Cartilage resorption assays measuring type II collagen fragments
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United States of America Patent
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Feb 19, 2002
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N/A
app pub date -
Aug 30, 1999
filing date -
Jun 19, 1998
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Abstract
Immunoassays for measuring type II collagen (cartilage) resorption in vivo employ either one or two antibodies. A first antibody binds to DEKAGGA (SEQ ID NO:21) but not to GGFDEKAGGAQLG (SEQ ID NO:27), where the K symbols refer to lysine or preferably to cross-linking 3-hydroxypyridinium residues. Measurement of analyte binding to the first antibody in serum provides an indication of unmineralized cartilage resorption in vivo. A second antibody binds to GGFDEKAGGAQLG but not to DEKAGGA. Measurement of analyte binding to the second antibody in serum provides an indication of mineralized cartilage resorption in vivo. An indication of total (unmineralized and mineralized) cartilage resorption in vivo is provided by either measurement of analyte binding to the first antibody in urine, or by measurement of the total analyte binding to the first and second antibodies in serum.
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