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The localization of converting enzyme in kidney vessels of the rat

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Summary

An antibody against pure rabbit lung converting enzyme (CE) showing cross-reaction with CE from other species was used for immunocytochemical studies in the kidney of rats. Using the indirect labelling PAP-technique, specific immunostaining was found in the endothelial layer of all arteries and arterioles of kidney cortex and in some descending vasa recta. CE-positive reactions were also seen in most glomeruli, the reaction product being confined to only a few capillary loops in connection with the glomerular stalk. A few immunstained capillaries in the cortical labyrinth were suspected to belong to the first ramifications of the efferent arteriole. The bulk of all other of the glomerular and peritubula capillaries as well as all veins of the kidney showed no obvious immunostaining. The functional significance of this specific localization pattern of CE in the endothelium of kidney vessels is discussed with respect to the actions of the systemic and the local, intrarenal reninangiotensin-system on kidney functions.

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Authors and Affiliations

  1. Institutes of Physiology and Pharmacology of the University of Heidelberg, Im Neuenheimer Feld 326, D-6900, Heidelberg, Federal Republic of Germany

    R. Taugner & D. Ganten

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  1. R. Taugner
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  2. D. Ganten
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Herrn Prof. Dr. A. Bohle zum 60. Geburtstag gewidmet

These studies were supported by the Deutsche Forschungsgemeinschaft within the SFB 90 “Cardiovasculäres System”

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Taugner, R., Ganten, D. The localization of converting enzyme in kidney vessels of the rat. Histochemistry 75, 191–201 (1982). https://doi.org/10.1007/BF00496010

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