Abstract
Background: Liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) utilizing triple-quadrupole instruments has been widely used for quantification of endogenous compounds, drugs or metabolites in clinical laboratories. In contrast, high-resolution mass spectrometry (HRMS) is typically used for compound identification due to its limited dynamic range. Recently HRMS instruments with enhanced linear dynamic range have become available. The aim of this study was to evaluate HRMS for fast quantitative applications in a clinical laboratory.
Methods: A high throughput UPLC-TOF-MS assay for simultaneous quantification of cyclosporin A, tacrolimus, sirolimus and everolimus was developed. All immunosuppressants were analyzed as sodium adducts in TOF-only mode using an Agilent 6540 Q-TOF system. Extracted ion chromatograms of analytes and internal standards were created from full-scan data. The assay was evaluated and compared to an established LC-MS/MS assay according to CLSI recommendations.
Results: The novel HRMS assay has a total run time of 3 min. The assay is linear in a clinical relevant concentration range for all four immunosupressants. Method correlations vs. established LC-MS/MS assay were between R2=0.99 and R2=0.97. Total coefficients of variation (CVT) ranges were 4.5%–6.4% (tacrolimus), 7.4%–8.0% (sirolimus), 8.0%–8.8% (everolimus) and 6.1%–7.4% (cyclosporine A) for three relevant concentration levels each.
Conclusions: High resolution TOF-MS and LC-MS/MS show equivalent quantitative performance for monitoring of cyclosporin A, tacrolimus, sirolimus and everolimus. HRMS has the potential to replace conventional LC-MS/MS in clinical laboratories because it simplifies assay development (no optimization of fragmentations and product ions necessary) and its full-scan data can provide additional information.
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©2016 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- In Memoriam: Gérard Siest (1936–2016)
- Editorials
- Improving diagnosis and reducing diagnostic errors: the next frontier of laboratory medicine
- The quality indicator paradox
- Review
- Clinical utility of the (-2)proPSA and evaluation of the evidence: a systematic review
- Mini Review
- Why are clinical practice guidelines not followed?
- EFLM Position Paper
- Patient identification and tube labelling – a call for harmonisation
- Genetics and Molecular Diagnostics
- A fast and simple method for detecting and quantifying donor-derived cell-free DNA in sera of solid organ transplant recipients as a biomarker for graft function
- Performance of two commercially available BCR-ABL1 quantification assays that use an international reporting scale
- HAND1 loss-of-function mutation associated with familial dilated cardiomyopathy
- General Clinical Chemistry and Laboratory Medicine
- Performance criteria and quality indicators for the post-analytical phase
- Assessing the commutability of reference material formats for the harmonization of amyloid-β measurements
- Quantitative determination of four immunosuppressants by high resolution mass spectrometry (HRMS)
- Measurement of plasma vitamin K1 (phylloquinone) and K2 (menaquinones-4 and -7) using HPLC-tandem mass spectrometry
- Therapeutic drug monitoring of infliximab: performance evaluation of three commercial ELISA kits
- High level of oxysterols in neonatal cholestasis: a pitfall in analysis of biochemical markers for Niemann-Pick type C disease
- Reference Values and Biological Variations
- Reference intervals of plasma homoarginine from the German Gutenberg Health Study
- TSH and fT4 during pregnancy: an observational study and a review of the literature
- Cancer Diagnostics
- Mean corpuscular volume levels and all-cause and liver cancer mortality
- Cardiovascular Diseases
- Circulating endothelial-derived apoptotic microparticles and insulin resistance in non-diabetic patients with chronic heart failure
- Hematology and Coagulation
- Platelet aggregation in response to ADP is highly variable in normal donors and patients on anti-platelet medication
- Letters to the Editor
- EQA-derived metrics to assess overall instrument performance
- Misidentification in laboratory medicine and diagnostic process: a neglected problem calling for action
- Impact of the routine implementation of automated indirect immunofluorescence antinuclear antibody analysis: 1 year of experience
- The importance of angiogenic markers in the differential diagnosis of HELLP syndrome vs. non-HELLP thrombocytopenia
- Bisalbuminemia accompanying bisalbuminuria detected in capillary electrophoresis, not in gel electrophoresis
- Prognostic value of red blood cell distribution width in acute pancreatitis patients admitted to intensive care units: an analysis of a publicly accessible clinical database MIMIC II
- Differences in analytical and biological results between older and newer lots of a widely used irisin immunoassay question the validity of previous studies
- A diagnostic algorithm for the detection of inhibitors against coagulation Factor V
- Interference of anticoagulants on coagulation testing
- Congress Abstracts
- Swiss MedLab 2016 and 74th Annual Meeting of the Swiss Society of Microbiology SSM, Bern, 13–16 June 2016
Artikel in diesem Heft
- Frontmatter
- In Memoriam: Gérard Siest (1936–2016)
- Editorials
- Improving diagnosis and reducing diagnostic errors: the next frontier of laboratory medicine
- The quality indicator paradox
- Review
- Clinical utility of the (-2)proPSA and evaluation of the evidence: a systematic review
- Mini Review
- Why are clinical practice guidelines not followed?
- EFLM Position Paper
- Patient identification and tube labelling – a call for harmonisation
- Genetics and Molecular Diagnostics
- A fast and simple method for detecting and quantifying donor-derived cell-free DNA in sera of solid organ transplant recipients as a biomarker for graft function
- Performance of two commercially available BCR-ABL1 quantification assays that use an international reporting scale
- HAND1 loss-of-function mutation associated with familial dilated cardiomyopathy
- General Clinical Chemistry and Laboratory Medicine
- Performance criteria and quality indicators for the post-analytical phase
- Assessing the commutability of reference material formats for the harmonization of amyloid-β measurements
- Quantitative determination of four immunosuppressants by high resolution mass spectrometry (HRMS)
- Measurement of plasma vitamin K1 (phylloquinone) and K2 (menaquinones-4 and -7) using HPLC-tandem mass spectrometry
- Therapeutic drug monitoring of infliximab: performance evaluation of three commercial ELISA kits
- High level of oxysterols in neonatal cholestasis: a pitfall in analysis of biochemical markers for Niemann-Pick type C disease
- Reference Values and Biological Variations
- Reference intervals of plasma homoarginine from the German Gutenberg Health Study
- TSH and fT4 during pregnancy: an observational study and a review of the literature
- Cancer Diagnostics
- Mean corpuscular volume levels and all-cause and liver cancer mortality
- Cardiovascular Diseases
- Circulating endothelial-derived apoptotic microparticles and insulin resistance in non-diabetic patients with chronic heart failure
- Hematology and Coagulation
- Platelet aggregation in response to ADP is highly variable in normal donors and patients on anti-platelet medication
- Letters to the Editor
- EQA-derived metrics to assess overall instrument performance
- Misidentification in laboratory medicine and diagnostic process: a neglected problem calling for action
- Impact of the routine implementation of automated indirect immunofluorescence antinuclear antibody analysis: 1 year of experience
- The importance of angiogenic markers in the differential diagnosis of HELLP syndrome vs. non-HELLP thrombocytopenia
- Bisalbuminemia accompanying bisalbuminuria detected in capillary electrophoresis, not in gel electrophoresis
- Prognostic value of red blood cell distribution width in acute pancreatitis patients admitted to intensive care units: an analysis of a publicly accessible clinical database MIMIC II
- Differences in analytical and biological results between older and newer lots of a widely used irisin immunoassay question the validity of previous studies
- A diagnostic algorithm for the detection of inhibitors against coagulation Factor V
- Interference of anticoagulants on coagulation testing
- Congress Abstracts
- Swiss MedLab 2016 and 74th Annual Meeting of the Swiss Society of Microbiology SSM, Bern, 13–16 June 2016