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  • Title: Distribution of angiotensinogen immunoreactivity in rat anterior pituitary glands.
    Author: Deschepper CF, Ganong WF.
    Journal: Proc Soc Exp Biol Med; 1991 Jul; 197(3):304-9. PubMed ID: 2068124.
    Abstract:
    Angiotensin II (AII) has been previously shown to be localized in the gonadotropes of the rat anterior pituitary gland. Renin and angiotensin-converting enzyme, two enzymes that participate in the generation of AII, also have been shown to be present in gonadotropes. To determine whether angiotensinogen, the precursor to AII, is present in the same cells, we have stained rat anterior pituitary sections with an antirat angiotensinogen antiserum. Angiotensinogen staining was observed in cells that had a distinctive distribution at the periphery of the gland; the number of these cells and the intensity of the staining were increased in the pituitaries of rats that had been nephrectomized 24 hr before sacrifice. When double staining was performed, we never observed colocalization of angiotensinogen with any of the known pituitary hormones or with S100 protein. The results show that in the rat anterior pituitary gland, angiotensinogen is present, at least for the most part, in cells that are different from those containing renin, angiotensin-converting enzyme, and AII.
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