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IGF-1 is produced throughout life; the highest rates of IGF-1 production occur during the pubertal growth spurt. [12] The lowest levels occur in infancy and old age. [13] [14] Low IGF-1 levels are associated with cardiovascular disease, while high IGF-1 levels are associated with cancer. Mid-range IGF-1 levels are associated with the lowest ...
Reference ranges (reference intervals ... A reference range is usually defined as the set of values 95 percent of the normal population falls ... IGF-1 Female, 20 yrs ...
The IGF-1 receptor is the "physiological" receptor. IGF-1 binds to it at significantly higher affinity than it binds the insulin receptor. Like the insulin receptor, the IGF-1 receptor is a receptor tyrosine kinase—meaning the receptor signals by causing the addition of a phosphate molecule on particular tyrosines. The IGF-2 receptor only ...
A bone growth factor is a growth factor that stimulates the growth of bone tissue. [1] [2]Known bone growth factors include insulin-like growth factor-1 (IGF-1), insulin-like growth factor-2 (IGF-2), transforming growth factor beta (TGF-β), fibroblast growth factors (FGFs), platelet-derived growth factor (PDGF), parathyroid hormone-related peptide (PTHrP), bone morphogenetic proteins (BMPs ...
Insulin-like growth factor-1 (IGF-1) is an excellent test for evaluation of GH hyper-secretion. It does not undergo diurnal variation and will thus be consistently elevated in GH hyper-secretion and therefore patients with gigantism. A single normal IGF-1 value will reliably exclude GH hypersecretion. [17]
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GH also stimulates, through the JAK-STAT signaling pathway, [39] the production of insulin-like growth factor 1 (IGF-1, formerly known as somatomedin C), a hormone homologous to proinsulin. [40] The liver is a major target organ of GH for this process and is the principal site of IGF-1 production. IGF-1 has growth-stimulating effects on a wide ...
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