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BACKGROUND Phthalates may pose a risk for perinatal developmental effects. An important question relates to the choice of suitable biological matrices for assessing exposure during this period. OBJECTIVES This study was designed to measure the concentrations of phthalate diesters or their metabolites in breast milk, blood or serum, and urine and to(More)
Akt is an important oncoprotein, and data suggest a critical role for nuclear Akt in cancer development. We have previously described a rapid (3-5 min) and P2X7-dependent depletion of nuclear phosphorylated Akt (pAkt) and effects on downstream targets, and here we studied mechanisms behind the pAkt depletion. We show that cholesterol-lowering drugs,(More)
Cellular lysis in freshly isolated hepatocytes incubated with varying concentrations of selenite could be related to the reductive metabolism of selenite. A decrease in intracellular GSH levels was observed concomitant with an increased rate of accumulation of oxidized glutathione in the incubation medium. Pretreatment of hepatocytes with an inhibitor of(More)
OBJECTIVES The objective of the present study was to investigate and describe the emissions of volatile compounds, particularly hexanal and carbon monoxide, from large- and small-scale storage of wood pellets. METHODS Air sampling was performed with Fourier transform infrared spectroscopy and adsorbent sampling in pellet warehouses, domestic storage(More)
Mdm2 inactivates the tumor suppressor p53 and Akt has been shown to be a major activator of Mdm2 in many cell types. We have investigated the regulation of Mdm2 in hepatocytes. We found that growth factor-induced Ser-166 phosphorylation of Mdm2 was inhibited by the MEK inhibitors U0126 and PD98059 in HepG2 cells and in a rat liver cell line, TRL 1215. Also,(More)
Many studies have documented P2X7 receptor functions in cells of mesenchymal origin. P2X7 is also expressed in epithelial cells and its role in these cells remains largely unknown. Our data indicate that P2X7 regulate nuclear pAkt in epithelial cells. We show that low concentration of atorvastatin, a drug inhibiting HMG-CoA reductase and cholesterol(More)
Epidemiological studies indicate that statins, cholesterol-lowering drugs, prevent aggressive prostate cancer and other types of cancer. Employing essentially non-prostate cell lines, we previously showed that statins rapidly downregulate nuclear levels of phosphorylated Akt via P2X7, a purinergic receptor recently implicated in invasive growth. Here, we(More)
3-hydroxy-3-methyl-glutaryl-CoA (HMG-CoA) reductase inhibitors, statins, are widely used cholesterol-lowering drugs and have been shown to have anticancer effects in many models. We have investigated the effect of statins on Mdm2, a p53-specific ubiquitin ligase. It was found that pravastatin induced Mdm2 phosphorylation at Ser166 and at 2A10(More)
Pre-neoplastic lesions in rodent liver often express high levels of MDM2 and lack a p53 response to DNA damage. The question we posed was whether there is a liver-specific regulation of the p53/MDM2 feedback loop and if it can be related to the development of pre-neoplastic lesions, referred to as enzyme altered foci (EAF) in rats. Acute responses of p53(More)