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      Immunocytochemical Localization of the Gonadotropin-Releasing Hormone-Associated Peptide of the LHRH Precursor

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          Abstract

          Using specific rabbit anti-GAP (gonadotropin-releasing hormone-associated peptide) serum, we have immunocytochemically localized GAP in the rat brain. Immunostaining of neuronal perikarya, fibers and terminals was demonstrated with GAP antiserum under conditions of tissue preparation which make immunostaining with LHRH anti-sera difficult or undectectable. GAP-immunoreactive perikarya were observed in sections of perfused or nonperfused brains without colchicine pretreatment. Using a double immunoperoxidase staining method, both GAP and LHRH immunoreactivities were shown to coexist in the same neurons. The common distributionof LHRH and GAP immunoreactivity in the rat brain is strongly supportive of GAP representing the non-LHRH portion of the LHRH precursor. The use of GAP antisera that can distinguish between LHRH and the remaining portion of its prohormone represents a valuable tool for studies of LHRH-prohormone processing and distribution.

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          Author and article information

          Journal
          NEN
          Neuroendocrinology
          10.1159/issn.0028-3835
          Neuroendocrinology
          S. Karger AG
          0028-3835
          1423-0194
          1987
          1987
          02 April 2008
          : 45
          : 2
          : 172-175
          Affiliations
          aDepartment of Anatomy, School of Medicine, University of North Carolina, Chapel Hill, N.C., and bReproductive Neuroendocrinology Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, N.C., USA
          Article
          124720 Neuroendocrinology 1987;45:172–175
          10.1159/000124720
          3553979
          © 1987 S. Karger AG, Basel

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          Page count
          Pages: 4
          Categories
          Rapid Communication

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