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  • Title: Autoradiographic study on [3H]-[D-Ala2]-deltorphin-I binding sites in the rat brain.
    Author: Renda T, Negri L, Tooyama I, Casu C, Melchiorri P.
    Journal: Neuroreport; 1993 Sep 03; 4(10):1143-6. PubMed ID: 8219007.
    Abstract:
    Previous biochemical and pharmacological studies have shown that [D-Ala2]-deltorphin-I (DADTI) has a high affinity and selectivity for delta-opioid receptors. In this study, designed to provide morphological details, the distribution of DADTI binding sites was examined by autoradiography on coronal, sagittal and horizontal frozen sections of adult rat brain. The sections were incubated with tritiated DADTI solution and exposed for 12 weeks to a 3H-sensitive film. DADTI labelling clearly demonstrated selective and high affinity binding sites of delta-opioid type in several brain regions, including olfactory system, neostriatum, nucleus accumbens, and cortical layers I-II and V-VI.
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