Noninvasive detection of trophoblast protein signatures linked to early pregnancy loss using trophoblast retrieval and isolation from the cervix (TRIC)

Rani Fritz, Hamid Reza Kohan-Ghadr, Jay M. Bolnick, Alan D. Bolnick, Brian A. Kilburn, Michael Peter Diamond, Sascha Drewlo, D. Randall Armant

Research output: Contribution to journalArticle

10 Scopus citations


Objective To examine the expression pattern of biomarker proteins in extravillous trophoblast (EVT) cells obtained noninvasively by trophoblast retrieval and isolation from the cervix (TRIC) in patients with early pregnancy loss compared with control patients with uncomplicated term delivery. Design Case-control study. Setting Academic medical center. Patient(s) Women with either early pregnancy loss (EPL, n = 10) or an uncomplicated term delivery (N = 10). Intervention(s) Endocervical specimens obtained from ongoing pregnancies at gestational ages of 5-10 weeks to generate an archive of EVT cells isolated by TRIC, with medical records examined to select specimens matched for gestational age at the time of endocervical sampling. Main Outcome Measure(s) Known serum biomarkers for adverse pregnancy outcome that are expressed by EVT cells were evaluated by semiquantitative immunocytochemistry, using antibodies against endoglin (ENG), FMS-like tyrosine kinase-1 (FLT-1), α-fetoprotein (AFP), pregnancy-associated plasma protein-A (PAPP-A), galectin-13 (LGALS13), galectin-14 (LGALS14), and placental growth factor (PGF). Result(s) The EVT purity was over 95% in all specimens, based on chorionic gonadotropin expression; however, the number of EVT cells obtained was significantly lower in women with EPL than the control group. There was a statistically significant elevation of AFP, ENG, and FLT-1, and statistically significant reduction of PAPP-A, LGALS14, and PGF in the EPL group compared with controls. Conclusion(s) In this pilot study, EVT cells isolated by TRIC early in gestation exhibited altered protein expression patterns before an EPL compared with uncomplicated term pregnancies.

Original languageEnglish (US)
Pages (from-to)339-346.e4
JournalFertility and sterility
Issue number2
Publication statusPublished - Aug 1 2015



  • Early pregnancy loss
  • prenatal testing
  • trophoblast
  • uteroplacental insufficiency

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynecology

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