Human endometrial and ovarian cancer cells: histone deacetylase inhibitors exhibit antiproliferative activity, potently induce cell cycle arrest, and stimulate apoptosis. 2007

Noriyuki Takai, and Hisashi Narahara
Department of Obstetrics and Gynecology, Oita University Faculty of Medicine, Oita, Japan. takai@med.oita-u.ac.jp

Because epigenetic alterations are believed to be involved in the repression of tumor suppressor genes and promotion of tumorigenesis in endometrial cancers and ovarian cancers, novel compounds endowed with a histone deacetylase (HDAC) inhibitory activity are an attractive therapeutic approach. Clonogenic assay in soft agar and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays showed that many endometrial and ovarian cancer cell lines were sensitive to the growth inhibitory effect of HDAC inhibitors (HDACIs), although normal endometrial epithelial cells were viable after the treatment with the same doses of HDACIs that induced growth inhibition of endometrial and ovarian cancer cells. Cell cycle analysis indicated that their exposure to HDACIs decreased the proportion of cells in the S-phase and increased the proportion in the G0/G1 phases and/or G2/M phases of the cell cycle. Induction of apoptosis was confirmed by TUNEL assay, annexin V staining of externalized phosphatidylserine, and loss of the transmembrane potential of mitochondria. This induction occurred in concert with altered expression of genes related to cell growth, malignant phenotype, and apoptosis. In nude mice experiments, valproic acid significantly inhibited human endometrial and ovarian tumor growth without toxic side-effects. Although there are few clinical trials on these cancers, some clinical trials showed that HDACIs in well tolerated doses have significant antitumoral activities in another cancers. These results raise the possibility that HDACIs may prove particularly effective in the treatment of endometrial cancers and ovarian cancers.

UI MeSH Term Description Entries
D010051 Ovarian Neoplasms Tumors or cancer of the OVARY. These neoplasms can be benign or malignant. They are classified according to the tissue of origin, such as the surface EPITHELIUM, the stromal endocrine cells, and the totipotent GERM CELLS. Cancer of Ovary,Ovarian Cancer,Cancer of the Ovary,Neoplasms, Ovarian,Ovary Cancer,Ovary Neoplasms,Cancer, Ovarian,Cancer, Ovary,Cancers, Ovarian,Cancers, Ovary,Neoplasm, Ovarian,Neoplasm, Ovary,Neoplasms, Ovary,Ovarian Cancers,Ovarian Neoplasm,Ovary Cancers,Ovary Neoplasm
D002453 Cell Cycle The complex series of phenomena, occurring between the end of one CELL DIVISION and the end of the next, by which cellular material is duplicated and then divided between two daughter cells. The cell cycle includes INTERPHASE, which includes G0 PHASE; G1 PHASE; S PHASE; and G2 PHASE, and CELL DIVISION PHASE. Cell Division Cycle,Cell Cycles,Cell Division Cycles,Cycle, Cell,Cycle, Cell Division,Cycles, Cell,Cycles, Cell Division,Division Cycle, Cell,Division Cycles, Cell
D005260 Female Females
D006655 Histone Deacetylases Deacetylases that remove N-acetyl groups from amino side chains of the amino acids of HISTONES. The enzyme family can be divided into at least three structurally-defined subclasses. Class I and class II deacetylases utilize a zinc-dependent mechanism. The sirtuin histone deacetylases belong to class III and are NAD-dependent enzymes. Class I Histone Deacetylases,Class II Histone Deacetylases,HDAC Proteins,Histone Deacetylase,Histone Deacetylase Complexes,Complexes, Histone Deacetylase,Deacetylase Complexes, Histone,Deacetylase, Histone,Deacetylases, Histone
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D016889 Endometrial Neoplasms Tumors or cancer of ENDOMETRIUM, the mucous lining of the UTERUS. These neoplasms can be benign or malignant. Their classification and grading are based on the various cell types and the percent of undifferentiated cells. Cancer of Endometrium,Endometrial Cancer,Endometrial Carcinoma,Cancer of the Endometrium,Carcinoma of Endometrium,Endometrium Cancer,Neoplasms, Endometrial,Cancer, Endometrial,Cancer, Endometrium,Cancers, Endometrial,Cancers, Endometrium,Carcinoma, Endometrial,Carcinomas, Endometrial,Endometrial Cancers,Endometrial Carcinomas,Endometrial Neoplasm,Endometrium Cancers,Endometrium Carcinoma,Endometrium Carcinomas,Neoplasm, Endometrial
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
D049109 Cell Proliferation All of the processes involved in increasing CELL NUMBER including CELL DIVISION. Cell Growth in Number,Cellular Proliferation,Cell Multiplication,Cell Number Growth,Growth, Cell Number,Multiplication, Cell,Number Growth, Cell,Proliferation, Cell,Proliferation, Cellular
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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