A substance produced by lymphocytes, such as interferon, that acts upon other cells of the immune system, e.g., by activating macrophages.
- Conversely, asthma is characterized by the presence of numerous inflammatory mediators, including leukotrienes, prostaglandins, histamine, eosinophilic basic proteins, and lymphokines.
- Cytokines that are secreted from lymphocytes are termed lymphokines, whereas those secreted by monocytes or macrophages are termed monokines.
- After contact with an antigen, T cells secrete lymphokines - a group of proteins that do not interact with the antigens themselves, instead they stimulate the activity of other cells.
1960s: from lympho- + Greek kinein 'to move'.
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