312276-03-2Relevant academic research and scientific papers
Mechanistic investigations on substituted benzene sulphonamides as apoptosis inducing anticancer agents
Mettu, Akhila,Naikal James Prameela, Subhashini,Talla, Venu,Thumma, Soujanya
, (2020/01/28)
In an approach to develop potent cytotoxic compounds with targeted action, a systematic methodology was employed to design and initially synthesize parent compounds A1, A8, A13 and A14 followed by synthesis of further analogs of A1 (A2-A7) and A8 (A9-A12)
Symmetrical and unsymmetrical substituted 2,5-diarylidene cyclohexanones as anti-parasitic compounds
Din, Zia Ud,Trapp, Marilia Almeida,Soman de Medeiros, Lívia,Lazarin-Bidóia, Danielle,Garcia, Francielle Pelegrin,Peron, Francieli,Nakamura, Celso Vataru,Rodríguez, Ihosvany Camps,Wadood, Abdul,Rodrigues-Filho, Edson
, p. 596 - 608 (2018/06/20)
Symmetrical and unsymmetrical bis-aryl-α,β-unsaturated ketones were synthesized in moderate to excellent yield by treating cyclohexanone with various aldehydes. Dimethylammonium dimethylcarbamate (DIMCARB) was used as both catalyst and reaction medium for the synthesis of monoarylidenes cycloadduct intermediates, which was further used to produce diarylidene cyclohexanones. All the 34 compounds synthesized were evaluated for their anti-proliferative activity, particularly against promastigote of Leishmania amazonensis, epimastigoteand trypomastigoteof Trypanosoma cruzi. Eighteen compounds displayed anti-leishmanial activity against promastigotes of L. amazonensis with IC50 values ranging from 2.8 to 10 μM. In addition, two compounds exhibited significant antitrypanosomal activity against epimastigotes of T. cruzi with IC50 values of 5.2 ± 0.8 and 3.0 ± 0.0 μM, while five compounds exhibited activity from 15.0 ± 1.4 to 30.2 ± 1.8 μM against trypomastigote of T. cruzi. Moreover, all compounds were more selective against the parasites than the epithelial cells. The unsymmetrical compounds 16, 28, 30 and 33 can be considered as favorable anti-parasitic lead molecule having IC50 and EC50 values in the low-micromolar range, better than the reference drug benznidazole, and low cytotoxicity against Vero cells. The potent compounds were screened in silico against 17 enzymes of T. cruzi and best scoring were found against Dihydroorotate Dehydrogenase.
Activation of anti-oxidant Nrf2 signaling by enone analogues of curcumin
Deck, Lorraine M.,Hunsaker, Lucy A.,Vander Jagt, Thomas A.,Whalen, Lisa J.,Royer, Robert E.,Vander Jagt, David L.
, p. 854 - 865 (2017/12/13)
Inflammation and oxidative stress are common in many chronic diseases. Targeting signaling pathways that contribute to these conditions may have therapeutic potential. The transcription factor Nrf2 is a major regulator of phase II detoxification and anti-oxidant genes as well as anti-inflammatory and neuroprotective genes. Nrf2 is widespread in the CNS and is recognized as an important regulator of brain inflammation. The natural product curcumin exhibits numerous biological activities including ability to induce the expression of Nrf2-dependent phase II and anti-oxidant enzymes. Curcumin has been examined in a number of clinical studies with limited success, mainly owing to limited bioavailability and rapid metabolism. Enone analogues of curcumin were examined with an Nrf2 reporter assay to identify Nrf2 activators. Analogues were separated into groups with a 7-carbon dienone spacer, as found in curcumin; a 5-carbon enone spacer with and without a ring; and a 3-carbon enone spacer. Activators of Nrf2 were found in all three groups, many of which were more active than curcumin. Dose-response studies demonstrated that a range of substituents on the aromatic rings of these enones influenced not only the sensitivity to activation, reflected in EC50 values, but also the extent of activation, which suggests that multiple mechanisms are involved in the activation of Nrf2 by these analogues.
Nonclassical antifolates, part 5. Benzodiazepine analogs as a new class of DHFR inhibitors: Synthesis, antitumor testing and molecular modeling study
El-Subbagh, Hussein I.,Hassan, Ghada S.,El-Messery, Shahenda M.,Al-Rashood, Sarah T.,Al-Omary, Fatmah A.M.,Abulfadl, Yasmin S.,Shabayek, Marwa I.
, p. 234 - 245 (2014/02/14)
A new series of tetrahydro-quinazoline and tetrahydro-1H-dibenzo[b,e][1,4] diazepine analogs were synthesized and tested for their DHFR inhibition and in vitro antitumor activity. Compound 35 showed a remarkable DHFR inhibitory potency (IC50, 0.004 μM) which is twenty fold more active than methotrexate (MTX). Compounds 17 and 23 proved to be fifteen fold more active than the known antitumor 5-FU, with MG-MID GI50, TGI, and LC 50 values of 1.5, 46.8, 93.3 and 1.4, 17.4, 93.3 μM, respectively. Computer modeling studies allowed the identification that methoxy and methyl substituents, the π-system of the chalcone core, the nitrogen atoms, on the dibenzodiazepine ring as pharmacophoric features essential for activity. These mark points could be used as template model for further future optimization.
Synthesis and antitumor activity of certain new thiazolo[2,3-b]quinazoline and thiazolo[3,2-a]pyrimidine analogs
Hassan, Ghada S.
, p. 388 - 401 (2014/03/21)
A novel series of thiazolo[2,3-b]quinazoline (16-19, 25-28, and 34-37) and cyclohepta[d]thiazolo[3,2-a]pyrimidine (20-23, 29-32, and 38-41) analogs was designed and synthesized. Structure elucidation of the synthesized compounds was attained by the use of H1 NMR, C13 NMR, and mass spectrometry. The obtained compounds were evaluated for their in vitro antitumor activity using the National Cancer Institute's 60 cell lines' panel assay that included nine tumor subpanels, namely, leukemia, non-small cell lung, colon, CNS, melanoma, ovarian, renal, prostate, and breast cancer cells. Most of the investigated compounds showed a remarkable broad-spectrum antitumor activity. Compounds 19, 28, 32, and 34 proved to be 10-, 15-, 2-, and 7-fold more active than 5-FU, with GI50 MG-MID values of 2.4, 1.5, 11.2, and 3.1 μM, respectively.
Mono-carbonyl curcumin analogues as 11β-hydroxysteroid dehydrogenase 1 inhibitors
Lin, Han,Hu, Guo-Xin,Guo, Jingjing,Ge, Yufei,Liang, Guang,Lian, Qing-Quan,Chu, Yanhui,Yuan, Xiaohuan,Huang, Ping,Ge, Ren-Shan
, p. 4362 - 4366 (2013/07/25)
A series of structurally novel mono-carbonyl curcumin analogues have been synthesized and biologically evaluated to test their inhibitory potencies and the structure-activity relationship (SAR) on human and rat 11β- hydroxysteroid dehydrogenase isoform (11β-HSD1) activities. 11β-HSD1 selective inhibitors have been discovered and compound A10 is discovered as a very potent with an IC50 value of 97 nM without inhibiting 11β-HSD2.
Substituted thiazoles V. Synthesis and antitumor activity of novel thiazolo[2,3-b]quinazoline and pyrido[4,3-d]thiazolo[3,2-a]pyrimidine analogues
Al-Omary, Fatmah A.M.,Hassan, Ghada S.,El-Messery, Shahenda M.,El-Subbagh, Hussein I.
scheme or table, p. 65 - 72 (2012/02/15)
A novel series of thiazolo[2,3-b]quinazoline (14-23, 26 and 27), and pyrido[4,3-d]thiazolo[3,2-a]pyrimidine (34-43, 45 and 46) analogues were designed and synthesized. The obtained compounds were evaluated for their in-vitro antitumor activity at the National Cancer Institute (NCI) 60 cell lines panel assay. Compounds 22, 38, 40 and 41 showed remarkable broad-spectrum antitumor activity. Compounds 22 and 38 are almost nine fold more active than 5-FU, with GI50, TGI, and LC50 values of 2.5, >100, >100; and 2.4, 9.1, 36.2 μM, respectively; while 40 and 41 are almost seven fold more active than 5-FU, with GI50, TGI, and LC50 values of 2.9, 12.4, 46.6 and 3.0, 16.3, 54.0 μM, respectively.
Effects of diarylpentanoid analogues of curcumin on chemiluminescence and chemotactic activities of phagocytes
Jantan, Ibrahim,Bukhari, Syed Nasir Abbas,Lajis, Nordin Haji,Abas, Faridah,Wai, Lam Kok,Jasamai, Malina
experimental part, p. 404 - 412 (2012/07/02)
Objectives A series of 43 curcumin diarylpentanoid analogues were synthesized and evaluated for their inhibitory effects on the chemiluminescence and chemotactic activity of phagocytes in vitro. Methods The effects of the compounds on the respiratory burst of human whole blood and isolated human polymorphonuclear leukocytes (PMNs) were evaluated using a luminol-based chemiluminescence assay and their effect on chemotactic migration of PMNs was investigated using the Boyden chamber technique. Key findings Compounds 6, 17, 25 and 30 exhibited significant inhibitory activity on the oxidative burst of PMNs. The presence of methoxy groups at positions 2 and 5, and methoxylation and fluorination at positions 4 and 2 of both phenyl rings, respectively, may contribute significantly to their reactive oxygen species inhibition activity. Compounds 7, 17, 18, 24 and 32 showed strong inhibition of the chemotaxis migration of PMNs. Chlorination at various positions of both phenyl rings of cyclohexanone diarylpentanoid resulted in compounds with potent inhibitory effects on PMN migration. Conclusions The results suggest that some of these diarylpentanoid analogues are able to modulate the innate immune response of phagocytes at different steps, emphasizing their potential as a source of new immunomodulatory agents.
CURCUMIN ANALOGS AND METHODS OF USE THEREOF
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Page/Page column 20-21, (2012/03/09)
Curcumin analogs and methods of use thereof are provided.
Synthesis and evaluation of curcumin-related compounds for anticancer activity
Wei, Xingchuan,Du, Zhi-Yun,Zheng, Xi,Cui, Xiao-Xing,Conney, Allan H.,Zhang, Kun
experimental part, p. 235 - 245 (2012/08/28)
Sixty-one curcumin-related compounds were synthesized and evaluated for their anticancer activity toward cultured prostate cancer PC-3 cells, pancreas cancer Panc-1 cells and colon cancer HT-29 cells. Inhibitory effects of these compounds on the growth of PC-3, Panc-1 and HT-29 cells were determined by the MTT assay. Compounds E10, F10, FN1 and FN2 exhibited exceptionally potent inhibitory effects on the growth of cultured PC-3, Panc-1 and HT-29 cells. The IC50 for these compounds was lower than 1 μM in all three cell lines. E10 was 72-, 46- and 117-fold more active than curcumin for inhibiting the growth of PC-3, Panc-1 and HT-29 cells, respectively. F10 was 69-, 34- and 72-fold more active than curcumin for inhibiting the growth of PC-3, Panc-1 and HT-29 cells, respectively. FN1 and FN2 had about the same inhibitory effect as E10 and F10 toward Panc-1 cells but were less active than E10 and F10 toward PC-3 and HT-29 cells. The active compounds were potent stimulators of apoptosis. The present study indicates that E10, F10, FN1 and FN2 may have useful anticancer activity.
