The superoxide-producing NADPH oxidase consists of membrane-associated cytochrome b558 and cytosolic components, p47-phox and p67-phox. Recently, we have found a novel cytosolic component, p40-phox, which is tightly associated with p67-phox. In this study, we examined the translocation of p40-phox during activation of NADPH oxidase in a cell-free system using the membrane and the purified p47-p...

Superoxide radical (O2-) is ubiquitously critical to the bioactivity of endothelial nitric oxide. In angiotensin-dependent hypertension, vascular O2- levels rise and impede endothelium/nitric oxide-dependent vascular relaxation. We have reported that the major O2- source in the rabbit aorta is adventitial fibroblast phagocyte-like NADPH oxidase and shown that angiotensin (Ang) II treatment of a...

A 12 year old boy suffering from p67-phox deficient chronic granulomatous disease presented with a bullous skin disease and a lung infection with paecilomyces species. The histopathology of a bullous lesion showed subepidermal blister formation and microabcesses containing eosinophils in the dermal papillae. By direct immunofluorescence, linear staining of IgA at the dermal-epidermal junction w...

The molecular basis of the pathophysiological role of oxidative stress in autism is understudied. Herein, we used polymerase chain reaction (PCR) array to analyze transcriptional pattern of 84 oxidative stress genes in peripheral blood mononuclear cell pools isolated from 32 autistic patients (16 mild/moderate and 16 severe) and 16 healthy subjects (each sample is a pool from 4 autistic patient...

BACKGROUND Being overweight and obese increases oxidative stress in the body. To test the hypothesis that genetic variations in oxidative stress pathway genes modify the relationship between body mass index (BMI) and risk of non-Hodgkin lymphoma (NHL), we conducted a population-based case-control study in Connecticut women. METHODS Individuals who were overweight/obese (BMI ≥ 25) were compare...

Oxidative stress accompanies angiotensin (ANG) II infusion, but the role of ANG type 1 vs. type 2 receptors (AT1-R and AT2-R, respectively) is unknown. We infused ANG II subcutaneously in rats for 1 wk. Excretion of 8-isoprostaglandin F2alpha (8-Iso) and malonyldialdehyde (MDA) were related to renal cortical mRNA abundance for subunits of NADPH oxidase and superoxide dismutases (SODs) using rea...

NADPH oxidase activation involves the assembly of membrane-localized cytochrome b559 with the cytosolic components p47phox, p67phox, and the small GTPase Rac. Assembly is mimicked by a cell-free system consisting of membranes and cytosolic components, activated by an anionic amphiphile. We reported that a chimeric construct, consisting of residues 1-212 of p67phox and full-length Rac1, activate...