Abstract
IN retina as in brain, the metabolism of glutamic acid and γ-aminobutyric acid (GABA) is compartmentalised in biochemically defined pools1–4. When retinas are incubated in vitro with radioactive glutamate and GABA, the specific activity of the glutamine produced is greater than the specific activity of the total tissue glutamate. This indicates that glutamine is formed from a small glutamate pool of higher specific activity than the total glutamate pool. To understand better the metabolic organisation of these amino acids in retina, the anatomic localisation of the small glutamate pool is essential. There is evidence that Müller cells (retinal glia) may be the site of the small glutamate pool. Autoradiographic studies indicate that mammalian Müller cells take up GABA and glutamate5–8. Moreover, these cells contain succinic semialdehyde dehydrogenase9 and GABA-transaminase10 which are enzymes involved in the degradative metabolism of GABA. In a number of species, glutamine synthetase (GS), a key enzyme of the small glutamate pool11, shows a striking increase in activity12–14 which parallels the morphological development of the Müller cell15–17. We describe here the localisation of GS to Müller cells in rat retina by immunohistochemical techniques.
Similar content being viewed by others
References
Starr, M. S. J. Neurochem. 23, 337–344 (1974).
Kennedy, A. J., Voaden, M. J. & Marshall, J. Nature 252, 50–52 (1974).
Van den Berg, C. J. in Metabolic Compartmentation in the Brain (eds Balázs R. & Cremer, J. E.) 137–166 (Wiley, New York, 1972).
Berl, S. & Clarke, D. D. in Handbook of Neurochemistry 2 (ed. Lajtha, A) 447–472 (Plenum, New York, 1969).
White, R. D. & Neal, M. J. Brain Res. 111, 79–93 (1976).
Neal, M. J. Adv. exp. Med. Biol. 69, 211–220 (Plenum, New York, 1976).
Ehinger, B. Brain Res. 46, 297–311 (1972).
Neal, M. J. & Iversen, L. L. Nature new Biol. 235, 217–218 (1972).
Moore, C. L. & Gruberg, E. R. Brain Res. 67, 467–478 (1974).
Hyde, J. C. & Robinson, N. Nature 248, 432–433 (1974).
Van den Berg, C. J. Handbook of Neurochemistry 2 (ed. Lajtha, A.) 371 (Plenum, New York, 1969).
Moscona, A. A. in Biochemistry of Cell Differentiation, 24 (eds Monroy, A. & Tsanev, R.) 1–23 (Academic, New York, 1973).
Chader, G. J. Archs Biochem. Biophys. 144, 657–662 (1971).
Lavail, M. M. & Reif-Lehrer, L. J. Cell Biol. 51, 348–354 (1971).
Kuwabara, T. & Weidman, T. A. Invest. Ophthal. 13, 725–739 (1974).
Weidman, T. A. & Kuwabara, T. Archs Ophthal. 79, 470–484 (1968).
Olney, J. W. Invest. Ophthal. 7, 250–268 (1968).
Nakane, P. K. & Pierce, G. B. J. Histochem. Cytochem. 14, 929–931 (1967).
Nakane, P. K. & Kawaoi, A. J. Histochem. Cytochem. 22, 1084–1091 (1974).
Martinez-Hernandez, A., Bell, K. P. & Norenberg, M. D. Science 195, 1356–1358 (1977).
Martinez-Hernandez, A., Merrill, D. A., Naughton, M. A. Geczy, C. J. Histochem. Cytochem. 23, 146–148 (1975).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
RIEPE, R., NORENBURG, M. Müller cell localisation of glutamine synthetase in rat retina. Nature 268, 654–655 (1977). https://doi.org/10.1038/268654a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/268654a0
- Springer Nature Limited
This article is cited by
-
Glial Glutamine Homeostasis in Health and Disease
Neurochemical Research (2023)
-
Müller cell degeneration and microglial dysfunction in the Alzheimer’s retina
Acta Neuropathologica Communications (2022)
-
Decreased Glucose Metabolism and Glutamine Synthesis in the Retina of a Transgenic Mouse Model of Alzheimer’s Disease
Cellular and Molecular Neurobiology (2022)
-
Photoreceptor metabolic reprogramming: current understanding and therapeutic implications
Communications Biology (2021)
-
Phosphatidylserine recognition and Rac1 activation are required for Müller glia proliferation, gliosis and phagocytosis after retinal injury
Scientific Reports (2020)