Antibodies to trophoblast antigens HLA-G, placenta growth factor, and neuroD2 do not improve detection of circulating trophoblast cells in maternal blood.

Abstract:

OBJECTIVES:Non-invasive prenatal diagnosis using circulating fetal trophoblast cells has been challenging due to lack of a reproducible trophoblast-specific antibody. We investigated the use of three trophoblast cell-specific antibodies, HLA-G, placenta growth factor, and neuroD2, for the isolation of trophoblast cells from the maternal circulation. METHODS:Trophoblast cells were isolated by density centrifugation from maternal blood samples (gestational age 10-20 weeks, n = 9). All women were carrying a male fetus. Following immunocytochemical staining with the trophoblast-specific antibodies, fluorescent in situ hybridization was performed, to verify whether any stained cells were indeed fetal. RESULTS:The HLA-G antibody had a ubiquitous staining pattern, which was not specific for trophoblast cells. Neither the placenta growth factor nor the neuroD2 antibodies were able to identify any trophoblast cells. Following fluorescent in situ hybridization, no male cells were detected on any of the slides. CONCLUSION:The antibodies used in this study were unable to improve detection of trophoblast cells in the maternal circulation.

journal_name

Fetal Diagn Ther

authors

Tjoa ML,Delli-Bovi L,Johnson KL,Bianchi DW

doi

10.1159/000097102

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

85-9

issue

2

eissn

1015-3837

issn

1421-9964

pii

97102

journal_volume

22

pub_type

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