相关实验视频

Updated: Jun 24, 2025

Using Fluorescence In Situ Hybridization FISH to Monitor the State of Arm Cohesion in Prometaphase and Metaphase I Drosophila Oocytes

Using Fluorescence In Situ Hybridization FISH to Monitor the State of Arm Cohesion in Prometaphase and Metaphase I Drosophila Oocytes

Published on: December 6, 2017

一个RNAi屏幕用于识别Drosophila卵细胞中介质预相期间凝聚力再生所需的蛋白质

Muhammad A Haseeb¹, Alana C Bernys^1,2, Erin E Dickert^1,3

¹Department of Biological Sciences, Dartmouth College, Hanover, NH, USA 03755.

G3 (Bethesda, Md.)

|June 7, 2024

概括

在Drosophila卵细胞中,体凝聚力的复苏需要Brahma和Pumilio在预相过程中调节Nipped-B-依赖的凝聚力负载,防止细胞老化时染色体分离错误.

科学领域:

细胞生物学细胞生物学
遗传学是一个遗传学.
发展生物学发展生物学

背景情况:

准确的染色体分离在变化过程中依赖于姐妹染色体凝聚力,建立在前变化S阶段.
介质凝聚力可以随着年龄的增长而恶化,特别是在人类卵细胞中,导致分离错误的增加.
在Drosophila卵细胞中的凝聚力再生计划在介质前期建立了新的凝聚性联系.

研究的目的:

为了确定对前期凝聚力复原至关重要的蛋白质,与S期凝聚力建立不同.
为了调查布拉玛和Pumilio在维持介质凝聚力的作用.

主要方法:

使用了Gal4-UAS可诱导RNAi屏幕,在Drosophila中具有明显的生殖系驱动因素.
进行光 in situ 杂交,以评估染色体臂凝聚力.
对特定的基因进行了预相淘汰实验.

主要成果:

鉴定了29种基因产物,这些基因产物对于预相凝聚力复原至关重要,因为它们的淘汰会增加分离错误.
布拉玛或Pumilio的预相淘汰导致重组同源的错误分离增加,这表明手臂凝聚力过早丧失.
在介质预相期间需要布拉玛,Pumilio和Nipped-B来保持手臂凝聚力.

结论:

布拉玛和Pumilio调节Nipped-B-依赖的凝聚力负载在介质前期凝聚力再生过程中.
这些发现阐明了维持介质凝聚力的机制,并防止与年龄相关的分离错误.

关键词:

这种植物是Drosophila.布拉玛·布拉玛是什么意思布拉玛尼普德-B-B 的意思在Pumilio Pumilio中,我们可以看到介质变化 (meiosis) 是一种变质的过程.卵子细胞卵子细胞姐妹染色体凝聚力的一致性

更多相关视频

Evaluation of the Spindle Assembly Checkpoint Integrity in Mouse Oocytes

Evaluation of the Spindle Assembly Checkpoint Integrity in Mouse Oocytes

Published on: September 13, 2022

Meiotic Spindle Assessment in Mouse Oocytes by siRNA-mediated Silencing

Meiotic Spindle Assessment in Mouse Oocytes by siRNA-mediated Silencing

Published on: October 11, 2015

相关概念视频

piRNA - Piwi-interacting RNAs

piRNA - Piwi-interacting RNAs

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...

Meiosis II

Meiosis II

Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...