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The Biological Bulletin, Vol 188, Issue 1 78-82, Copyright © 1995 by Marine Biological Laboratory

NEUROBIOLOGY AND BEHAVIOR

Taurine-like Immunoreactivity in the Motor Nerve Net of the Jellyfish Cyanea capillata

M. Carlberg, K. Alfredsson, S. O. Nielsen and PAV. Anderson
Department of Zoology, University of Lund, Helgonavagen 3, S-223 62 Lund, Sweden

Two antisera against the sulfonated amino acid taurine were applied to subumbrella tissue of the jellyfish Cyanea capillata. Taurine-immunoreactive nerve nets were found in both the ectoderm and endoderm. The ectoderm had two morphologically and immunocytochemically distinct populations of neurons, the motor nerve net (MNN), which was immunoreactive to the taurine-like molecule, and the diffuse nerve net (DNN), which was immunoreactive to the neuropeptide Phe-Met-Arg-Phe-NH2 (FMRFamide). In the endoderm, immunoreactivity was found in the endodermal DNN. This localization was confirmed by double-labeling experiments, which also revealed that the endodermal DNN neurons may contain both taurine and FMRFamide-related peptide. The presence of a taurine immunoreactivity in the MNN supports the hypothesis that taurine or some chemically related compound is the neurotransmitter at synapses within the MNN of Cyanea.




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Copyright © 1995 by the Marine Biological Laboratory.