The antigen of bile canaliculi of the mouse hepatocyte: identification and ultrastructural localization |
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Authors: | N I Kuprina V N Baranov A K Yazova T D Rudinskaya M Escribano J Cordier A S Gleiberman A I Goussev |
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Institution: | (1) Laboratory of Immunochemistry, All-Union Cancer Research Center, Kashirskoye sh. 24, 115478 Moscow, USSR;(2) Laboratoire d'Immunochimie, Unite Cancer et Differenciation Cellulaire (ER 277 CNRS) I.R.S.C., B.P. 8, F-94802 Villejuif, France |
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Abstract: | Summary The AgB10 antigen of bile canaliculi of the mouse hepatocyte was identified using monoclonal antibodies. The Mr value of 116000 for AgB10 was measured by immunoblotting. The tissue localization of AgB10 was studied by light and electron
microscopy using the immunoperoxidase technique. AgB10 was predominantly present on the microvillus membrane of bile canaliculi,
the brush border of intestinal mucosa and apical surfaces of the epithelial cells in some other organs. A small amount of
AgB10 was detected on the basolateral domain of the hepatocytes. AgB10 was specific for hepatocytes and was not found in the
other cell types of the liver. In primary hepatocyte culture, AgB10 was localized on the surface of cells during the first
24 h, predominantly at the sites of cell-cell and cell-substratum contacts. After 48 h of culture AgB10 gradually disappeared
from contracting cell surfaces and became concentrated only in the reconstituted bile canaliculi. |
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