CLEFMA—An anti-proliferative curcuminoid from structure–activity relationship studies on 3,5-bis(benzylidene)-4-piperidones
摘要:
3,5-Bis(benzylidene)-4-piperidones are being advanced as synthetic analogs of curcumin for anti-cancer and anti-inflammatory properties. We performed structure-activity relationship studies, by testing several synthesized 3,5-bis(benzylidene)-4-piperidones for anti-proliferative activity in lung adenocarcinoma H441 cells. Compared to the lead compound 1, or 3,5-bis(2-fluorobenzylidene)-4-piperidone, five compounds were found to be more potent (IC50 <30 mu M), and 16 compounds possessed reduced cell-killing efficacy (IC50 >50 mu M). Based on the observations, we synthesized 4-[3,5-bis(2-chlorobenzyl-idene-4-oxo-piperidine-1-yl)-4-oxo-2-butenoic acid] (29 or CLEFMA) as a novel analog of 1. CLEFMA was evaluated for anti-proliferative activity in H441 cells, and was found to be several folds more potent than compound 1. We did not find apoptotic cell population in flow cytometry, and the absence of apoptosis was confirmed by the lack of caspase cleavage. The electron microscopy of H441cells indicated that CLEFMA and compound 1 induce autophagic cell death that was inhibited by specific autophagy inhibitor 3-methyladenine. The results suggest that the potent and novel curcuminoid, CLEFMA, offers an alternative mode of cell death in apoptosis-resistant cancers. (C) 2010 Elsevier Ltd. All rights reserved.
Design, synthesis, and biological evaluation of novel <strong>EF24 </strong>and <strong>EF31 </strong>analogs as potential I&kappa;B kinase &beta; inhibitors for the treatment of pancreatic cancer
作者:Xuemeng Xie、Jinfu Tu、Heyi You、Bingren Hu
DOI:10.2147/dddt.s133172
日期:——
Given the important role that inhibitory kappa B (IκB) kinaseβ (IKKβ) plays in pancreatic cancer (PC) development and progression, inhibitors targeting IKKβ are believed to be increasingly popular as novel anti-PC therapies. Two synthetic molecules, named EF24 and EF31, exhibited favorable potential in terms of inhibition of both IKKβ activity and PC cell proliferation. Aiming to enhance their cellular
Dipolar cycloaddition based multi-component reaction: Synthesis of spiro tethered acenaphthylene–indolizine–pyridinone hybrids
作者:Raju Suresh Kumar、Abdulrahman I. Almansour、Natarajan Arumugam、Govindasami Periyasami、S. Athimoolam、Raju Ranjith Kumar、Mohammad Asad、Abdullah M. Asiri
DOI:10.1016/j.tetlet.2018.07.051
日期:2018.8
novel dispiro acenaphthylene–indolizine–pyridinone hybrid heterocycles have been achieved through one-pot four-component domino 1,3-dipolar cycloaddition–Michael addition–air oxidation sequence of reactions.
Functionalized spirooxindole-indolizine hybrids: Stereoselective green synthesis and evaluation of anti-inflammatory effect involving TNF-α and nitrite inhibition
Stereoselectivesynthesis of a small library of novel spiroheterocyclic hybrids including indolizine, oxindole, and substituted piperidine units has been accomplished in [bmim]Br using a [3 + 2] cycloaddition strategy in good yield and were tested for their anti-inflammatory activities. The effects of compounds (4a-o) against inflammation were studied using carrageenan-induced hind paw oedema, croton
Discovery of diazahexa/hepta cyclic cage-like compounds with broad-spectrum antifungal activity against <i>Candida</i> and <i>Cryptococcus</i> species
作者:Anthony Weinstock、Natarajan Arumugam、Abdulrahman I. Almansour、Raju Suresh Kumar、Shankar Thangamani
DOI:10.1039/c9ra05777c
日期:——
FDA-approved antifungal drugs along with the paucity of antifungal drugs warrants novel drugs to treat invasive fungal infections. In this study, we investigated the antifungalactivity of a novel series of diazahexa/hepta cyclic cage-like compounds. Results indicate that compounds with unsubstituted and o-methyl substitution on aryl rings exhibit potent broad-spectrum antifungalactivity against various
由念珠菌和隐球菌引起的侵袭性真菌感染会导致免疫功能低下的个体发生危及生命的感染。此外,对 FDA 批准的抗真菌药物耐药的真菌菌株的发生率增加以及抗真菌药物的缺乏需要新的药物来治疗侵袭性真菌感染。在这项研究中,我们研究了一系列新型二氮杂六/七环状笼状化合物的抗真菌活性。结果表明,在芳环上具有未取代和邻甲基取代的化合物对各种真菌菌株表现出有效的广谱抗真菌活性。此外,这些化合物对念珠菌表现出显着的抑制活性菌丝和生物膜的形成。总的来说,这项研究的结果表明,这些化合物有希望开发为治疗耐药真菌感染的新型抗真菌药物。
Dispiropyrrolidine tethered piperidone heterocyclic hybrids with broad-spectrum antifungal activity against Candida albicans and Cryptococcus neoformans
作者:Sarah Lawson、Natarajan Arumugam、Abdulrahman I. Almansour、Raju Suresh Kumar、Shankar Thangamani
DOI:10.1016/j.bioorg.2020.103865
日期:2020.7
Invasive fungal infections along with rising incidence of resistance to antifungal drugs pose increasing threat to immunocompromised individuals, including cancer patients. In this study, we examined the antifungal activity of dispiropyrrolidine tethered piperidone heterocyclic hybrids. Results indicate that compounds 5a and 6i have demonstrated a potent antifungal effect on multiple fungal strains, including Candida albicans, without exhibiting cytotoxicity to mammalian cells. Furthermore, these two compounds exhibited significant inhibition on Candida albicans hyphae and biofilm development that surpasses the FDA-approved antifungal drug currently used for treatment. Taken together, our results suggest that 5a and 6i are promising candidates for development into new antifungal drugs.