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  • Title: Identification of the tridecapeptide dynorphin B (rimorphin) within perikarya of rat duodenum.
    Author: Wolter HJ.
    Journal: Life Sci; 1986 Aug 25; 39(8):727-30. PubMed ID: 2874472.
    Abstract:
    Using an immunofluorescence microscopic staining technique, the opioid peptide dynorphin B (rimorphin) was revealed within neuronal cell bodies of the rat duodenum. Dynorphin B immunoreactive perikarya were revealed in the myenteric and submucousal plexus as well as in the longitudinal muscle layer. They were large in diameter and round in shape and they contained a large round nucleus. Because no dynorphin B immunofluorescent nerve fibre and terminal could be noted it might be that dynorphin B is further cleaved by proteases into the bioactive opioid pentapeptide Leu-enkephalin and dynorphin B(6-13). These findings might also indicate that dynorphin B is processed within duodenal perikarya and that it has important physiological roles in the rat duodenum.
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