Japanese researchers have found special immune cells in the blood of people over 110 years old, which may reveal the relationship between immunity and aging and prolong their healthy life. The researchers compared the immune cells in the blood of 7 people over 110 years old and 5 people between 50 and 80 years old, and found the special immune cells “CD4 positive killer T cells”.
This immune cell has the properties of the molecules needed to kill cancer cells, etc. Almost all of these immune cell surfaces contain proteins that can be combined with specific antigens, called receptors.
The team believes that cd4-positive killer T cells proliferate when the receptor binds to a specific antigen.