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Localization of3H-norepinephrine binding sites in the trout gill

✍ Scribed by Nekvasil, Nancy P. ;Olson, Kenneth R.

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
433 KB
Volume
235
Category
Article
ISSN
0022-104X

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✦ Synopsis

Tritiated norepinephrine (Nepi) or Epinephrine (Epi) was perfused through isolated gills of rainbow trout (Salmo gairdneri) and the affinity of vascular tissues for the amines examined by autoradiography. Pillar cells and certain endothelial cells in the filamental sinus accumulate 3H-Nepi extensively. The afferent and efferent filamental arteries and filamental nutrient vessels did not bind 3H-Nepi. Pillar cell and venous endothelial accumulation is selective for Nepi; Epi is not accumulated by these cells, and Nepi uptake can be inhibited by imipramine. These results suggest that pillar and venous endothelial cells are involved in regulation of plasma Nepi.

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