A “death” protein may be the key to slowing aging at its source

As people get older, their blood and immune systems gradually lose strength. A major reason is the decline of hematopoietic stem cells (HSCs), which are responsible for producing all types of blood cells. Under healthy conditions, these stem cells can renew themselves and create a balanced mix of blood cells. Over time, however, they become less efficient. They generate fewer new cells, begin to favor certain types such as myeloid cells over lymphoid cells, and are less capable of ...