Treatment with temozolomide and poly(ADP-ribose) polymerase inhibitors induces early apoptosis and increases base excision repair gene transcripts in leukemic cells resistant to triazene compounds
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چکیده
منابع مشابه
Involvement of poly(ADP-ribose) polymerase in base excision repair.
Poly(ADP-ribose) polymerase (PARP) is a zinc-finger DNA binding protein that detects and signals DNA strand breaks generated directly or indirectly by genotoxic agents. In response to these lesions, the immediate poly(ADP-ribosylation) of nuclear proteins converts DNA interruptions into intracellular signals that activate DNA repair or cell death programs. To elucidate the biological function o...
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Background: Prostate cancer (Pca) is a heterogeneous disease, and current treatments are not based on molecular stratification. Poly(adenosine diphosphate [ADP]-ribose) polymerase (PARP) inhibitors have recently been found to be remarkably toxic to cells with defects in homologous recombination, particularly cells with BRCA-mutated backgrounds. Therefore, this preliminary study was designed to ...
متن کاملBase excision repair is efficient in cells lacking poly(ADP-ribose) polymerase 1.
Poly(ADP-ribose) polymerase 1 (PARP-1) is a nuclear enzyme that is activated by binding to DNA breaks induced by ionizing radiation or through repair of altered bases in DNA by base excision repair. Mice lacking PARP-1 and, in certain cases, the cells derived from these mice exhibit hypersensitivity to ionizing radiation and alkylating agents. In this study we investigated base excision repair ...
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Background: Kinesin spindle protein (KSP) plays a critical role in mitosis. Inhibition of KSP function leads to cell cycle arrest at mitosis and ultimately to cell death. The aim of this study was to suppress KSP expression by specific small-interfering RNA (siRNA) in Hep3B cells and evaluate its anti-tumor activity. Methods: Three siRNA targeting KSP (KSP-siRNA #1-3) and one mismatched-siRNA (...
متن کاملInhibition of O6-alkylguanine DNA-alkyltransferase or poly(ADP-ribose) polymerase increases susceptibility of leukemic cells to apoptosis induced by temozolomide.
High levels of expression of the DNA repair enzyme O6-alkylguanine DNA-alkyltransferase (OGAT) (EC 2.1.1.63) account for tumor cell resistance to methylating agents. Previous studies suggested that methylating triazenes might have a potential role for the treatment of acute leukemias with low levels of OGAT. In the current study, we transduced the human OGAT cDNA in OGAT-deficient leukemia cell...
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ژورنال
عنوان ژورنال: Leukemia
سال: 1999
ISSN: 0887-6924,1476-5551
DOI: 10.1038/sj.leu.2401423