Summary
There is a giant serotonin-containing neurone (GSC) in each cerebral ganglion of Helix pomatia and Limax maximus. In Helix, presynaptic endings of the GSCs are located in the buccal ganglia and peripheral musculature. Dense-cored vesicles of mean diameter 100 nm were observed in the perikarya and the axon branches of the GSCs within the cerebral ganglia. Evidence is presented which suggests that these vesicles sequester serotonin. Vesicles with a similar appearance are present in the presumed presynaptic endings of the GSC in Helix. These endings selectively accumulate tritiated serotonin. Axonal processes containing agranular vesicles (mean diameter 50 nm), or granular vesicles (50–100 nm diameter), or both, make close contact with the fine axon branches of the GSCs within the cerebral ganglion neuropile. Some of these axon processes appear to be presynaptic endings making synaptic connections with the GSCs.
Similar content being viewed by others
References
Amoroso, E. C., Baxter, M. I., Chiquoine, A. D., Nisbet, R. H.: The fine structure of neurons and other elements in the nervous system of the giant African land snail Archachatina marginata. Proc. roy. soc. B 160, 167–180 (1964)
Benjamin, P. R., Ings, C. T.,: Golgi-Cox studies on the central nervous system of a gastropod mollusc. Z. Zellforsch. 128, 564–582 (1972)
Bloom, F. E., Costa, E.: The effects of drugs on serotonergic nerve terminals. In: Advances in cytopharmacology. Clementi, F. and Ceccarelli, B., eds., p. 379–396. New York: Raven Press 1971
Bullock, T. H., Horridge, G. A.: In: Structure and function in the nervous systems of invertebrates. San Francisco-London: W. H. Freeman & Co 1965
Caro, L. G., Tubergen, P. P. van, Kolb, J. A.: High-resolution autoradiography. I. Methods. J. Cell Biol. 15, 173–188 (1962)
Coggeshall, R. E.: A light and electron-microscope study of the abdominal ganglion of Aplysia californica. J. Neurophysiol. 30, 1263–1287 (1967)
Coggeshall, R. E.: A possible sensory-motor neuron in Aplysia californica. Tissue and Cell, 3, 637–648 (1971)
Corrodi, H., Hillarp, N.-Å., Jonsson, G.: Fluorescence methods for the histochemical demonstration of monoamines. 3. Sodium borohydride reduction of the fluorescent compounds as a specificity test. J. Histochem. Cytochem. 12, 582–586 (1964)
Cottrell, G. A.: Direct postsynaptic responses to stimulation of serotonin-containing neurons. Nature (Lond.) 225, 1060–1062 (1970)
Cottrell, G. A.: Synaptic connections made by two serotonin-containing neurons in the snail (Helix pomatia) brain. Experientia (Basel) 27, 813–815 (1971a)
Cottrell, G. A.: Action of imipramine on a serotonergic synapse. Comp. gen. Pharmac. 2, 125–128 (1971b)
Cottrell, G. A.: Action of imipramine on 5-hydroxytryptamine transmission and on 5-hydroxytryptamine uptake in the snail (Helix pomatia) brain. Brit. J. Pharmacol. 43, 437P (1971c)
Cottrell, G. A., Macon, J., Szczepaniak, A. C.: Glutamic acid mimicking of synaptic inhibition on the giant serotonin neurone of the snail. Brit. J. Pharmacol. 45, 684–688 (1972)
Cottrell, G. A., Osborne, N. N.: Localization and mode of action of cardioexcitatory agents in molluscan hearts. Experientia, (Basel) Suppl. 15, 230–231 (1969)
Cottrell, G. A., Osborne, N. N.: Subcellular localization of serotonin in an identified serotonin-containing neurone. Nature (Lond.) 225, 470–472 (1970)
Cottrell, G. A., Powell, B.: Formation of serotonin by isolated serotonin-containing and by isolated non-amine-containing neurons. J. Neurochem. 18, 1695–1697 (1971)
Dahlström, A.: Axoplasmic transport (with particular respect to adrenergic neurons). Phil. Trans. B 261, 325–358 (1971)
Falck, B., Owman, C.: A detailed methodological description of the fluorescence method for the cellular demonstration of biogenic monoamines. Acta Univ. Lund., Sect. II, No 7, 1–23 (1965)
Gerschenfeld, H. M.: Observations on the ultrastructure of synapses in some pulmonate molluscs. Z. Zellforsch. 60, 258–275 (1963)
Gerschenfeld, H. M.: Serotonin: Two different inhibitory actions on snail neurons. Science 171, 1252–1254 (1971)
Gorman, A.L.F., Mirolli, M.: Axonal localization of an excitatory postsynaptic potential in a molluscan neurone. J. exp. Biol. 53, 727–736 (1970)
Gray, E. G.: The fine structural characterization of different types of synapses. Progr. Brain Res. 34, 149–160 (1971)
Holmgren, E.: Beitrag zur Morphologie der Zelle. I. Nervenzellen. Anat. Hefte 18, 269–325 (1901)
Hughes, G. M., Tauc, L.: The path of the giant cell axons in Aplysia depilans. Nature (Lond.) 191, 404–405 (1961)
Jaim-Etcheverry, G., Zieher, L. M.: Ultrastructural aspects of neurotransmitter storage in adrenergic nerves. In: Advances in cytopharmacology (Clementi, F. and Ceccarelli, B. eds.), p. 343–362. New York: Raven Press 1971
Kandel, E. R., Tauc, L.: Input organisation of two symmetrical giant cells in the snail brain. J. Physiol. (Lond.) 183, 269–280 (1966)
Meng, K.: Untersuchungen zur Störung der Herztätigkeit bei Helix pomatia. Zool. Jber. Neapel. 68, 539–566 (1960)
Mirolli, M., Welsh, J. H.: The effects of reserpine and LSD on molluscs. In: Comparative neurochemistry (Richter, D., ed.), p. 433–443. New York: Pergamon Press 1964
Nolte, A., Breucker, H., Kuhlmann, D.: Cytosomale Einschlüsse und Neurosekret im Nervengewebe von Gastropoden. Z. Zellforsch. 68, 1–27 (1965)
Osborne, N. N.: A micro-chromatographic method for the detection of biologically active monoamines in isolated neurons. Experientia (Basel) 27, 1502–1503 (1971)
Osborne, N. N.: The in vivo synthesis of serotonin in an identified serotonin-containing neuron of Helix pomatia. Int. J. Neurosci. 3, 215–228 (1972)
Osborne, N. N., Cottrell, G. A.: Transport of amines along the visceral nerve of Helix pomatia. Z. Zellforsch. 109, 171–179 (1970)
Osborne, N. N., Cottrell, G. A.: Amine and amino acid microanalysis of two identified snail neurons with known characteristics. Experientia (Basel) 28, 656–658 (1971a)
Pellegrino de Iraldi, A., Guedet, R., Suburo, A. M.: Differentiation between 5-hydroxytryptamine and catecholamines in synaptic vesicles. Progr. Brain Res. 34, 161–170 (1971)
Pentreath, V. W.: Effect of stimulating a central giant serotonin-containing neurone on peripheral muscles in the snail Helix pomatia. Experientia (Basel) 29, 540–542 (1973)
Pentreath, V. W., Cottrell, G. A.: The blood supply to the central nervous system of Helix pomatia. Z. Zellforsch. 111, 160–178 (1970)
Pentreath, V. W., Cottrell, G. A.: Selective uptake of 5-hydroxytryptamine by axonal processes in Helix pomatia. Nature (Lond.) New Biol., 239, 213–214 (1972)
Pentreath, V. W., Cottrell, G. A.: Uptake of serotonin, 5-hydroxytryptophan and tryptophan by giant serotonin-containing neurones and other neurones in the central nervous system of the snail (Helix pomatia). Z. Zellforsch. 1973
Rosenbluth, J.: The visceral ganglion of Aplysia californica. Z. Zellforsch. 60, 213–236 (1963)
Rude, S., Coggeshall, R. E., Orden, L. S. van: Chemical and ultrastructural identification of 5-hydroxytryptamine in an identified neuron. J. Cell Biol. 41, 832–854 (1969)
Schmekel, L., Wechsler, W.: Elektronenmikroskopische Untersuchungen an Cerebro-Pleural-Ganglien von Nudibranchiern. I. Die Nervenzellen. Z. Zellforsch. 89, 112–132 (1968)
Stretton, A.O.W., Kravitz, E.A.: Neuronal geometry: determination with a technique of intracellular dye injection. Science 162, 132–134 (1968)
Tauc, L., Gerschenfeld, H. M.: Cholinergic transmission mechanisms for both excitation and inhibition in molluscan central synapses. Nature (Lond.) 192, 366–367 (1961)
Twarog, B. M.: The regulation of catch in molluscan muscle. J. gen. Physiol. 50, 157–169 (1967)
Welsh, J. H.: Neurohumoral regulation and the pharmacology of a molluscan heart. Comp. Gen. Pharmacol. 2, 423–432 (1972)
Whittaker, V. P.: Subcellular localization of neurotransmitters. In: Advances in cytopharmacology (Clementi, F. and Ceccarelli, B., eds.) p. 319–330. New York: Raven Press 1971
Willows, A.O.D., Hoyle, G.: Neuronal network triggering a fixed action pattern. Science 166, 1549–1551 (1969)
Wood, J. G.: Electron microscopic localization of 5-hydroxytryptamine (5-HT). Tex. Rep. Biol. Med. 23, 828–837 (1965)
Wood, J. G.: Electron microscopic localization of amines in central nervous tissue. Nature (Lond.) 209, 1131–1133 (1966)
Zs-Nagy, I., Sakharov, D. A.: Axosomatic synapses in procerebrum of Gastropoda. Experientia (Basel) 25, 258–259 (1969)
Zs-Nagy, I., Sakharov, D. A.: The fine structure of the procerebrum of pulmonate molluscs, Helix and Limax. Tissue and Cell 2, 399–411 (1970)
Zs-Nagy, I., Borovyagin, V. L. (1972): Organization of the cytosomal membranes of molluscan neurons under normal and anaerobic conditions as revealed by electron microscopy. Tissue and Cell, 4, 73–84 (1972)
Author information
Authors and Affiliations
Additional information
We thank Dr. J.L.S. Cobb for reading the manuscript, J. Stevenson for photographic assistance, and the Medical Research Council for financial aid.
Rights and permissions
About this article
Cite this article
Pentreath, V.W., Osborne, N.N. & Cottrell, G.A. Anatomy of giant serotonin-containing neurones in the cerebral ganglia of Helix pomatia and Limax maximus . Z.Zellforsch 143, 1–20 (1973). https://doi.org/10.1007/BF00307447
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00307447