Abstract
Intraventricular infusions of octopamine which raised brain octopamine concentrations more than 20 000-fold resulted in reductions in brain noradrenaline and dopamine by as much as 90% without affecting the alertness or activity of normal rats. As this reduction of brain catecholamines is much greater than any reported in hepatic coma, we do not believe that values observed in experimental hepatic failure have aetiological significance for the encephalopathy that ensues.
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- Dodsworth J. M., James J. H., Cummings M. C., Fischer J. F. Depletion of brain norepinephrine in acute hepatic coma. Surgery. 1974 Jun;75(6):811–820. [PubMed] [Google Scholar]
- Fischer J. E., Baldessarini R. J. False neurotransmitters and hepatic failure. Lancet. 1971 Jul 10;2(7715):75–80. doi: 10.1016/s0140-6736(71)92048-4. [DOI] [PubMed] [Google Scholar]
- Fischer J. E., Baldessarini R. J. Letter: Neurotransmitter metabolism in hepatic encephalopathy. N Engl J Med. 1975 Nov 27;293(22):1152–1153. doi: 10.1056/NEJM197511272932217. [DOI] [PubMed] [Google Scholar]
- Fischer J. E., James J. H. Mechanism of action of L-dopa in hepatic coma. Surg Forum. 1971;22:347–349. [PubMed] [Google Scholar]
- Fischer J. E., Rosen H. M., Ebeid A. M., James J. H., Keane J. M., Soeters P. B. The effect of normalization of plasma amino acids on hepatic encephalopathy in man. Surgery. 1976 Jul;80(1):77–91. [PubMed] [Google Scholar]
- Lam K. C., Tall A. R., Goldstein G. B., Mistilis S. P. Role of a false neurotransmitter, octopamine, in the pathogenesis of hepatic and renal encephalopathy. Scand J Gastroenterol. 1973;8(6):465–472. [PubMed] [Google Scholar]
- Manghani K. K., Lunzer M. R., Billing B. H., Sherlock S. Urinary and serum octopamine in patients with portal-systemic encephalopathy. Lancet. 1975 Nov 15;2(7942):943–946. doi: 10.1016/s0140-6736(75)90359-1. [DOI] [PubMed] [Google Scholar]
- Munro H. N., Fernstrom J. D., Wurtman R. J. Insulin, plasma aminoacid imbalance, and hepatic coma. Lancet. 1975 Mar 29;1(7909):722–724. doi: 10.1016/s0140-6736(75)91632-3. [DOI] [PubMed] [Google Scholar]
- Peterson D. W., Sparber S. B. Increased fixed-ratio performance and differential d- and l-amphetamine action following norepinephrine depletion by intraventricular 6-hydroxydopamine. J Pharmacol Exp Ther. 1974 Dec;191(3):349–357. [PubMed] [Google Scholar]
- Refshauge C., Kissinger P. T., Dreiling R., Blank L., Freeman R., Adams R. N. New high performance liquid chromatographic analysis of brain catecholamines. Life Sci. 1974 Jan 16;14(2):311–322. doi: 10.1016/0024-3205(74)90061-7. [DOI] [PubMed] [Google Scholar]
- Saavedra J. M. Enzymatic-isotopic method for octopamine at the picogram level. Anal Biochem. 1974 Jun;59(2):628–633. doi: 10.1016/0003-2697(74)90316-9. [DOI] [PubMed] [Google Scholar]
- Snyder S. H., Young A. B., Bennett J. P., Mulder A. H. Synaptic biochemistry of amino acids. Fed Proc. 1973 Oct;32(10):2039–2047. [PubMed] [Google Scholar]
- Zieve F. J., Zieve L., Doizaki W. M., Gilsdorf R. B. Synergism between ammonia and fatty acids in the production of coma: implications for hepatic coma. J Pharmacol Exp Ther. 1974 Oct;191(1):10–16. [PubMed] [Google Scholar]