HPLC-UV assays for evaluation of inhibitors of mono and diamine oxidases using novel phenyltetrazolylalkanamine substrates
作者:Kira Mergemeier、Matthias Lehr
DOI:10.1016/j.ab.2018.03.007
日期:2018.5
inhibitors of plasma amine oxidase (PAO) using 6-(5-phenyl-2H-tetrazol-2-yl)hexan-1-amine (4) as a new type of substrate. Now we studied, whether this compound or homologues of it can also function as substrate for related amine oxidases, namely diamine oxidase (DAO), monoamine oxidase A (MAO A) and monoamine oxidase B (MAO B). Among these substances, 4 was converted by DAO with the highest rate. The best
最近,我们描述了一种使用6-(5-苯基-2H-四唑-2-基)己-1-胺(4)作为新型类型的用于评估血浆胺氧化酶(PAO)抑制剂的HPLC-UV分析方法基材。现在我们研究了该化合物或其同系物是否还可以作为相关胺氧化酶的底物,即二胺氧化酶(DAO),单胺氧化酶A(MAO A)和单胺氧化酶B(MAO B)。在这些物质中,有4种被DAO转化的比率最高。MAO A和B的最佳底物是4-(5-苯基-2H-四唑-2-基)丁-1-胺(2)。为了验证新的测定方法,确定了已知酶抑制剂的抑制值,并将数据与使用底物苄胺获得的数据进行了比较,后者经常用于胺氧化酶测定中。对于DAO抑制剂2-(4-苯基苯基)乙酰肼,当使用苄胺代替4时,相对于DAO,IC50值降低了约10倍,表明4以比苄胺更高的亲和力与酶结合。分别对MAO A和B的盐酸高铁碱和司来吉兰的IC 50值也降低了(两倍和30倍),被苄胺取代了2。将这些酶与抑制