Different mRNA expression levels of CD97, CERU, CFAH, COCH, FINC, HPT, PLTP and P3 IP1 were detected and confirmed in diverse cell lines related to the urinary tract, including normal human embryonic renal cell line (HEK 293), human embryonal carcinoma cell line (NTERA-2), normal human renal proximal tubule epithelial cell line (RPTEC/TERT1), human hypertriploid renal carcinoma cells (786-O cells), human renal cell line (Caki-1), human bladder cancer cell line (RT4) and human prostate cancer cell line (PC-3). The gene discussed is COCH; the disease is prostate carcinoma.