[EN] NEW ALICYCLIC-AMINE-SUBSTITUTED 4-CARBOXAMIDO-BENZIMIDAZOLES AS PARP-INHIBITORS AND ANTIOXIDANTS [FR] NOUVEAUX 4-CARBOXAMIDO-BENZIMIDAZOLES ALICYCLIQUES SUBSTITUES PAR UNE AMINE UTILISES COMME INHIBITEURS DE PARP ET COMME ANTIOXYDANTS
摘要:
公式(I)的化合物及其药用或技术上可接受的酸加成盐——其中,在公式中,R1代表氢、C(1-4)烷基或C(1-4)烷氧基;R2代表氢、C(1-4)烷基、羧基、C(1-4)烷氧羰基、羧酰胺、芳基或杂芳基;R3代表氢、C(1-4)烷基、芳基亚甲基或芳基;Y代表一个价键、一个直链或支链的C(1-4)烯烃、一个羰基氨基-C(1-4)烯烃或一个-S-(CH2)m-基团,其中上述所有烯烃基团可能由一个芳基烯基团隔开;n代表零或整数1;m代表整数1、2或3;Q代表氢、羟基或氧自由基(0),或与相邻环的N原子一起形成一个+ N = O(氧肟酸)基团;Z代表一个单键或双键,以及它们的药用或技术上可用的盐,它们的制备方法以及它们作为PARP抑制剂和抗氧化剂的生物用途。
New Poly(ADP-ribose) Polymerase-1 Inhibitors with Antioxidant Activity Based on 4-Carboxamidobenzimidazole-2-ylpyrroline and -tetrahydropyridine Nitroxides and Their Precursors
摘要:
4-Carboxamidobenzimidazoles were previously described as PARP inhibitor compounds. Here we report upon 4-carboxamido-1H-benzimidazoles substituted in the 2-position with nitroxides or their amine or hydroxylamine precursors. Among the new molecules, a highly active PARP inhibitor 4h (IC50 = 14 nM) was identified with antioxidant/radical scavenger activity. We concluded that in most cases sterically hindered amines are better PARP inhibitors than their oxidized form and structural changes in the 2-substituted 4-carboxamido-1H-benzimidazoles (such as N-substitution or changing the position of the carboxamide group) were detrimental to PARP inhibition activity but not to antioxidant activity. These results indicate the advantages of combining an antioxidant nitroxide or nitroxide precursor with a PARP inhibitor molecule to decrease or eliminate the deleterious processes initiated by reactive oxygen and reactive nitrogen species (ROS and RNS). The radical scavenging capability of 4h was demonstrated by EPR study of urine collected after drug administration.