Natural killer cells have a memory

(University of Bonn) Researchers at the University of Bonn and the LMU Munich have decoded a new mechanism of how the immune system can attack pigmented cells of the skin. It was previously believed that natural killer cells did not have an immunological memory for the body's own tissues. However, the scientists have now showed that these special immune cells can indeed 'remember' pigmented cells when they come into more frequent contact with a specific contact allergen.