Cell junctions in the epithelium of Bowman's capsule |
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Authors: | R Taugner U Boll P Zahn Prof Dr W G Forssmann III |
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Institution: | (1) Institutes of Physiology I and Anatomy III, University of Heidelberg, Germany;(2) Anatomisches Institut der Universität, Im Neuenheimer Feld 307, 6900 Heidelberg 1, Federal Republic of Germany |
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Abstract: | Summary The intercellular connections between the epithelial cells of Bowman's capsule were investigated. It could be demonstrated that typical zonulae occludentes (tight junctions) are present in the species (rat, hamster, and Tupaia) studied. Freeze-fracturing shows a network of anastomizing strands; some species variations are described. In the rat two strands are common. In the golden hamster mostly two to four and occasionally five strands occur. In Tupaia regularly three tight junction strands are found and also gap junctions associated with the zonulae occludentes. In thin sections the goniometric analysis confirms the freeze-fracturing results and reveals attachment zones of macular shape, which are classified as intermediate junctions and desmosomes. The functional role of these cell junctions observed in the epithelium of Bowman's capsule is discussed. |
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Keywords: | Kidney Bowman's capsule Zonulae occludentes Gap junctions Freeze-fracturing Ultrastructure |
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