Efficient modification of PAMAM G1 dendrimer surface with β-cyclodextrin units by CuAAC: impact on the water solubility and cytotoxicity
作者:Kendra Sorroza-Martínez、Israel González-Méndez、Ricardo D. Martínez-Serrano、José D. Solano、Andrea Ruiu、Javier Illescas、Xiao Xia Zhu、Ernesto Rivera
DOI:10.1039/d0ra02574g
日期:——
The toxicity of the poly(amidoamine) dendrimers (PAMAM) caused by the peripheral amino groups has been a limitation for their use as drug carriers in clinical applications.
Design, synthesis and biological evaluation of novel 2-methylpyrimidine-4-ylamine derivatives as inhibitors of Escherichia coli pyruvate dehydrogenase complex E1
As potential inhibitors of Escherichia coli pyruvate dehydrogenase complex E1 (PDHc E1), a series of novel 2-methylpyrimidine-4-ylamine derivatives were designed based on the structure of the active site of PDHc E1 and synthesized using 'click chemistry'. Their inhibitory activity in vitro against PDHc E1 and fungicidal activity were examined. Some of these compounds such as 3g, 3l, 3n, 3o, and 5b demonstrated to be effective inhibitors of PDHc E1 from E. coli and exhibited antifungal activity. SAR analysis indicated that both, the inhibitory potency against E. coli PDHc E1 and the antifungal activity of title compounds, could be increased greatly by optimizing substituent groups in the compounds. The structures of substituent group in 5-position on the 1,2,3-triazole and 4-position on the benzene ring in title compounds were found to play a pivotal role in both above-mentioned biological activities. Amongst all the compounds, compound 5b with iodine in the 5-position of 1,2,3-triazole and with nitryl group in the 4-position of benzene ring acted as the best inhibitor against PDHc E1 from E. coli. It was also found to be the most effective compound with higher antifungal activity against Rhizoctonia solani and Botrytis cinerea at the dosage of 100 mu g mL(-1). Therefore, in this study, compound 5b was used as a lead compound for further optimization. (C) 2012 Elsevier Ltd. All rights reserved.
An iGlu Receptor Antagonist and Its Simultaneous Use with an Anticancer Drug for Cancer Therapy
作者:Si Yu Tan、Chung Yen Ang、Zhong Luo、Peizhou Li、Kim Truc Nguyen、Yanli Zhao
DOI:10.1002/chem.201406527
日期:2015.4.13
Glutamate receptorantagonists have been known to play a crucial role in the treatment of many neuronal diseases. Recently, these antagonists have also shown therapeutic effects in the treatment of cancer. In this study, an ionotropic glutamate (iGlu) receptorantagonist, 4‐hydroxyphenylacetyl spermine (L1), was used concurrently with a common anticancerdrug, doxorubicin (Dox), for simultaneous cancer
Multitarget directed ligands (MTDLs) are arising as promising tools to tackle complex diseases. The main goal of this work is to create powerful modulating agents for neurodegenerative disorders. To achieve this aim, we have combined fragments that inhibit key protein kinases involved in the main pathomolecular pathways of Alzheimer's disease (AD) such as tau aggregation, neuroinflammation and decreased
多靶点定向配体(MTDL)正在成为解决复杂疾病的有前景的工具。这项工作的主要目标是创造针对神经退行性疾病的强大调节剂。为了实现这一目标,我们组合了抑制参与阿尔茨海默病 (AD) 主要病理分子途径(例如 tau 聚集、神经炎症和神经发生减少)的关键蛋白激酶的片段,同时寻找 β-分泌酶 (BACE1) 中的第三种作用,负责β-淀粉样蛋白的产生。我们获得了平衡良好的 MTDL,其在三个不同相关靶标中具有体外活性,并且在两种 AD 细胞模型中具有功效。此外,计算研究证实了这些化合物如何充分适应又长又窄的 BACE1 催化位点。最后,我们采用原位点击化学,使用 BACE1 作为蛋白质模板,作为一种多功能合成工具,使我们能够获得更多 MTDL。