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Histone deacetylase inhibitors require caspase activity to induce apoptosis in lung and prostate carcinoma cells. 2006

Jürgen Sonnemann, and Maite Hartwig, and Andrea Plath, and K Saravana Kumar, and Cornelia Müller, and James F Beck
Peter Holtz Research Center of Pharmacology and Experimental Therapeutics, Ernst Moritz Arndt University, Greifswald, Germany.

Histone deacetylase inhibitors (HDIs) are a promising new class of antineoplastic agents with the capacity to induce growth arrest and/or apoptosis of cancer cells. However, their precise mechanism of action is uncertain; particularly, the role of caspases in the apoptotic response to HDIs is controversial. Here, we show that the HDIs explored, suberoylanilide hydroxamic acid, sodium butyrate and trichostatin A, activated caspase-3 in A549 and PC-3 carcinoma cells. Additionally, the poly-caspase inhibitor z-VAD-fmk prevented HDI-induced apoptosis, as judged by determining mitochondrial membrane potential and by quantifying internucleosomal DNA fragmentation. Importantly, z-VAD-fmk also significantly inhibited HDI-elicited cell death, as assessed by measuring propidium iodide uptake. As an accessory finding, with the inhibition of caspases, a HDI-induced G2-M arrest became evident. Taken together, these results provide evidence that HDIs require activated caspases to induce apoptosis of carcinoma cells.

UI MeSH Term Description Entries
D008175 Lung Neoplasms Tumors or cancer of the LUNG. Cancer of Lung,Lung Cancer,Pulmonary Cancer,Pulmonary Neoplasms,Cancer of the Lung,Neoplasms, Lung,Neoplasms, Pulmonary,Cancer, Lung,Cancer, Pulmonary,Cancers, Lung,Cancers, Pulmonary,Lung Cancers,Lung Neoplasm,Neoplasm, Lung,Neoplasm, Pulmonary,Pulmonary Cancers,Pulmonary Neoplasm
D008297 Male Males
D011471 Prostatic Neoplasms Tumors or cancer of the PROSTATE. Cancer of Prostate,Prostate Cancer,Cancer of the Prostate,Neoplasms, Prostate,Neoplasms, Prostatic,Prostate Neoplasms,Prostatic Cancer,Cancer, Prostate,Cancer, Prostatic,Cancers, Prostate,Cancers, Prostatic,Neoplasm, Prostate,Neoplasm, Prostatic,Prostate Cancers,Prostate Neoplasm,Prostatic Cancers,Prostatic Neoplasm
D004791 Enzyme Inhibitors Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme
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
D017209 Apoptosis A regulated cell death mechanism characterized by distinctive morphologic changes in the nucleus and cytoplasm, including the endonucleolytic cleavage of genomic DNA, at regularly spaced, internucleosomal sites, i.e., DNA FRAGMENTATION. It is genetically programmed and serves as a balance to mitosis in regulating the size of animal tissues and in mediating pathologic processes associated with tumor growth. Apoptosis, Extrinsic Pathway,Apoptosis, Intrinsic Pathway,Caspase-Dependent Apoptosis,Classic Apoptosis,Classical Apoptosis,Programmed Cell Death,Programmed Cell Death, Type I,Apoptoses, Extrinsic Pathway,Apoptoses, Intrinsic Pathway,Apoptosis, Caspase-Dependent,Apoptosis, Classic,Apoptosis, Classical,Caspase Dependent Apoptosis,Cell Death, Programmed,Classic Apoptoses,Extrinsic Pathway Apoptoses,Extrinsic Pathway Apoptosis,Intrinsic Pathway Apoptoses,Intrinsic Pathway Apoptosis
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines
D053938 DNA Fragmentation Splitting the DNA into shorter pieces by endonucleolytic DNA CLEAVAGE at multiple sites. It includes the internucleosomal DNA fragmentation, which along with chromatin condensation, are considered to be the hallmarks of APOPTOSIS. DNA Degradation, Apoptotic,Apoptotic DNA Degradation,Fragmentation, DNA
D056572 Histone Deacetylase Inhibitors Compounds that inhibit HISTONE DEACETYLASES. This class of drugs may influence gene expression by increasing the level of acetylated HISTONES in specific CHROMATIN domains. HDAC Inhibitor,HDAC Inhibitors,Histone Deacetylase Inhibitor,Deacetylase Inhibitor, Histone,Deacetylase Inhibitors, Histone,Inhibitor, HDAC,Inhibitor, Histone Deacetylase,Inhibitors, HDAC,Inhibitors, Histone Deacetylase

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