Inhibition of copper-mediated aggregation of human γD-crystallin by Schiff bases
摘要:
Protein aggregation, due to the imbalance in the concentration of Cu2+ and Zn2+ ions is found to be allied with various physiological disorders. Copper is known to promote the oxidative damage of beta/gamma-crystallins in aged eye lens and causes their aggregation leading to cataract. Therefore, synthesis of a small-molecule 'chelator' for Cu2+ with complementary antioxidant effect will find potential applications against aggregation of beta/gamma-crystallins. In this paper, we have reported the synthesis of different Schiff bases and studied their Cu2+ complexation ability (using UV-Vis, FT-IR and ESI-MS) and antioxidant activity. Further based on their copper complexation efficiency, Schiff bases were used to inhibit Cu2+-mediated aggregation of recombinant human gamma D-crystallin (HGD) and beta/gamma-crystallins (isolated from cataractous human eye lens). Among these synthesized molecules, compound 8 at a concentration of 100 mu M had shown 95% inhibition of copper (100 mu M)-induced aggregation. Compound 8 also showed a positive cooperative effect at a concentration of 5-15 mu M on the inhibitory activity of human alpha A-crystallin (HAA) during Cu2+-induced aggregation of HGD. It eventually inhibited the aggregation process by additional 20%. However, 50% inhibition of copper-mediated aggregation of beta/gamma-crystallins (isolated from cataractous human eye lens) was recorded by compound 8 (100 mu M). Although the reductive aminated products of the imines showed better antioxidant activity due to their lower copper complexing ability, they were found to be non-effective against Cu2+-mediated aggregation of HGD.
Paal; Reckleben, Chemische Berichte, 1895, vol. 28, p. 934
作者:Paal、Reckleben
DOI:——
日期:——
3-AMINO-2-AMINOMETHYLPHENOL DERIVATIVES AND COLORANTS COMPRISING THESE COMPOUNDS
申请人:Wella Aktiengesellschaft
公开号:EP1846361A2
公开(公告)日:2007-10-24
US4011322A
申请人:——
公开号:US4011322A
公开(公告)日:1977-03-08
[EN] 3-AMINO-2-AMINOMETHYLPHENOL DERIVATIVES AND COLORANTS COMPRISING THESE COMPOUNDS<br/>[FR] DERIVES DE 3-AMINO-2-AMINOMETHYLPHENOL ET COLORANTS CONTENANT CES COMPOSES
申请人:PROCTER & GAMBLE
公开号:WO2006086374A2
公开(公告)日:2006-08-17
[EN] 3-Amino-2-aminomethylphenol derivatives of the general formula (I) or physiologically compatible, water-soluble salts thereof, and agent comprising these compounds for the oxidative coloring of keratin fibers. [FR] L'invention porte sur des dérivés de 3-amino-2-aminomethylphenol représentés par la formule (I) ou sur des sels hydrosolubles de ceux-ci physiologiquement compatibles, ainsi que sur un agent contenant ces composés pour la coloration oxydante de fibres de kératine.