Research output: Contribution to Journal/Magazine › Journal article › peer-review
ULTRASTRUCTURAL DISTRIBUTION OF ENDOGENOUS IMMUNOGLOBULIN-G IN HUMAN TERM AMNIOCHORION. / BRIGHT, N A ; OCKLEFORD, C D .
In: Cell and Tissue Research, Vol. 281, No. 2, 08.1995, p. 367-374.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - ULTRASTRUCTURAL DISTRIBUTION OF ENDOGENOUS IMMUNOGLOBULIN-G IN HUMAN TERM AMNIOCHORION
AU - BRIGHT, N A
AU - OCKLEFORD, C D
PY - 1995/8
Y1 - 1995/8
N2 - Maternal immunoglobulin-G (IgG) is known to be transported across the placental syncytiotrophoblast during the period when the human fetus is incapable of manufacturing these defensive molecules. In this study we investigated the possible role of the amniochorion, that surrounds the amniotic cavity in which the fetus lies, in the transfer of immunoglobulin. Endogenous IgG was localised in the amniochorion by confocal immunofluorescence microscopy and by ultrastructural labelling of ultrathin frozen tissue sections using the protein A-gold technique. Immunoreactivity was identified in the extracellular matrix tissues and necrotic amniotic epithelial cells. Healthy amniotic epithelial cells and cytotrophoblast cells of the chorion laeve were devoid of endogenous IgG. These results suggest a possible nonspecific paracellular transport pathway between cytotrophoblast cells, which may conceivably contribute to the acquisition of passive immunity by the fetus, and offer a rational explanation for the presence of small quantities of maternal IgG in the amniotic fluid.
AB - Maternal immunoglobulin-G (IgG) is known to be transported across the placental syncytiotrophoblast during the period when the human fetus is incapable of manufacturing these defensive molecules. In this study we investigated the possible role of the amniochorion, that surrounds the amniotic cavity in which the fetus lies, in the transfer of immunoglobulin. Endogenous IgG was localised in the amniochorion by confocal immunofluorescence microscopy and by ultrastructural labelling of ultrathin frozen tissue sections using the protein A-gold technique. Immunoreactivity was identified in the extracellular matrix tissues and necrotic amniotic epithelial cells. Healthy amniotic epithelial cells and cytotrophoblast cells of the chorion laeve were devoid of endogenous IgG. These results suggest a possible nonspecific paracellular transport pathway between cytotrophoblast cells, which may conceivably contribute to the acquisition of passive immunity by the fetus, and offer a rational explanation for the presence of small quantities of maternal IgG in the amniotic fluid.
KW - PLACENTA
KW - AMNIOCHORION
KW - CYTOTROPHOBLAST CELLS
KW - IMMUNOGLOBULIN-G
KW - IMMUNOCYTOCHEMISTRY
KW - HUMAN
KW - ULTRATHIN FROZEN-SECTIONS
KW - PLACENTAL-TRANSFER
KW - IGG SUBCLASSES
U2 - 10.1007/BF00583405
DO - 10.1007/BF00583405
M3 - Journal article
VL - 281
SP - 367
EP - 374
JO - Cell and Tissue Research
JF - Cell and Tissue Research
SN - 0302-766X
IS - 2
ER -