UC Riverside Researchers Uncover Dual Role of Adgrl2 Protein in Brain Synapse and Vascular Development

UC Riverside study finds Adgrl2 protein guides both synapse formation and blood-brain barrier stability through specialized genetic editing.

By: AXL Media

Published: Apr 28, 2026, 9:24 AM EDT

Source: Information for this report was sourced from EurekAlert!

The Molecular Architecture of Neural and Vascular Networks

The intricate development of the human brain requires the simultaneous construction of communication pathways and life-support infrastructure. New research from the University of California, Riverside, highlights the Adgrl2 protein as a central player in this dual-track growth, acting as a guide for cells to recognize and bond with one another. While neurons utilize this protein to facilitate the formation of synapses, the endothelial cells lining the brain's blood vessels rely on it to ensure vascular stability. According to Garret R. Anderson, an assistant professor at UCR, this single protein manages two vastly different biological assignments depending on the specific cell type it inhabits.

Consequences of Protein Deficiency in Endothelial Cells

To understand the specific impact of Adgrl2 on the brain’s vascular system, researchers conducted experiments involving the targeted removal of the protein from the endothelial cells of mice. The results indicated a significant breakdown in the blood-brain barrier, a specialized unit designed to protect neurons from potentially harmful chemicals in the bloodstream. Without the presence of Adgrl2, the vessels became increasingly porous, losing their essential sealing properties. This discovery confirms that the protein is not merely a structural component but an active requirement for maintaining a healthy and secure vascular network within the central nervous system.

Genetic Customization Through Alternative Splicing

The ability of a single gene to produce a protein with such diverse functions is made possible through a biological editing process known as alternative splicing. The study found that although the underlying genetic instructions for Adgrl2 are identical across different cell types, neurons and blood vessel cells edit these instructions before they are translated into functional proteins. This allows each cell type to tailor a version of Adgrl2 that meets its specific structural needs. Anderson noted that this mechanism enables neurons to create one specialized version for signaling, while endothelial cells produce another for structural reinforcement.