先前已经证明,各种碳酸酐酶抑制剂 (CAI) 可以在预收缩的视网膜小动脉节段中诱导血管舒张,尽管具有不同的功效和效力。由于迄今为止测试的 CAI 能够渗透细胞膜并抑制酶的细胞内和细胞外亚型,因此尚不清楚细胞外或细胞内亚型或机制是否介导了它们的血管舒张作用。通过细线 myography,我们测试了四种新 CAI 对预收缩视网膜小动脉段壁张力的影响,这些小动脉段明显不进入细胞膜,但对 CA 的细胞溶质和膜结合亚型具有高亲和力。在 10-6 M 到 10-3 M 之间的浓度下,四种膜不透性 CAI 中没有一种对小动脉壁张力有任何显着影响,而膜渗透剂 CAI 苯甲酰胺 (10-3 M) 完全扩张了所有测试的小动脉段。这表明 CAI 通过位于血管细胞细胞质中的细胞机制充当血管扩张剂。
Design, synthesis and biological evaluation of biguanids and biguanid-sulfonamides as cholinesterase inhibitors
作者:Özge Güngör、Muhammet Köse
DOI:10.1016/j.molstruc.2022.132817
日期:2022.7
hopeful approach for pharmacological interference in various disorders such as epilepsy, Alzheimer's, Parkinson's disease and obesity. The biological and pharmacological properties of biguanidines and sulfonamides have made the compounds important. In this study, a series of biguanidine compounds (1–4) and their sulphonamide derivatives(1a-4a) were synthesized and their structures were elucidated by analytical
Membrane Permeability Is Required for the Vasodilatory Effect of Carbonic Anhydrase Inhibitors in Porcine Retinal Arteries
作者:Thor Eysteinsson、Andrea García-Llorca、Arnar Oessur Hardarson、Daniela Vullo、Fabrizio Carta、Claudiu T. Supuran
DOI:10.3390/ijms24098140
日期:——
high affinity to both cytosolic and membrane-bound isoforms of CA. At concentrations between 10−6 M to 10−3 M, none of the four membrane impermeant CAIs had any significant effect on arteriolar wall tension, while the membranepermeant CAI benzolamide (10−3 M) fully dilated all arteriolar segments tested. This suggests that CAI act as vasodilators through cellular mechanisms located in the cytoplasm
先前已经证明,各种碳酸酐酶抑制剂 (CAI) 可以在预收缩的视网膜小动脉节段中诱导血管舒张,尽管具有不同的功效和效力。由于迄今为止测试的 CAI 能够渗透细胞膜并抑制酶的细胞内和细胞外亚型,因此尚不清楚细胞外或细胞内亚型或机制是否介导了它们的血管舒张作用。通过细线 myography,我们测试了四种新 CAI 对预收缩视网膜小动脉段壁张力的影响,这些小动脉段明显不进入细胞膜,但对 CA 的细胞溶质和膜结合亚型具有高亲和力。在 10-6 M 到 10-3 M 之间的浓度下,四种膜不透性 CAI 中没有一种对小动脉壁张力有任何显着影响,而膜渗透剂 CAI 苯甲酰胺 (10-3 M) 完全扩张了所有测试的小动脉段。这表明 CAI 通过位于血管细胞细胞质中的细胞机制充当血管扩张剂。