Bisphosphonate Inhibition of the Exopolyphosphatase Activity of the Trypanosoma brucei Soluble Vacuolar Pyrophosphatase
摘要:
Trypanosoma brucei, the causative agent of African trypanosomiasis, contains a soluble, vacuolar pyrophosphatase, TbVSP1, not present in humans, which is essential for the growth of bloodstream forms in their mammalian host. Here, we report the inhibition of a recombinant TbVSP1 expressed in Escherichia coli by a panel of 81 bisphosphonates. The IC50 values were found to vary from similar to 2 to 850 mu M. We then used 3D QSAR (comparative molecular field and comparative molecular similarity index; CoMFA and CoMSIA) methods to analyze the enzyme inhibition results. The R-2 values for the experimental versus the QSAR-predicted activities were 0.78 or 0.61 for CoMFA and 0.79 or 0.68 for CoMSIA, for two different alignments. The root-mean-square (rms) pIC(50) error for the best CoMFA model was 0.41 for five test sets of five activity predictions, which translates to a factor of similar to 2.6 error in IC50 prediction. For CoMSIA, the rms pIC(50) error and error factors were 0.35 and 2.2, respectively. In general, the most active compounds contained both a single aromatic ring and a hydrogen bond donor feature. Thirteen of the more potent compounds were then tested in vivo in a mouse model of T. brucei infection. The most active compound in vivo provided a 40% protection from death with no apparent side effects, suggesting that further development of such compounds may be of interest.
[EN] DIARYLUREAS AS CB1 ALLOSTERIC MODULATORS<br/>[FR] DIARYLURÉES EN TANT QUE MODULATEURS ALLOSTÉRIQUES DE CB1
申请人:RTI INT
公开号:WO2018209030A1
公开(公告)日:2018-11-15
The present invention provides novel diarylurea derivatives (compounds of formula (I)) and their uses. The compounds of the present invention are demonstrated to be allosteric modulators of the CB1 receptor, and therefore useful for the treatment of diseases and conditions mediated by CB1.
[EN] CYCLIC INHIBITORS OF 11ß-HYDROXYSTERIOD DEHYDROGENASE 1<br/>[FR] INHIBITEURS CYCLIQUES DE LA 11?-HYDROXYSTÉROÏDE DÉSHYDROGÉNASE 1
申请人:VITAE PHARMACEUTICALS INC
公开号:WO2009017664A1
公开(公告)日:2009-02-05
This invention relates to novel compounds of the Formula (I), (Ia), (Ib), (Ic), (Id), (Ie), (If), (Ig), (Ih); (Ii); (Ij), (Ik), (II) pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof, which are useful for the therapeutic treatment of diseases associated with the modulation or inhibition of 11 β-HSD1 in mammals. The invention further relates to pharmaceutical compositions of the novel compounds and methods for their use in the reduction or control of the production of cortisol in a cell or the inhibition of the conversion of cortisone to cortisol in a cell.
[EN] HETEROCYCLIC DERIVATIVES AND USE THEREOF<br/>[FR] DÉRIVÉS HÉTÉROCYCLIQUES ET LEUR UTILISATION
申请人:C & C RES LAB
公开号:WO2014196793A1
公开(公告)日:2014-12-11
A heterocyclic derivative represented by formula (I), or a pharmaceutically acceptable salt or a stereoisomer thereof, which has an inhibitory effect on the activation of STAT3 protein, and is useful for the prevention or treatment of diseases associated with the activation of STAT3 protein.
Pd-Catalyzed Kumada−Corriu Cross-Coupling Reactions at Low Temperatures Allow the Use of Knochel-type Grignard Reagents
作者:Ruben Martin、Stephen L. Buchwald
DOI:10.1021/ja070830d
日期:2007.4.1
A catalyst system able to operate at temperatures as low as −65 °C for the Pd-catalyzed Kumada−Corriu cross-couplingreaction is described. This unprecedented level of activity allows the use of highly functionalized (Knochel-type) Grignard reagents. Additionally, the tolerance of the protocol toward a wide variety of functional groups allows for the synthesis of valuable compounds, including heterocyclic
[EN] EFGR INHIBITOR, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF<br/>[FR] INHIBITEUR D'EFGR, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 一种EGFR抑制剂及其制备方法和应用