European Journal of Pediatrics

, Volume 127, Issue 3, pp 197–204 | Cite as

Prenatal diagnosis of β-thalassemia using selective hemolysis of maternal cells contaminating fetal blood sample

  • M. Jensen
  • V. Zahn
  • K. H. Orend
Original Investigations

Abstract

The prenatal diagnosis of the severe, hereditary anemias may be impossible when a placental blood sample which contains a high percentage of maternal rather than fetal cells is obtained. An incubation system described by Boyer et al. [3] with minor modifications, was applied to mixtures of blood from prematures and adults in order to increase the proportion of premature cells. After 40 min incubation, 95% or more of adult red cells were destroyed, whereas 30–60% of premature red cells were recovered, as determined by several independent methods.

In a pregnancy at risk for β-thalassemia, a placental blood sample which was purely fetal was obtained. Complete lack of in vitro β-globin synthesis showed the fetus to have homozygous β-thalassemia. When fetal blood was mixed with maternal blood in a ratio of 1∶15, β-globin synthesis in the mixture was comparable to that of normal fetuses. In contrast, when the cell mixture was subjected to selective hemolysis prior to separation of globins, β-globin synthesis again was not detectable. Thus, using selective hemolysis, the correct diagnosis could be established from a blood sample containing only about 6% of fetal cells.

Key words

Prenatal diagnosis Thalassemia Selective hemolysis 

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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • M. Jensen
    • 1
  • V. Zahn
    • 2
  • K. H. Orend
  1. 1.KinderpoliklinikUniversity of MunichGermany
  2. 2.2nd Hospital for WomenUniversity of MunichGermany

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