在RNA生物学,RNA生物学.
背景情况:
- 紫毒基因组激活 (ZGA) 对于哺乳动物胚胎发育至关重要.
- 绵羊中ZGA启动和RNA代谢的精确时间和分子机制尚不清楚.
研究的目的:
- 为了确定羊胚胎中ZGA的启动阶段.
- 调查复杂的RNA代谢,包括在羊和小鼠中ZGA期间的替代多基化 (APA) 和替代拼接 (AS).
主要方法:
- 在羊的体外受精和胚胎培养.
- α-阿曼丁治疗以评估ZGA时间.
- 权重基因共同表达网络分析以确定关键的母性基因.
- 对替代多基化事件的Dapars分析.
- 分析替代拼接事件及其对ZGA的影响.
主要成果:
- 在绵羊胚胎中,ZGA在16细胞阶段开始,通过α-阿曼治疗得到证实.
- 在16细胞阶段观察到广泛的基因表达和DNA甲基化变化,以及增加的RNA聚合酶II (RNAPII) 活性.
- 在羊和小鼠中鉴定了1957年的关键母性基因,1058/933延长的APA事件和2675/1963 AS事件在ZGA期间.
- 抑制AS导致发育障碍和RNAPII活性降低,这表明AS和RNAPII在调节ZGA方面存在交叉声.
结论:
- 在绵羊胚胎中,ZGA在16细胞阶段开始.
- 复杂的RNA代谢,包括APA和AS,在哺乳动物中调节ZGA方面发挥着关键作用.
- 替代拼接可能通过与RNAPII的相互作用来调节ZGA.
相关概念视频
Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Editing
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
Transcription
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...

