Studies on the Juxtaglomerular Apparatus. V. The Juxtaglomerular Apparatus in Tupaia with Special Reference to Intercellular Contacts

Overview

Journal Cell Tissue Res

Specialties Anatomy & Histology
Cell Biology

Date 1977 Feb 15

PMID 402211

Citations 18

Authors

W G Forssmann

R TAUGNER

Affiliations

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Abstract

The vascular pole of the juxtaglomerular apparatus in Tupaia belangeri was studied with special reference to the intercellular contacts of the periendothelial cells and the endothelium of the vas afferens. The periendothelial cells of the vascular pole of the glomerulum are connected by numerous gap junctions; and the granulated epithelial cells are suggested to form a functional unit. Probably there is a continuity of this system throughout the entire vascular pole including (1) all granulated cells, (2) all lacis cells, (3) the mesangium cells and (4) the adjacent smooth muscle cells of the vas afferens and vas efferens. Analysis of the endothelial junctions shows a zonular arrangement of tight junctions indicating a rather tight blood-tissue barrier next to the glomerular vascular pole; The ultrastructure of the different cell types of the vas afferens is also described, emphasizing the granulated epithelial cells and their innervation.

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