Exploiting the Polypharmacology of ß-Carbolines to Disrupt <i>O. volvulus</i> Molting
作者:Major Gooyit、Nancy Tricoche、Sacha Javor、Sara Lustigman、Kim D. Janda
DOI:10.1021/ml500516r
日期:2015.3.12
Onchocerciasis is an infection caused by the filarial worm Onchocerca volvulus, which can eventually result in blindness. The lack of an effective macrofilaricide and the possible development of ivermectin-resistant strains of O. volvulus necessitate the, need for alternative treatment strategies. We have shown that targeting the L3-stagespecific chitinase OvCHT1 impairs the shedding of the filarial cuticle. In our continued efforts to discover OvCHT1 inhibitors, we identified the beta-carboline alkaloid scaffolding as a chitinase inhibitor that is capable of penetrating the worm cuticle. Herein, we disclose the rich polypharmacology of the beta-carboline class of compounds as an approach to abrogate the molting of the parasite and thus the initiation of infection in the human host.
Design, synthesis and 3D-QSAR of β-carboline derivatives as potent antitumor agents
作者:Rihui Cao、Xiangdong Guan、Buxi Shi、Zhiyong Chen、Zhenhua Ren、Wenlie Peng、Huacan Song
DOI:10.1016/j.ejmech.2010.02.036
日期:2010.6
In a continuing effort to develop novel beta-carbolines endowed with better pharmacological profiles, a series of beta-carboline derivatives were designed and synthesized based on the previously developed SARs. Cytotoxicities in vitro of these compounds against a panel of human tumor cell lines were also investigated. The results demonstrated that the N(2)-benzylated beta-carbolinium bromides 56-60 represented the most potent compounds with IC(50) values lower than 10 mu M. The application of 3D-QSAR to these compounds explored the structural basis for their biological activities. CoMFA (q(2) = 0.513, r(2) = 0.862) and CoMSIA (q(2) = 0.503, r(2) = 0.831) models were developed for a set of 47 beta-carbolines. The results indicated that the antitumor pharmacophore of these molecules were marked at position-1, -2, -3, -7 and -9 of beta-carboline ring.
Synthesis of Fluorescent, DNA-Binding Benzo[<i>b</i>]indolonaphthyridinium Derivatives by a Misguided Westphal Condensation
作者:Philipp Groß、Heiko Ihmels
DOI:10.1021/acs.joc.1c02755
日期:2022.3.18
A novel type of azoniahetarene, namely, benzo[b]indolonaphthyridinium, was unexpectedly formed by the reaction of N-alkylated β-carbolinium derivatives and the enolizable 1,2-cyclohexadione under typical conditions of a Westphal reaction. The products exhibit high fluorescence intensities in polar solvents (Φfl = 0.52–0.67) and bind to DNA by intercalation with high affinity (Kb = 1.5 × 106 M–1). Furthermore
在 Westphal 反应的典型条件下, N-烷基化 β-咔啉衍生物和可烯醇化的 1,2-环己二酮反应出乎意料地形成了一种新型的氮杂杂环芳烃,即苯并[ b ]吲哚萘啶鎓。产物在极性溶剂中表现出高荧光强度 (Φ fl = 0.52–0.67),并通过插入以高亲和力与 DNA 结合 ( K b = 1.5 × 10 6 M –1 )。此外,在相同条件下,通过 Westphal 反应从具有至少一个非烯醇化 α-碳原子的 1,2-二酮合成 DNA 结合 sempervirine 衍生物,这表明反应途径由底物结构决定。