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Journal of Histochemistry and Cytochemistry, Vol. 47, 1507-1512, December 1999, Copyright © 1999, The Histochemical Society, Inc.

RAPID COMMUNICATION

Expression Pattern of Glutamine Synthetase Marks Transition from Collecting into Conducting Hepatic Veins

Wouter H. Lamersa, Jacqueline L.M. Vermeulena, Theodorus B.M. Hakvoorta, and Antoon F.M. Moormana
a Department of Anatomy and Embryology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands

Correspondence to: Wouter H. Lamers, Dept. of Anatomy and Embryology, Academic Medical Centre, U. of Amsterdam, PO Box 22660, 1100 DD Amsterdam, The Netherlands.

The expression of glutamine synthetase (GS) is confined to a rim of hepatocytes surrounding the efferent hepatic veins in all mammalian species investigated. In rat liver, a two- to three-cell thick layer of GS-positive (GS+) hepatocytes uniformly surrounds the two to four terminal branching generations of the hepatic vein that collect blood from sinusoids (central veins). With increasing diameter of the efferent vessel, this multilayered rim of GS+ hepatocytes becomes confined to patches surrounding the decreasing number of central vein outlets. The remaining part of the wall of these sublobar hepatic veins is bordered by a one-cell thick layer of GS+ hepatocytes. Around still larger veins, this single-cell layer of GS+ hepatocytes gradually disappears. The expression pattern of GS is therefore a convenient biological parameter to delimit sinusoidal draining ("collecting") from nondraining ("conducting") surfaces in the wall of the efferent hepatic vessels. The hepatocytes surrounding a single tree of central veins together form a compound liver lobule. (J Histochem Cytochem 47:1507–1511, 1999)

Key Words: glutamine synthetase, hepatocytes, liver, sinusoids


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