methemoglobinemia/glutathione

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Methemoglobinemia induced by 1,2-dichloro-4-nitrobenzene in mice with a disrupted glutathione S-transferase Mu 1 gene.

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A specific substrate to Mu class glutathione S-transferase (GST), 1,2-dichloro-4-nitrobenzene (DCNB), was administered to mice with a disrupted GST Mu 1 gene (Gstm1-null mice) to investigate the in vivo role of murine Gstm1 in toxicological responses to DCNB. A single oral administration of DCNB at

Primaquine-induced hemolytic anemia: susceptibility of normal versus glutathione-depleted rat erythrocytes to 5-hydroxyprimaquine.

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Primaquine is an important antimalarial agent because of its activity against exoerythrocytic forms of Plasmodium spp. Methemoglobinemia and hemolytic anemia, however, are dose-limiting side effects of primaquine therapy. These hemotoxic effects are believed to be mediated by metabolites, although

Reduction of NO-induced methemoglobinemia requires extremely high doses of ascorbic acid in vitro.

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The objective of the present study was to investigate the treatment of nitric oxide (NO)-induced methemoglobinemia by ascorbate and its consequences on red blood cell (RBC) glutathione in vitro. RBC were obtained from five healthy volunteers. The following experiments were carried out: (1) After

Associated red cell enzyme deficiencies and their significance in a case of congenital enzymopenic methemoglobinemia.

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Examination of the red cell enzyme profile in a case of congenital methemoglobinemia has shown associated deficiencies of glutathione reductase (GR) and glutathione peroxidase (GSHPx) in addition to NADH-methemoglobin reductase deficiency. Contrary to expectations, GR and GSHPx deficiencies do not

[Cytospectrophotometric research on hemoglobin in human erythrocytes. I. The methemoglobin content in intact erythrocytes and its alteration under the influence of chromosmon, ascorbic acid, riboflavin and glutathione].

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The blood of healthy men and patients with methemoglobinemia of different genesis was incubated with chromosmon, ascorbic acid, riboflavin and glutathione, the percentage of erythrocytes with thorn-shaped protuberances-echinocytes being subsequently determined in the blood smears. The absorbtion

Structural requirements for the ferrihemoglobin-forming activity of glutathione S-conjugates of 4-dimethylaminophenol.

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4-Dimethylaminophenol (DMAP) is a suitable cyanide antidote that rapidly forms ferrihemoglobin by catalytic transfer of electrons from ferrohemoglobin to oxygen. Deleterious methemoglobinemia, because of the catalytic cycling, is prevented by side reactions of oxidized DMAP with thiols, particularly

Familial Congenital Methemoglobinemia in Pomeranian Dogs Caused by a Missense Variant in the NADH-Cytochrome B5 Reductase Gene.

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BACKGROUND In veterinary medicine, congenital methemoglobinemia associated with nicotinamide adenine dinucleotide (NADH)-cytochrome b5 reductase (b5R) deficiency is rare. It has been reported in several breeds of dogs, but little information is available about its etiology. OBJECTIVE To analyze the

Zopiclone induced methemoglobinemia and hemolytic anemia.

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OBJECTIVE To characterize the risk of methemoglobinemia and hemolytic anemia following large overdoses of zopiclone, a cyclopyrrolone hypnotic-sedative and a racemic mixture of R-zopiclone and S-zopiclone (eszopiclone). METHODS This review included all reports of zopiclone induced methemoglobinemia,

Decrease in 4-aminobiphenyl-induced methemoglobinemia in Cyp1a2(-/-) knockout mice.

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Methemoglobin formation, as well as hemoglobin or DNA adducts, are useful biomarkers of occupational exposure to certain arylamines. It has been suggested that, in liver from animals not treated with a cytochrome P450 (CYP) inducer, hepatic CYP1A2 is the major P450 involved in N-hydroxylation. This

Two novel mutations in the reduced nicotinamide adenine dinucleotide (NADH)-cytochrome b5 reductase gene of a patient with generalized type, hereditary methemoglobinemia.

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Hereditary methemoglobinemia due to reduced nicotinamide adenine dinucleotide (NADH) cytochrome b5 reductase (b5R) deficiency is classified into two types, an erythrocyte (type I) and a generalized (type II). We investigated the b5R gene of a patient with type II from a white United Kingdom (UK)

Influence of the halogen-substituent pattern of fluoronitrobenzenes on their biotransformation and capacity to induce methemoglobinemia.

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In the present study both the biotransformation patterns and the capacity to induce methemoglobinemia of a series of fluoronitrobenzenes were investigated. This was done to investigate to what extent variation in the number and position of the halogen substituents influence the metabolic fate of the

Extracorporeal circulation increases nitric oxide-induced methemoglobinemia in vivo and in vitro.

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OBJECTIVE Methemoglobinemia is a well-known side effect of nitric oxide inhalation. We tested the hypothesis whether cardiopulmonary bypass increases methemoglobin formation by nitric oxide. METHODS A two-phase study: a) a controlled, prospective in vivo study of inhaled nitric oxide treatment

Methemoglobinemia associated with loxoscelism.

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In twenty five patients who presented the cutaneous form of loxoscelism, serum haptoglobin and lactic dehydrogenase, erythrocyte glucose-6-phosphate dehydrogenase, glutathione reductase, glutathione peroxidase, methemoglobin, bilirubin and reticulocytes were investigated after bite. No hemolysis was

Methemoglobinemia and eccentrocytosis in equine erythrocyte flavin adenine dinucleotide deficiency.

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This report describes erythrocyte biochemical findings in an adult Spanish mustang mare that exhibited persistent methemoglobinemia, eccentrocytosis, and pyknocytosis that were not related to the consumption or administration of an exogenous oxidant. The methemoglobinemia was attributed to a

A novel mutation in the NADH-cytochrome b5 reductase gene of a Chinese patient with recessive congenital methemoglobinemia.

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Recessive congenital methemoglobinemia due to nicotinamide adenine dinucleotide (NADH)-cytochrome b5 reductase (b5R) deficiency is classified into 2 clinical types: type 1 (erythrocyte type) and type 2 (generalized type). We found a Chinese family with type 1 recessive congenital methemoglobinemia,

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