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  • Title: Somatostatin 14- and somatostatin 25-like peptides in pancreatic endocrine cells of Sparus aurata (teleost): a light and electron microscopic immunocytochemical study.
    Author: Abad ME, García Ayala A, Lozano MT, Agulleiro B.
    Journal: Gen Comp Endocrinol; 1992 Jun; 86(3):445-52. PubMed ID: 1383077.
    Abstract:
    An immunocytochemical investigation demonstrates the presence of somatostatin (SST) 14- and salmon somatostatin (sSST) 25-like peptides in two populations of somatostatin (D) cells in the islets of gilthead sea bream (Sparus aurata). Both cell types were identified by their differing immunoreactivities to the somatostatin antisera used. D1 cells in the islet periphery between glucagon cells showed sSST 25-like immunoreactivity and contained large moderate to low electron-dense granules. D2 cells, present only in the central region of the islets between insulin cells, were immunoreactive to the SST 14 antisera and had smaller electron-dense granules. In S. aurata, as in other teleosts, preprosomatostatin I and II are probably synthesized and processed to SST 14- and sSST 25-like peptides, respectively, in different D cell types.
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