Novel glycoconjugates of diospyrin, a quinonoid plant product: synthesis and evaluation of cytotoxicity against human malignant melanoma (A375) and laryngeal carcinoma (Hep2)
Novel glycoconjugates of diospyrin, a quinonoid plant product: synthesis and evaluation of cytotoxicity against human malignant melanoma (A375) and laryngeal carcinoma (Hep2)
作者:Madhushree Das Sarma、Rina Ghosh、Amarendra Patra、Rajdeep Chowdhury、Keya Chaudhuri、Banasri Hazra
DOI:10.1039/b707851j
日期:——
Glycoside derivatives of diospyrin (1) were synthesized for the first time, and the cytotoxicity of the novel compounds vis-à-vis their precursors were evaluated against two human cancer cell lines, viz. malignant melanoma (A375) and laryngeal carcinoma (Hep2). The IC50 values were in the low micromolar range for all the compounds tested, and A375 cells showed comparatively greater sensitivity than Hep2. Most of the compounds exhibited enhanced activity as compared to the plant-derived quinonoid precursor of the series (1), while the aminophenyl mannosyl (6) was found to be the most effective derivative. In A375 cells, 6 (IC50 = 0.02 µM) showed the maximum increase in cytotoxicity (∼35-fold) over that of 1 (IC50 = 0.82 µM). Again, when the glycosides were evaluated at a given concentration (0.1 µM) for their relative capacity to generate ROS from A375 cells, the compound 6 could produce the highest amount of ROS. Incidentally, this derivative also showed a comparatively lower toxicity (IC50
∼ 41 µM) when tested against normal human peripheral blood mononuclear cells, indicating a fair prospect of its development as a novel chemotherapeutic agent for the treatment of malignant melanoma.
Synthesis and antiproliferative activity of some novel derivatives of diospyrin, a plant-derived naphthoquinonoid
作者:Madhushree Das Sarma、Rina Ghosh、Amarendra Patra、Banasri Hazra
DOI:10.1016/j.bmc.2007.03.050
日期:2007.6.1
Derivatisation of diospyrin, a bisnaphthoquinonoid isolated fromDiospyrosmontanaRoxb., led to the modification of its inhibitory activity, in vitro, towards a murine tumour model, Ehrlich ascites carcinoma (EAC), and two human cancer cell lines, viz., malignant skin melanoma (A375) and epidermoid laryngeal carcinoma (Hep2). Among the novel derivatives, an epoxide exhibited the maximum antiproliferative