Crossing the line: How aggressive cells invade the brain
In diseases such as multiple sclerosis, cells of the immune system infiltrate the brain tissue, where they cause immense damage. For many years, it was an enigma as to how these cells can escape from the bloodstream. This is no trivial feat, given that specialised blood vessels act as a barrier between the nervous system and the bloodstream. Until now, tissue sections provided the sole evidence that the immune cells really do manage to reach the nerve cells. Now, a team of scientists from the Max Planck Institute of Neurobiology, the University Medical Centre Goettingen, and other institutes, has witnessed the movements of these cells 'live' under the microscope for the very first time. In the process, they discovered several new behavioural traits of the immune cells. The consolidated findings mark a significant step forward in our understanding of this complex disease...