It binds to lipopolysaccharides (LPSs) from Gram - negative bacteria and intestinal enterocytes, initiating a chain of events that alert the adaptive arm of the immune system. (journals.lww.com)
When the dendritic cells are activated, they train T cells — their allies in the adaptive arm of the immune system — to attack cancer cells anywhere in the body, whether at the site of the original tumor or distant metastases. (sciencedaily.com)
This 2 - decade - old idea, called the hygiene hypothesis, suggests that lack of exposure to dangerous parasites in childhood makes the adaptive arm of the immune system more likely to overreact when it comes into contact with benign allergens. (sciencemag.org)