In this dissertation, the effect of inhibitors of histone deacetylases on AML cells was investigated. The sensitivity of cells from cell lines towards trichostatin and SAHA (Vorinostat) was closely correlated. All cell lines were more sensitive towards SAHA than primary CD34+ progenitor cells. Treatment with SAHA induced cell cycle arrest in 11 of 12 cell lines. In 10 cell lines, arrest was observed in G1 phase while cells of one line, KG1a, were arrested in G2 phase. K-562 displayed cell cycle arrest in both phases. These effects depended on time and drug concentration. With increasing times of exposure and drug concentrations apoptosis became more predominant in all cell lines. The expression of pro- or antiapoptotic proteins in untreated cells was unrelated to the effects observed after exposure to SAHA. In CMK cells, myeloic and megakaryocytic differentiation was induced by SAHA. Because of their antiproliferative effects inhibitors of histone deacetylases are regarded as promising new drugs for therapy of cancer, actually they are tested in many clinical studies.
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In this dissertation, the effect of inhibitors of histone deacetylases on AML cells was investigated. The sensitivity of cells from cell lines towards trichostatin and SAHA (Vorinostat) was closely correlated. All cell lines were more sensitive towards SAHA than primary CD34+ progenitor cells. Treatment with SAHA induced cell cycle arrest in 11 of 12 cell lines. In 10 cell lines, arrest was observed in G1 phase while cells of one line, KG1a, were arrested in G2 phase. K-562 displayed cell cycle...
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