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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 mortality. A synthetic analog of IGF-1, mecasermin, is used for the treatment of growth failure in children with severe IGF-1 deficiency. [15]
IGF-1 has an involvement in regulating neural development including neurogenesis, myelination, synaptogenesis, and dendritic branching and neuroprotection after neuronal damage. Increased serum levels of IGF-I in children have been associated with higher IQ. [5] IGF-1 shapes the development of the cochlea through controlling apoptosis.
LS should be suspected in children or adults with distinctive physical features listed above, extremely elevated serum hGH concentrations despite low serum IGF-1 levels. [14] A failure of IGF-1 to increase in response to exogenous hGH (IGF-1 stimulation test) is diagnostic for LS. [14]
And because low levels of IGF-1 in those without the mutation have been linked in studies with a higher risk of cardiovascular disease, “everybody assumed that people with Laron probably had a ...
[9] [15] It may be appropriate in diagnosed adult-onset deficiency, where a weekly dose of approximately 25% of that given to children is given. Lower doses again are called for in the elderly to reduce the incidence of side effects and maintain age-dependent normal levels of IGF-1. [24]
IGF-1 has growth-stimulating effects on a wide variety of tissues. Additional IGF-1 is generated within target tissues, making it what appears to be both an endocrine and an autocrine/paracrine hormone. IGF-1 also has stimulatory effects on osteoblast and chondrocyte activity to promote bone growth. In addition to increasing height in children ...
Mecasermin, sold under the brand name Increlex, also known as recombinant human insulin-like growth factor-1 (rhIGF-1), is a recombinant form of human insulin-like growth factor 1 (IGF-I) which is used in the long-term treatment of growth failure and short stature in children with severe primary IGF-I deficiency, for instance due to growth hormone deficiency or Laron syndrome (growth hormone ...
The diagnosis of growth hormone deficiency is a multi-step procedure that involves pituitary MRI, biochemical testing (growth hormone stimulation tests and measurement of IGF-1/IGFBP3), clinical and auxological examination, and genetic test results. [8]
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