Erythropoietic suppression in fetal anemia because of Kell alloimmunization

Vaughan, J.I., Warwick, R., Letsky, E., Nicolini, U., Rodeck, C.H. and Fisk, N.M. (1994) Erythropoietic suppression in fetal anemia because of Kell alloimmunization. American Journal of Obstetrics and Gynecology, 171 1: 247-252.

Author Vaughan, J.I.
Warwick, R.
Letsky, E.
Nicolini, U.
Rodeck, C.H.
Fisk, N.M.
Title Erythropoietic suppression in fetal anemia because of Kell alloimmunization
Journal name American Journal of Obstetrics and Gynecology   Check publisher's open access policy
ISSN 0002-9378
Publication date 1994-07
Sub-type Article (original research)
Volume 171
Issue 1
Start page 247
End page 252
Total pages 6
Place of publication Philadelphia, PA, United States
Publisher Mosby Inc.
Language eng
Formatted abstract
Our purpose was to test the hypothesis that maternal anti-Kell alloimmunization produces fetal anemia by erythroid suppression.

Erythropoiesis in 11 anemic fetuses from maternal anti-Kell alloimmunization was compared with that in 11 fetuses where the mother was alloimmunized to RhD; each was matched for hematocrit, gestational age, hydrops, and perinatal outcome. Comparisons of the difference were performed by either paired t or Wilcoxon tests.

The anti-Kell group had reduced reticulocytosis (p = 0.007) and erythroblastosis (p = 0.045) and lower amniotic fluid bilirubin concentrations (p = 0.02) in comparison with the anti-D group. No correlation was found between hematocrit and reticulocytosis in the anti-Kell group, whereas the anti-D group had a significant linear relationship (r = 0.63, p < 0.05), indicating a progressive reticulocytosis in response to the degree of anemia.

These findings suggest that erythroid suppression, rather than hemolysis, is the predominant mechanism in producing fetal anemia related to maternal Kell alloimmunization. Fetal blood sampling is the investigation of choice in the evaluation of anemia related to maternal Kell alloimmunization, because reduced hemolysis means amniotic fluid bilirubin concentrations correlate poorly with anemia.
Keyword Kell alloimmunization
Fetal anemia
Lileys charts
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Health and Behavioural Sciences -- Publications
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