Winder, Frank G. (Trinity College, Dublin, Ireland). Peroxidatic activity of mycobacteria and relation to catalase. J. Bacteriol. 92:413-417. 1966.-Catalase from Mycobacterium smegmatis was purified about 50-fold. All fractions showed a ratio of peroxidatic activity to catalatic activity approximately the same as that of the crude extract, a ratio only about four times that given by catalase fr...

Type2 diabetes formerly known as non insulin dependent diabetes is the most common form of hyperglycemia, insulin resistance and relative insulin deficiency. The type 2 diabetes is caused due to metabolical disorder. Oxidative stress, through production of reactive oxygen species (ROS) to develop insulin resistance, beta cell dysfunction, impaired glucose tolerance there by impairing antioxidan...

the objective of this study was to evaluate effect of different concentrations of catalase in two extenders on motility, viability and lipid peroxidation bull spermatozoa during semen freezing process. thirty ejaculates collected from ten holstein bulls were pooled and evaluated at 37 °c. pool ejaculated was split into two main experimental groups, 1 and 2. in experiment 1, specimen was diluted...

Rao, P. J. (University of Illinois, Urbana), A. D. Larson, and C. D. Cox. Catalase activity in Leptospira. J. Bacteriol. 88:1045-1048. 1964.-A number of serotypes of Leptospira were found to possess catalase activity, although considerable variation in activity existed among various serotypes. Catalase activity of L. pomona was reduced by inhibitors commonly employed for arresting catalase acti...

The erythrocytes represent an important source of antioxidant capacity of the blood. Catalase (EC 1.11.1.6.) is one of the enzymatic components of their antioxidant defense system. The objective of this study was to follow erythrocyte catalase (CAT) in 7-, 15-, 21-, 35-, 60- and 90-day-old Wistar rats of both sexes in normoxia and after exposure to intensive acute hypobaric hypoxia. During the ...

Corynebacterium diphtheriae and Corynebacterium glutamicum each have one gene (cat) encoding catalase. In-frame Δcat mutants of C. diphtheriae and C. glutamicum were hyper-sensitive to growth inhibition and killing by H(2)O(2). In C. diphtheriae C7(β), both catalase activity and cat transcription decreased ~2-fold during transition from exponential growth to early stationary phase. Prototypic O...

AIM To study the relationship between the pathogenesis of lung cancer and antioxidant status and acidic media by measuring the activities of erythrocyte catalase (CAT) and carbonic anhydrase (CA). METHODS A total of 26 patients with lung cancer and 15 healthy individuals were included in the study. The CAT and CA activities of erythrocytes were defined. The catalase (CAT) activity of erythroc...

The signaling pathway that transduces the stimulatory effect of low K+ on the biosynthesis of Na,K-ATPase remains largely unknown. The present study was undertaken to examine whether reactive oxygen species (ROS) mediated the effect of low K+ in Madin-Darby canine kidney (MDCK) cells. Low K+ increased ROS activity in a time- and dose-dependent manner, and this effect was abrogated by catalase a...

OBJECTIVE Recent studies from our groups have indicated that endothelial nitric oxide synthase (eNOS) expression is increased in cell culture by both shear stress and by hydrogen peroxide (H(2)O(2)). In vivo, exercise training, known to increase both endothelial shear stress and oxidative stress, also increases eNOS expression. It is unclear if H(2)O(2) contributes to an increase in eNOS expres...

Tetragenococcus halophilus strains are the halophilic lactic acid bacteria (LAB) that present in microbial communities during soy sauce or other hyperosmotic foods’ fermentation. This species contributes to formation of volatiles fermented foods but may experience harsh conditions such as oxidative stress and osmotic The characterization oxygen tolerance T. elaboration its antioxidant mechanism...