Preanalytical considerations in therapeutic drug monitoring of immunosuppressants with dried blood spots.

Diagnosis
Adrian KlakPieter Vermeersch

Abstract

Background Dried blood spots (DBSs) could allow patients to prepare their own samples at home and send them to the laboratory for therapeutic drug monitoring (TDM) of immunosuppressants. The purpose of this review is to provide an overview of the current knowledge about the impact of DBS-related preanalytical factors on TDM of tacrolimus, sirolimus and everolimus. Content Blood spot volume, blood spot inhomogeneity, stability of analytes in DBS and hematocrit (Hct) effects are considered important DBS-related preanalytical factors. In addition, the influence of drying time has recently been identified as a noteworthy preanalytical factor. Tacrolimus is not significantly influenced by these factors. Sirolimus and everolimus are more prone to heat degradation and exhibited variations in recovery which were dependent on Hct and drying time. Summary and outlook DBS-related preanalytical factors can have a significant impact on TDM for immunosuppressants. Tacrolimus is not significantly influenced by the studied preanalytical factors and is a viable candidate for DBS sampling. For sirolimus and everolimus more validation of preanalytical factors is needed. In particular, drying conditions need to be examined further, as current prot...Continue Reading

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Citations

Feb 18, 2019·Diagnosis·Alexander von Meyer, Janne Cadamuro
Feb 20, 2020·Journal of Oncology Pharmacy Practice : Official Publication of the International Society of Oncology Pharmacy Practitioners·Geoffrey StrobbeGuillaume Marliot

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