帕奇丁piRNAs控制精子生成期间的离散介质事件,并在空间和时间上限制基因表达
Jacob Ortega1,2, Lamia Wahba3,4,5, Jacob Seemann2
1Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA.
Science advances
|October 2, 2024
概括
在Caenorhabditis elegans中,21U-piRNAs通过控制Polo样酶3 (PLK-3) 表达来调节精子生成,防止介质缺陷并确保适当的染色体分离.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 皮维相互作用RNAs (piRNAs) 在生殖线发育中至关重要,被假设哺乳动物帕奇piRNAs调节非转移子序列.
- 在Caenorhabditis elegans中,已知21U-piRNAs调节编码序列,但它们在精子生成中的特定目标和作用在很大程度上仍未被描述.
研究的目的:
- 为了阐明21U-piRNAs在Caenorhabditis elegans精子生成过程中的功能.
- 在这种情况下,要识别由21U-piRNAs调节的信使RNA目标和生物过程.
- 研究波罗样酶3 (PLK-3) 作为潜在的21U-piRNA点的作用.
主要方法:
- 对21U-piRNA突变的遗传分析,以评估介质进展和染色体行为.
- 使用分子技术识别21U-piRNA点.
- 对PLK-3表达模式的分析和涉及PLK-3删除突变体的功能研究.
主要成果:
- 21U-piRNAs的损失导致同类配对受损,非同类突触,以及精子生成期间交叉形成和染色体分离的缺陷.
- 波罗样酶3 (PLK-3) 被确定为21U-piRNA标,其表达通常仅限于增殖细胞.
- 包丁细胞中PLK-3的扩张与介质缺陷相关,而plk-3的删除可以定量抑制这些缺陷,这表明它具有关键的调节作用.
结论:
- 21U-piRNAs在Caenorhabditis elegans的精子生成中充当帕奇基piRNA的功能,调节关键的介质事件.
- 21U-piRNA-PLK-3调控轴对于通过将PLK-3活动限制在特定细胞阶段来维持介质忠实性至关重要.
- 这项研究揭示了21U-piRNAs确保正确的精子生成的复杂多效应机制.
相关概念视频
piRNA - Piwi-interacting RNAs
6.8K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
6.8K
RNA Interference
26.0K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
26.0K
Experimental RNAi
6.1K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.1K
Negative Regulator Molecules
35.2K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.2K
siRNA - Small Interfering RNAs
16.6K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
16.6K
Inheritance of Chromatin Structures
6.2K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.2K


