已经表明端粒G-四链体的形成抑制端粒酶活性。实际上,许多能够与G-tetrads进行π堆积的小分子已显示出通过稳定G-四链体来抑制端粒酶活性的能力。姜黄素具有广泛的医学特性,从抗菌,抗病毒,原生动物,真菌和抗炎活性到抗癌活性。我们已经研究了姜黄素及其结构类似物与人类端粒序列AG 3(T 2 AG 3)3在分子拥挤条件下的相互作用。实验研究表明存在AG 3(T 2 AG 3)3 /姜黄素复合物在分子拥挤条件下的结合亲和力为0.72×10 6 M -1。紫外可见吸收光谱,荧光TO位移测定,圆二色性和分子对接研究的结果表明,姜黄素及其类似物通过G与四联体DNA相互作用。凹槽装订。尽管此处研究的姜黄素的其他类似物以定性相似的方式与G-四链体结合,但与姜黄素相比,它们的亲和力相对较低。姜黄素的甲氧基-亚苄基衍生物Knoevenagel缩合物也显示出与G-四链体DNA的显着结合,尽管亲和力下降了两倍。
A series of curcumin analogues including new 4-arylidene curcumin analogues (4-arylidene-1,7-bisarylhepta-1,6-diene-3,5-diones) were synthesized. Cell growth inhibition assays revealed that most 4-arylidene curcumin analogues can effectively decrease the growth of a panel of lung cancer cells at submicromolar and low micromolar concentrations. High content analysis technology coupled with biochemical studies showed that this new class of 4-arylidene curcumin analogues exhibits significantly improved NF-kappa B inhibition activity over the parent compound curcumin, at least in part by inhibiting I kappa B phosphorylation and degradation via IKK blockage; selected 4-arylidene curcumin analogues also reduced the tumorigenic potential of cancer cells in a clonogenic assay.
Rebeiro et al., Journal of the University of Bombay, Science: Physical Sciences, Mathematics, Biological Sciences and Medicine, 1950, vol. 19/3 A, p. 38,47, 50
作者:Rebeiro et al.
DOI:——
日期:——
Pavolini et al., Annali di Chimica, 1950, vol. 40, p. 280,289
作者:Pavolini et al.
DOI:——
日期:——
Synthesis and evaluation of antimicrobial activity of 4H-pyrimido[2,1-b]benzothiazole, pyrazole and benzylidene derivatives of curcumin
作者:Pramod K. Sahu、Praveen K. Sahu、S.K. Gupta、D. Thavaselvam、D.D. Agarwal
DOI:10.1016/j.ejmech.2012.05.020
日期:2012.8
A novel, one-pot, simple, efficient procedure for 4H-pyrimido[2,1-b]benzothiazole (4a-h), pyrazole (6a-d) and benzylidene (7a-d) derivatives of curcumin under solvent and solvent free conditions in microwave with good yield is have been synthesized. The synthesized compounds were evaluated for their antibacterial activity against gram-positive and gram-negative bacteria viz. Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella typhi, Escherichia coli, Bacillus cereus and Providencia rettgeri and antifungal activity against fungi viz Aspergillus niger, Aspergillus fumigates, Aspergillus flavus. Detailed mechanistic study shows reaction proceeds through Knoevenagel type intermediate 3a which has been suggested as key intermediate for reaction (Fig. 3). (C) 2012 Elsevier Masson SAS. All rights reserved.
Synthesis and exploration of novel curcumin analogues as anti-malarial agents
Curcumin, a major yellow pigment and active component of turmeric, has been shown to possess anti-inflammatory and anti-cancer activities. Recent studies have indicated that curcumin inhibits chloroquine-sensitive (CQ-S) and chloroquine-resistant (CQ-R) Plasmodium falciparum growth in culture with an IC50 of similar to 3.25 mu M (MIC = 13.2 mu M) and IC50 4.21 mu M (MIC = 14.4 mu M), respectively. In order to expand their potential as anti-malarials a series of novel curcumin derivatives were synthesized and evaluated for their ability to inhibit P. falciparum growth in culture. Several curcumin analogues examined show more effective inhibition of P. falciparum growth than curcumin. The most potent curcumin compounds 3, 6, and 11 were inhibitory for CQ-S P. falciparum at IC50 of 0.48, 0.87, 0.92 mu M and CQ-R P. falcipartan at IC50 of 0.45 mu M, 0.89, 0.75 mu M, respectively. Pyrazole analogue of curcumin (3) exhibited sevenfold higher anti-malarial potency against CQ-S and ninefold higher anti-malarial potency against CQ-R. Curcumin analogues described here represent a novel class of highly selective P. falcipartan inhibitors and promising candidates for the design of novel anti-malarial agents. (C) 2007 Elsevier Ltd. All rights reserved.