相关实验视频
Updated: Jun 24, 2025

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
4.9K
Src依赖于通过GRIN1异构5的替代拼接来调节LTP
Hongbin Li1, Vishaal Rajani1, Ameet S Sengar1
1Program in Neurosciences & Mental Health, The Hospital for Sick Children , Toronto, ON M5G 1X8, Canada.
概括
替代拼接Grin1基因的替代拼接
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
- 突触性可塑性 突触性可塑性
背景情况:
- 格林1外因子5的替代拼接影响了Schaffer附带-CA1突触的长期强化 (LTP).
- 与表达5 (GluN1b) 的小鼠相比,缺乏5 (GluN1a) 的小鼠显示LTP增加.
- 这种差异的潜在机制尚不清楚.
研究的目的:
- 研究非受体氨酸激酶Src在调节LTP中的作用.
- 阐明Grin1外因子5替代拼接影响突触可塑性的机制.
- 为了确定Src是否调节N-甲基-D-酸盐受体 (NMDAR) 在不同拼接变体中的功能.
主要方法:
- 在小鼠海马皮切片中对LTP的电生理记录.
- 对Src酶活性进行药理学操纵.
- 对NMDAR和AMPA受体电流的测量.
- 对突触传输组件的分析.
主要成果:
- 阻断Src激酶可以防止GluN1a小鼠的LTP诱导,但不能阻止GluN1b小鼠的LTP诱导.
- 在GluN1a小鼠中,Src激活增强了NMDAR电流,但在GluN1b小鼠中没有.
- Src激活增加了GluN1a小鼠中突触潜力的AMPA受体成分,这取决于NMDAR活性.
结论:
- 格林1外因子5的差异拼接决定了Src介导的NMDARs在Schaffer附带-CA1突触中的调节.
- 在GluN1a小鼠中,Src调节NMDARs,促进LTP诱导.
- 在GluN1b小鼠中,NMDARs具有Src耐药性,导致独立于Src活动的LTP.
更多相关视频
相关概念视频
Alternative RNA Splicing
21.1K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.1K
Chromatin Structure Regulates pre-mRNA Processing
7.0K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
7.0K
Regulation of Expression at Multiple Steps
889
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
889
Regulation of Expression Occurs at Multiple Steps
22.6K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
22.6K
RNA Splicing
56.3K
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...
56.3K
What is Gene Expression?
8.5K
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
8.5K

