Immunohistochemical Localization of Neuropeptides in the Cephalic Ganglion of the Land Crab <i>Chiromantes haematocheir</i>

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  • Immunohistochemical Localization of Neuropeptides in the Cephalic Ganglion of the Land Crab Chiromantes haematocheir
  • Immunohistochemical Localization of Neu

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Abstract

To determine the distribution of neuropeptide Y (NPY)-like immunoreactivity in the brain (cephalic ganglion) of the land crab Chiromantes haematocheir, an immunohistochemical study was carried out using the streptavidin-biotin technique, with special regard to a possible relationship with the molluscan cardioexcitatory tetra-peptide (FMRFamide), oxytocin, and urotensins I and II. NPY-like immunoreactivity was found to occur widely in the crab brain, including several cell groups in the protocerebrum and deutocerebrum, while NPY-positive fibers were seen in many portions of the neuropiles. In most of the NPY-positive cells, FMRFamide-like immunoreactivity was demonstrated, suggesting colocalization of both peptides. Although an immunopositive oxytocin-like substance was detected sporadically in the crab brain, no urotensins were detected. These results suggested that NPY-like peptide, in conjunction with FMRFamide-like peptide in the brain of C. haematocheir, functions as a neurotransmitter or neuromodulator during the process of integration.

Journal

  • Fisheries science

    Fisheries science 62 (6), 909-913, 1996

    The Japanese Society of Fisheries Science

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