An explanation of the noncorrespondence between assessment methods of cyclosporin |
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Authors: | G. M. Randleff-Rasmussen M. M. J. Oosthuizen J. A. Myburgh |
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Affiliation: | (1) Biochemistry Laboratory, Department of Surgery, University of the Witwatersrand Medical School, 7 York Road, Parktown, 2193 Johannesburg, South Africa |
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Abstract: | Various methods of determining cyclosporin (CyA) levels in patients after kidney transplantation were compared. These included polyclonal antibody (pcAb-), specific and nonspecific monoclonal antibody (S- and NmcAb-) radioimmunoassays (RIA), and high performance liquid chromatography (HPLC). The results obtained by the various methods when compared showed some correlation but did not correspond. A probable explanation for part of this noncorrespondence is the presence of monoclonally crossreactive metabolites (CyA-M). Another reason was that the concentration of CyA in the standards supplied with the RIA kits was found to be higher than stated. |
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Keywords: | Cyclosporin determination in kidney transplantation Cyclosporin determination radioimmunoassay, HPLC Radioimmunoassay of cyclosporin HPLC of cyclosporin |
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