Relation of Bile Hydrogen Peroxide Level and Liver Super Oxide Dismutase Activity in Selenium-Deficient Rats

Abstract

The relationship of hydrogen peroxide (H 2 O 2 ) levels in bile with liver SOD and GSH Px activity in selenium (Se)-deˆcient rats is discussed. Normal rats and 7 groups of rats fed a Se-deˆcient diet with diŠerent feeding periods were examined. H 2 O 2 levels in bile were measured using the spin-trapping method with electron spin resonance (ESR). Bile H 2 O 2 levels in the initial stage (20 60 min from start of the cannulation) of measurement were increased depending on the length of the feeding period with the Se-deˆcient diet and absence of Se. Bile H 2 O 2 levels in the later stage (60 120 min) of measurementˆrst increased with the length of feeding with the Se-deˆcient diet and then decreased with longer feeding periods. Bile H 2 O 2 levels immediately after the operation were relatively low in almost all cases. The operation may result in oxidative stress to generate H 2 O 2 . Liver GSH Px activity decreased depending on the length of the feeding period with the Se-deˆcient diet and existence of Se. Liver SOD activity increased in Se-deˆcient groups. It is suggested that the H 2 O 2 levels in bile are related to decreased GSH Px activity, SOD activity, and also the oxidative stress caused by surgery. Therefore the H 2 O 2 levels in bile can be used as an index of sensitivity to oxidative stress. Although severe oxidative stress may decrease SOD activity, Se deˆciency can induce liver SOD activity.Key words-oxidative stress; X band ESR; Fenton's reaction; spin trapping; hydroxyl radical; glutathione peroxidase

Kinetic Changes of Oxidative Stress and Selenium Status in Plasma and Tissues following Burn Injury in Selenium-Deficient and Selenium-Supplemented Rats

“…We also observed that when the Se-GPx activity decreases, an SOD activation occurs in the selenium-depleted animals. The same results were published by Matsumoto et al 37 for selenium-deficient rats. This SOD activation might be related to the deficiency of the GPx activity, underlying a compensatory mechanism that is worth studying.…”

Electron paramagnetic resonance decay constant and oxidative stresses in liver microsomes of the selenium-deficient rat

“…Which cytochrome P-450 may be induced is under investigation. Regular purchasable Wistar rats were used as a control of comparison with the SeD rats in a series of our reports [3][4][5][6][7][8]16], although the SeD diet supplemented with Se should be used as a control. Se contents in the normal diet (CE-2, CLEA Japan, Tokyo, Japan) and the SeD diet (Oriental Yeast) were 0.86F0.03 and 0.017F0.002 mg/kg (meanFS.D.…”

“…Se in mammals is in, primarily, glutathione peroxidase (GSH-Px), which reduces hydrogen peroxide (H 2 O 2 ) using glutathione (GSH) as the cofactor. Feeding rat on a Se-deficient (SeD) diet reduces tissues' Se levels, notably in liver, in accordance with the Se contents of the diet [2] and/or the feeding period [3]. Selenium-deficient diet results in decreased GSH-Px activity and oxidative stress due to the increasing level of tissues' H 2 O 2 [4].…”

Cloning and expressions of chop in loach (Misgurnus anguillicaudatus) and its response to hydrogen peroxide (H2O2) stress

“…For example, when oxidative stress occurred, the activities of SOD and CAT in gills of zebra sh signi cantly dropped (Jin et al 2015). Analogous results were also found in mice liver and spleen (Meng et al 2004;Matsumoto et al 2002). Not only that, oxidative stress accounted for reduces in GPX activities of gills and livers in black porgy (Chen et al 2009), as well as in spleen of zebra sh (Komoike and Matsuoka 2013).…”