Cytokine

(noun. / SAI-toh-kine /)

By Sara Lowe

What does it mean?

Cytokines can be thought of as the body’s messengers. A cytokine is a type of protein that is secreted by a cell that needs help from another cell. For example, when your body is fighting an infection,  cells release cytokines to call immune cells to the site of infection. The cells receiving the cytokine signals will migrate to the signal’s origin to help clear the infection. 

The cell within the tissue detects the virus and releases cytokines to recruit nearby immune cells to the infected. Image is author’s own work.

Etymology 

The origin of the term “cytokine” can be broken into two Greek words. 

“Cyto” = cell 

“Kine” = to move

Related terms 

Subcategories of cytokines: Chemokines, Interferons, Interleukins 

Immune response 

Inflammation 

Infection 

Immunomodulating agents

Fields of study in which this word is commonly used

Immunology

Pathology

Physiology