Synthesis and biophysical evaluation of arylhydrazono-1H-2-indolinones as β-amyloid aggregation inhibitors
摘要:
A series of isatin-3-arylhydrazones were synthesized and evaluated in vitro as inhibitors of A beta(1-40) aggregation using a thioflavin T fluorescence method. An exploration of the effects on A beta(1-40) aggregation of a number of diverse substituents at phenylhydrazone group and 5,6- positions of the indolinone nucleus led us to single out some new anti-aggregating compounds with IC50 values in the low micromolar range. The most active compounds carry methoxy- or hydroxy- substituents in the indolinone 5,6-positions and lipophilic groups such as iPr and Cl at 4'- and 3'-position, respectively, of the phenylhydrazone moiety. Two derivatives are noteworthy, namely 18 (IC50 = 0.4 mu M) and 42 (IC50 = 1.1 mu M). The in vitro effects of the highly active, water soluble, compound 42 on the temporal evolution of A beta(1-40) fibrils formation were further investigated by circular dichroism spectroscopy, transmission electron microscopy and dynamic light scattering studies, which clearly showed that this compound delayed and lowered the amyloid fibril formation. (C) 2010 Elsevier Masson SAS. All rights reserved.
Synthesis and biophysical evaluation of arylhydrazono-1H-2-indolinones as β-amyloid aggregation inhibitors
摘要:
A series of isatin-3-arylhydrazones were synthesized and evaluated in vitro as inhibitors of A beta(1-40) aggregation using a thioflavin T fluorescence method. An exploration of the effects on A beta(1-40) aggregation of a number of diverse substituents at phenylhydrazone group and 5,6- positions of the indolinone nucleus led us to single out some new anti-aggregating compounds with IC50 values in the low micromolar range. The most active compounds carry methoxy- or hydroxy- substituents in the indolinone 5,6-positions and lipophilic groups such as iPr and Cl at 4'- and 3'-position, respectively, of the phenylhydrazone moiety. Two derivatives are noteworthy, namely 18 (IC50 = 0.4 mu M) and 42 (IC50 = 1.1 mu M). The in vitro effects of the highly active, water soluble, compound 42 on the temporal evolution of A beta(1-40) fibrils formation were further investigated by circular dichroism spectroscopy, transmission electron microscopy and dynamic light scattering studies, which clearly showed that this compound delayed and lowered the amyloid fibril formation. (C) 2010 Elsevier Masson SAS. All rights reserved.
Insights into Structure-Activity Relationships of 3-Arylhydrazonoindolin-2-One Derivatives for Their Multitarget Activity on β-Amyloid Aggregation and Neurotoxicity
作者:Rosa Purgatorio、Modesto de Candia、Annalisa De Palma、Francesco De Santis、Leonardo Pisani、Francesco Campagna、Saverio Cellamare、Cosimo Altomare、Marco Catto
DOI:10.3390/molecules23071544
日期:——
3-(2-arylhydrazono)indolin-2-one derivatives was synthesized and assayed, investigating the effects of substitutions on both the indole core and arylhydrazone moiety. Compared with the reference compound 1, we disclosed equipotent derivatives bearing alkyl substituents at the indole nitrogen, and fairly tolerated bioisosteric replacements at the arylhydrazone moiety. For most of the investigated compounds
Synthesis and biophysical evaluation of arylhydrazono-1H-2-indolinones as β-amyloid aggregation inhibitors
作者:Francesco Campagna、Marco Catto、Rosa Purgatorio、Cosimo D. Altomare、Angelo Carotti、Angelo De Stradis、Gerardo Palazzo
DOI:10.1016/j.ejmech.2010.11.015
日期:2011.1
A series of isatin-3-arylhydrazones were synthesized and evaluated in vitro as inhibitors of A beta(1-40) aggregation using a thioflavin T fluorescence method. An exploration of the effects on A beta(1-40) aggregation of a number of diverse substituents at phenylhydrazone group and 5,6- positions of the indolinone nucleus led us to single out some new anti-aggregating compounds with IC50 values in the low micromolar range. The most active compounds carry methoxy- or hydroxy- substituents in the indolinone 5,6-positions and lipophilic groups such as iPr and Cl at 4'- and 3'-position, respectively, of the phenylhydrazone moiety. Two derivatives are noteworthy, namely 18 (IC50 = 0.4 mu M) and 42 (IC50 = 1.1 mu M). The in vitro effects of the highly active, water soluble, compound 42 on the temporal evolution of A beta(1-40) fibrils formation were further investigated by circular dichroism spectroscopy, transmission electron microscopy and dynamic light scattering studies, which clearly showed that this compound delayed and lowered the amyloid fibril formation. (C) 2010 Elsevier Masson SAS. All rights reserved.