0000000000287797

AUTHOR

Sarah J. Seitz

showing 2 related works from this author

Chemotherapy-induced apoptosis in hepatocellular carcinoma involves the p53 family and is mediatedviathe extrinsic and the intrinsic pathway

2010

We investigated the downstream mechanisms by which chemotherapeutic drugs elicit apoptosis in hepatocellular carcinoma (HCC). Genomic signatures of HCC cell lines treated with different chemotherapeutic drugs were obtained. Analyses of apoptosis pathways were performed and RNA interference was used to evaluate the role of the p53 family. Endogenous p53, p63 and p73 were upregulated in response to DNA damage by chemotherapeutic drugs. Blocking p53 family function led to chemoresistance in HCC. Stimulation and blocking experiments of the CD95-, the TNF- and the TRAIL-receptor systems revealed that cytotoxic drugs, via the p53 family members as transactivators, can trigger expression of each o…

Cancer ResearchProgrammed cell deathCarcinoma HepatocellularTumor suppressor geneDNA damagetumor suppressor protein p53membrane proteinsoligonucleotide array sequence analysiscarcinomaBiologyhepatocellularfas-associated death domain proteinAPAF1humansMembrane Potential Mitochondrialhep G2 cellsbleomycinliver neoplasmsSettore BIO/11apoptosisPrognosismitochondrialFas receptorcaspasesOncologyApoptosisbiology.proteinCancer researchMdm2membrane potentialSignal transductionPrognosis; bleomycin; caspases; membrane potential mitochondrial; oligonucleotide array sequence analysis; tumor suppressor protein p53; membrane proteins; fas-associated death domain protein; humans; liver neoplasms; hep G2 cells; apoptosis; carcinoma hepatocellularInternational Journal of Cancer
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ΔNp73β is oncogenic in hepatocellular carcinoma by blocking apoptosis signaling via death receptors and mitochondria

2010

p73 belongs to the p53 family of transcription factors known to regulate cell cycle and apoptosis. The Trp73 gene has two promoters that drive the expression of two major p73 isoform subfamilies: TA and ΔN. In general, TAp73 isoforms show proapoptotic activities, whereas members of the N-terminally truncated (ΔN) p73 subfamily that lack the transactivation domain show antiapoptotic functions. We found that upregulation of ΔNp73 in hepatocellular carcinoma (HCC) correlated with reduced survival. Here, we investigated the molecular mechanisms accounting for the oncogenic role of ΔNp73 in HCC.ΔNp73β can directly interfere with the transcriptional activation function of the TA (containing the t…

Gene isoformCarcinoma HepatocellularMolecular Sequence DataApoptosisBiologyModels BiologicalTransactivationDownregulation and upregulationCell Line TumorHumansProtein IsoformsMolecular BiologyTranscription factorGenes DominantOligonucleotide Array Sequence Analysisbcl-2-Associated X ProteinRegulation of gene expressionBase SequenceSettore BIO/11Gene Expression ProfilingTumor Suppressor ProteinsLiver NeoplasmsNuclear ProteinsTumor Protein p73PromoterReceptors Death DomainCell BiologyCell cyclePrognosisMitochondriaCell biologyDNA-Binding ProteinsEnzyme ActivationGene Expression Regulation NeoplasticDrug Resistance NeoplasmCaspasesCancer researchTumor Suppressor Protein p53Signal transductionPrecancerous ConditionsSignal TransductionDevelopmental BiologyCell Cycle
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