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Science 4 September 1981:
Vol. 213. no. 4512, pp. 1129 - 1131
DOI: 10.1126/science.6168019
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Articles

Science, Vol 213, Issue 4512, 1129-1131
Copyright © 1981 by American Association for the Advancement of Science

articles

Biosynthesis of biopterin: adrenergic cyclic adenosine monophosphate-dependent inhibition in the pineal gland

G Kapatos, S Kaufman, JL Weller, and DC Klein

Pineal glands in organ culture synthesize and release biopterin and are able to maintain concentrations of biopterin occurring in vivo for up to 54 hours in vitro. The intracellular biopterin content is reduced 50 percent by treatment with l-norepinephrine or cyclic adenosine monophosphate derivatives, but not by d-norepinephrine. This is an indication that biopterin levels are regulated by an adrenergic cyclic adenosine monophosphate-dependent mechanism. The decline in tissue biopterin content, produced mainly by inhibited of biosynthesis, is maximal at 6 hours and is not associated with either an increase in biopterin release or a shift in the reduction state of the biopterin.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cytokines Stimulate GTP Cyclohydrolase I Gene Expression in Cultured Human Umbilical Vein Endothelial Cells.
Z. S. Katusic, A. Stelter, and S. Milstien (1998)
Arterioscler. Thromb. Vasc. Biol. 18, 27-32
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Science. ISSN 0036-8075 (print), 1095-9203 (online)