Ligand-mediated immunofunctional hormone binding protein assay method
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United States of America Patent
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Dec 4, 2001
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N/A
app pub date -
May 15, 1995
filing date -
Nov 19, 1990
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Expired
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Abstract
A ligand=mediated immunofunctional assay (LIFA) method for detecting the presence and the concentration of polypeptide hormone binding proteins which comprises capturing the binding protein with a solid phase bound first antibody, saturating the bound hormone binding protein with the ligand polypeptide hormone, and detecting the bound ligand polypeptide hormone with a detectably labeled second antibody specific for the ligand polypeptide hormone. In the absence of added saturating polypeptide hormone, the LIFA measures the amount of hormone binding protein bound in the endogenous ligand polypeptide hormone. A growth hormone binding protein assay illustrates the method of the present invention. LIFA assay results indicate that increased binding protein substantially increases growth hormone activity. Methods of use and formulation of growth hormone binding protein, growth hormone, insulin-like growth factor-1 and insulin-like growth factor binding protein are disclosed.
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