Complex of human kallikrein 2 (hK2) and protease inhibitor-6 (PI-6) in prostate tumor tissue and methods of using the complex and its constituents
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United States of America Patent
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Oct 29, 2002
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Sep 22, 2000
filing date -
Mar 12, 1999
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Abstract
The present invention provides a novel complex of hK2 and PI-6 and methods of using the novel complex and its constituents. The novel complexes of hK2 and PI-6 of the present invention and the PI-6 exist at an elevated level in prostate cancer tissues. PI-6 also exists at an elevated level in other types of cancer cells. Therefore, the hK2-PI6 complexes and PI-6 of the present invention may be used as a serum marker for detecting cancers, particularly prostate cancer. They may also be used as an immunohistological marker to detect prostate cancer tissues. In accordance with the present invention, the hK2-PI6 complexes of the present invention may be detected in patient tissue samples by immunohistochemical and/or in patient fluid samples by in vitro immunoassay procedures. Diagnostic methods for detecting the existence of prostate cancer is also provided.
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