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相关概念视频

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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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...
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DNA Microarrays02:34

DNA Microarrays

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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...
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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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Organization of Genes02:07

Organization of Genes

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Overview
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What is Gene Expression?01:42

What is Gene Expression?

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Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
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Genomics02:02

Genomics

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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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相关实验视频

Updated: Jun 11, 2025

A Combinatorial Single-cell Approach to Characterize the Molecular and Immunophenotypic Heterogeneity of Human Stem and Progenitor Populations
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scEMB:基因的学习上下文表示基于大规模的单细胞转录组学.

Kang-Lin Hsieh1, Yan Chu2, Xiaoyang Li3,4

  • 1Department of Genitourinary Medical Oncology, Division of Cancer Medicine, UT MD Anderson Cancer Center, Houston, TX 77030, USA.

bioRxiv : the preprint server for biology
|October 10, 2024
PubMed
概括

我们开发了scEMB,这是一个深度学习模型,用于分析单细胞转录组学数据. 它准确地预测基因效应,并有助于发现治疗点,推进精准医学.

关键词:
变压器变压器变压器基因与基因之间的关系在的相关性分析中.在 silico 扰动分析中.单细胞转录组学 单细胞转录组学

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Transcriptome Analysis of Single Cells
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科学领域:

  • 计算生物学 计算生物学
  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 单细胞转录组产生了大量的细胞数据,揭示了异质性,但也带来了计算挑战.
  • 分析复杂的基因-基因关系需要先进的计算工具.
  • 现有的方法难以整合多样化的单细胞数据和预测基因功能.

研究的目的:

  • 开发一种新的深度学习模型,scEMB,用于分析大规模的单细胞转录组学数据.
  • 为了捕捉上下文意识的基因嵌入,并改进下游分析任务.
  • 为了能够准确预测基因扰乱效应,并促进治疗目标的发现.

主要方法:

  • 开发了基于变压器的深度学习模型scEMB.
  • 在超过3000万个单细胞转录组上训练了scEMB,使用了一种新的结合策略.
  • 在多个平台上整合数据,以保持基因表达层次和细胞类型特异性.

主要成果:

  • 与scGPT和Geneformer相比,scEMB在批次集成,聚类和细胞类型注释方面表现优越.
  • 该模型准确地预测了CRISPR编辑数据集和微细胞状态转换中的in silico基因扰动效应.
  • scEMB确定了潜在的阿尔茨海默病风险基因,并显示了针对特定领域应用的强大的微调能力.

结论:

  • scEMB是一个强大的工具,可以从复杂的基因表达数据中提取生物学见解.
  • 该模型模拟波效应的能力加速了治疗的发展.
  • scEMB有可能通过增强的基因相关性分析和目标发现来推进精准医学.