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Science 17 May 1968:
Vol. 160. no. 3829, pp. 767 - 768
DOI: 10.1126/science.160.3829.767
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Articles

Tyramine-H3: Deaminated Metabolites in Neuroblastoma Tumors and in Continuous Cell Line of a Neuroblastoma

M. Goldstein 1, B. Anagnoste 1, and M. N. Goldstein 2

1 Department of Psychiatry and Neurology, New York University Medical Center, New York
2 Department of Anatomy, Washington University, St. Louis, Missouri

Neuroblastoma tumors, as well as cultured cells of neuroblastoma, contain high monoamine oxidase activity. The major deaminated metabolite of tyramine-H3 in the incubation mixtures with the tumors or with the cultured cells is p-hydroxyphenylacetaldehyde. Upon addition of reduced nicotinamide-adenine dinucleotide phosphate, the aldehyde was further metabolized by the reductive pathway to p-hydroxyphenylethanol, whereas upon addition of nicotinamide-adenine dinucleotide phosphate the aldehyde was only metabolized to a minor extent by the oxidative pathway to p-hydroxyphenylacetic acid. Aldehyde dehydrogenase activity is very low in the neuroblastoma tumors and in the cultured neuroblastoma cells. The generation of aldehydes and alcohols by the action of monoamine oxidase suggests that the deaminated metabolites of biogenic amines might exhibit some toxic effects in neuroblastoma patients.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Hypoxanthine-guanine phosphoribosyltransferase mutant glioma cells: diminished monamine oxidase activity.
S. Skaper and J. Seegmiller (1976)
Science 194, 1171-1173
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