Abstract
Gene products of the A disintegrin and metalloprotease (ADAM) family are critically involved in carcinogenesis and tumor progression of various solid tumors. Little is known about ADAM8 in prostate cancer. In our quest for novel diagnostic tissue markers of prostate cancer, we aimed to evaluate the expression of ADAM8 in prostate cancer and to correlate it with clinicopathological parameters. One hundred twenty-eight clinicopathologically characterized prostate cancer patients, with available follow-up data, were immunostained for ADAM8. Additionally, ADAM8 mRNA expression was quantified by real-time reverse transcription polymerase chain reaction (n = 59). ADAM8 protein expression was significantly associated with higher pT status, positive nodal status, and higher Gleason scores. Still, a significant prognostic value for the prostate-specific antigen relapse-free survival of ADAM8 could not be demonstrated. The differentiality of ADAM8 expression on protein and on mRNA level was low and partially inconclusive. Therefore, despite of its significant association with conventional parameters of an unfavorable prognosis, ADAM8 adds only limited information to the conventional histopathological assessment of prostate cancer.
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