SCIENTISTS IDENTIFY NEW IMMUNE ORGAN IN SKULL BONE

Biologists at Washington University School of Medicine in St. Louis have identified a previously unknown immune organ located within skull bone marrow, according to research published in Nature. The organ appears to function as a "security station" to combat brain cancer in its early stages, the study reports. So far the structure has been found only in mice, though researchers indicate signs suggest humans possess similar structures. The discovery follows the team's previous identification of tiny channels running from brain tissue through the dura mater into the skull itself.

The human body maintains two distinct immune systems: one for the central nervous system, including the brain and spinal cord, and a separate one for the remainder of the body. Historically, these systems were thought to operate in complete isolation, as peripheral immune cells entering the brain can trigger neurodegenerative diseases through mechanisms incompatible with sensitive nervous tissue. Mounting evidence now suggests greater crossover occurs between the two systems than previously understood. Jonathan Kipnis, a brain immunologist at Washington University and senior author of the study, stated that "skull bone marrow is far more than just a structural framework – it harbours previously unrecognised hubs for brain-specific immune responses."

The discovery could reshape understanding of how the immune and nervous systems interact, researchers say. If these structures can be enhanced or "supercharged", they may offer new treatment options against deadly brain cancers and other neurological diseases. The findings open what Kipsis described as "exciting new avenues for treating brain tumours and other neurological diseases." Further research will be required to confirm whether humans possess equivalent immune organs and to explore potential therapeutic applications.