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Co‐localization of the neonatal Fcγ receptor and IgG in human placental term syncytiotrophoblasts

Co‐localization of the neonatal Fcγ receptor and IgG in human placental term syncytiotrophoblasts Transfer of maternal IgG through the human placenta furnishes the newborn with passive immunity to a number of infectious agents. The exact mechanism of this transfer is still unknown, but it is agreed that it involves active receptor‐mediated transport. The neonatal Fc receptor is a major histocompatibility complex class I‐like receptor originally identified in the intestines of newborn rodents. A similar receptor has recently been detected in human placental syncytiotrophoblasts. Using multilabeling fluorescence immunohistochemistry and confocal laser scanning microscopy, we found that the neonatal Fc receptor co‐localizes with IgG and β2‐microglobulin in granules of human placental syncytiotrophoblast. The Fc receptor is not detected on syncytiotrophoblast apical plasma membrane. Localization to the outermost cellular barrier between the fetal and maternal blood further strengthens the role of the Fc receptor in transplacental transport of IgG. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Immunology Wiley

Co‐localization of the neonatal Fcγ receptor and IgG in human placental term syncytiotrophoblasts

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References (45)

Publisher
Wiley
Copyright
Copyright © 1996 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
0014-2980
eISSN
1521-4141
DOI
10.1002/eji.1830260741
pmid
8766579
Publisher site
See Article on Publisher Site

Abstract

Transfer of maternal IgG through the human placenta furnishes the newborn with passive immunity to a number of infectious agents. The exact mechanism of this transfer is still unknown, but it is agreed that it involves active receptor‐mediated transport. The neonatal Fc receptor is a major histocompatibility complex class I‐like receptor originally identified in the intestines of newborn rodents. A similar receptor has recently been detected in human placental syncytiotrophoblasts. Using multilabeling fluorescence immunohistochemistry and confocal laser scanning microscopy, we found that the neonatal Fc receptor co‐localizes with IgG and β2‐microglobulin in granules of human placental syncytiotrophoblast. The Fc receptor is not detected on syncytiotrophoblast apical plasma membrane. Localization to the outermost cellular barrier between the fetal and maternal blood further strengthens the role of the Fc receptor in transplacental transport of IgG.

Journal

European Journal of ImmunologyWiley

Published: Jul 1, 1996

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