The name (IL) followed by a number (for example IL-l or IL-2) was coined in an attempt to develop a standardized nomenclature for molecules secreted by, and acting on, leukocytes.
IL-1: It is an acute phase reactant synthesized by macrophages contributing to the acute inflammatory response, including fever, leukocyte recruitment, adhesion molecule activation, and stimulation of further chemokine production.
Mnemonic: One makes you burn like the sun.
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Posted by IfuM