唾液酸酶是关键的毒力因子,可从宿主细胞表面聚糖中去除唾液酸,从而暴露促进细菌粘附和定植的受体。在这项研究中,我们开发了治疗由肺炎链球菌 Nan A 引起的细菌感染的潜在药物,该药物使用姜黄和姜黄素类似物抑制细菌唾液酸酶。还描述了设计、综合和结构分析关系(SAR)研究。对合成衍生物的评估表明,化合物 5e 是肺炎链球菌唾液酸酶最有效的抑制剂(IC50 = 0.2 ± 0.1 µM)。该化合物的抑制活性比姜黄素提高了 3.0 倍,并表现出竞争性抑制作用。这些结果值得进一步研究证实抗肺炎球菌活性 5e 并表明姜黄素衍生物可能用于治疗细菌感染引起的脓毒症。
Bivalent multifunctional ligands targeting Aβ oligomers as treatment for Alzheimer's disease
申请人:Zhang Shujin
公开号:US09260473B2
公开(公告)日:2016-02-16
Bivalent multifunctional Aβ oligomerization inhibitors (BMAOIs) that target multiple risk factors involved in Alzheimer's disease are provided. The BMAOIs are useful for the treatment and/or prevention of Alzheimer's disease, as well as for diagnostic imaging of Aβ plaques in brain tissue. The BMAOIs comprise i) an Aβ oligomer (ApO)-inhibitor moiety which may have antioxidant activity (e.g. curcumin, curcumin derivatives, curcumin hybrids, resveratrol, etc.); ii) a cell membrane/lipid raft (CM/LR) anchoring moiety (e.g. cholesterol, cholesterylamine, a steroid, etc.); and iii) a spacer or linker moiety that stably links i) and ii) together.
本发明公开了姜黄素‑4‑OCH 2 CO 2 H锶,公开了它的制备方法,公开了它的抗骨质疏松活性,因而本发明公开了它在制备抗骨质疏松药物中的应用。
“Clicked” Bivalent Ligands Containing Curcumin and Cholesterol As Multifunctional Aβ Oligomerization Inhibitors: Design, Synthesis, and Biological Characterization
作者:James A. Lenhart、Xiao Ling、Ronak Gandhi、Tai L. Guo、Phillip M. Gerk、Darlene H. Brunzell、Shijun Zhang
DOI:10.1021/jm100601q
日期:2010.8.26
In our effort to develop multifunctional compounds that cotarget beta-amyloid oligomers (A beta Os), cell membrane/lipid rafts (CM/LR), and oxidative stress, a series of bivalent multifunctional A beta oligomerization inhibitors (BMAOIs) containing cholesterol and curcumin were designed, synthesized, and biologically characterized as potential treatments for Alzheimer's disease (AD). The in vitro assay results established that the length of spacer that links cholesterol and curcumin and the attaching position of the spacer on curcumin are important structural determinants for their biological activities. Among the BMAOIs tested, 14 with a 21-atom-spacer was identified to localize to the CM/LR of human neuroblastoma MC65 cells, to inhibit the formation of A beta Os in MC65 cells, to protect cells from A beta Os-induced cytotoxicity, and to retain antioxidant properties of curcumin. Furthermore, 14 was confirmed to have the potential to cross the blood-brain barrier (BBB) as demonstrated in a Caco-2 cell model. Collectively, these results strongly encourage further optimization of 14 as a new hit to develop more potent BMAOIs.
No-carrier-added radiohalogenations utilizing organoboranes: The synthesis of iodine-123 labeled curcumin
作者:George W. Kabalka、Min-Liang Yao
DOI:10.1016/j.jorganchem.2008.11.040
日期:2009.5
The use of organoborane intermediates for radiohalogenations is briefly reviewed. The synthesis of an iodine-123 labeled curcumin derivative using a newly developed radio-iodination technique is reported. (C) 2008 Elsevier B.V. All rights reserved.