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Related Experiment Videos

Clinical evaluation comparing AxSYM CA 15-3, IMx CA 15-3 and Truquant BRTM RIA

D M Lynch1, P E Rogers, J C Love

  • 1Diagnostics Division, Abbott Laboratories, Abbott Park, IL, USA.

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
|November 18, 1998
PubMed
Summary
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This study compared AxSYM CA 15-3, IMx CA 15-3, and Truquant BR RIA assays for breast cancer monitoring. All three assays demonstrated comparable trending results, indicating their utility in clinical practice.

Area of Science:

  • Clinical Chemistry
  • Immunoassays
  • Biomarker Analysis

Background:

  • CA 15-3 is a biomarker used in monitoring breast cancer.
  • Several immunoassay platforms exist for CA 15-3 detection, including AxSYM, IMx, and Truquant.

Purpose of the Study:

  • To compare the performance of AxSYM CA 15-3, IMx CA 15-3, and Truquant BR RIA assays.
  • To evaluate assay concordance, precision, and accuracy for breast cancer monitoring.

Main Methods:

  • Retrospective analysis of serum specimens from healthy volunteers and patients with benign and malignant diseases.
  • Linear regression and receiver operator characteristic (ROC) analyses were performed.
  • Serial dilution and replicate assays were used to assess precision and recovery.

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Main Results:

  • AxSYM and IMx CA 15-3 showed high correlation coefficients and comparable slopes to Truquant BR RIA across different concentration ranges.
  • ROC analyses indicated essentially equivalent areas under the curves for all three assays.
  • Concordance between AxSYM/IMx and Truquant was over 92%, with lower CVs and higher recoveries for AxSYM and IMx.

Conclusions:

  • Despite differences in absolute values, AxSYM CA 15-3, IMx CA 15-3, and Truquant BR RIA demonstrate comparable trending performance for serial monitoring of breast cancer patients.
  • These assays are suitable for clinical use in tracking disease progression or response to treatment.