BACKGROUND The flow cytometric dihydrorhodamine 123 (DHR) assay is used as a screening test for chronic granulomatous disease (CGD), but complete myeloperoxidase (MPO) deficiency can also lead to a strongly decreased DHR signal. Our aim was to devise simple laboratory methods to differentiate MPO deficiency (false positive for CGD) and NADPH oxidase abnormalities (true CGD). METHODS We measur...

BACKGROUND Chronic granulomatous disease (CGD) is caused by mutations in genes encoding nicotinamide dinucleotide phosphate (NADPH) oxidase subunits. CASE REPORT A boy was diagnosed as having juvenile sarcoidosis because he presented with cervical and pulmonary lymphadenopathy with epitheloid cells and granuloma formation and high angiotensin converting enzyme. Later, a liver abscess was diag...

Chronic granulomatous disease is a rare inherited disorder characterised by inability of phagocytes to generate reactive oxygen species needed for intracellular killing of phagocytosed microorganisms. We report the case of an 8-month-old male child with recurrent chest infections and perianal abscess that had no response to conventional antibiotic treatment. His two elder brothers died due to s...

chronic granulomatous disease is an inherited defect in intracellular killing of ingested microorganisms characterized by recurrent life threatening bacterial and fungal infections including invasive aspergillosis in early childhood. we report  a  disseminated aspergillosis as  the  representative  of  adult  onset  chronic granulomatous disease without previous infection, with dramatic respons...

Oxidative stress and mitochondrial dysfunction play an important role in acetaminophen (APAP)-induced hepatocyte cell death. However, exact mechanisms involved in the process are controversial, in part, because of the disparity in findings between in vitro and in vivo studies. A major difference in this context is the oxygen tension, with cells in culture being exposed to 21% oxygen, whereas th...

Peroxynitrite (ONOO(-)/ONOOH), the product of the diffusion-limited reaction of nitric oxide (*NO) with superoxide (O(-*)(2)), has been implicated as an important mediator of tissue injury during conditions associated with enhanced *NO and O(-*)(2) production. Although several groups of investigators have demonstrated substantial oxidizing and cytotoxic activities of chemically synthesized pero...

Cellular defense against excessive peroxynitrite generation is required to protect against DNA strand-breaks and mutations and against interference with protein tyrosine-based signaling and other protein functions due to formation of 3-nitrotyrosine. We recently demonstrated a role of selenium-containing enzymes catalyzing peroxynitrite reduction. Glutathione peroxidase (GPx) protected against ...

Excessive free radical production by immune cells has been linked to cell death and tissue injury during sepsis. Peroxynitrite is a short-lived oxidant and a potent inducer of cell death that has been identified in several pathological conditions. Caffeic acid phenethyl ester (CAPE) is an active component of honeybee products and exhibits antioxidant, anti-inflammatory, and immunomodulatory act...