Tissue Polypeptide Antigen and Tissue Polypeptide Specific Antigen in Primary Breast Cancer. Evaluation in Serum and Tutmour Tissue

Summary: Tissue polypeptide antigen, measured by both a polyclonal antibody (TPA IRMA Prolifigen®) and a monoclonal antibody prototype kit (TPA-M IRMA Prolifigen®), and the tissue polypeptide specific antigen were evaluated. The markers were measured in 266 serum samples and in 291 tumour cytosols from patients with primary breast cancer. The three markers were available in matched pairs of both serum and cytosol from the same patient in 144 cases. Diagnostic sensitivity of serum levels of the three markers was not significantly different when using cut-off values calculated on the basis of healthy subjects. In the cytosol, tissue polypeptide antigen (TPA IRMA), tissue polypeptide antigen (TPA-M IRMA) and tissue polypeptide specific antigen were significantly correlated with steroid receptor Status, while their serum levels were not. Cytosol and serum levels of the three markers were not significantly associated. All three were significantly correlated both in serum and in cytosol. The association was closer between tissue polypeptide antigen (TPA IRMA) and tissue polypeptide antigen (TPA-M IRMA) than between each of these two markers and tissue polypeptide specific antigen.