Arginase activity in prostatic tissue of patients with benign prostatic hyperplasia and prostatic carcinoma

We studied arginase activity in human prostatic tissue in 15 patients with benign hyperplasia and 27 patients with prostatic carcinoma. Arginase specific activity is greater (p less than 0.0001) in prostatic carcinomas than in hyperplastic prostates. Arginase specific activity is correlated inversely (p less than 0.0001) with the histological grade of the tumor.