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Page 1 de 1174 résultats
Apoptosis and necrosis following exposure of U937 cells to increasing concentrations of hydrogen peroxide: the effect of the poly(ADP-ribose)polymerase inhibitor 3-aminobenzamide.
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A 3-hr exposure of U937 cells to hydrogen peroxide (H2O2) followed by a 6-hr posttreatment incubation in fresh culture medium promotes apoptosis or necrosis, depending on the oxidant concentration. Addition of 3-aminobenzamide (3AB) during the recovery phase prevented necrosis and caused apoptosis.
Pathophysiological role of poly(ADP-ribose) polymerase (PARP) activation during acetaminophen-induced liver cell necrosis in mice.
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DNA fragmentation in hepatocytes occurs early after acetaminophen (AAP) overdose in mice. DNA strandbreaks can induce excessive activation of poly(ADP-ribose) polymerases (PARP), which may lead to oncotic necrosis. Based on controversial findings with chemical PARP inhibitors, the role of PARP-1
Diabetes increases apoptosis and necrosis in both ischemic and nonischemic human myocardium: role of caspases and poly-adenosine diphosphate-ribose polymerase.
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OBJECTIVE
Diabetes is an important predictor of morbidity and mortality after cardiac surgery, but the reason is unclear. The aims of these studies, therefore, were to elucidate whether cell death is greater in ischemic and nonischemic diabetic human myocardium than in nondiabetic myocardium and to
Role of poly-(ADP-ribose) polymerase in transplant acute tubular necrosis and its relationship with delayed renal function.
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The enzyme poly(ADP-ribose) polymerase (PARP-1) participates in the repair of DNA damaged by genotoxic agents such as oxygen-derived free radicals. If the allograft suffers pretransplant cold ischemia and subsequent ischemia-reperfusion injury (IR), overactivation of PARP-1 can be induced, which may
Poly[ADP-ribose] polymerase-1 expression is related to cold ischemia, acute tubular necrosis, and delayed renal function in kidney transplantation.
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Cold ischemia time especially impacts on outcomes of expanded-criteria donor (ECD) transplantation. Ischemia-reperfusion (IR) injury produces excessive poly[ADP-Ribose] Polymerase-1 (PARP-1) activation. The present study explored the hypothesis that increased tubular expression of PARP-1 contributes
Poly(adenosine diphosphate ribose) polymerase inhibition prevents necrosis induced by H2O2 but not apoptosis.
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OBJECTIVE
H2O2 causes DNA damage, which activates poly(adenosine diphosphate ribose) polymerase (PARP), a nuclear enzyme that uses nicotinamide adenine dinucleotide (NAD) as a substrate. When DNA strand breaks are extensive, consumption of NAD by PARP can cause adenosine triphosphate depletion. The
Skin Necrosis of the Nose After Injection of Ribose Cross-Linked Porcine Atelocollagen.
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We report a case of skin necrosis of the nasal tip after an injection of ribose cross-linked porcine atelocollagen (Evolence; Colbar Life Science Ltd, Herzliya, Israel). A 22-year-old woman had a nasal augmentation. From the glabella to the nasal tip, 10 strokes were injected using 0.6 mL of
Different cleavage pattern for poly(ADP-ribose) polymerase during necrosis and apoptosis in HL-60 cells.
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Human promyelomonocytic leukemia cells HL-60 were treated with etoposide or cytochalasin B to induce apoptosis or necrosis, respectively. We report here that during necrosis, the DNA-repair associated nuclear enzyme poly(ADP-ribose) polymerase (PARP) was degraded differently from that observed
Tumor necrosis factor-like weak inducer of apoptosis and fibroblast growth factor-inducible 14 mediate cerebral ischemia-induced poly(ADP-ribose) polymerase-1 activation and neuronal death.
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Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) and its receptor Fibroblast growth factor-inducible 14 (Fn14) are expressed in neurons. Here we demonstrate that TWEAK induces a dose-dependent increase in neuronal death and that this effect is independent of tumor necrosis factor alpha
Tumor necrosis factor-alpha induces apoptosis associated with poly(ADP-ribose) polymerase cleavage in HT-29 colon cancer cells.
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BACKGROUND
Tumor necrosis factor-alpha (TNF-alpha) is known for its selective cytotoxic activity on tumour cells. We analysed the response of HT-29 human colon carcinoma cells to this cytokine.
METHODS
After TNF-alpha treatment, cell proliferation, cell cycle, reactive oxygen species (ROS)
CXC chemokine ligand 12 protects pancreatic β-cells from necrosis through Akt kinase-mediated modulation of poly(ADP-ribose) polymerase-1 activity.
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The diabetes prevention paradigm envisages the application of strategies that support the maintenance of appropriate β-cell numbers. Herein we show that overexpression of CXC chemokine ligand12 (CXCL12) considerably improves the viability of isolated rat Langerhans islet cells and Rin-5F pancreatic
Induction of nitric oxide synthase in L929 cells by tumour-necrosis factor alpha is prevented by inhibitors of poly(ADP-ribose) polymerase.
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The fibroblast cell line L929 contains a constitutively expressed NO synthase (EC 1.14.29.-) activity, which can be increased about 10-fold by tumour-necrosis factor alpha (TNF-alpha). Activities of the constitutive and the inducible enzymes are tetrahydrobiopterin-independent and can be inhibited
Acute myocardial infarction induced increases in plasma tumor necrosis factor-alpha and interleukin-10 are associated with the activation of poly(ADP-ribose) polymerase of circulating mononuclear cell.
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Systemic inflammatory response to acute myocardial infarction (AMI) is detrimental to heart function. In this study, we proved that poly(ADP-ribose) polymerase (PARP) activity of circulating mononuclear cell (MNC) increased significantly in post-AMI patients. MNC PARP activity was correlated
In vitro effects of poly(ADP-ribose) polymerase inhibitors on the production of tumor necrosis factor-α by interferon- γ - and lipopolysaccharide-stimulated peripheral blood mononuclear cells of horses.
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Cisplatin induces primary necrosis through poly(ADP-ribose) polymerase 1 activation in kidney proximal tubular cells.
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Treatment with cisplatin for cancer therapy has a major side effect such as nephrotoxicity; however, the role of poly (ADP-ribose) polymerase 1 (PARP1) in necrosis in response to cisplatin nephrotoxicity remains to be defined. Here we report that cisplatin induces primary necrosis through PARP1
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