Researchers Discover Protein Molecular Switch That Directs Neuronal Migration During Critical Brain Development Stages

University of Barcelona researchers find that the Ten4 protein acts as a switch to guide neurons to their final positions during embryonic brain development.

By: AXL Media

Published: May 1, 2026, 6:41 AM EDT

Source: Information for this report was sourced from EurekAlert!

Identifying the Molecular Mechanisms of Embryonic Nerve Cell Movement

During the development of the embryonic brain, neurons must travel from their point of origin to precise final positions to establish functional neural circuits. This migration is a fundamental requirement for the formation of organized neuronal layers and synaptic connections. A new international study, published in Nature Communications, has identified the protein Teneurin 4, or Ten4, as a primary regulator of this movement. By acting as a molecular switch, Ten4 ensures that neurons reach their destinations, a process essential for healthy brain architecture.

The Role of Ten4 in Navigating Cellular Highways

To move through the developing brain, neurons utilize radial glial cells as structural highways, attaching and detaching from these fibers in a highly controlled manner. The research led by Professor Daniel del Toro of the University of Barcelona reveals that Ten4 manages these dynamics through mutually exclusive molecular pathways. Depending on the biological context, the protein determines whether a neuron adheres to its path or experiences repulsion, effectively steering the cell through the complex tissue environment of the growing cortex.

Mutually Exclusive Pathways for Adhesion and Repulsion

The functionality of the Ten4 switch depends on which molecules it interacts with during the migration process. Specifically, the protein can bind to molecules called latrophilins to promote adhesion, helping the neuron stay attached to the radial glial fibers. Conversely, when Ten4 binds to other Ten4 proteins, it reduces this adhesion, which allows the neuron to migrate at a faster pace. According to del Toro, these two programs are entirely opposing and cannot occur simultaneously, providing a precise steering mechanism for the traveling nerve cell.