相关实验视频
Updated: Feb 13, 2026

08:25
Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
12.8K
循环RNAcircHomer1通过核糖蛋白颗粒运输和突触RNA的树突定位调解海马体功能
Ying Cai1, Zhongyu Zheng1, Haoyu Xu1
1School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China.
Science advances
|February 11, 2026
概括
像circHomer1这样的循环RNA对大脑功能至关重要. 这项研究揭示了circHomer1如何向树突中的信使RNA,影响学习,记忆和突触可塑性.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 循环RNAs (circRNAs) 曾经被认为是非编码的副产品.
- 新出现的证据表明,circRNAs在脑功能中起着重要作用,包括神经元传输和突触可塑性.
- 大脑中circRNA功能的精确分子机制尚未得到充分理解.
研究的目的:
- 为了研究circHomer1的作用,一个来自Homer1基因的大脑丰富的circRNA,在依赖海马的学习和记忆中.
- 阐明circHomer1影响神经元功能的分子机制.
主要方法:
- 研究了海马体中circHomer1的功能.
- 研究了circHomer1与Kinesin 1,Fused in Sarcoma (FUS) 和脆弱X精神迟缓蛋白 (FMRP) 的相互作用.
- 评估了对信使RNA向,突触功能,树突性脊柱形态,空间学习和记忆的影响.
主要成果:
- circHomer1对于调解信使RNA编码后突触蛋白的树突向作用至关重要.
- 在树突中,circHomer1充当了Kinesin 1和神经核蛋白颗粒成分 (FUS,FMRP) 之间的分子桥梁.
- 这种相互作用调节突触功能,树突脊柱结构,以及依赖海马的空间学习和记忆.
结论:
- 循环RNAs,以circHomer1为例,是大脑突触功能的关键调节者.
- circHomer1调解突触信使RNA的向,影响树突性脊柱形态和神经元功能.
- 这项研究突出了circRNA参与学习和记忆过程的新机制.
相关概念视频
siRNA - Small Interfering RNAs
18.7K
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...
18.7K
lncRNA - Long Non-coding RNAs
10.0K
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
10.0K
Regulated mRNA Transport
7.0K
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
7.0K
piRNA - Piwi-interacting RNAs
7.7K
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...
7.7K
Carrier-Mediated Transport
1.3K
Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
1.3K
Additional Subnuclear Structures
5.4K
The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals.
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
5.4K

