使用ddHodge的高维细胞状态动态的几何维度维护向量场重建
Kazumitsu Maehara1,2, Yasuyuki Ohkawa3
1Department of Multi-Omics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Nature communications
|December 29, 2025
概括
科学家们开发了ddHodge,这是一个新的计算框架,用于精确地从单细胞RNA测序数据中分析细胞分化动态. 这种方法揭示了基因表达的潜在景观,并确定了驱动细胞命运决策的关键基因.
科学领域:
- 计算生物学 计算生物学
- 发展生物学 发展生物学
- 基因组学就是基因组学.
背景情况:
- 细胞分化涉及动态的基因表达变化,对发育至关重要.
- 单细胞RNA测序 (scRNA-seq) 提供数据来推断这些动态.
- 现有的基于速度的方法在数据稀疏性和高维度上扎,以捕捉加速.
研究的目的:
- 从scRNA-seq数据开发一个强大的计算框架,用于精确的向量场重建.
- 提取二级衍生信息,包括细胞状态加速.
- 分析基因表达动态和量化差异化强度.
主要方法:
- 开发了ddHodge,一个利用Hodge分解进行矢量场重建的框架.
- 扩展ddHodge以在低维多样体上近似高维基因表达动态.
- 应用ddHodge对来自小鼠胚胎生成的scRNA-seq数据.
主要成果:
- ddHodge准确地恢复了矢量场组件 (梯度,曲线,分歧) 和细胞状态加速.
- 在发育过程中发现的基因表达动态遵循潜在的景观梯度系统.
- 使用分歧量化差异化功效,并确定了关键的功效驱动基因.
结论:
- ddHodge为分析复杂的生物系统提供了一个通用的计算框架.
- 该研究使用真实数据阐明了细胞在发育过程中的命运决定.
- 确定了潜在的景观和控制差异化功能的关键基因.
相关概念视频
Henderson-Hasselbalch Equation
63.2K
The ionization-constant expression for a solution of a weak acid can be written as:
63.2K
Crystal Field Theory - Octahedral Complexes
28.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.5K
Molecular Geometry and Dipole Moments
13.6K
The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:
13.6K
EDTA: Conditional Formation Constant
2.6K
Each EDTA molecule has six binding sites: four carboxyl groups and two amino groups. The fully protonated form of EDTA is represented as H6Y2+. However, it can exist in different forms, H5Y+, H4Y, H3Y−, H2Y2−, and HY3−, depending on the pH of the solution. In very basic solutions with pH > 10.17, the fully deprotonated form, Y4−, is the predominant species that readily complexes with metal ions in a 1:1 ratio.
For the equilibrium reaction of the metal with the...
For the equilibrium reaction of the metal with the...
2.6K
Generalized Hooke's Law
3.3K
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
3.3K
Conservation of Mass in Fixed, Nondeforming Control Volume
1.4K
The principle of conservation of mass is fundamental in fluid dynamics and is crucial for analyzing flow within fixed control volumes, such as pipes or ducts. This principle states that the total mass within a control volume remains constant unless altered by the inflow or outflow of mass through the control surfaces. This results in a vital relationship for steady, incompressible flow where the mass entering a system equals the mass leaving it.
In the case of a sewer pipe, which can be modeled...
In the case of a sewer pipe, which can be modeled...
1.4K


