Antimicrobial Activity of Xanthohumol and Its Selected Structural Analogues
作者:Monika Stompor、Barbara Żarowska
DOI:10.3390/molecules21050608
日期:——
which the heterocyclic ring C is closed (flavanones). The strain R. rubra was moderately sensitive to only one compound: 4-hydroxy-4'-methoxychalcone 8. Loss of the hydroxyl group in the B-ring of 4'-methoxychalcones or its replacement by a halogen atom (-Cl, -Br), nitro group (-NO₂), ethoxy group (-OCH₂CH₃), or aliphatic substituent (-CH₃, -CH₂CH₃) resulted in the loss of antimicrobial activity towards
Monoamine oxidase inhibitory activity of methoxy-substituted chalcones
作者:Bijo Mathew、Githa Elizabeth Mathew、Gulberk Ucar、Monu Joy、E.K. Nafna、Krishnakumar K. Lohidakshan、Jerad Suresh
DOI:10.1016/j.ijbiomac.2017.05.162
日期:2017.11
their human monoamineoxidaseinhibitoryactivity. With the exception of (2E)-1-(4-methoxyphenyl)-3-(4-nitrophenyl) prop-2-en-1-one (C7), which is a nonselective inhibitor, the chalcones exhibited competitive, selective, and reversible inhibition of hMAO-B. The most potent compound, (2E)-3-[4-(dimethylamino) phenyl]-1-(4-methoxyphenyl) prop-2-en-1-one (C5), showed the best inhibitoryactivity towards hMAO-B
查尔酮(1,3-二苯基-2-丙烯-1-酮)基化合物对MAO-B的抑制活性是由于其与已知的MAO-B抑制剂1,4-二苯基-2-丁烯的结构相似性所致。根据我们先前的报道,被含氟查耳酮取代的甲氧基是有希望的可逆MAO-B抑制剂,而在本研究中,合成了一系列在环B对位上带有取代基的甲氧基化查耳酮(C1-C9),评估其对人单胺氧化酶的抑制活性。除了非选择性抑制剂(2E)-1-(4-甲氧基苯基)-3-(4-硝基苯基)丙-2-烯-1-酮(C7)外,查耳酮类化合物显示出竞争性,选择性和hMAO-B的可逆抑制。最有效的化合物(2E)-3- [4-(二甲基氨基)苯基] -1-(4-甲氧基苯基)丙-2-烯-1-酮(C5),对hMAO-B表现出最佳的抑制活性(IC50 = 0.29±0.011μM; Ki = 0.14±0.001μM)。透析含有酶和抑制剂的混合物后,酶活性的恢复证明了化合物C5对MAO-B抑制的可逆性。透析前后C5的可逆性分别为25