Inability to detect fetal metaphases in flow-sorted lymphocyte cultures based on maternal-fetal HLA differences

Avirachan T. Tharapel*, Vikram L. Jaswaney, Michael E. Dockter, Stephen S. Wachtel, Robert W. Chandler, Joe Leigh Simpson, Lee P. Shulman, Carole M. Meyers, Sherman Elias

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Separation of fetal cells from maternal blood could provide a means for prenatal diagnosis that would not endanger the fetus. In this pursuit, we attempted cytogenetic analysis of candidate fetal cells flow sorted on the basis of parental HLA disparity. Metaphases showing 46.XY or aneuploidy and concordant with prenatal diagnostic studies (i.e., amniocentesis, chorionic villus sampling) would presumably be fetal in origin. Blood samples were obtained from 78 pregnant women and their partners. Among 18 HLA informative cases in which metaphases were recovered, 15 involved fetuses that were 46, XY or aneuploid. From these 15 cases, 2,483 metaphases were analyzed. All metaphases were 46, XX. Cytogenetic analysis of flow-sorted fetal cells thus probably will need to emphasize not metaphase analysis but in situ hybridization with chromosome-specific probes.

Original languageEnglish (US)
Pages (from-to)95-101
Number of pages7
JournalFetal Diagnosis and Therapy
Issue number2
StatePublished - 1993


  • Fetal cells in maternal circulation
  • Flow sorting
  • Lymphocyte chromosome analysis
  • Parental HLA differences

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Embryology
  • Radiology Nuclear Medicine and imaging
  • Obstetrics and Gynecology


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