Method comparison of HPLC-ninhydrin-photometry and UHPLC-PITC-tandem mass spectrometry for serum amino acid analyses in patients with complex congenital heart disease and controls.
Metabolomics
; 16(12): 128, 2020 12 15.
Article
em En
| MEDLINE
| ID: mdl-33319318
ABSTRACT
INTRODUCTION:
Metabolomics studies are not routine when quantifying amino acids (AA) in congenital heart disease (CHD).OBJECTIVES:
Comparative analysis of 24 AA in serum by traditional high-performance liquid chromatography (HPLC) based on ion exchange and ninhydrin derivatisation followed by photometry (PM) with ultra-high-performance liquid chromatography and phenylisothiocyanate derivatisation followed by tandem mass spectrometry (TMS); interpretation of findings in CHD patients and controls.METHODS:
PM Sample analysis as above (total run time, ~ 119 min). TMS Sample analysis by AbsoluteIDQ® p180 kit assay (BIOCRATES Life Sciences AG, Innsbruck, Austria), which employs PITC derivatisation; separation of analytes on a Waters Acquity UHPLC BEH18 C18 reversed-phase column, using water and acetonitrile with 0.1% formic acid as the mobile phases; and quantification on a Triple-Stage Quadrupole tandem mass spectrometer (Thermo Fisher Scientific, Waltham, MA) with electrospray ionisation in the presence of internal standards (total run time, ~ 8 min). Calculation of coefficients of variation (CV) (for precision), intra- and interday accuracies, limits of detection (LOD), limits of quantification (LOQ), and mean concentrations.RESULTS:
Both methods yielded acceptable results with regard to precision (CV < 10% PM, < 20% TMS), accuracies (< 10% PM, < 34% TMS), LOD, and LOQ. For both Fontan patients and controls AA concentrations differed significantly between methods, but patterns yielded overall were parallel.CONCLUSION:
Serum AA concentrations differ with analytical methods but both methods are suitable for AA pattern recognition. TMS is a time-saving alternative to traditional PM under physiological conditions as well as in patients with CHD. TRIAL REGISTRATION NUMBER ClinicalTrials.gov Identifier NCT03886935, date of registration March 27th, 2019 (retrospectively registered).Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromatografia Líquida de Alta Pressão
/
Espectrometria de Massas em Tandem
/
Aminoácidos
/
Cardiopatias Congênitas
/
Ninidrina
Tipo de estudo:
Diagnostic_studies
/
Guideline
/
Observational_studies
/
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Metabolomics
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Áustria