Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Letter
  • Published:

L-Glutamic Acid Decarboxylase in Parkinson's Disease: Effect of L-Dopa Therapy

Abstract

IN Parkinson's disease severe decreases occur in striatal L-dopa decarboxylase, putaminal synaptosomal uptake of dopamine, and dopamine and homovanillic acid concentrations in the nigro-striato-pallidal complex1–4. In addition, L-glutamic decarboxylase (GAD) activity is decreased in the caudate nucleus5. The experiments described here were performed to further evaluate this finding and to determine the effect (if any) of L-dopa therapy.

This is a preview of subscription content, access via your institution

Access options

Buy this article

Prices may be subject to local taxes which are calculated during checkout

Similar content being viewed by others

References

  1. Hornykiewicz, O., in Handbook of Neurochemistry (edit. by Lajtha, A.), 7, 465 (Plenum, New York, 1972).

    Book  Google Scholar 

  2. Lloyd, K. G., and Hornykiewicz, O., Science, 170, 1212 (1970).

    Article  ADS  CAS  Google Scholar 

  3. Lloyd, K. G., and Hornykiewicz, O., Fifth International Congress on Pharmacology (Abstract) (1972).

    Google Scholar 

  4. Lloyd, K. G., thesis, Univ. Toronto (1972).

  5. Bernheimer, H., and Hornykiewicz, O., Arch. Exp. Path., 243, 295 (1962).

    Article  Google Scholar 

  6. Lloyd, K. G., and Hornykiewicz, O., J. Neurochem., 19, 1549 (1972).

    Article  CAS  Google Scholar 

  7. Perkinson, E. N., and DaVanzo, J. P., Biochem. Pharmacol., 17, 2498 (1968).

    Article  CAS  Google Scholar 

  8. McGeer, E. G., McGeer, P. L., Wada, J. A., and Jung, E., Brain Res., 32, 425 (1971).

    Article  CAS  Google Scholar 

  9. McGeer, P. L., McGeer, E. G., and Wada, J. A., Neurology, 21, 1000 (1971).

    Article  CAS  Google Scholar 

  10. Kim, J. S., Bak, I. J., Hassler, R., and Okada, Y., Exp. Brain Res., 14, 95 (1971).

    Article  CAS  Google Scholar 

  11. Greenfield, J. G., Neuropathology, 530 (Arnold, London, 1958).

  12. Davidson, L., Lloyd, K. G., Dankova, J., and Hornykiewicz, O., Experientia, 27, 1048 (1971).

    Article  CAS  Google Scholar 

  13. Rinne, U. K., Sonninen, V., and Hyyppa, M., Life Sci., 10, (I) 549 (1971).

    Article  CAS  Google Scholar 

  14. Lloyd, K. G., and Hornykiewicz, O., in Treatment of Parkinsonism (edit. by Calne, D. B.) (Raven Press, New York, 1973).

    Google Scholar 

  15. Schott, H. F., and Clark, W. G., J. Biol. Chem., 196, 449 (1952).

    CAS  Google Scholar 

  16. Kurtz, D. S., and Kanfer, J. N., J. Neurochem., 18, 2235 (1971).

    Article  CAS  Google Scholar 

  17. Barbeau, A., J. Canad. Med. Assoc., 101, 791 (1969).

    Google Scholar 

  18. Curci, P., and Prandi, G., Rev. Farmacol. Terap., 111, 197 (1972).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

LLOYD, K., HORNYKIEWICZ, O. L-Glutamic Acid Decarboxylase in Parkinson's Disease: Effect of L-Dopa Therapy. Nature 243, 521–523 (1973). https://doi.org/10.1038/243521a0

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1038/243521a0

This article is cited by

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing