Imaging of resident immune cells in the living mouse brain reveals that they are always in motion, continuously sending out processes and protuberances and reacting quickly to damage by sealing off the injured area. (science.sciencemag.org)
Looking for immune abnormalities throughout the lifespan of the mice, the group found that most immune system components stayed the same in number, but a type of brain - resident immune cells called microglia that are known first responders to infection begin to divide and change early in the disease. (sciencedaily.com)
They found that these skin - resident immune cells function as «first responders» to skin injuries in part by producing the molecule known as interleukin - 17A (IL - 17A), which wards off infection and promotes wound healing. (sciencedaily.com)