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Journal of Experimental Medicine, Vol 167, 213-218, Copyright © 1988 by Rockefeller University Press
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D Sahali, N Mulliez, F Chatelet, R Dupuis, P Ronco and P Verroust
Institut National de la Sante et de la Recherche Medicale, Unite 64, Paris, France.
Intermicrovillar areas and apical vesicles characterized by an extensive clathrin coat can be identified in some epithelial cell types. We describe a 280-kD protein, characteristic of these areas in the proximal tubule brush border and epithelial cells of the visceral yolk sac. When injected to 9-d pregnant rats, mAbs to the 280-kD protein regularly induced fetal resorption and/or malformations. Antibodies to a 330-kD protein that is also coated-pit-restricted had no effect. Our observations point to a key function for p280 and suggest that immunity to specific constituents of the receptor-mediated endocytotic system may be involved in the induction of fetal abnormalities.
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