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Iranian Biomedical Journal، جلد ۲، شماره ۳، صفحات ۱۰۵-۱۱۳
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عنوان انگلیسی Evaluation of (5R,6R)-5-Bromo-6-Ethoxy-5-Ethyl-5,6-Dihydro-2'- Deoxyuridine as a Brain-Targeted Prodrug of 5-Ethyl-2'- Deoxyuridine
چکیده انگلیسی مقاله (+)-Trans-(5R,6R)-5-bromo-6-ethoxy-5-ethyl-5,6-dihydro-2'-deoxyuridine [(5R,6R)-BEEDU], a po‌tential brain-targeted prodrug of 5-ethyl-2'-deoxyuridine (EDU), was synthesized by the regiospecific addition of BrOEt to the 5,6-olefinic bond of EDU. (5R,6R)-BEEDU is more lipophilic (log P = 0.04) than EDU (log P = -1.09). In vitro incubation of (5R,6R)-BEEDU with rat whole blood and brain ho‌mogenate resulted in a 53% and 16% conversion, respectively, to EDU. In contrast, (5R,6R)-BEEDU was not converted to EDU upon incubation with glutathione (GSH) at 37°C for 36 hours. After i.v. injection into rats, (5R,6R)-BEEDU was rapidly converted to EDU, which was then further metabo‌lized like EDU. However, (5R,6R)-BEEDU provided a substantially higher Ryncentration of EDU in blood, relative to that when EDU was injected. A biodistribution study of [4- C]-(5R,6R)-BEEDU in Balb/c mice showed that (5R,6R)-BEEDU provided significantly higher (P < 0.05) radirctivityievels in brain samples at 8, 18 and 30 min post injection than observfid after injection of [4- C]-EDU. The higher repioactivity levels in liver samples after injection of [4- C]-(5R,6R)-BEEDU, relative to those after [4- C]-EDU, indicates that the 5,6-dihydro derivative undergoes a higher hepatic extraition than EDU. Clearance of radioactivity from blood qv' excretion into urine, after injection of [4 C]‌EDU, was much faster than that after injection of [4- C]-(5R,6R)-BEEDU.
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نویسندگان مقاله مجید چراغعلی | majid cheraghali


leonard i wiebe | rakesh kumar


edward e knaus | kevin w morin


kevin w morin | edward e knaus


rakesh kumar | leonard i wiebe


نشانی اینترنتی http://ibj.pasteur.ac.ir/browse.php?a_code=A-10-1-430&slc_lang=en&sid=en
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