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Abstract: A series of novel 2-arylamino-3-(arylsulfonyl)quinoxalines was synthesized through a newly developed approach. All synthesized target compounds were screened for their cytotoxicities against cancer cell lines including PC3, A549, HCT116, HL60 and KB. Representative compounds with favorable cytotoxicities were tested for their PI3Kα inhibitory activities. Among the synthesized target compounds, 17 (PI3Kα IC50: 0.07 μM) displayed the most potent cellular activities (IC50 values of 0.14 μM, 0.07 μM, 0.95 μM and 0.05 μM against PC3, A549, HCT116 and HL 60, respectively). [Copyright &y& Elsevier]

Abstract: We reported the synthesis, hypoxic cytotoxic activities and selectivities of 18 new 3-(alkoxymethylamino)-1,2,4-benzotriazine 1,4-dioxides. The synthesized compounds were screened in vitro against 5 cell lines: K562, SMMC-7721, A549, PC-3 and KB in hypoxia and in normoxia. Some of them showed higher or similar cytotoxic activity when compared to tirapazamine. Physico-chemical study showed the positive correlation between hypoxic activity and lipophilicity within a certain range. Preliminary mechanism study on the potent derivatives 4b, 4l and 4m indicated that the cytotoxic activities of these compounds might be mediated by inducing apoptosis. [Copyright &y& Elsevier]

Abstract: A series of novel N-γ-carboline arylsulfonamide derivatives designed based on the common feature of colchicine binding site inhibitors were synthesized and evaluated for their antiproliferative activity in vitro against five human cancer cell lines. Most of the compounds showed moderate to potent cytotoxic activities against all the tested cells. Preliminary mechanism research on one of the most potent compound 6p indicated that it was a potent tubulin polymerization inhibitor, with IC50 value of 3.8μM, equivalent to that of CA-4, and arresting cell cycle in G2/M phase. [ABSTRACT FROM AUTHOR]

Abstract: A new series of hybrids of lamellarin D and combretastatin A 4, 1,2-diphenyl-5,6-dihydropyrrolo [2,1-a] isoquinolines, were designed as cytotoxic agents based on principles of combination in medicinal chemistry and taking the parent compounds'' different anti-proliferative mechanisms into consideration. Twenty-two novel hybrids were synthesized through a convenient route, with a key step of core pyrrole formation and evaluated for their anti-proliferative activities in vitro against K-562, A-549, SMMC-7721, SGC-7901 and HCT-116 cancer cell lines. The results showed that some hybrids had good anti-proliferative activities in low IC50 ranges. [Copyright &y& Elsevier]

Abstract: A new series of flavonoid derivatives have been designed, synthesized and evaluated as potent AChE inhibitors. Most of them showed more potent inhibitory activities to AChE than rivastigmine. The most potent inhibitor isoflavone derivative 10d inhibit AChE with a IC50 of 4nM and showed high BChE/AChE inhibition ratio (4575-fold), superior to donepezil (IC50 =12nM, 389-fold). Molecular docking studies were also performed to explore the detailed interaction with AChE. [Copyright &y& Elsevier]

Abstract: A series of cis-restricted 3,4-diaryl-5-aminoisoxazoles have been synthesized and evaluated for their biological activities. Among them, compound 11a and 13a displayed potent cytotoxic activities in vitro against five human cancer cell lines with IC50 values in the low micromolar range and two compounds inhibited tubulin polymerization with IC50 value of 1.8, and 2.1μM, respectively, similar to that of CA-4. Compound 13a could arrest at the G2/M phase of the cell cycle at the concentration of 0.1 and 1.0μM and induce apoptosis at 0.1–1.0μM. [Copyright &y& Elsevier]

Abstract: A series of novel 7-azaindazolyl-indolyl-maleimides were synthesized and evaluated for their antiproliferative activity in vitro against various human cancer cell lines and protein kinase C inhibitory activity. Compounds 8a–c, 8e and 14a were the most promising compounds against K562, A549, ECA-109, KB and SMMC-7721 cell lines in vitro. Compounds 9a–j showed moderate PKC inhibition. Further mechanism of action studies revealed that the antiproliferative activity of compound 8b in KB cells might involve the mitochondria-mediated apoptosis pathway. [Copyright &y& Elsevier]

Abstract: Three series of γ-carboline derivatives were designed and synthesized. All the compounds were tested for their cytotoxic activities in vitro against five human tumor cell lines (A549, SGC, HCT116, MCF-7, K562) and one multi-drug resistant subline (K562R). Most compounds showed moderate to potent cytotoxic activities against the tested cell lines. Sulfonate 11f exhibited more potent cytotoxic activities against almost all of the tested cells in comparison with the positive control, taxol, with IC50 values ranging from 0.15 to 4.5μM. The structure–activity relationships were discussed and a statistically reliable QSAR model (r 2 =0.936, q 2 =0.581) was established by the CoMFA analysis performed using the cytotoxic data against K562 cell line as a template. [Copyright &y& Elsevier]

Abstract: A new series of galanthamine derivatives have been designed, synthesized and evaluated as acetylcholinesterase inhibitors. All of the new compounds prepared showed high AChE inhibitory activities, with compound 3e that has an N-hexyl-benzyl piperidine substituent on the nitrogen atom reaching the best inhibitory activity for AChE (IC50 =5.62nM). The docking study performed with AutoDock demonstrated that 3e was nicely accommodated by AChE. [Copyright &y& Elsevier]