NCIt definition : Bound to IGFBPs in the circulation, Insulin-Like Growth Factors (IGFs, Somatomedins)
are a family of extracellular signaling peptides (potential autocrine ligands) involved
in mediation of growth hormone action, stimulation of insulin action, and growth and
development. The three main somatomedins are Somatomedin C (IGF1), Somatomedin A (IGF2),
and Somatomedin B. Single chain IGFs I and II share about 47% amino acid homology
with insulin (INS) and 31% with relaxin.;
Alternative definition : NCI-GLOSS: A protein made by the body that stimulates the growth of many types of
cells. IGF is similar to insulin (a hormone made in the pancreas). There are two forms
of IGF called IGF-1 and IGF-2. Higher than normal levels of IGF-1 may increase the
risk of several types of cancer. IGF is a type of growth factor and a type of cytokine.;
Codes from synonyms : CDR0000653121; CDR0000653119; CDR0000653120;