Journal
AMERICAN JOURNAL OF REPRODUCTIVE IMMUNOLOGY
Volume 76, Issue 4, Pages 280-284Publisher
WILEY
DOI: 10.1111/aji.12556
Keywords
cord blood; immunosuppression; neonates; parturition; placenta; pregnancy
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Funding
- Perinatology Research Branch, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services (NICHD/NIH/DHHS)
- NICHD/NIH/DHHS [HHSN275201300006C]
- Wayne State University Perinatal Initiative in Maternal, Perinatal and Child Health
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Problem: Preterm neonates are highly susceptible to infection. Neonatal host defense against infection seems to be maintained by the temporal presence of immunosuppressive CD71+ erythroid cells. The aim of this study was to investigate whether umbilical cord CD71+ erythroid cells are reduced in neonates born to women who undergo spontaneous preterm labor/birth. Method of study: Umbilical cord blood samples (n=155) were collected from neonates born to women who delivered preterm with (n=39) and without (n=12) spontaneous labor or at term with (n=82) and without (n=22) spontaneous labor. Time-matched maternal peripheral blood samples were also included (n=111). Mononuclear cells were isolated from these samples, and CD71+ erythroid cells were identified and quantified as CD3-CD235a+ CD71+ cells by flow cytometry. Results: (i) The proportion of CD71+ erythroid cells was 50-fold higher in cord blood than in maternal blood; (ii) a reduced number and frequency of umbilical cord CD71+ erythroid cells were found in neonates born to women who underwent spontaneous preterm labor compared to those born to women who delivered preterm without labor; (iii) umbilical cord CD71+ erythroid cells were fewer in neonates born to term pregnancies, regardless of the process of labor, than in those born to women who delivered preterm without labor; and (iv) no differences were seen in umbilical cord CD71+ erythroid cells between neonates born to women who -underwent spontaneous preterm labor and those born to women who delivered at term with labor. Conclusion: Umbilical cord CD71+ erythroid cells are reduced in neonates born to women who had undergone spontaneous preterm labor.
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