Cloned cytosine deaminase gene expression of Bifidobacterium longum and application to enzyme/pro-drug therapy of hypoxic solid tumors.
Bifidobacterium longum is a nonpathogenic anaerobic bacterium among normal bacterial flora. Recently, it was reported that B. longum accumulated in hypoxic solid tumors. The gene of interest was expressed in transfected B. longum by the shuttle vector pBLES100 in solid tumors. In this report, we constructed pBLES100-S-eCD, which included the cytosine deaminase gene. We confirmed by western blotting that transfected B. longum produced cytosine deaminase. In addition, transfected B. longum produced cytosine deaminase that converted 5-fluorocytosine into 5-fluorouracil. B. longum could be useful for enzyme/pro-drug therapy of hypoxic solid tumors.
Process for selectively producing 1-phosphorylated sugar derivative anomer and process for producing nucleoside
A desired isomer is selectively prepared by phosphorolyzing and isomerizing an anomer mixture of a 1-phosphorylated saccharide derivative while crystallizing one of the isomers to displace the equilibrium. Furthermore, using the action of a nucleoside phosphorylase, a nucleoside is prepared from the 1-phosphorylated saccharide derivative obtained and a base with improved stereoselectivity and a higher yield. This process is an anomer-selective process for preparing a 1-phosphorylated saccharide derivative and a nucleoside.
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(2008/06/13)
Antitumor Properties of 2(1H)-Pyrimidinone Riboside (Zebularine) and Its Fluorinated Analogues
2(1H)-Pyrimidinone riboside (zebularine, 1b) and its 5-fluoro (6b) and 2'-ara-fluoro (7b) analogues have been synthesized and evaluated in vivo as antitumor agents.Zebularine provides increase in life span (ILS) values of ca. 70percent against intraperito
Driscoll, John S.,Marquez, Victor E.,Plowman, Jacqueline,Liu, Paul S.,Kelley, James A.,Barchi, Joseph J.
p. 3280 - 3284
(2007/10/02)
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