General description

Prostate-Specific Antigen (PSA) is a 33 kDa protein primarily produced by the prostatic epithelium and the epithelial lining of the periurethral glands . PSA is strongly expressed in both normal and neoplastic prostatic tissue. Although PSA can be considered prostate-specific, PSA and/or PSA gene expression has been detected at low levels in some extra-prostatic tissues such as normal breast tissue, breast tumors, endometrium, adrenal neoplasms and renal cell carcinomas. Anti-PSA is most useful in determining the prostatic origin of carcinomas in non-prostate tissues (metastatic disease) using IHC techniques. This product is best used in conjunction with a panel of antibodies as, up to 27% of prostate carcinoma cases (predominantly poorly differentiated carcinomas) can be negative for this marker.

Legal Information

Cell Marque is a trademark of Sigma-Aldrich Co. LLC

Linkage

PSA Positive Control Slides, Product No. 324S, are available for immunohistochemistry (formalin-fixed, paraffin-embedded sections).

Other Notes

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Physical form

Solution in Tris Buffer, pH 7.3-7.7, with 1% BSA and ﹤0.1% Sodium Azide

Preparation Note

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Quality