Abstract
1. The effects of 6-hydroxydopamine (6-OHDA) on adrenergic nerves in the domestic fowl have been investigated with ultrastructural and fluorescence histochemical methods.
2. 6-OHDA depletes the nerves of catecholamine, initially by displacing it from the storage vesicles. 6-OHDA enters large as well as small vesicles, indicating that large granular vesicles in adrenergic nerves are sites of amine storage.
3. Doses of 6-OHDA, insufficient to cause degeneration, still cause loading of the vesicles.
4. The effects of various drugs on the action of 6-OHDA indicate that this drug must be taken up by the nerves and reach a critical extragranular axoplasmic concentration before degeneration will occur; 6-OHDA bound in the vesicles plays no part in the degenerative process.
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- Buckley G. A., Wheater L. E. The isolated expansor secundariorum--a smooth muscle preparation from the wing of the domestic fowl. J Pharm Pharmacol. 1968 Dec;20(Suppl):114S+–114S+. doi: 10.1111/j.2042-7158.1968.tb09871.x. [DOI] [PubMed] [Google Scholar]
- Hamberger B., Malmfors T. Uptake and release of alpha-methyl-noradrenaline in vitro after reserpine pretreatment. A histochemical study. Acta Physiol Scand. 1967 Jul-Aug;70(3):412–418. doi: 10.1111/j.1748-1716.1967.tb03639.x. [DOI] [PubMed] [Google Scholar]
- LAVERTY R., SHARMAN D. F., VOGT M. ACTION OF 2, 4, 5-TRIHYDROXYPHENYLETHYLAMINE ON THE STORAGE AND RELEASE OF NORADRENALINE. Br J Pharmacol Chemother. 1965 Apr;24:549–560. doi: 10.1111/j.1476-5381.1965.tb01745.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Malmfors T., Sachs C. Degeneration of adrenergic nerves produced by 6-hydroxydopamine. Eur J Pharmacol. 1968 Apr;3(1):89–92. doi: 10.1016/0014-2999(68)90056-3. [DOI] [PubMed] [Google Scholar]
- PORTER C. C., TOTARO J. A., STONE C. A. Effect of 6-hydroxydopamine and some other compounds on the concentration of norepinephrine in the hearts of mice. J Pharmacol Exp Ther. 1963 Jun;140:308–316. [PubMed] [Google Scholar]
- Porter C. C., Totaro J. A., Burcin A. The relationship between radioactivity and norepinephrine concentrations in the brains and hearts of mice following administration of labeled methyldopa or 6-hydroxydopamine. J Pharmacol Exp Ther. 1965 Oct;150(1):17–22. [PubMed] [Google Scholar]
- SHORE P. A., BUSFIELD D., ALPERS H. S. BINDING AND RELEASE OF METARAMINOL: MECHANISM OF NOREPINEPHRINE DEPLETION BY ALPHA-METHYL-M-TYROSINE AND RELATED AGENTS. J Pharmacol Exp Ther. 1964 Nov;146:194–199. [PubMed] [Google Scholar]
- Thoenen H., Tranzer J. P. Chemical sympathectomy by selective destruction of adrenergic nerve endings with 6-Hydroxydopamine. Naunyn Schmiedebergs Arch Exp Pathol Pharmakol. 1968;261(3):271–288. doi: 10.1007/BF00536990. [DOI] [PubMed] [Google Scholar]
- Tranzer J. P., Thoenen H. An electron microscopic study of selective, acute degeneration of sympathetic nerve terminals after administration of 6-hydroxydopamine. Experientia. 1968 Feb 15;24(2):155–156. doi: 10.1007/BF02146956. [DOI] [PubMed] [Google Scholar]
- Tranzer J. P., Thoenen H. Various types of amine-storing vesicles in peripheral adrenergic nerve terminals. Experientia. 1968 May 15;24(5):484–486. doi: 10.1007/BF02144407. [DOI] [PubMed] [Google Scholar]

