I3769
Insulin-like Growth Factor-I human
IGF-I, recombinant, expressed in E. coli, lyophilized powder, suitable for cell culture
Synonym(s):
IGF, IGF-I, somatomedin c
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About This Item
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biological source
human
Quality Level
recombinant
expressed in E. coli
Assay
≥95% (HPLC)
form
lyophilized powder
potency
0.1-10 ng/mL ED50/EC50
quality
endotoxin tested
mol wt
~7.6 kDa
packaging
pkg of 50 and 100 μg
technique(s)
cell culture | mammalian: suitable
impurities
≤1.00 EU/μg
UniProt accession no.
storage temp.
−20°C
Gene Information
human ... IGF1(3479) , Igf1(16000)
Related Categories
General description
Insulin-like growth factor I (IGF-I) is localized on human chromosome 12q23.2.
Application
Insulin-like Growth Factor-I human has been used:
- in modified Dulbecco minimal essential medium for in vitro culture of testicular cells
- in culture media, to study its effect on steroidogenesis during testicular development
- in culture media for in vitro assay of splenic pro-erythroid cell growth and differentiation
Biochem/physiol Actions
IGF-I also known as somatomedin C, is secreted from the liver into circulation in a process regulated by pituitary growth hormone (GH) and so it mediates the growth-promoting activity of GH. In the developing embryo IGF-I is expressed primarily by mesenchymal-derived cells. After birth IGF-I expression in most extrahepatic tissues declines and hepatic expression of IGF-I becomes GH-regulated. Expression of IGF-I outside the liver is regulated differently, depending on the specific tissues. For example, gonadotropins and sex steroids regulate IGF-I expression within the reproductive system, while parathyroid hormone and sex steroids regulate IGF-I expression in bone. IGF-I is produced in several human tumors. IGF-I is mitogenic for a variety of cells including fibroblasts, osteoblasts, smooth muscle cells, fetal brain cells, neuroglial cells, and erythroid progenitor cells. IGF-I exerts its actions exclusively through the IGF-I receptor (IGF-IR). IGF-I induces endothelial cell migration and is involved in the regulation of angiogenesis.
Insulin-like growth factor I (IGF-I) plays a critical role in cellular energy metabolism and growth and development, especially prenatal growth.
Physical form
Lyophilized from 0.2 μm filtered solution in 50 mM acetic acid.
Reconstitution
Reconstitute in water
Analysis Note
The biological activiy is calculated by the dose-dependent proliferation of murine BALBC/3T3 cells. ED50 corresponds to a specific activity of at least 1 x 105 units/mg.
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Product No.
Description
Pricing
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
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Insulin-like growth factor I (IGF-I) is a polypeptide hormone produced mainly by the liver in response to the endocrine GH stimulus, but it is also secreted by multiple tissues for autocrine/paracrine purposes. IGF-I is partly responsible for systemic GH activities
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Insulin-like Growth Factors (IGF)
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