title: Circadian and day-to-day variation of prostatic acid phosphatase.
abstract: The circadian and day-to-day variation of serum levels of prostatic acid phosphatase determined by radioimmunoassay was investigated in 10 men with a normal prostate, 8 with benign prostatic hyperplasia and 10 with prostate cancer. Serum samples were obtained on 1 day at 8 a.m., 12:00 noon and 4:30 pm. in 23 patients, and on 3 consecutive days at 8 a.m. in an additional 5 patients. There was a variability in enzyme level throughout the day but without any distinct pattern. Prostate cancer patients with elevated levels of prostatic acid phosphatase did demonstrate a greater variability throughout the day than patients with a normal prostate or with benign prostatic hyperplasia. The day-to-day serum prostatic acid phosphatase in patients with a normal prostate varied little and remained within the normal range.
mesh_terms: D000135:Acid Phosphatase / Q000097:blood*; D000368:Aged; D002940:Circadian Rhythm; D006801:Humans; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000201:enzymology*; D011470:Prostatic Hyperplasia / Q000201:enzymology; D011471:Prostatic Neoplasms / Q000201:enzymology; D011863:Radioimmunoassay; D013997:Time Factors
chemical_list: D000135:Acid Phosphatase