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1,4-Diselenophene-1,4-diketone triggers caspase-dependent apoptosis in human melanoma A375 cells through induction of mitochondrial dysfunction. 2011

Yi Luo, and Xiaoling Li, and Xiaochun Huang, and Yum-Shing Wong, and Tianfeng Chen, and Yibo Zhang, and Wenjie Zheng
Department of Chemistry, Jinan University, Guangzhou, Guangdong Province, China.

Epidemiological, preclinical and clinical studies have supported the role of selenocompounds as potential cancer chemopreventive and chemotherapeutic agents. In this study, a novel selenophene-based compound, 1,4-diselenophene-1,4-diketone (DSeD), has been synthesized by Double Friedel-Crafts reaction and identified as a potent antiproliferative agent against a panel of six human caner cell lines. Despite this potency, DSeD was relatively nontoxic toward human normal cells, HS68 fibroblasts and HK-2 kidney cells. These results suggest that DSeD possesses great selectivity between cancer and normal cells. Induction of apoptosis in human melanoma A375 cells by DSeD was evidenced by accumulation of sub-G1 cell population, DNA fragmentation and nuclear condensation. Activation of caspase-9 and depletion of mitochondrial membrane potential indicated the initiation of the mitochondria-mediated apoptosis pathway. Pretreatment of cells with general caspase inhibitor z-VAD-fmk and caspase-9 inhibitor z-LEHD-fmk significantly suppressed the cell apoptosis, demonstrating the important roles of caspase and mitochondria in DSeD-induced apoptotic cell death. Furthermore, DSeD-induced apoptosis was found independent of reactive oxygen species generation. Taken together, our results suggest that DSeD induces caspase-dependent apoptosis in A375 cells through activation of mitochondria-mediated apoptosis pathway.

UI MeSH Term Description Entries
D007659 Ketones Organic compounds containing a carbonyl group Ketone
D008545 Melanoma A malignant neoplasm derived from cells that are capable of forming melanin, which may occur in the skin of any part of the body, in the eye, or, rarely, in the mucous membranes of the genitalia, anus, oral cavity, or other sites. It occurs mostly in adults and may originate de novo or from a pigmented nevus or malignant lentigo. Melanomas frequently metastasize widely, and the regional lymph nodes, liver, lungs, and brain are likely to be involved. The incidence of malignant skin melanomas is rising rapidly in all parts of the world. (Stedman, 25th ed; from Rook et al., Textbook of Dermatology, 4th ed, p2445) Malignant Melanoma,Malignant Melanomas,Melanoma, Malignant,Melanomas,Melanomas, Malignant
D008928 Mitochondria Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed) Mitochondrial Contraction,Mitochondrion,Contraction, Mitochondrial,Contractions, Mitochondrial,Mitochondrial Contractions
D009842 Oligopeptides Peptides composed of between two and twelve amino acids. Oligopeptide
D002470 Cell Survival The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability. Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D005609 Free Radicals Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. Free radicals include reactive oxygen and nitrogen species (RONS). They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated. Free Radical
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000590 Amino Acid Chloromethyl Ketones Inhibitors of SERINE ENDOPEPTIDASES and sulfhydryl group-containing enzymes. They act as alkylating agents and are known to interfere in the translation process. Peptide Chloromethyl Ketones,Chloromethyl Ketones, Peptide,Ketones, Peptide Chloromethyl
D000970 Antineoplastic Agents Substances that inhibit or prevent the proliferation of NEOPLASMS. Anticancer Agent,Antineoplastic,Antineoplastic Agent,Antineoplastic Drug,Antitumor Agent,Antitumor Drug,Cancer Chemotherapy Agent,Cancer Chemotherapy Drug,Anticancer Agents,Antineoplastic Drugs,Antineoplastics,Antitumor Agents,Antitumor Drugs,Cancer Chemotherapy Agents,Cancer Chemotherapy Drugs,Chemotherapeutic Anticancer Agents,Chemotherapeutic Anticancer Drug,Agent, Anticancer,Agent, Antineoplastic,Agent, Antitumor,Agent, Cancer Chemotherapy,Agents, Anticancer,Agents, Antineoplastic,Agents, Antitumor,Agents, Cancer Chemotherapy,Agents, Chemotherapeutic Anticancer,Chemotherapy Agent, Cancer,Chemotherapy Agents, Cancer,Chemotherapy Drug, Cancer,Chemotherapy Drugs, Cancer,Drug, Antineoplastic,Drug, Antitumor,Drug, Cancer Chemotherapy,Drug, Chemotherapeutic Anticancer,Drugs, Antineoplastic,Drugs, Antitumor,Drugs, Cancer Chemotherapy
D015853 Cysteine Proteinase Inhibitors Exogenous and endogenous compounds which inhibit CYSTEINE ENDOPEPTIDASES. Acid Cysteine Proteinase Inhibitor,Cysteine Protease Inhibitor,Cysteine Protease Inhibitors,Cysteine Proteinase Antagonist,Cysteine Proteinase Antagonists,Cysteine Proteinase Inhibitor,Cysteine Proteinase Inhibitors, Endogenous,Cysteine Proteinase Inhibitors, Exogenous,alpha-Cysteine Protease Inhibitor,Acid Cysteine Proteinase Inhibitors,alpha-Cysteine Protease Inhibitors,Antagonist, Cysteine Proteinase,Antagonists, Cysteine Proteinase,Inhibitor, Cysteine Protease,Inhibitor, Cysteine Proteinase,Inhibitor, alpha-Cysteine Protease,Inhibitors, Cysteine Protease,Inhibitors, Cysteine Proteinase,Inhibitors, alpha-Cysteine Protease,Protease Inhibitor, Cysteine,Protease Inhibitor, alpha-Cysteine,Protease Inhibitors, Cysteine,Protease Inhibitors, alpha-Cysteine,Proteinase Antagonist, Cysteine,Proteinase Antagonists, Cysteine,Proteinase Inhibitor, Cysteine,Proteinase Inhibitors, Cysteine,alpha Cysteine Protease Inhibitor,alpha Cysteine Protease Inhibitors

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