Name: total PSA Antibody (Clone HS-5)
Description and applications: PSA is an antigen present in prostatic tissue and in the majority of prostatic carcinomas. This antibody recognizes primary and metastatic prostatic neoplasms and rarely in tumors of nonprostatic origin. These include breast and a minority of salivary gland tumors. The antigen is a 33-34 kD glycoprotein that is restricted to epithelial cells of the prostate.
Because of the high specificity of PSA for prostate glandular epithelium, the antibody is useful to identify prostatic carcinomas of the prostate and their frequent infiltration of the surrounding organs (eg .: rectum and urinary bladder). Rectal adenocarcinomas, urothelial carcinoma or adenocarcinoma of the urinary bladder did not express PSA. The loss of immunoreactivity for PSA which can occur in poorly differentiated neoplasms cannot completely exclude the diagnosis of prostate cancer with a negative PSA. Another important use is for differential diagnosis and determine the origin of the primary tumor with metastases of unknown origin, especially lymph node and bone. PSA can be used together with the Prostein, which has at least the same sensitivity and is slightly more specific than PSA.
Composition: anti-human total PSA mouse monoclonal antibody purified from hybridoma cell culture by hydrophobic interaction chromatography using ammonium sulphate. Prepared in 10mM PBS, pH 7.4, with 0.2% BSA and 0.09% sodium azide.