Novel fluoroimmunoassay for ovarian cancer biomarker CA-125

  • Davin Sok
  • Lisa-Jo A. Clarizia
  • Leslie R. Farris
  • Melisenda J. McDonald
Short Communication


Cancer antigen 125 (CA-125) is a glycoprotein biomarker that denotes the presence of ovarian and reproductive cancers in women, with serum concentrations of CA-125 greater than 35 U/ml considered indicative of potential malignancies. A fluorescent immunoassay recently developed in our laboratory employing the ALYGNSA antibody-orientation system has been used to measure CA-125 levels. This system displayed significantly increased sensitivity with a detection limit of 1.5 U/ml compared to that of a commercial CA-125 enzyme-linked immunosorbent assay (15 U/ml) This tenfold lower level of detection of the ALYGNSA CA-125 assay should permit better identification and monitoring of ovarian cancer.


Fluoroimmunoassay ELISA Cancer biomarker CA-125 



This work was supported by NSF grant # EEC-0425826 and a University of Massachusetts System-Wide CVIP award (MJM). One of us (DS) participated in the NSF Research Experience for Undergraduates (REU). Special thanks to Sinang Chourb and Brian Mackness for their useful discussions.


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Davin Sok
    • 1
  • Lisa-Jo A. Clarizia
    • 1
  • Leslie R. Farris
    • 1
  • Melisenda J. McDonald
    • 1
  1. 1.Biochemistry Program, Department of Chemistry, College of Arts and SciencesUniversity of MassachusettsLowellUSA

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