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Deoxyribonucleoside triphosphate pools and growth of glutathione-depleted 3T6 mouse fibroblasts
Medical Nobel Institute for Biochemistry I, Karolinska Institute, Stockholm, Sweden.
Medical Nobel Institute for Biochemistry I, Karolinska Institute, Stockholm, Sweden.
1996 (English)In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 220, no 1, 42-46 p.Article in journal (Refereed) Published
Abstract [en]

Buthionine sulfoximine (BSO) selectively blocks g-glutamylcysteine synthetase and thereby depletes cells of glutathione (GSH). In cultures of exponentially growing 3T6 mouse fibroblasts, 0.1 mM BSO rapidly stopped GSH synthesis after treatment for 12 hours. The GSH-depleted cells grew as well as control 3T6 cells with no decrease in DNA synthesis. Furthermore, the pools of deoxyribonucleoside triphosphates (dNTPs), typically tightly regulated in cultured cells, did not change in size. Ribonucleotide reductase catalyzes the reduction of all four ribonucleotides and occupies a key position in dNTP regulation. Our data suggest that the GSH-glutaredoxin (a GSH-dependent disulfide-oxidoreductase) system is not the sole/major hydrogen carrier from NADPH for the reduction of ribonucleoside diphosphates by ribonucleotide reductase.

Place, publisher, year, edition, pages
Elsevier, 1996. Vol. 220, no 1, 42-46 p.
National Category
Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-98849DOI: 10.1006/bbrc.1996.0353PubMedID: 8602854OAI: oai:DiVA.org:liu-98849DiVA: diva2:656000
Available from: 2013-10-14 Created: 2013-10-14 Last updated: 2017-12-06Bibliographically approved

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Spyrou, Giannis

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