New Rev-transport inhibitor with anti-HIV activity from Valerianae Radix
摘要:
Bioassay-guided separation by use of the fission yeast expressing NES of Rev, a HIV-1 viral regulatory protein, resulted in isolation of valtrate (1) as a new Rev-transport inhibitor from the nucleus to cytoplasm from Valerianae Radix. Valtrate (1) also inhibited the p-24 production of HIV-1 virus without showing any cytotoxicity against the host MT-4 cells. (C) 2002 Elsevier Science Ltd. All rights reserved.
New Rev-transport inhibitor with anti-HIV activity from Valerianae Radix
摘要:
Bioassay-guided separation by use of the fission yeast expressing NES of Rev, a HIV-1 viral regulatory protein, resulted in isolation of valtrate (1) as a new Rev-transport inhibitor from the nucleus to cytoplasm from Valerianae Radix. Valtrate (1) also inhibited the p-24 production of HIV-1 virus without showing any cytotoxicity against the host MT-4 cells. (C) 2002 Elsevier Science Ltd. All rights reserved.
作者:Adegboyega K. Oyelere、Po C. Chen、William Guerrant、Sandra C. Mwakwari、Rebecca Hood、Yunzhe Zhang、Yuhong Fan
DOI:10.1021/jm801128g
日期:2009.1.22
Inhibition of histone deacetylase inhibitors (HDACi) hold great promise in cancer therapy because of their demonstrated ability to arrest proliferation of nearly all transformed cell types. Of the several structurally distinct small molecule HDACi reported, macrocyclic depsipeptides have the most complex recognition cap-group moieties and present an excellent opportunity for the modulation of the biological activities of HDACi. Unfortunately, the structure-activity relationship (SAR) studies for this class of compounds have been impaired largely because most macrocyclic HDACi known to date comprise complex peptide macrocycles. In addition to retaining the pharmacologically disadvantaged peptidyl backbone, they offer only limited opportunity for side chain modifications. Here, we report the discovery of a new class of macrocyclic HDAG based on the macrolide antibiotics skeletons. SAR studies revealed that these compounds displayed both linker-length and macrolide-type dependent HDAC inhibition activities with IC50 in the low nanomolar range. In addition, these non-peptide macrocyclic HDACi are more selective against HDACs 1 and 2 relative to HDAC 8, another class I HDAC isoform, and hence have subclass HDAC isoform selectivity.
Mild Method for the Selective Esterification of Carboxylic Acids Based on the Garegg−Samuelsson Reaction
作者:Sara P. Morcillo、Luis Álvarez de Cienfuegos、Antonio J. Mota、José Justicia、Rafael Robles
DOI:10.1021/jo102395c
日期:2011.4.1
A mild method for the selective esterification of primary alcohols is described. The use of different phosphines, I-2, and imidazole allows the selective esterification: of a wide variety of acids with excellent results. The generation of a bulky phosphonitun-carboxylate salt as intermediate could justify the selectivity observed in this process. Additionally, amides also can be synthesized with use of this method.
New Rev-transport inhibitor with anti-HIV activity from Valerianae Radix
Bioassay-guided separation by use of the fission yeast expressing NES of Rev, a HIV-1 viral regulatory protein, resulted in isolation of valtrate (1) as a new Rev-transport inhibitor from the nucleus to cytoplasm from Valerianae Radix. Valtrate (1) also inhibited the p-24 production of HIV-1 virus without showing any cytotoxicity against the host MT-4 cells. (C) 2002 Elsevier Science Ltd. All rights reserved.