In this

study, we further showed that EBNA3C can negative

In this

study, we further showed that EBNA3C can negatively regulate p53-mediated functions by interacting with its regulatory proteins, the inhibitor of growth family proteins ING4 and ING5, shown to be frequently deregulated in different cancers. Functional mapping revealed that both ING4 and ING5 bound to N-terminal Selinexor domain residues 129 to 200 of EBNA3C, which was previously demonstrated to associate with p53 and is also essential for LCL growth. In addition, we showed that a conserved domain of either ING4 or ING5 bound to both p53 and EBNA3C in a competitive manner, suggesting a potential role for EBNA3C whereby the ING4 or -5/p53 pathway is modulated in EBV-infected cells. Subsequently, we demonstrated that EBNA3C significantly suppresses both the ING4- and ING5-mediated regulation of p53 transcriptional LY3039478 price activity in a dose-dependent manner. A colony formation assay as well as an apoptosis assay showed that EBNA3C nullified the negative regulatory effects on cell proliferation induced by coupled expression of p53 in the presence of either

ING4 or ING5 in Saos-2 (p53(-/-)) cells. This report demonstrates a possible role for the candidate tumor suppressor ING genes in the biology of EBV-associated cancers.”
“Previous studies have shown an excitatory effect of histamine on neurons in two Cyclin-dependent kinase 3 cerebellar nuclei, the fastigial nucleus and the interposed nucleus. Here we investigated action of histamine on the dentate nucleus (DN), another nucleus of the cerebellum, and provided more evidence for motor control by histamine via the cerebellum. Spontaneous unitary discharge of neurons in the DN was extracellularly recorded by use of cerebellar slice preparations. In total 79-recorded neurons, which were from 53 cerebellar slices, 67 neurons (84.8%) had an excitatory response to histamine stimulation, and the rest (15.2%) were not reactive. The histamine-induced

excitation of the DN neurons was not blocked by low-Ca2+/high-Mg2+ medium, demonstrating that this effect of histamine was postsynaptic. Triprolidine, an antagonist of histamine H-1 receptors, did not block the excitatory effect of histamine, but ranitidine, an antagonist for H-2 receptors, blocked the excitatory response to histamine in a concentration-dependent manner. Further, histamine H-1 receptor agonist 2-pyridylethylamine did not elicit any response of DN neurons, but H-2 receptor agonist dimaprit had an excitatory action on the DN cells and this action was blocked by ranitidine. These results indicate that histamine excites cerebellar DN neurons via histamine H-2 receptors.

Importantly, regenerating axons that do exit the graft are capabl

Importantly, regenerating axons that do exit the graft are capable of forming SC79 ic50 functional synaptic contacts. These results have been demonstrated in acute injury models in rats and cats and after a chronic injury in rats and have important implications for our continuing efforts to promote structural and functional repair after SCI.”
“Experimental evidence and clinical observations indicate that brain inflammation is an important factor in epilepsy. In particular, induction of interleukin-converting enzyme (ICE)/caspase-1 and activation

of interleukin (IL)-1 beta/IL-1 receptor type 1 axis both occur in human epilepsy, and contribute to experimentally induced Selleckchem Omipalisib acute seizures. In this study, the anticonvulsant activity of VX-765 (a selective ICE/caspase-1 inhibitor) was examined in a mouse model of

chronic epilepsy with spontaneous recurrent epileptic activity refractory to some common anticonvulsant drugs. Moreover, the effects of this drug were studied in one acute model of seizures in mice, previously shown to involve activation of ICE/caspase-1. Quantitative analysis of electroencephalogram activity was done in mice exposed to acute seizures or those developing chronic epileptic activity after status epilepticus to assess the anticonvulsant effects of systemic administration of VX-765. Histological and immunohistochemical analysis of brain tissue was carried out at the end of pharmacological experiments in epileptic mice to evaluate neuropathology, glia activation and IL-1 beta expression, and the effect of treatment. Repeated systemic administration of VX-765 significantly reduced chronic epileptic activity in mice in a dose-dependent fashion (12.5-200 mg/kg). This effect was observed at doses a parts per thousand

yenaEuro parts per thousand 50 mg/kg, Methocarbamol and was reversible with discontinuation of the drug. Maximal drug effect was associated with inhibition of IL-1 beta synthesis in activated astrocytes. The same dose regimen of VX-765 also reduced acute seizures in mice and delayed their onset time. These results support a new target system for anticonvulsant pharmacological intervention to control epileptic activity that does not respond to some common anticonvulsant drugs.”
“Recent studies of excitatory transmission in cortical interneurons reveal a surprising diversity of forms of long-term plasticity. LTP and LTD can be elicited at many synapses on interneurons, and pharmacological manipulations implicate NMDA, calcium-permeable AMPA and metabotropic receptors in the induction of plasticity. Distinct patterns are beginning to emerge in identified pathways, as defined by the cells of origin of the presynaptic glutamatergic axons and the postsynaptic interneuron subtypes.

In general, emotion processing paradigms known to probe amygdala

In general, emotion processing paradigms known to probe amygdala have not been adapted to recruit prefrontal areas. In this study we used a well-known perceptual face matching GSK2118436 cost paradigm, designed to elicit amygdala response, and asked volunteers to shift their focus in order to recruit regions responsible for attentional control. Stimuli comprised a trio of geometric shapes (circles, rectangles,

triangles) presented alongside a trio of emotional faces (angry, fear, or happy) within the same field of view, and subjects were instructed to Match Faces or Match Shapes, as a means of attending to and away from the emotional content, respectively. We observed greater amygdala reactivity to Match Faces (>Match Shapes), and greater rostral selleck screening library ACC response to Match Shapes (>Match Faces). Results indicate that simply and volitionally directing attention toward or away from emotional content correspondingly modulates amygdala and ACC activity. (C) 2012 Elsevier Ireland Ltd. All rights reserved.”
“The lymphatics began receiving attention in the scientific community as early as 1622, when Gasparo Aselli noted the appearance of milky-white vessels in the mesentery of a well-fed dog. Since this time, the lymphatic system has been historically regarded as the sewer of the vasculature, passively draining fluid and proteins from the interstitial

spaces (along with lipid from the gut) into the blood. Recent reports, however, suggest that the lymphatic role in lipid transport is an active and intricate process, and that when lymphatic function is compromised, there are systemic consequences to lipid metabolism and transport. This review highlights these recent findings, and suggests future directions for understanding the interplay between

lymphatic and lipid biology in found health and disease.”
“Aim: To examine trends in the prevalence of myocardial infarction (MI) and conventional risk factors in Greek adults between 2002 and 2006. Design: Repeated cross-sectional study.

Methods: Self-reported data from surveys given in Salamis during two election days in 2002 and 2006 were analysed. The same sampling method and procedures were used on both surveys. The study sample included 2805 and 3478 subjects (>= 20 years) in 2002 and 2006, respectively, with similar age and sex distribution to the target population.

Results: The prevalence of MI increased from 4.1 % (men, 6.3%; women, 1.9%) in 2002 to 4.8% (men, 7.3%; women, 2.2%) in 2006 (P=0.18). At the same time, prevalence rates of major risk factors were as follows: diabetes increased from 8.7% to 10.3% (P=0.037), hypertension from 20.1% to 25.7% (P<0.001) and hypercholesterolemia (cholesterol > 240mg/dl or the use of cholesterol-lowering medication) increased from 17.5% to 22.3% (P < 0.001).

As these compounds were designed to provide PET ligands with high

As these compounds were designed to provide PET ligands with high metabolic stability, they are now radiolabeled with fluorine-18 and investigated in vivo.

Methods: BFR precursors were synthesized and reacted with fluorine-18 in dry MeCN in the presence of 2,2,2-kryptofix and K2CO3. In rats, biodistribution and PET studies were performed using [F-18]5a, [F-18]5b and [F-18]5c. The binding specificity was determined by administration of non-labeled WAY-100635 prior to the radiolabeled ligands.

Results: [F-18]5 ligands were synthesized in overall radiochemical yields of 24%-45%, respectively with a radiochemical purity of >98%.

Relatively good hippocampus to cerebellum ratios of 5.55, 4.79 and 5.45, respectively were reached at 45 min pi. However, PET https://www.selleckchem.com/products/isrib-trans-isomer.html studies indicated defluorination of the radioligands by showing high accumulation of radioactivity in the bones in the order of [F-18]5a approximate to[F-18]5b>[F-18]5c.

Conclusion: Also in vivo, the radioligands bind preferentially to the 5-HT1A receptor. Unfortunately, no metabolic stability with regard to defluorination was observed in rats. (c) 2012 Elsevier Inc. All rights reserved.”
“Objective: Invasive lung tumors are associated with intercellular adhesion Selleck Nec-1s molecule-1 (ICAM-1) expression. Secretory phospholipase A(2) (sPLA(2)) enzymes produce inflammatory mediators that stimulate ICAM-1 expression,

and upregulation of PLA(2) activity can enhance metastasis. We hypothesize a link between sPLA(2) activity, ICAM-1 expression, and tumor cell invasion. We propose that inhibition of sPLA(2) modulates ICAM-1

expression in cancer cells and attenuates their invasiveness.

Methods: Human lung adenocarcinoma cells (A549) were treated with an ICAM-1 blocking antibody and assayed for invasion. Lung cancer cells (A549 and H358) were then treated with an sPLA(2) inhibitor and evaluated by immunoblotting for ICAM-1 expression. Next cells (A549) treated with sPLA(2) inhibitor were assayed for invasion. Finally, sPLA(2) messenger RNA and protein expression were evaluated by quantitative reverse-transcriptase polymerase chain reaction and immunofluorescence microscopy, respectively. Statistical analysis was performed by the Student t test or analysis of variance, as appropriate.

Results: Antibody blockade of Carfilzomib datasheet ICAM-1 decreased lung cancer cell invasion. sPLA(2) inhibition significantly reduced ICAM-1 expression and invasion. sPLA(2) inhibition also significantly decreased sPLA(2) mRNA expression and immunofluorescent staining of sPLA(2).

Conclusions: sPLA(2) plays a significant role in mediating the inflammatory signals that induce ICAM-1 expression in lung cancer cells. Inhibition of the enzyme can significantly decrease ICAM-1 expression and subsequent cancer cell invasion. This lays the groundwork for further investigation into the cellular mechanisms of sPLA(2) and its role in lung cancer.

However, our findings imply that MPH may change the neural bases

However, our findings imply that MPH may change the neural bases of auditory information processing such as the early stimulus evaluation reflected in the

P200 component. Dopamine and noradrenaline neurotransmitter systems could be responsible for the modulation of these processes. The exclusive effect of MPH on the P200 component could have a clinical application.”
“The oncogenic Epstein-Barr virus (EBV) infects the majority of the human population without doing harm and establishes a latent infection in the memory B-cell compartment. To accomplish this, EBV hijacks B-cell differentiation pathways and uses its Protein Tyrosine Kinase inhibitor own viral genes to interfere with B-cell signalling to achieve life-long persistence. EBV latent membrane protein 2A (LMP2A) provides a surrogate B-cell receptor signal essential for cell survival and is believed to have a crucial role in the maintenance of latency by blocking B-cell

activation which would otherwise lead to lytic EBV infection. These two functions demand tight control of LMP2A activity and expression levels. Based on recent insights in the function of LMP2B, an isoform of LMP2A, we propose a model for how LMP2B modulates the activity of LMP2A contributing to maintenance of EBV latency.”
“Introduction: AZD9291 clinical trial The Evaluation of the Medtronic Vascular Talent Thoracic Stent Graft System for the Treatment of Thoracic Aortic Aneurysms (VALOR) trial findings noted superior 30-day and 1-year outcomes of the Talent thoracic endograft (Medtronic Vascular, Santa Rosa, Calif) compared with surgical repair of descending thoracic aneurysms (DTAs). Data from 195 prospective thoracic endovascular aneurysm repair (TEVAR) patients treated

with the Talent device and 189 retrospective controls undergoing open surgical repair (OSR) from three centers of excellence were included in the trial after completion of TEVAR enrollment and compared. Such comparisons are biased by baseline differences among TEVAR vs OSR, however, propensity score (PS) analysis can reduce bias and validate such comparisons.

Methods: Logistic regression was used to generate a PS (range, 0-1) to identify baseline characteristics more likely in TEVAR. The PS estimated the probability that Cell Penetrating Peptide any patient would undergo TEVAR (eg, a PS of 0.99 represents a 99% chance a patient belongs to TEVAR). PSs were then generated for all patients, and TEVAR and OSR patients were divided into tertiles based on the PS to reduce up to 80% of inherent bias. Outcomes from the middle tertile (T2), patients equally likely (midrange PS) to be in TEVAR or OSR and therefore best matched, were compared using regression analysis and were also compared with the outcomes in the overall trial group.

Results: Correlates of membership in TEVAR were smaller aneurysm (P < .001), anticoagulants (P < .01), no previous abdominal aortic aneurysm (AAA) repair (P < .01), no peripheral vascular disease (P = .001), statin use (P = .002), aspirin use (P = .

Previously,

using a rat MCD model, we showed that endopla

Previously,

using a rat MCD model, we showed that endoplasmic reticulum (ER) stress in the podocytes was associated with the heavy proteinuric state and another group reported that a mammalian target of rapamycin complex 1 (mTORC1) inhibitor protected against proteinuria. In this study, which utilized a rat MCD model, a combination of immunohistochemistry, dual immunofluorescence and confocal microscopy, western blot analysis, and quantitative real-time RT-PCR revealed co-activation of the unfolded protein response (UPR), which was induced by ER stress, and mTORC1 in glomerular podocytes before the onset of proteinuria and downregulation ABT-737 molecular weight of nephrin at the post-translational level at the onset of proteinuria. Podocyte culture experiments revealed that mTORC1 activation preceded the UPR that was associated with a marked decrease in the energy charge. The mTORC1 inhibitor everolimus completely inhibited proteinuria through a reduction in both mTORC1 and UPR activity and preserved nephrin expression in the glomerular podocytes. In conclusion, mTORC1 activation may perturb the regulatory system of energy metabolism primarily

by promoting energy consumption and inducing the UPR, which underlie proteinuria in MCD. Laboratory Investigation (2011) 91, 1584-1595; doi: 10.1038/labinvest. https://www.selleckchem.com/products/azd5582.html 2011.135; published online 29 August 2011″
“Self-esteem can be defined as evaluations that individuals make about their worth as human beings. These evaluations are in part based on how we evaluate ourselves on our abilities, values, opinions, etc.

compared with others or our past or ideal self; and they are also influenced by a thought that what others may think about us. Studies to date investigating the neural mechanisms underlying individual Temsirolimus differences in self-esteem have focused mostly on the latter process (i.e. on how self-esteem is associated with neural correlates of processing feedback from others). However, given that people spend a lot of time thinking about themselves and evaluating their worth, we aimed to investigate neural mechanism underlying the association between levels of self-esteem and processing of self-relevant information. Seventeen participants completed a functional magnetic resonance imaging (fMRI) scan during which they were asked to evaluate whether a given statement is true about them (Self), an acquaintance of theirs (Other), or about general knowledge (Semantic). A whole brain correlational analysis revealed a significant negative correlation between levels of self-esteem and changes in activation of dorsal anterior cingulate gyrus (dACC, BA32) in response to evaluating self-relevant information (Self versus Other contrast).

There was a trend that smaller preoperative aortic annulus diamet

There was a trend that smaller preoperative aortic annulus diameters in group D and larger diameters in group Y were associated with increased PF-02341066 research buy aortic regurgitation over time.

Conclusion: In regard to aortic regurgitation grade over time, patients with Marfan syndrome and a large preoperative aortic annulus diameter were better treated with the reimplantation technique, whereas those with a smaller diameter were better treated with the remodeling

technique. Concomitant free-edge plication of prolapsing cusps was disadvantageous in both groups. Considering these factors may serve to improve the aortic valve longevity after valve-sparing aortic root surgery.”
“There is evidence from post-mortem and magnetic resonance imaging studies that hyperintensities, oligodendroglial abnormalities, and

gross white matter volumetric alterations are involved in the pathophysiology of bipolar disorder. There is also functional imaging evidence for a defect in frontal cortico-subcortical pathways in bipolar disorder, but the white matter comprising these pathways has not been well investigated. Few studies have investigated white matter integrity in patients with bipolar disorder compared to healthy volunteers and the majority of studies have used manual region-of-interest approaches. In this study, we compared fractional anisotropy (FA) values between 30 patients with JQ-EZ-05 datasheet bipolar disorder and 38 healthy volunteers in the brain white matter using a voxelwise analysis following intersubject registration to Talairach space. Compared to healthy volunteers, patients demonstrated significantly (p<0.001; cluster size >= 50) higher FA within the right and left frontal white matter and lower FA within the left cerebellar white matter. Examination of individual eigenvalues indicated that group differences in both axial diffusivity and radial diffusivity contributed to abnormal FA within these Phosphatidylinositol diacylglycerol-lyase regions. Tractography was performed in template space on averaged diffusion tensor imaging

data from all individuals. Extraction of bundles passing through the clusters that differed significantly between groups suggested that white matter abnormalities along the pontine crossing tract, corticospinal/corticopontine tracts, and thalamic radiation fibers may be involved in the pathogenesis of bipolar disorder. Our findings are consistent with models of bipolar disorder that implicate dysregulation of cortico-subcortical and cerebellar regions in the disorder and may have relevance for phenomenology.”
“Objective: Systolic anterior motion can complicate mitral valve repair. It can have no clinical consequence or cause low cardiac output syndrome and hypotension. The management of systolic anterior motion in the operating room remains controversial: some groups advocate nonsurgical management, and others propose immediate surgical correction. Conventional hemodynamic measures require time and can be unsuccessful.

In vivo, HK II localized exclusively to the proximal tubule Isch

In vivo, HK II localized exclusively to the proximal tubule. Ischemia reduced

total renal HK II content and dissociated HK II from proximal tubule mitochondria. In cells overexpressing HK II, Bax and HK II did not interact before or after stress. While the mechanism by which HK antagonizes Bax-mediated apoptosis is unresolved by these studies, one possible scenario is that the two proteins compete for a common binding site on the outer mitochondrial membrane. Kidney International (2011) 79, 1207-1216; doi:10.1038/ki.2010.532; published online 23 March 2011″
“Outbreaks in humans, caused by Streptococcus suis serotype PF-562271 research buy 2 (SS2), were reported in 1998 and 2005 in China. However, the mechanism of SS2-associated infection remains unclear. For the first time, a 2-D gel approach combined with MS was used to establish a comprehensive Selisistat 2-D reference map for aiding our understanding of the pathogenicity of SS2. The identification of 694 out of 834 processed spots revealed 373 proteins. Most of the identified proteins were located in the cytoplasm and were involved in energy metabolism, protein synthesis, and cellular processes. Proteins that were abundant in the 2-DE gels could be linked mainly to housekeeping

functions in carbohydrate metabolism, protein quality control and translation. 2-DE of secretory proteins was performed using IPG strips of pH 4-7. Among the 102 protein spots processed, 87 spots representing 77 proteins were successfully identified. Some virulence-associated proteins of SS2 were found, including arginine deiminase, ornithine

carbamoyl-transferase, carbamate kinase, muramidase-released protein precursor, extracellur factor, and suilysin. Enolase and endopeptidase have been proposed as putative virulence-associated factors in this study. The 2-D reference map might provide a powerful tool for analyzing Acetophenone the virulence factor and the regulatory network involved in the pathogenicity of this microorganism.”
“The volatile anesthetic, isoflurane, can protect the brain if administered before an insult such as an ischemic stroke. However, this protective “”preconditioning”" response to isoflurane is specific to males, with females showing an increase in brain damage following isoflurane preconditioning and subsequent focal cerebral ischemia. Innate cell sex is emerging as an important player in neuronal cell death, but its role in the sexually dimorphic response to isoflurane preconditioning has not been investigated. We used an in vitro model of isoflurane preconditioning and ischemia (oxygen and glucose deprivation, OGD) to test the hypotheses that innate cell sex dictates the response to isoflurane preconditioning and that 17 beta-estradiol attenuates any protective effect from isoflurane preconditioning in neurons via nuclear estrogen receptors.

The induction of PTX within these MB neurons also leads to a sign

The induction of PTX within these MB neurons also leads to a significant defect in an optimized positively reinforced short-term memory paradigm; however, this PTX-induced learning deficit is noticeably less severe than found with the negatively

reinforced paradigm. Both negatively and positively reinforced memory phenotypes are see more rescued by the constitutive expression of G(o)alpha transgenes bearing the Cys(351)Ile mutation. Since this mutation renders the G(o) molecule insensitive to PTX, the results isolate the effect of PTX on both forms of olfactory associative learning to the inhibition of the G(o) activation.”
“Skin wounds are a major social and financial burden. However, current treatments are suboptimal. The gradual comprehension of the finely orchestrated Roscovitine clinical trial nature of intercellular communication has stimulated scientists to investigate growth factor (GF) or stem cell (SC) incorporation into suitable scaffolds for local delivery into wound beds in an attempt to accelerate healing. This review provides a critical evaluation of the status quo of current research into GF and SC therapy and subsequent future prospects, including benefits and possible long-term dangers associated with their use. Additionally, we stress the importance

of a bottom-up approach in scaffold fabrication to enable controlled factor incorporation as well as production of complex scaffold micro- and nanostructures resembling that of natural extracellular matrix.”
“Staphylococcus

aureus Clp ATPases (molecular chaperones) alter normal physiological functions including an aconitase-mediated effect on Post-stationary growth, acetate catabolism, and entry into death phase (Chatterjee et at., J. Bacteriol. 2005, 187, 4488-4496). In the present study, the global function of ClpC in physiology, metabolism, and late-stationary phase survival was examined using DNA microarrays and 2-D PAGE followed by MALDI-TOF MS. The results suggest that ClpC is involved in regulating the expression of genes and/or proteins of gluconeogenesis, DOCK10 the pentose-phosphate pathway, pyruvate metabolism, the electron transport chain, nucleotide metabolism, oxidative stress, metal ion homeostasis, stringent response, and programmed cell death. Thus, one major function of ClpC is balancing late growth phase carbon metabolism. Furthermore, these changes in carbon metabolism result in alterations of the intracellular concentration of free NADH, the amount of cell-associated iron, and fatty acid metabolism. This study provides strong evidence for ClpC as a critical factor in staphylococcal energy metabolism, stress regulation, and late-stationary phase survival; therefore, these data provide important insight into the adaptation of S. aureus toward a persister state in chronic infections.”
“MicroRNAs (miRNAs) are involved in the management of hematopoiesis.

The contractile response to endothelin, angiotensin and 5-hydroxy

The contractile response to endothelin, angiotensin and 5-hydroxytryptamine receptor stimulation was studied by sensitive wire myograph. Results: Only downstream segments exhibited an augmented contractile response to stimulation with each of the three ligands, with the response towards sarafotoxin 6c being especially augmented compared to sham, upstream and contralateral controls. This functional increase did not seem to relate to ischemic tissue damage, inflammatory cell infiltration or the element this website of reperfusion. Interestingly, immunohistochemistry did not

show any difference in the level of immunoreactivity towards endothelin B (ETB) receptors between groups. Conclusion: Single artery occlusion without significant visible infarct

resulted in locally increased ETB, angiotensin type 1 and 5-hydroxytryptamine 1B receptor-mediated contractile responses only in segments located downstream of the occlusion site. This suggests lack of wall stress as an initiating trigger leading to regulation of contractile response after cerebral stroke. (C) AZD1208 mouse 2013 S. Karger AG, Basel”
“Chemokine receptors play pivotal roles for immune cell recruitment to inflammation sites, in response to chemokine gradients (chemotaxis). The mechanisms of chemokine signaling, especially the initiation of the intracellular signaling cascade, are not well understood. We previously identified a cytoplasmic protein FROUNT, which binds to the C-terminal regions of CCR2 and CCR5 to mediate chemokine

signaling. Although large amounts of purified protein are required for detailed biochemical studies and drug screening, no method to produce recombinant FROUNT has been reported. In this study, we developed a method for the production of recombinant human FROUNT. Human FROUNT was successfully expressed in Escherichia coli, as a nearly soluble protein fused to the folding chaperone Trigger Factor, with a cold shock expression system. The purified FROUNT protein displayed CCR2 binding ability without any additional components, as demonstrated by SPR measurements. A gel filtration analysis suggested that FROUNT exists in a homo-oligomeric state. This high-yield method is cost-effective for human FROUNT production. It should be a powerful tool for further biochemical and structural studies to elucidate GPCR regulation and chemokine signaling, and also will contribute to drug development. (c) 2010 Elsevier Inc. All rights reserved.”
“Background: Hydrogen peroxide (H2O2) is produced in vessels during ischemia/reperfusion and during inflammation, both leading to vascular dysfunction. We investigated cellular pathways involved in endothelial nitric oxide synthase (eNOS) phosphorylation at Threonine 495 (Thr(495)) in human umbilical vein endothelial cells (HUVECs) exposed to H2O2. Methods: HUVECs were exposed to 400 mu m H2O2 for 30 min. Phosphorylation at Thr(495) was assessed by Western blotting and reactive oxygen species (ROS) monitored by flow cytometry.