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  • Title: The alpha 1d-adrenoceptor subtype is involved in the noradrenaline-induced contractions of rat aorta.
    Author: Testa R, Destefani C, Guarneri L, Poggesi E, Simonazzi I, Taddei C, Leonardi A.
    Journal: Life Sci; 1995; 57(13):PL159-63. PubMed ID: 7674815.
    Abstract:
    The pA2 value of several alpha 1-adrenoceptor antagonists on noradrenaline-induced contractions of rat aorta, and their affinity for the cloned alpha 1a-, alpha 1b- and alpha 1d-adrenoceptor subtypes were evaluated. Selective or moderately selective alpha 1d-, partially selective alpha 1b-, selective alpha 1a- and non subtype-selective alpha 1-adrenoceptors antagonists were included in the study. The potency of these compounds on rat aorta was well correlated with the affinity observed for the alpha 1d-adrenoceptor subtype. A poor correlation was found for the alpha 1b- and alpha 1a-subtypes. These results suggest that the alpha 1d-subtype plays a determining role in rat aorta contractions induced by noradrenaline.
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