The glutathione content and the activities of several enzymes in its metabolism, glutathione reductase, glutathione peroxidase and γ-glutamyl transpeptidase, were assayed in uteri obtained from estrogen-treated rats and in R3230AC mammary adenocarcinomas obtained from ovariectomized, intact and estrogen-treated hosts. Normal mammary glands, obtained 10–12 days post-partum, were also examined fo...

on the antibacterial activity of commonly used and therapeutically relevant b-lactam antibiotics. The effect of glutathione (GSH) and ascorbic acid on the susceptibility of E. coli K-12 strain MG1655 to ampicillin and penicillin was investigated. MICs of these antibiotics in the presence and absence of 10 mM of these antioxidants were determined by agar dilution method as outlined by the CLSI (...

The tripeptide y-glutamyl-cysteinyl-glycine. or glutathione. protects cells against oxidative damage by its ability to react with free radicals and peroxides. From studies with human neutrophilic granulocytes deficient in glutathione metabolism. it is known that the protection by this compound is essential for the proper functioning of these cells. Previous studies have yielded conflicting esti...

In patients with chronic obstructive pulmonary disease (COPD), an imbalance between oxidants and antioxidants is acknowledged to result in disease development and progression. Cigarette smoke (CS) is known to deplete total glutathione (GSH + GSSG) in the airways. We hypothesized that components in the gaseous phase of CS may irreversibly react with GSH to form GSH derivatives that cannot be red...

OBJECTIVES The influences of Pueraria candollei var. mirifica (PM), a Thai medicinal plant with long tradition of medicinal consumption among menopausal women for rejuvenation and estrogen hormone replacement, on oxidative status in ovariectomized (OVX) mice were determined. METHODS The crude extract of PM and its active phytoestrogen, miroestrol (MR), were given to OVX mice. The effect of th...

Glutathione is the major intracellular redox buffer. We have shown that glutathione redox status, which is the balance between intracellular reduced (GSH) and oxidized (GSSG) glutathione, in antigen-presenting cells (APC) regulates the helper T cell type 1 (Th1)/Th2 balance due to the production of IL-12. Bronchial asthma is a typical Th2 disease. Th2 cells and Th2 cytokines are characteristic ...


 Purpose: To determine the effect of glutathione (GSH) suppressors styrene oxide (SO) and diethyl maleate (DEM) on hepatic expression cytochrome P450 family 1 (Cyp1) isoforms that are related to carcinogenesis including Cyp1a1, Cyp1a2, Cyp1b1.
 Methods: Seven-week-old ICR mice were intraperitoneally injected with SO (150 300 mg/kg/day), DEM (175 350 or N-acetylcysteine (NAC; 600 mg/k...

Glutathione (γ-glutamylcysteinyl-glycine, GSH) has vital functions as thiol redox buffer and cofactor of antioxidant and detoxification enzymes. Plasmodium falciparum possesses a functional GSH biosynthesis pathway and contains mM concentrations of the tripeptide. It was impossible to delete in P. falciparum the genes encoding γ-glutamylcysteine synthetase (γGCS) or glutathione synthetase (GS),...

This study investigated glutathione (GSH) homeostasis in human lung epithelial cells (A549) exposed to crocidolite. Exposure of A549 cells to 3 micrograms/cm2 crocidolite resulted in a decrease in intracellular reduced glutathione by 36% without a corresponding increase in GSH disulfide. After a 24-hr exposure to crocidolite, 75% of the intracellular GSH lost was recovered in the extracellular ...

Changes in glucose-6-phosphate dehydrogenase (G-6-PD), glutathione reductase (GSH-R), reduced glutathione (GSH), glutathione peroxidase (GSH-PO), transketolase (TK) and transaldolase (TA) were studied in lens and red blood cells (RBCs) to understand the possible biochemical mechanisms responsible for the development of senile cataract. The activity of G-6-PD was increased in lens, though not so...