Air breathing, especially oxygen therapy, exposes the lung to reactive oxygen species (ROS). Antioxidant enzymes (AOEs) may protect the lung from ROS-mediated injury. Because expression of the key AOEs increases in several animal species during gestation, we investigated (1) the messenger RNA (mRNA) and activity levels of the key AOEs manganese and copper-zinc superoxide dismutases (MnSOD and C...

The present study aimed to evaluate the protective effect of crocin on gastric mucosal lesions caused by ischemia-reperfusion (I/R) injury in rats. Forty male rats were randomly divided into sham, control (I/R injury) and three crocin-pretreated groups. To induce I/R lesions, the celiac artery was clamped for 30 min and then the clamp was removed to allow reperfusion for 3 h. Pretreated-rats re...

cDNA encoding glutathione peroxidase (GPx) mRNA of the white shrimp Litopenaeus vannamei was obtained from haemocytes by a reverse-transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA (RACE) using oligonucleotide primers based on the GPx sequence of Homo sapiens (NM002083), Mus musculus (NM008160), Arabidopsis thaliana (U94495), Bos taurus (NM174770), and Capsicum ch...

For imitating the active site of antioxidant selenoenzyme glutathione peroxidase (GPx), an artificial enzyme selenosubtilisin was employed as a scaffold for reconstructing substrate glutathione (GSH) specific binding sites by a bioimprinting strategy. GSH was first covalently linked to selenosubtilisin to form a covalent complex GSH-selenosubtilisin through a Se-S bond, then the GSH molecule wa...

Glutathione peroxidase (GPX)-1 and gastrointestinal (GI) epithelium-specific GPX (GPX-GI), encoded by Gpx1 and Gpx2, provide most GPX activity in GI epithelium. Although homozygous mice deficient in either the Gpx1 or Gpx2 gene appeared to be normal under standard housing conditions, homozygous mice deficient in both genes, double-knockout (KO) mice, had symptoms and pathology consistent with i...

BACKGROUND Oxidative stress (OxS) has recently been linked with osteoporosis; however, we do not know the influence of OxS as an independent risk factor for this disease. METHODS We conducted a case-control study in 94 subjects > or =60 years of age, 50 healthy and 44 with osteoporosis. We measured total antioxidant status, plasma lipid peroxides, antioxidant activity of superoxide dismutase ...

The aim of this study was to determine the activity of superoxide dismutase (SOD), glutathione peroxidase (GPx), total antioxidant status (TAS) and accumulation of Hsp70 in porcine ovarian granulosa cells after deoxynivalenol (DON) and zearalenone (ZEA) exposure in vitro. Porcine ovarian granulosa cells were incubated with DON/ZEA administrations as follows: group A (10/10 ng/mL), group B (100/...

Activities of superoxide dismutase (SOD) and glutathione peroxidase (GPx) in leaf crude extracts of different cultivars (small leaf, SL; big leaf, BL; thin leaf, TL) of Liriope spicata L. were detected on 10% SDS-PAGE gels. All cultivars contained different Cu/Zn SOD isozymes with molecular masses between 30 and 50 kDa, which were identified by inhibitor tests. They also contained different GPx...

BACKGROUND Colorectal cancer is one of the most common carcinomas observed in humans. Recently we have reported that increased oxidative stress is associated with human colorectal cancer. There are few and controversial studies on the clinical relevance of the expression of heat shock protein 70 (HSP 70), a member of the HSP family, in colorectal cancer. In this study, we assayed lipid peroxide...

Objective: The purpose of the present study was investigation of eight weeks high intensity interval (HIIT) along with curcumin supplementation on liver Glutathione Peroxidase (GPX) Activity & Malondialdehyde (MDA) Concentration among diabetic male rats. Materials and Methods: Thirty-two male mice were divided to four groups of control-diabetic, exercise-diabetic, supplementary-diabetic, and e...