Effect of Aging on NK Cell Population and Their Proliferation at Ex Vivo Culture Condition.

Age-associated changes in natural killer (NK) cell population, phenotype, and functions are directly attributed to the risk of several diseases and infections. It is predicted to be the major cause of the increase in mortality. Based on the surface density of CD56, NK cells are subdivided into two types, such as CD56 and CD56 cells, which represent cytokine production and cytotoxicity.