相关实验视频
Updated: Jun 30, 2025

05:22
Analyzing Multifactorial RNA-Seq Experiments with DiCoExpress
Published on: July 29, 2022
3.5K
eSVD-DE:使用指数级家族嵌入的单细胞RNA-seq数据中的队列范围的差异表达
Kevin Z Lin1, Yixuan Qiu2, Kathryn Roeder3
1Department of Biostatistics, University of Washington, Seattle, WA, USA. kzlin@uw.edu.
BMC bioinformatics
|March 15, 2024
概括
我们开发了eSVD-DE,这是一种分析大型单细胞RNA测序 (scRNA) 数据集的新方法,以在队列中找到差异表达的基因. 这种方法准确地识别了个体层面的基因表达差异,这对于人口研究至关重要.
科学领域:
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
- 计算生物学 计算生物学
背景情况:
- 单细胞RNA测序 (scRNA) 数据越来越多地用于临床和队列研究.
- 由于个体变异,现有的方法难以在大型scRNA数据集中识别差异表达 (DE) 基因.
- 分析大型队列在计算个人级别混共变量和稀少观察到的基因方面存在挑战.
研究的目的:
- 在大型单细胞RNA测序队列中开发一种用于差异基因表达分析的新方法.
- 为了应对在队列范围内的DE分析中个体变异和混共变量所带来的挑战.
- 在大规模scRNA研究中提高DE基因检测的准确性和功率.
主要方法:
- 开发了eSVD-DE,这是一种矩阵因子化方法,可以跨基因汇集信息并删除混的共变量.
- 实施了一种新的两样本测试,以检测病例和对照组之间的平均表达差异.
- 利用层次模型来测试后端平均分布的差异,减轻1型错误的膨胀.
主要成果:
- 与用于队列范围内的DE分析的现有方法相比,eSVD-DE的准确性和功率更高.
- 该方法有效地将基因之间的信息汇集在一起,并考虑个人层面的混效应.
- 成功克服了通常在基于缩小尺寸的差异测试中看到的1型错误膨胀.
结论:
- eSVD-DE提供了一种强大的新方法,用于测试大scRNA队列中差异性基因表达的维度后缩小.
- 准确的个体水平差异表达识别对于将scRNA-seq发现与人类人口理解联系起来至关重要.
- 这种方法提高了scRNA测序数据在大型临床和人群研究中的实用性.
相关概念视频
RNA-seq
10.0K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
10.0K
Cell Specific Gene Expression
13.6K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
13.6K
DNA Microarrays
17.4K
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...
17.4K
Comparing Copy Number Variations and SNPs
17.7K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.7K
Extraction: Partition and Distribution Coefficients
2.4K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
For extracting a solute from an aqueous phase into an...
2.4K
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

