cytokine
UK[ˈsaɪ.təʊ.kaɪn]US[ˈsaɪ.t̬oʊ.kaɪn]
n
A type of protein secreted by cells of the immune system which acts as a chemical messenger to regulate immune responses and inflammation.
Morpheme Breakdown
cyto
kine
cyto
cell
kine
movement
Etymology
The term "cytokine" is a modern scientific coinage, constructed from Greek roots to precisely describe its function. The first element, "cyto-," derives from the Greek word for a container or cell, reflecting the biological unit that produces these substances. The second element, "-kine," originates from the Greek concept of motion or stirring, metaphorically capturing the role of these proteins as mobile signaling molecules that stimulate and direct cellular activity. Thus, the word's literal meaning, "cell movement," elegantly conveys the abstract concept of proteins that are released by cells to instigate communication and action within the immune system.
Analysis
Structure: cyto (cell) + kine (movement)
- cyto: From Greek kytos (hollow vessel, cell). A combining form meaning "cell."
- kine: From Greek kinēsis (movement). A combining form meaning "movement" or "motion."
Examples
The release of pro-inflammatory cytokines is a key part of the body's response to infection.
Researchers are studying cytokine storms, an overreaction of the immune system, in severe cases of the disease.
Certain therapies work by blocking specific cytokines to reduce autoimmune inflammation.