Evaluation of three commercially available ELISA kits for the determination of chromogranin A.
J Immunoassay Immunochem
; 42(2): 95-105, 2021 Mar 04.
Article
en En
| MEDLINE
| ID: mdl-33043835
ABSTRACT
Chromogranin A (CgA) is currently the most valuable tumor biomarker for diagnostic work-up, management and follow-up of neuro-endocrine tumors (NET). The aim of our study was to compare three different commercially available CgA ELISA kits and to evaluate their analytical and clinical performance. CgA was measured with three different commercial ELISA kits on leftover sera from 40 patients Chromoa R assay (Cis), Hu chromogranin A ELISA (Dia), and Neolisa chromogranin A (Euro). Analytical and clinical performance was evaluated by measuring precision, area under the ROC curve, sensitivity, specificity, positive and negative predictive value, correlation coefficients and Passing and Bablok regression analyses. Precision (CV%) was acceptable for all evaluated ELISA's (Cis 10.3%; Dia 9.8%; Euro 14.5%). The area under the curve (AUC) was comparable between the three assays (Cis 0.693; Dia 0.627; Euro 0.721). Sensitivity varied between 41.2% and 64.7%. Specificity ranged between 69.6% and 82.6%. Pairwise comparison revealed significant systematic and proportional differences when comparing Cis versus Dia (Cis = 25.30 + 1.94 Dia) and Euro versus Dia (Euro = 26.54 + 1.92 Dia). Analytical and clinical performance was comparable for the three ELISA's. CgA results obtained with different ELISA's are not interchangeable.AbbreviationsCgA Chromogranin A; ELISA Enzyme-linked immunosorbent assay; IRMA Immunoradiometric assay; NET Neuroendocrine tumors; PPI Proton-pump inhibitors; RIA Radioimmunoassay.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Juego de Reactivos para Diagnóstico
/
Ensayo de Inmunoadsorción Enzimática
/
Cromogranina A
Tipo de estudio:
Evaluation_studies
/
Prognostic_studies
Límite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Immunoassay Immunochem
Asunto de la revista:
ALERGIA E IMUNOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Bélgica