Clinical Chemistry
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Clinical Chemistry 38: 2300-2306, 1992;
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Clinical Chemistry, Vol 38, 2300-2306, Copyright © 1992 by American Association for Clinical Chemistry

Measurement of cyclosporine by liquid chromatography and three immunoassays in blood from liver, cardiac, and renal transplant recipients

JH McBride, SS Kim, DO Rodgerson, AF Reyes and MK Ota
Department of Pathology, UCLA School of Medicine 90024-1732.

In an effort to replace HPLC for whole-blood determination of cyclosporine (CsA), we compared HPLC with radioimmunoassay (RIA; INCSTAR, Cyclo-Trac SP assay), fluorescence polarization immunoassay (FPIA; Abbott TDx), and in-house modified enzyme-multiplied immunoassay technique (EMIT; Syva Co.). For blood samples from 200 various transplant recipients, RIA = 1.262 (HPLC) - 8.16, r = 0.983; FPIA = 1.200 (HPLC) + 19.90, r = 0.981; and EMIT = 1.038 (HPLC) + 11.28, r = 0.985. For segregation by transplant type, RIA, FPIA, and EMIT demonstrated positive biases of 27%, 12%, and 3%, respectively, for liver transplant recipients (n = 50) when compared with HPLC. Heart transplant recipients (n = 50) gave positive bias values of 23%, 14%, and 4% for RIA, FPIA, and EMIT, respectively. Adult renal transplant recipients (n = 50) demonstrated positive bias values of 30%, 31%, and 0% for RIA, FPIA, and EMIT, respectively. For pediatric renal transplant recipients (n = 50), positive biases of 40%, 31%, and 9% were obtained for RIA, FPIA, and EMIT, respectively. We conclude that the modified EMIT represents the best replacement for HPLC.


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 Clin. Chem.Home page
W. Steimer
Performance and Specificity of Monoclonal Immunoassays for Cyclosporine Monitoring: How Specific Is Specific?
Clin. Chem., March 1, 1999; 45(3): 371 - 381.
[Abstract] [Full Text] [PDF]

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E. Schutz, D. Svinarov, M. Shipkova, P.-D. Niedmann, V. W. Armstrong, E. Wieland, and M. Oellerich
Cyclosporin whole blood immunoassays (AxSYM, CEDIA, and Emit): a critical overview of performance characteristics and comparison with HPLC
Clin. Chem., October 1, 1998; 44(10): 2158 - 2164.
[Abstract] [Full Text] [PDF]


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