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Serum growth hormone binding protein (GHBP) and insulin-like growth factor binding protein (IGFBP)]
Authors:N Hizuka
Affiliation:Department of Medicine, Tokyo Women's Medical College.
Abstract:Insulin--like growth factors bind to specific binding proteins (IGFBPs) in serum and tissues. At present, six different IGFBPs have been characterized. Recent studies suggest that IGFBPs act as a reservoir for IGFs but also modulate the bioavailability of IGFs. Binding protein for growth hormone (GH) in serum has been recognized recently. Interestingly, the high affinity GH binding protein (GHBP) is identical with the extracellular domain of GH receptor and is absent in patients with Laron-type dwarfism, suggesting that serum GHBP might serve as a marker for the GH receptor in tissue. In this short review, updated information on serum GHBP and IGFBP is presented.
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