Decomposition Pathways and in Vitro HIV Inhibitory Effects of IsoddA Pronucleotides: Toward a Rational Approach for Intracellular Delivery of Nucleoside 5‘-Monophosphates
摘要:
The decomposition pathways and kinetics in various biological media and the in vitro anti-HIV-1 and anti-HIV-2 activities of four derivatives of the 5'-mononucleotide of isoddA incorporating carboxylate esterase-labile transient phosphate protecting groups are reported and compared: namely, two mononucleoside aryl phosphoramidate derivatives 1a,b and two mononucleoside phosphotriester derivatives incorporating two S-acyl-2-thioethyl groups 2a,b. All four compounds show better antiviral activity, compared to the parent nucleoside analog isoddA. The results highlight that both types of compounds act as pronucleotides, i.e. they exert their antiviral effect via intracellular delivery of the 5'-mononucleotide of isoddA. The results may give insights for the design of new more efficient pronucleotides.
Direct One-Step Fluorescent Labeling of <i>O</i>-GlcNAc-Modified Proteins in Live Cells Using Metabolic Intermediates
作者:Hong Yee Tan、Razieh Eskandari、David Shen、Yanping Zhu、Ta-Wei Liu、Lianne I. Willems、Matthew G. Alteen、Zarina Madden、David J. Vocadlo
DOI:10.1021/jacs.8b08260
日期:2018.11.14
donor sugar substrates permit direct monitoring of OGT activity on protein substrates in vitro. We show that feeding cells with a corresponding fluorescent metabolic precursor for the last step of the hexosamine biosynthetic pathway (HBP) leads to its metabolic assimilation and labeling of O-GlcNAcylated proteins within live cells. This one-step metabolic feeding strategy permits labeling of O-GlcNAcylated
NUCLEOSIDE DERIVATIVES AS INHIBITORS OF RNA-DEPENDENT RNA VIRAL POLYERMASE
申请人:MERCK SHARP & DOHME CORP.
公开号:US20170183373A1
公开(公告)日:2017-06-29
The present invention provides nucleoside compounds and certain derivatives thereof which are inhibitors of RNA-dependent RNA viral polymerase. These compounds are inhibitors of RNA-dependent RNA viral replication and are useful for the treatment of RNA-dependent RNA viral infection. They are particularly useful as inhibitors of hepatitis C virus (HCV) NS5B polymerase, as inhibitors of HCV replication, and/or for the treatment of hepatitis C infection. The invention also describes pharmaceutical compositions containing such nucleoside compounds alone or in combination with other agents active against RNA-dependent RNA viral infection, in particular HCV infection. Also disclosed are methods of inhibiting RNA-dependent RNA polymerase, inhibiting RNA-dependent RNA viral replication, and/or treating RNA-dependent RNA viral infection with the nucleoside compounds of the present invention.
Selective Fluorescence Labeling of Lipids in Living Cells
作者:Anne B. Neef、Carsten Schultz
DOI:10.1002/anie.200805507
日期:2009.2.9
phosphatidic acid derivatives with alkyne groups in their fatty acid chains were synthesized and incorporated into mammalian cell membranes. Copper(I)‐catalyzed and strain‐promoted azide–alkyne cycloaddition reactions were used for their visualization (see schematic representation and fluorescence microscopic image).
Prometabolites of 5-Diphospho-<i>myo</i>-inositol Pentakisphosphate
作者:Igor Pavlovic、Divyeshsinh T. Thakor、Laurent Bigler、Miranda S. C. Wilson、Debabrata Laha、Gabriel Schaaf、Adolfo Saiardi、Henning J. Jessen
DOI:10.1002/anie.201503094
日期:2015.8.10
involves the generation of precursors in which the negative charges are masked with biolabile groups. A PP‐InsPy prometabolite would require twelve to thirteen biolabile groups, which need to be cleaved by cellular enzymes to release the parent molecules. Such densely modified prometabolites of phosphate esters and anhydrides have never been reported to date. This study discloses the synthesis of such
The invention provides compounds of formula I, II, and III as described herein, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates that are useful for preparing the compounds. The compounds of formula I, II, and III are useful as anti-viral agents and/or as anti-cancer agents.