Abstract
Melatonin, a hormone originally discovered in the pineal gland1, has also been found in the retina of several vertebrate species2–5. The enzyme system for melatonin synthesis also exists in the retina2,3,6–8, where the activity of one such enzyme, (serotonin N-acetyltransferase) varies with changes in light intensity in a circadian pattern3,8. As the activity of dopamine containing amacrine neurones of the retina is influenced by changes in illumination9–12 it was of interest to determine the effect of melatonin and its precursors, serotonin and N-acetylserotonin, on the release of 3H-dopamine from rabbit retina. I report here that picomolar concentrations of melatonin (IC50 9pM) selectively inhibited the calcium-dependent release of 3H-dopamine from rabbit retina, but not from striatum. Melatonin, was 1,000 times more potent than its precursor N-acetylserotonin in inhibiting the release of 3H-dopamine in retina, while the putative neurotransmitter serotonin13, was inactive. It is suggested that the light-dependent production of melatonin could play a physiological role in modulating the activity of dopamine-containing neurones in the retina.
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References
Lerner, A. B., Case, J. D. & Heinzelman, R. V. J. Am. chem. Soc. 81, 6084–6085 (1959).
Quay, W. B. Life Sci. 4, 983–991 (1965).
Hamm, H. E. & Menaker, M. Proc. natn. Acad. Sci. U.S.A. 77, 4998–5002 (1980).
Bubenik, G. A., Purtill, R. A., Brown, G. M. & Grota, L. J. Expl Eye Res. 27, 323–333 (1978).
Pang, S. P., Yu, H. S. & Tang, P. L. J. exp. Zool. 222, 11–15 (1982).
Cardinali, D. P. Endocrine Rev. 2, 327–346 (1981).
Gern, W. A. & Ralph, C. L. Science 204, 183–184 (1979).
Binkley, S., Hryshchyshyn, M. & Reilly, K. Nature 281, 479–481 (1979).
Iuvone, P. M., Galli, C. L. & Neff, N. H. Molec. Pharmac. 14, 1212–1219 (1978).
Kramer, S. G. Invest. Ophth. 10, 438–452 (1971).
Morgan, W. W. in Cell Biology of the Eye, 533–554 (Academic, New York, 1982).
Parkinson, D. & Rando, R. R. Inv. Ophthal. vis. Sci. 24, 384–388 (1983).
Osborne, N. N. Expl Eye Res. 33, 371–380 (1981).
Dubocovich, M. L. & Weiner, N. J. Pharmac. exp. Ther. 219, 701–707 (1981).
Dubocovich, M. L. & Weiner, N. J. Pharmac. exp. Ther. 224, 634–639 (1983).
Dubocovich, M. L. & Weiner, N. in Advances in Dopamine Research (eds ohsaka, M. et al.) 273–278 (Pergamon, Oxford, 1982).
Dubocovich, M. L. Fedn Proc. (in the press).
Zisapel, N., Egozi, Y. & Laudon, M. Brain Res. 246, 161–163 (1982).
Zisapel, N. & Laudon, M. Biochem. biophys. Res. Commun. 104, 1610–1616 (1982).
Pang, S. F. & Yew, D. T. Experiencia 35, 231–233 (1979).
Besharse, J. C. & Dunis, D. A. Science 219, 1341–1343 (1983).
Ehinger, B. in Transmitters in the Visual Process (ed. Bonting, S. L.) 145–163 (Pergamon, Oxford, 1976).
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Dubocovich, M. Melatonin is a potent modulator of dopamine release in the retina. Nature 306, 782–784 (1983). https://doi.org/10.1038/306782a0
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DOI: https://doi.org/10.1038/306782a0
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