20S proteasome as novel biological target for organochalcogenanes
作者:Leandro Piovan、Priscila Milani、Marcio S. Silva、Patrícia G. Moraes、Marilene Demasi、Leandro H. Andrade
DOI:10.1016/j.ejmech.2013.12.011
日期:2014.2
ranged from 16 to 35 μM indicating great potential to be explored in 20S proteasome inhibition. Cellular assays with those compounds were employed to verify the cytotoxicity and ability to inhibit 20S proteasome in cell. These assays demonstrated that organoselenuranes are capable of maintaining their selectivity in cell while the organotelluranes became inactive under cellular conditions. Stability studies
针对苏氨酸蛋白酶的新型抑制剂,即20S蛋白酶体(20S PT),评估了一系列含高价硒和碲的化合物(有机硒酸和有机碲酸)。体外试验表明,这些化合物对20S PT的β2催化位点具有很高的抑制力和特异性。相对于有机芥酸甘油酯,有机tellaranes被确定为更有效的抑制剂,因为它们的IC 50范围为3.5至16μM,而对于有机芥酸甘油酯,IC 50则为50范围从16到35μM,表明在20S蛋白酶体抑制中有巨大的潜力。用这些化合物进行细胞试验以验证细胞毒性和抑制细胞中20S蛋白酶体的能力。这些测定法证明了有机硒代神经营养素能够在细胞中维持其选择性,而有机碲化神经营养素在细胞条件下变得无活性。有机硫属元素烷的稳定性研究通过77 Se和125 Te NMR分析进行。观察到有机telluranes在酶法测定条件下是稳定的,而有机粘硒酸中,抑制活性的结构是环化的有机粘硒酸。