Immune system has protective memory cells, researchers discover

The immune system possesses a type of cell that can be activated by tissues within the body to remind the immune system not to attack our own molecules, cells and organs. The discovery is likely to lead to new strategies for fighting a range of autoimmune diseases -- in which the immune system attacks and harms specific molecules and cells within us -- as well as for preventing transplant rejection, according to UCSF researchers who report their findings in the November 27 online edition of the journal Nature.
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