0000000001054069

AUTHOR

Joshua C. Goldstein

showing 2 related works from this author

p53 triggers apoptosis in oncogene-expressing fibroblasts by the induction of Noxa and mitochondrial Bax translocation.

2003

The mechanism of p53-dependent apoptosis is still only partly defined. Using early-passage embryonic fibroblasts (MEF) from wild-type (wt), p53(-/-) and bax(-/-) mice, we observe a p53-dependent translocation of Bax to the mitochondria and a release of mitochondrial Cytochrome c during stress-induced apoptosis. These events proceed independent of zVAD-inhibitable caspase activation, are not prevented by dominant negative FADD (DN-FADD), but are negatively regulated by Mdm-2. Bcl-x(L) expression prevents the release of mitochondrial Cytochrome c and apoptosis, but not Bax translocation. At a single-cell level, enforced expression of p53 is sufficient to induce Bax translocation and Cytochrom…

Fas-Associated Death Domain ProteinDown-RegulationChromosomal translocationApoptosisCytochrome c GroupMitochondrionMiceBcl-2-associated X proteinFetusDownregulation and upregulationProto-Oncogene ProteinsAnimalsFADDEnzyme InhibitorsMolecular BiologyCells CulturedAdaptor Proteins Signal Transducingbcl-2-Associated X ProteinMice KnockoutbiologyOncogeneChemistryCytochrome cCell BiologyFibroblastsMolecular biologyCell biologyMitochondriaProtein TransportGene Expression RegulationProto-Oncogene Proteins c-bcl-2ApoptosisCaspasesbiology.proteinTumor Suppressor Protein p53Carrier ProteinsCell death and differentiation
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Cytochrome c is released in a single step during apoptosis

2005

Release of cytochrome c from mitochondria is a central event in apoptotic signaling. In this study, we utilized a cytochrome c fusion that binds fluorescent biarsenical ligands (cytochrome c-4CYS (cyt. c-4CYS)) as well as cytochrome c-green fluorescent protein (cyt. c-GFP) to measure its release from mitochondria in different cell types during apoptosis. In single cells, the kinetics of cyt. c-4CYS release was indistinguishable from that of cyt. c-GFP in apoptotic cells expressing both molecules. Lowering the temperature by 7 degrees C did not affect this corelease, but further separated cytochrome c release from the subsequent decrease in mitochondrial membrane potential (DeltaPsi(m)). Cyt…

CytochromeUltraviolet RaysGreen Fluorescent ProteinsApoptosisLigandsMembrane PotentialsJurkat CellsCytochrome C1HumansCytochrome c oxidaseEnzyme InhibitorsMolecular BiologyProtein Synthesis InhibitorsMicroscopy VideobiologyTumor Necrosis Factor-alphaCytochrome bCytochrome cTemperatureCytochromes cCytochrome P450 reductaseCell BiologyStaurosporineMitochondriaCell biologyKineticsenzymes and coenzymes (carbohydrates)Coenzyme Q – cytochrome c reductaseDactinomycinbiology.proteinApoptosomeBiomarkersHeLa CellsCell Death & Differentiation
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