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IGF-I is an anabolic growth factor essential for growth and development, both as a mediator of growth hormone (GH) action and as a local stimulator of cell proliferation and differentiation. Although the importance of IGF-I in postnatal growth has been studied for several decades, its functions in pathological states are not fully understood. The weaver (wv) mutant mouse is a commonly used model for...
Insulin-like growth factors (IGF-I and IGF-II) play a crucial role in regulating cell proliferation and differentiation. The IGFs have mitogenic and antiapoptotic effects on normal and transformed cells. These peptide growth factors are produced by virtually all tissues and act in an endocrine, autocrine, and paracrine fashion. The endocrine form of IGF-I originates mostly (75%) from the liver and...
Aging is associated with a significant decline in secretion of growth hormone. This in turn leads to reduced circulating IGF-I and changes in IGF-binding proteins. Growth hormone replacement to growth hormone-deficient individuals has been shown to improve quality of life, enhance bone and muscle mass, and reduce cardiovascular risk. However, studies with growth hormone therapy in the elderly have...
Human marrow was obtained as material discarded during total hip replacement and was established in culture with phenol red-free α-MEM with 10% fetal bovine serum (FBS) and antibiotics. Insulin-like growth factor I (IGF-I) and its binding proteins were secreted by human marrow cells, in amounts that increased with time in culture. Western ligand blotting showed that insulin-like growth factor binding...
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