Clustered damages are formed in DNA by ionising radiation and radiomimetic anticancer agents and are thought to be biologically severe. 7,8-dihydro-8-oxoguanine (8-oxoG), a major DNA damage resulting from oxidative attack, is highly mutagenic leading to a high level of G.C-->T.A transversions if not previously excised by OGG1 DNA glycosylase/AP lyase proteins in eukaryotes. However, 8-oxoG with...

Anhydrobiosis is a highly stable state of suspended animation in an organism due to its desiccation, which is followed by recovery after rehydration. Changes occurring during drying could damage molecules, including DNA. Using the anhydrobiotic tardigrade Paramacrobiotus richtersi as a model organism, we have evaluated the effects of environmental factors, such as temperature and air humidity l...

BACKGROUND Artemisia scoparia is traditionally used in the local system of medicine in kidney disorders. This study aimed at scrutinizing the nephroprotective prospective of A. scoparia methanol extract against carbon tetrachloride (CCl4) provoked DNA damages and oxidative stress in kidneys of rat. METHODS Dried aerial parts of A. scoparia were powdered and extracted with methanol to obtain t...

We explored the renal protective effects by a gut peptide, Ghrelin. Daily peritoneal injection with Ghrelin ameliorated renal damages in continuously angiotensin II (AngII)-infused C57BL/6 mice as assessed by urinary excretion of protein and renal tubular markers. AngII-induced increase in reactive oxygen species (ROS) levels and senescent changes were attenuated by Ghrelin. Ghrelin also inhibi...

the objective of the present study was to investigate the role of nanocarrier of magnetic isotope of 25-mg2+ (pmc16) in liver toxicity, atp content and oxidative stress due to malathion (mal) exposure. pmc16 nanoparticle were administered in different doses (0.05, 0.1 and 0.2 ld50) intravenously (iv) 40 minutes after a single mal (0.25 ld50= 207 mg/kg) intraperitoneal (ip) injection as a comple...

The present study investigated the beneficial role of selenium (Se) in protecting oilseed rape (Brassica napus L.) plants from cadmium (Cd+2) and lead (Pb+2) toxicity. Exogenous Se markedly reduced Cd and Pb concentration in both roots and shoots. Supplementation of the medium with Se (5, 10, and 15 mg kg-1) alleviated the negative effect of Cd and Pb on growth and led to a decrease in oxidativ...

Bilirubin above a threshold level is toxic to human system and is excreted in urinary and through gastrointestinal tract. The role of bilirubin as antioxidant is debatable. This paper aims at elucidating the role of bilirubin as an antioxidant in neonatal jaundice patients. It is observed that bilirubin up to 6 mg/dl in blood acts as an antioxidant and above 12.5 mg/dl is strongly prooxidant. P...

Acute renal damage mainly develops following toxic or ischemic insults and is defined as acute. These damages have largely been attributed to oxidative stress. Recently much attention has been directed toward decreased renal tubular cell regeneration during tubular cell injury. Antioxidants have recently been the focus of researchers and scientists for prevention and treatment of various oxidat...

A founding concept of radiobiology that deals with X-rays, γ-rays and ultraviolet light is that radiation indiscriminately damages cellular macromolecules. Mounting experimental evidence does not fit into this theoretical framework. Whereas DNA lesion-yields in cells exposed to a given dose and type of radiation appear to be fixed, protein lesion-yields are highly variable. Extremely radiation ...

Currently, oxidative stress (OS) has become a major interest in point of basic science and clinical research. The imbalance between generations and clearances of oxidants leads to OS. Oxidants are mainly composed of reactive oxygen species (ROS) and reactive nitrogen species (RNS) which are manifested as oxidized macromolecules causing deleterious effects in several organs. Lipid, protein and D...