Related Experiment Video
Updated: Feb 6, 2026

11:26
Single-cell RNA-Seq of Defined Subsets of Retinal Ganglion Cells
Published on: May 22, 2017
14.4K
RNA velocity of single cells
Gioele La Manno1,2, Ruslan Soldatov3, Amit Zeisel1,2
1Laboratory of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.
Nature
|August 10, 2018
Summary
This study introduces RNA velocity, a method to predict future cell states by analyzing RNA molecules. This approach overcomes the limitations of static snapshots in single-cell RNA sequencing for dynamic biological processes.
Area of Science:
- Molecular Biology
- Genomics
- Developmental Biology
Background:
- Single-cell RNA sequencing provides high-resolution snapshots of cellular states.
- Analyzing dynamic biological processes like development requires understanding temporal changes in gene expression.
- Current methods capture static snapshots, limiting the study of time-resolved cellular dynamics.
Purpose of the Study:
- To develop a method for predicting future cell states from single-cell RNA sequencing data.
- To introduce RNA velocity as a novel metric for analyzing cellular dynamics.
- To overcome the limitations of static snapshots in studying time-resolved biological phenomena.
Main Methods:
- Distinguishing between unspliced and spliced messenger RNA (mRNA) in standard single-cell RNA sequencing protocols.
- Estimating RNA velocity, the time derivative of the gene expression state.
- Developing a high-dimensional vector to predict future cellular states on an hourly timescale.
Main Results:
- RNA velocity can be directly estimated by analyzing mRNA splicing dynamics.
- The method was validated in the neural crest lineage and applied to multiple datasets and platforms.
- RNA velocity revealed the branching lineage tree of the developing mouse hippocampus and transcription kinetics in the human embryonic brain.
Conclusions:
- RNA velocity enables prediction of future cell states, offering a dynamic view of cellular processes.
- This method enhances the analysis of developmental lineages and cellular dynamics, especially in human development.
- RNA velocity is a powerful tool for understanding time-resolved biological phenomena.
Related Concept Videos
Average Velocity
23.7K
To calculate the other physical quantities in kinematics, we must introduce the time variable. The time variable allows us not only to state the position of the object during its motion, but also how fast it is moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position xi, we assign a particular time ti. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity. This...
23.7K
Instantaneous Velocity - II
13.1K
Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
13.1K
Escape Velocity
8.4K
The escape velocity of an object is defined as the minimum initial velocity that it requires to escape the surface of another object to which it is gravitationally bound and never to return. For example, what would be the minimum velocity at which a satellite should be launched from the Earth's surface such that it just escapes the Earth's gravitational field?
To calculate the escape velocity, it is assumed that no energy is lost to any frictional forces. In practice, a satellite...
To calculate the escape velocity, it is assumed that no energy is lost to any frictional forces. In practice, a satellite...
8.4K
Velocity of an Object
207
Understanding how an object moves along a path requires distinguishing between motion over a time span and motion at a precise moment. A useful example is a vehicle traveling along a straight and level path, where its position at any given time is known. The initial step in analyzing this motion is to measure how far the vehicle travels over a fixed time period. This measurement, called average velocity, is computed by dividing the total change in position by the duration over which the change...
207
Velocity Potential
751
In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
751
Drift Velocity
5.6K
The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...
5.6K

