Synthesis of small interfering RNAs containing acetal-type nucleoside analogs at their 3′-ends and analysis of their silencing activity and their ability to bind to the Argonaute2 PAZ domain
摘要:
In this study, we aimed to create small interfering RNAs (siRNAs) with increased silencing activities and nuclease resistance properties. Therefore, we designed and synthesized five types of siRNA containing acetal-type nucleoside analogs at their 3'-dangling ends. We found that the siRNA containing 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose at the 3'-dangling end was the most potent among the synthesized siRNAs and showed more resistance to nucleolytic degradation by a 3' exonuclease than a natural RNA did. Thus, modification of siRNAs by addition of 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose may hold promise as a means of improving the silencing activity and nuclease resistance of siRNAs. (C) 2015 Elsevier Masson SAS. All rights reserved.
Synthesis of small interfering RNAs containing acetal-type nucleoside analogs at their 3′-ends and analysis of their silencing activity and their ability to bind to the Argonaute2 PAZ domain
摘要:
In this study, we aimed to create small interfering RNAs (siRNAs) with increased silencing activities and nuclease resistance properties. Therefore, we designed and synthesized five types of siRNA containing acetal-type nucleoside analogs at their 3'-dangling ends. We found that the siRNA containing 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose at the 3'-dangling end was the most potent among the synthesized siRNAs and showed more resistance to nucleolytic degradation by a 3' exonuclease than a natural RNA did. Thus, modification of siRNAs by addition of 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose may hold promise as a means of improving the silencing activity and nuclease resistance of siRNAs. (C) 2015 Elsevier Masson SAS. All rights reserved.
Direct Glycosylation of Unprotected and Unactivated Carbohydrates under Mild Conditions
作者:Matthias Pfaffe、Rainer Mahrwald
DOI:10.1021/ol203329u
日期:2012.2.3
Ligand exchange acetalization of acetals in the presence of catalytic amounts of mandelic acid and titanium tert-butoxide is reported. This transformation is successfully extended to glycosylation of unprotected and unactivated pentoses. Even unreactive pentoses such as d-arabinose or d-lyxose can be transformed by this new methodology into corresponding isopropyl glycosides.
Synthesis of small interfering RNAs containing acetal-type nucleoside analogs at their 3′-ends and analysis of their silencing activity and their ability to bind to the Argonaute2 PAZ domain
In this study, we aimed to create small interfering RNAs (siRNAs) with increased silencing activities and nuclease resistance properties. Therefore, we designed and synthesized five types of siRNA containing acetal-type nucleoside analogs at their 3'-dangling ends. We found that the siRNA containing 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose at the 3'-dangling end was the most potent among the synthesized siRNAs and showed more resistance to nucleolytic degradation by a 3' exonuclease than a natural RNA did. Thus, modification of siRNAs by addition of 1-O-(2,2,2-trifluoroethyl)-beta-D-ribofuranose may hold promise as a means of improving the silencing activity and nuclease resistance of siRNAs. (C) 2015 Elsevier Masson SAS. All rights reserved.