参考基因U2允许直接比较血管光滑肌细胞在组织和培养中的相对基因表达水平,使用实时定量PCR
Christine Rager1,2, Tobias Klöpper1, Uwe Pfeil3
1Signalling Transduction Group, Institute of Anatomy and Cell Biology, Faculty of Medicine, Justus-Liebig-University, 35392 Giessen, Germany.
Cells
|September 8, 2023
概括
选择适当的参考基因 (RGs) 对于精确的基因表达分析在血管光滑肌细胞 (vSMCs) 中至关重要. 小核核核糖核蛋白U2 (snRNP U2) 被确定为可靠的,独立于性别的RG,用于比较培养的vSMC与原生组织中的vSMC.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 心血管研究研究心血管研究
背景情况:
- 实时定量聚合酶连锁反应 (qPCR) 是基因表达量化的标准方法.
- 不同的生物样本之间的准确比较需要选择稳定的参考基因 (RG).
- 对于血管光滑肌细胞 (vSMC),确定合适的RG对于比较隔离/培养细胞和完整血管内的细胞之间的基因表达至关重要.
研究的目的:
- 为了确定一个合适的基因基因对比基因表达在培养老鼠大动脉vSMCs与完整的大动脉组织vSMCs.
- 评估常用的RG (β-actin和糖-3-脱酶) 的适用性,并探索替代RG.
主要方法:
- 从老鼠大心脏中隔离了皮带中间层.
- 从突尼卡介质的一半直接提取RNA.
- 从膜介质的另一半分离和培养vSMCs,然后进行RNA提取.
- 通过分析两种样本类型中的Ct值,对15种不同的RG进行调查,包括β-actin (Actb) 和糖-3-酸脱酶 (Gapdh).
- 在RG表达的性别依赖变化的评估.
主要成果:
- 通常使用的RGs,Actb和Gapdh,在完整的组织和培养的vSMC之间表现出Ct值的显著差异,使它们不适合.
- 小核核核糖核蛋白U2 (snRNP U2) 在培养的vSMC和完整的大动脉介质之间绝对Ct值没有显著差异.
- 在这个实验设置中,在U2的表达中没有观察到基于性别的显著差异.
结论:
- 小核核核糖核蛋白U2 (snRNP U2) 是一个经过验证的,独立于性别的参考基因,用于将培养中的vSMC中的基因表达与其生理组织环境中的vSMC进行比较.
- 这一发现有助于在vSMC中进行更准确的基因表达研究,弥合了体外和体内模型之间的差距.
- 这项研究强调了在涉及初级细胞和组织比较的qPCR实验中严格对参考基因验证的关键需求.
更多相关视频
相关概念视频
DNA Microarrays
Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
Real Time RT-PCR
Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...
The real-time quantification of the number of amplified products is...
Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...


