Disagreement between the Roche Cobas Core and Hybritech TANDEM-E PSA assays when measuring free, complexed and total serum prostate specific antigen.

Abstract:

:A comparison of the Roche Cobas Core and Hybritech TANDEM-E PSA (prostate specific antigen) assays revealed a large difference in the reactivity of each assay to the separated free and complexed forms of serum PSA in patients with prostatic carcinoma. The Roche assay was relatively much more responsive to the free form, but the Hybritech assay was relatively more responsive to the complexed form and total serum PSA. It is possible that the adoption of a universal standard for PSA will not completely resolve the disagreement between PSA assay on individual patient samples, and the use of separate assays for the free and complexed forms may be necessary for the further clinical development of PSA as a tumour marker.

journal_name

Ann Clin Biochem

authors

Tillyer CR,Konings M,Gobin PT,Iqbal J

doi

10.1177/000456329403100514

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

501-5

eissn

0004-5632

issn

1758-1001

journal_volume

31 ( Pt 5)

pub_type

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