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Placental Alkaline Phosphatase Expression at the Apical and Basal Plasma Membrane in Term Villous Trophoblasts

Placental Alkaline Phosphatase Expression at the Apical and Basal Plasma Membrane in Term Villous... Human placental alkaline phosphatase (PLAP) was localized at the apical and basal plasma membrane of syncytiotrophoblasts and at the surface of cytotrophoblasts in term chorionic villi using immunoelectron microscopy. Similarly, apical and basolateral PLAP expression was found in polarized trophoblast-derived BeWo cells. Trophoblasts isolated from term placentas exhibited mainly vesicular PLAP immunofluorescence staining immediately after isolation. After in vitro differentiation into syncytia, PLAP plasma membrane expression was upregulated and exceeded that observed in mononuclear trophoblasts. These data call for caution in using PLAP as a morphological marker to differentiate syncytiotrophoblasts from cytotrophoblasts or as a marker enzyme for placental brush-border membranes. (J Histochem Cytochem 49:1155–1164, 2001) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Histochemistry & Cytochemistry SAGE

Placental Alkaline Phosphatase Expression at the Apical and Basal Plasma Membrane in Term Villous Trophoblasts

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References (43)

Publisher
SAGE
Copyright
© 2001 Authors
ISSN
0022-1554
eISSN
1551-5044
DOI
10.1177/002215540104900909
pmid
11511684
Publisher site
See Article on Publisher Site

Abstract

Human placental alkaline phosphatase (PLAP) was localized at the apical and basal plasma membrane of syncytiotrophoblasts and at the surface of cytotrophoblasts in term chorionic villi using immunoelectron microscopy. Similarly, apical and basolateral PLAP expression was found in polarized trophoblast-derived BeWo cells. Trophoblasts isolated from term placentas exhibited mainly vesicular PLAP immunofluorescence staining immediately after isolation. After in vitro differentiation into syncytia, PLAP plasma membrane expression was upregulated and exceeded that observed in mononuclear trophoblasts. These data call for caution in using PLAP as a morphological marker to differentiate syncytiotrophoblasts from cytotrophoblasts or as a marker enzyme for placental brush-border membranes. (J Histochem Cytochem 49:1155–1164, 2001)

Journal

Journal of Histochemistry & CytochemistrySAGE

Published: Sep 1, 2001

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