title: Novel glycoconjugates of diospyrin, a quinonoid plant product: synthesis and evaluation of cytotoxicity against human malignant melanoma (A375) and laryngeal carcinoma (Hep2).
abstract: 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 IC(50) 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 (IC(50) = 0.02 microM) showed the maximum increase in cytotoxicity (approximately 35-fold) over that of 1 (IC(50) = 0.82 microM). Again, when the glycosides were evaluated at a given concentration (0.1 microM) 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 (IC(50) approximately 41 microM) 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.
authors: Department of Pharmaceutical Technology, Jadavpur University, Calcutta, India.
authors: Madhushree Das
authors: MD
authors: Sarma
authors: Rina
authors: R
authors: Ghosh
authors: Amarendra
authors: A
authors: Patra
authors: Rajdeep
authors: R
authors: Chowdhury
authors: Keya
authors: K
authors: Chaudhuri
authors: Banasri
authors: B
authors: Hazra
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000138:chemical synthesis* / Q000494:pharmacology; D045744:Cell Line, Tumor; D006001:Glycoconjugates / Q000138:chemical synthesis* / Q000494:pharmacology; D006801:Humans; D007822:Laryngeal Neoplasms / Q000188:drug therapy* / Q000378:metabolism; D008545:Melanoma / Q000188:drug therapy* / Q000378:metabolism; D009285:Naphthoquinones / Q000138:chemical synthesis* / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D006001:Glycoconjugates; D009285:Naphthoquinones; D017382:Reactive Oxygen Species; C043546:diospyrin