Assessment of 5-substituted Isatin as Surface Recognition Group: Design, Synthesis, and Antiproliferative Evaluation of Hydroxamates as Novel Histone Deacetylase Inhibitors
作者:Avineesh Singh、Kamlesh Raghuwanshi、Vijay K Patel、Deepak K Jain、Ravichandran Veerasamy、Anshuman Dixit、Harish Rajak
DOI:10.1007/s11094-017-1616-1
日期:2017.8
Histone deacetylase (HDAC) is a promising target for cancer treatment. HDAC inhibitors consist of three pharmacophoric features: an aromatic cap group, zinc binding group (ZBG), and a linker chain connecting cap group to ZBG. Herein, we report on (i) substituted isatin moiety as the cap group that recognizes the surface of active enzyme pocket and (ii) thiosemicarbazide moiety incorporated as linker group responsible for connecting the cap group to ZBG (hydroxamic acid). The synthesized compounds were evaluated for their antiproliferative activity and HDAC enzyme inhibition. The binding mode analysis of proposed compounds was evaluated by docking studies. Several analogs were found to inhibit HDAC and cellular proliferation of Hela cervical cancer cells, with GI50 values in the micromolar range. One compound (Vd) was found to have greater in vitro antiproliferative activity in comparison to other compounds.
Synthesis, Biological Evaluation, and Molecular Docking Studies of Novel Isatin-Thiazole Derivatives as α-Glucosidase Inhibitors
作者:Zhenzhen Xie、Guangcheng Wang、Jing Wang、Ming Chen、Yaping Peng、Luyao Li、Bing Deng、Shan Chen、Wenbiao Li
DOI:10.3390/molecules22040659
日期:——
4-position of the right phenyl and 2-fluorobenzyl substituent at the N1-positions of the 5-methylisatin displayed the highest inhibitory activity with an IC50 value of 5.36 ± 0.13 μm. Moleculardocking studies revealed the existence of hydrophobic interaction, CH-π interaction, arene-anion interaction, arene-cation interaction, and hydrogen bond between these compounds and α-glucosidase enzyme.
Synthesis and antibacterial activity of Schiff bases of 5-substituted isatins
作者:Kamaleddin Haj Mohammad Ebrahim Tehrani、Maryam Hashemi、Maryam Hassan、Farzad Kobarfard、Shohreh Mohebbi
DOI:10.1016/j.cclet.2015.10.027
日期:2016.2
Abstract Based on the existing reports on the bioactive isatin derivatives, a number of Schiff bases were synthesized by reacting 5-substituted isatins with bioactive amines/hydrazides and their structures were confirmed using spectroscopic methods such as NMR, IR and massspectrometry. Furthermore, N -benzylation of isatin followed by the Schiff base formation furnished a new series of compounds (
Manganese(II) complexes of biological relevance: Synthesis and spectroscopic characterization of novel manganese(II) complexes with monobasic bidentate ligands derived from halo-substituted 1H-indole-2,3-diones
作者:S. Sharma、R. Meena、Y. Satyawana、N. Fahmi
DOI:10.1134/s1070363216120446
日期:2016.12
synthesized metal complexes. The ligands and complexes were tested in vitro against bacteria (Escherichia coli and Staphylococcus aureus) and fungi (Fusarium semitectum and Aspergillus flavus) to show that they were active against all the microbial strains examined, and the metal complexes were more active in comparison with the ligands. DNA cleavage activity of the complexes was examined by gel electrophoresis
具有四个一元二齿配体L 1 H [2-(5-氟-2-二氢-2-氧-2-氧-1 H-吲哚-3-亚烷基)肼甲酰胺],L 2 H [2- (5-氟-2-二氢-2-氧-1 H-吲哚-3-亚烷基)肼甲硫代酰胺],L 3 H [2-(5-溴-2-二氢-2-氧-2-氧-1 H-吲哚-3 -配体与MnCl 2 ·4H 2配位合成了L- 4 H [2-亚甲基]肼甲酰胺]和L 4 H [2-(5-溴-2-二氢-2-氧代-1 H-吲哚-3-亚甲基)肼甲硫酰胺]在甲醇中摩尔比为1:1和1:2。Schiff碱配体和络合物的特征在于元素分析,熔点,分子量,IR,1 H和13 C NMR,UV-Vis,EPR和质谱以及X射线粉末衍射图。根据光谱数据,提出了所有合成金属配合物的四面体几何形状。在体外测试了配体和复合物对细菌(大肠杆菌和金黄色葡萄球菌)和真菌(半镰刀菌和黄曲霉)的抵抗力。)表明它们对所有检测的微生物菌株均具
In vitro evaluation of the activity of thiosemicarbazone derivatives against mycotoxigenic fungi affecting cereals
作者:Francesca Degola、Caterina Morcia、Franco Bisceglie、Francesca Mussi、Giorgio Tumino、Roberta Ghizzoni、Giorgio Pelosi、Valeria Terzi、Annamaria Buschini、Francesco Maria Restivo、Tiziana Lodi
DOI:10.1016/j.ijfoodmicro.2015.02.009
日期:2015.5
With a steadily increasing world population, a more efficient system of food production is of paramount importance. One of the major causes of food spoilage is the presence of fungal pathogens and the production and accumulation of mycotoxins. In the present work we report a study on the activity of a series of functionalized thiosemicarbazones (namely cuminaldehyde, trans-cinnamaldehyde, quinoline-2-carboxyaldehyde, 5-fluoroisatin thiosemicarbazone and 5-fluoroisatin N4-methylthiosemicarbazone), as antifungal and anti-mycotoxin agents, against the two major genera of cereal mycotoxigenic fungi, i.e. Fusarium and Aspergillus. These thiosemicarbazones display different patterns of efficacy on fungal growth and on mycotoxin accumulation depending on the fungal species. Some of the molecules display a greater effect on mycotoxin synthesis than on fungal growth. (C) 2015 Elsevier B.V. All rights reserved.