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  • Title: Immunocytochemical evidence for the presence of a mutant vasopressin precursor in the supraoptic nucleus of the homozygous Brattleboro rat.
    Author: Guldenaar SE, Nahke P, Pickering BT.
    Journal: Cell Tissue Res; 1986; 244(2):431-6. PubMed ID: 3719667.
    Abstract:
    CP-14, a tetradecapeptide from the predicted mutant vasopressin precursor in the homozygous Brattleboro rat was detected immunocytochemically in the supraoptic nucleus of homozygous Brattleboro but not normal rats. The staining was localized to the periphery of the perikarya. CP-14 immunoreactivity was not found in the neural lobes, paraventricular nuclei, accessory nuclei or suprachiasmatic nuclei of either homozygous Brattleboro or normal rats. Vasopressin immunoreactivity was found in the neural lobe and in the perinuclear region of neurons of the supraoptic, paraventricular, suprachiasmatic and accessory nuclei of normal rats. Vasopressin immunoreactivity was also found in homozygous Brattleboro rats, mainly in the ventral part of the supraoptic nucleus: densely stained solitary cells were found amongst other faintly stained perikarya. In both cell-types the staining was mainly in the periphery of the perikarya. No vasopressin immunoreactivity was detected in the paraventricular nuclei, suprachiasmatic nuclei, accessory nuclei or neural lobe of homozygous Brattleboro rats. CP-14 and vasopressin immunoreactivities were found to be co-localized; both were present in the periphery of the same perikarya of the supraoptic nuclei of homozygous Brattleboro rats. Differential staining was found with antioxytocin serum in both normal rats and homozygous Brattleboro rats: separate neurons were stained for either oxytocin or vasopressin and CP-14. Immunoreactive oxytocin was found mainly in the perinuclear region of the neurons from the supraoptic, paraventricular and accessory nuclei.
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