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  • Title: The AT2 subtype of the angiotensin II receptors has differential sensitivity to dithiothreitol in specific brain nuclei of young rats.
    Author: Tsutsumi K, Zorad S, Saavedra JM.
    Journal: Eur J Pharmacol; 1992 Jun 05; 226(2):169-73. PubMed ID: 1639112.
    Abstract:
    We studied the effect of the sulfhydryl reducing agent dithiothreitol on the binding of the angiotensin II agonist [125I][Sar1]-angiotensin II to AT2 receptors in selected brain areas of young (2-week-old) rats. In the inferior olive and the hypoglossal nucleus, angiotensin II binding to AT2 receptors was insensitive to 5 mM dithiothreitol. Conversely, in the ventral and mediodorsal thalamic, medial geniculate, and oculomotor nuclei, the superior colliculus and the cerebellar cortex, incubation with 5 mM dithiothreitol significantly decreased angiotensin II binding to AT2 receptors to about 40% of control. These data suggest that brain AT2 receptors are heterogeneous with respect to their sensitivity to sulfhydryl reducing agents.
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