Scientists Uncover Secret Sugar Shield on Immune Cells as Primary Driver of Psoriasis Inflammation

Scientists find immune cells shed a sugar layer to cause psoriasis. Discover how this glycocalyx discovery could lead to new therapies for chronic inflammation.

By: AXL Media

Published: Feb 26, 2026, 6:09 AM EST

Source: The information in this article was sourced from Lancaster University

Rewriting the Mechanics of Cellular Migration

A collaborative study led by Lancaster University and the University of Manchester has unveiled a previously hidden mechanism that dictates how immune cells infiltrate the skin to cause psoriasis. For decades, the scientific consensus held that the "gates" of the blood vessel walls were primarily responsible for allowing or blocking immune cells from entering surrounding tissue. However, this new research reveals that immune cells are not passive travelers; instead, they carry a dense, sugary outer layer called the glycocalyx that they must actively modify to facilitate their own movement into inflamed areas.

The Glycocalyx: A Sugary Gatekeeper

The glycocalyx is a complex, gel-like coating composed of sugar molecules known as glycans, specifically heparan sulfate in this context. While it was well-known that the lining of blood vessels possessed this shield to protect against physical stress, the discovery of a functional glycocalyx on the immune cells (leukocytes) themselves changes the tactical map of immunology. In a healthy state, this sugar layer acts as a buffer; however, during a psoriasis-like inflammatory response, the cells begin "shedding" this coating. This stripping process is a prerequisite for the cells to grip the vessel wall and squeeze through into the skin.

Fueling the Fire of Chronic Psoriasis

In the context of psoriasis, this biological process becomes a liability. The shedding of the glycocalyx allows an excessive number of immune cells to storm the skin tissue, leading to the characteristic red, scaly patches and chronic inflammation associated with the disease. Dr. Amy Saunders noted that understanding how important this layer is on the immune cells themselves could redefine how clinicians approach the "over-recruitment" of these cells. By identifying the specific sugars involved, researchers have found the literal "handle" that immune cells use to exit the bloodstream and enter the site of the disease.