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Comparison of different blood collection, sample matrix, and immunoassay methods in a prenatal screening setting.

ABSTRACT: We compared how measurements of pregnancy-associated plasma protein A (PAPP-A) and the free beta subunit of human chorionic gonadotropin (f?-hCG) in maternal blood are influenced by different methods for blood collection, sample matrix, and immunoassay platform. Serum and dried blood spots (DBS) were obtained by venipuncture and by finger prick of 19 pregnant women. PAPP-A and f?-hCG from serum and from DBS were measured by conventional indirect immunoassay on an AutoDELFIA platform and by antibody microarray. We compared methods based on the recoveries for both markers as well as marker levels correlations across samples. All method comparisons showed high correlations for both marker concentrations. Recovery levels of PAPP-A from DBS were 30% lower, while those of f?-hCG from DBS were 50% higher compared to conventional venipuncture serum. The recoveries were not affected by blood collection or immunoassay method. The high correlation coefficients for both markers indicate that DBS from finger prick can be used reliably in a prenatal screening setting, as a less costly and minimally invasive alternative for venipuncture serum, with great logistical advantages. Additionally, the use of antibody arrays will allow for extending the number of first trimester screening markers on maternal and fetal health.

SUBMITTER: Pennings JL

PROVIDER: S-EPMC4123521 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Comparison of different blood collection, sample matrix, and immunoassay methods in a prenatal screening setting.

Pennings Jeroen L A JL Siljee Jacqueline E JE Imholz Sandra S Kuc Sylwia S de Vries Annemieke A Schielen Peter C J I PC Rodenburg Wendy W

Disease markers 20140715

We compared how measurements of pregnancy-associated plasma protein A (PAPP-A) and the free beta subunit of human chorionic gonadotropin (fβ-hCG) in maternal blood are influenced by different methods for blood collection, sample matrix, and immunoassay platform. Serum and dried blood spots (DBS) were obtained by venipuncture and by finger prick of 19 pregnant women. PAPP-A and fβ-hCG from serum and from DBS were measured by conventional indirect immunoassay on an AutoDELFIA platform and by antib ...[more]

PMID: 25132703

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Dataset Information

Comparison of different blood collection, sample matrix, and immunoassay methods in a prenatal screening setting.

Publications

Comparison of different blood collection, sample matrix, and immunoassay methods in a prenatal screening setting.

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