Abstract |
5'-Deoxy-5'-[(monofluoromethyl)thio] adenosine (9) and 5'-deoxy-5'-fluoro-5'-(methylthio)adenosine (10), two novel analogues of 5'-deoxy-5'-(methylthio)adenosine ( MTA), have been synthesized and evaluated for their substrate and inhibitory activities toward MTA phosphorylase and for their biological effects in L1210 ( MTA phosphorylase deficient) and L5178Y ( MTA phosphorylase containing) murine leukemia cell lines. Compound 9 was a potent competitive inhibitor of MTA phosphorylase with a Ki value of 3.3 microM and was also a substrate, with activity approximately 53% that of MTA. Compound 10 was significantly less inhibitory toward the phosphorylase with a Ki value of 141 microM; its lack of substrate activity was attributed to rapid nonenzymatic degradation. The 50% growth inhibitory concentrations (48 h) of 9 were 300 and 200 microM in L1210 and L5178Y cells, respectively; for 10, these respective values were 2 and 0.7 microM. The initial characterization of 9 in these systems reveals that it differs from MTA by not acting as a product regulator of the polyamine biosynthetic pathway.
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Authors | J R Sufrin, A J Spiess, D L Kramer, P R Libby, C W Porter |
Journal | Journal of medicinal chemistry
(J Med Chem)
Vol. 32
Issue 5
Pg. 997-1001
(May 1989)
ISSN: 0022-2623 [Print] United States |
PMID | 2496231
(Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
- Biogenic Polyamines
- Deoxyadenosines
- Thionucleosides
- 5'-deoxy-5'-((monofluoromethyl)thio)adenosine
- 5'-deoxy-5'-fluoro-5'-(methylthio)adenosine
- 5'-methylthioadenosine
- Purine-Nucleoside Phosphorylase
- 5'-methylthioadenosine phosphorylase
- Adenosine
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Topics |
- Adenosine
(analogs & derivatives, chemical synthesis, pharmacology)
- Animals
- Biogenic Polyamines
(biosynthesis)
- Cell Division
(drug effects)
- Deoxyadenosines
- Leukemia, Experimental
(pathology)
- Mice
- Purine-Nucleoside Phosphorylase
(antagonists & inhibitors)
- Thionucleosides
(chemical synthesis, pharmacology)
- Tumor Cells, Cultured
(drug effects)
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