Novel tumor antigen useful in diagnosis and therapy of bladder, ovary, lung and kidney cancers

摘要

Compositions for the diagnosis and therapy of bladder, lung, ovary, and kidney cancer, derived from or based on a normally prostate-specific, androgen-regulated, cell membrane associated an secreted serine protease termed 20P1F12/TM-PRSS2 are described. A full length cDNA comprising the entire coding sequence of the 20P1F12/TM-PRSS2 gene (also designated 20P1F12-GTC1 herein) is provided (Figure 1). Among the compositions provided are antibodies that bind to 20P1F12/TM-PRSS2 proteins and polypeptide fragments thereof, including antibodies labeled with a detectable marker or toxin or therapeutic composition. The invention also provides prognostic and diagnostic methods of examining a biological sample for evidence of disregulated cellular growth by comparing the status of 20P1F12/TM-PRSS2 in a corresponding normal sample, wherein alterations in the status of 20P1F12/TM-PRSS2 in the biological are associated with disregulated cellular growth. The invention further provides various therapeutic compositions and strategies for treating bladder, lung, ovary, and kidney cancer, including particularly, 20P1F12/TM-PRSS2 antibody therapy methods and compositions, cancer vaccines, and small molecule therapy.