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  • Title: Localization of alpha 1-adrenoceptor in the rat kidney: in vitro autoradiography using [3H]-bunazosin.
    Author: Katayama E, Ogura T, Takatori K, Mitsui T, Yamamoto I, Ota Z, Ogawa N, Mizukawa K.
    Journal: Res Commun Chem Pathol Pharmacol; 1989 May; 64(2):205-13. PubMed ID: 2568008.
    Abstract:
    We studied the precise localization of alpha 1-adrenoceptor in the rat kidney using in vitro macro- and micro-autoradiography (ARG) of [3H]-bunazosin. The slide-mounted nonfixed frozen sections (10 micron) of kidney were incubated with [3H]-bunazosin (5 nM) at 24 degrees C for 45 min, and then applied to macro- and micro-ARG. The macro-ARG revealed that the bunazosin binding sites were present mainly in the rat renal cortex. These bindings were evaluated to be specific by means of computerized image analysis system (RAS 1,000) of ARG. Micro-autoradiogram showed that the tubules in the renal cortex had higher specific grain density than the glomeruli. These findings suggested that alpha 1-adrenoceptor in the rat kidney located mainly on the cortical tubules.
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