Constitutive activation of STAT3 can play a vital role in the development of melanoma. STAT3-targeted therapeutics are reported to show efficacy in melanomas harboring the BRAFV600E mutant and also in vemurafenib-resistant melanomas. We designed and synthesized a series of substituted nitric oxide (NO)-releasing quinolone-1,2,4-triazoleioxime hybrids, hypothesizing that the introduction of a STAT3 binding scaffold would augment their cytotoxicity. All the hybrids tested showed a comparable level of in vitro NO production. 7b and 7c exhibited direct binding to the STAT3-SH domain with IC50 of similar to 0.5 mu M. Also, they abrogated STAT3 tyrosine phosphorylation in several cancer cell lines, including the A375 melanoma cell line that carries the BRAFV600E mutation. At the same time, they did not affect the phosphorylation of upstream kinases or other STAT isoforms. 7c inhibited STAT3 nuclear translocation in mouse embryonic fibroblast while 7b and 7c inhibited STAT3 DNA-binding activity in the A375 cell line. Their anti-proliferating activity is attributed to their ability to trigger the production of reactive oxygen species and induce G1 cell cycle arrest in the A375 cell line. Interestingly, 7b and 7c showed robust cell growth suppression and apoptosis induction in two pairs of BRAF inhibitor-naive (-S) and resistant (-R) melanoma cell lines containing a BRAF V600E mutation. Surprisingly, MEL1617-R cells that are known to be more resistance to MEK inhibition by GSK1120212 than MEL1617-S cells exhibit a similar response to 7b and 7c. (C) 2019 Elsevier Masson SAS. All rights reserved.
Synthesis and molecular dynamic simulation studies of novel N-(1-benzylpiperidin-4-yl) quinoline-4-carboxamides as potential acetylcholinesterase inhibitors
作者:Haniyeh Pashaei、Atiyeh Rouhani、Mojgan Nejabat、Farzin Hadizadeh、Salimeh Mirzaei、Hamid Nadri、Mahdi Faal Maleki、Razieh Ghodsi
DOI:10.1016/j.molstruc.2021.130919
日期:2021.11
reaction. Although docking study of these compounds predicted that they will inhibit acetylcholinesterase (AChE) protein strongly and more than the reference drugs, the in vitro evaluation of the quinolines 5a-5 h revealed that most of them had moderate activity toward AChE. The results showed that there is a correlationbetween anticholinesterase inhibitory potency and docking energy of compounds. Among these
作者:Tamer S. Kaoud、Aliaa M. Mohassab、Heba A. Hassan、Chunli Yan、Sabrina X. Van Ravenstein、Dalia Abdelhamid、Kevin N. Dalby、Mohamed Abdel-Aziz
DOI:10.1016/j.ejmech.2019.111885
日期:2020.1
Constitutive activation of STAT3 can play a vital role in the development of melanoma. STAT3-targeted therapeutics are reported to show efficacy in melanomas harboring the BRAFV600E mutant and also in vemurafenib-resistant melanomas. We designed and synthesized a series of substituted nitric oxide (NO)-releasing quinolone-1,2,4-triazoleioxime hybrids, hypothesizing that the introduction of a STAT3 binding scaffold would augment their cytotoxicity. All the hybrids tested showed a comparable level of in vitro NO production. 7b and 7c exhibited direct binding to the STAT3-SH domain with IC50 of similar to 0.5 mu M. Also, they abrogated STAT3 tyrosine phosphorylation in several cancer cell lines, including the A375 melanoma cell line that carries the BRAFV600E mutation. At the same time, they did not affect the phosphorylation of upstream kinases or other STAT isoforms. 7c inhibited STAT3 nuclear translocation in mouse embryonic fibroblast while 7b and 7c inhibited STAT3 DNA-binding activity in the A375 cell line. Their anti-proliferating activity is attributed to their ability to trigger the production of reactive oxygen species and induce G1 cell cycle arrest in the A375 cell line. Interestingly, 7b and 7c showed robust cell growth suppression and apoptosis induction in two pairs of BRAF inhibitor-naive (-S) and resistant (-R) melanoma cell lines containing a BRAF V600E mutation. Surprisingly, MEL1617-R cells that are known to be more resistance to MEK inhibition by GSK1120212 than MEL1617-S cells exhibit a similar response to 7b and 7c. (C) 2019 Elsevier Masson SAS. All rights reserved.
Exploration of 2-phenylquinoline-4-carboxamide linked benzene sulfonamide derivatives as isoform selective inhibitors of transmembrane human carbonic anhydrases
A novel series of 32 sulfonamide containing quinolines (5a-j, 7a-k and 9a-k) were synthesized using tail approach and assayed for their carbonicanhydrase inhibitory potency against four human (h) carbonicanhydrase (CA) isoforms hCA I, II, IX and XII. Most of these newly synthesized compounds exhibited interesting inhibition potency against hCA I, II, IX and XII, in the nanomolar range with some derivatives