Does oxidative stress contribute to antituberculosis drug resistance?

Oxidative Stress, Nrf2, and Epigenetic Modification Contribute to Anticancer Drug Resistance

Nuclear factor E2-related factor 2 (Nrf2), a transcription factor, controls the expression of genes encoding cytoprotective proteins, including antioxidant enzymes that combat oxidative and electrophilic stress to maintain redox homeostasis. However, recent studies demonstrated that, in cancer, aberrant activation of Nrf2 by epigenetic alterations promotes high expression of cytoprotective prot...

Primary drug resistance of Mycobacterium tuberculosis to antituberculosis drugs.

Thirty two positive sputa from 104 untreated cases of pulmonary tuberculosis, were tested for sensitivities against antituberculosis drugs. Twenty four were positive on direct smear as well as culture while 8 were only culture positive. Nine (28%) were resistant to Isoniazid, 3 (9.4%) to Streptomycin and 2 (6.3%) were resistant to both the drugs. All the 32 were sensitive to Rifampicin and Etha...

Does 20-hydroxyeicosatetraenoic acid contribute to sex differences in cardiovascular risk by increasing oxidative stress?

Previous studies have indicated that there are large sex differences in the incidence of hypertension, and the role of androgens in enhancing the risk of cardiovascular disease is well recognized.1,2 However, the mechanisms by which androgens increase blood pressure are poorly understood. Recent studies have demonstrated that androgen-sensitive forms of hypertension are associated with increase...

Redundant hydrogen peroxide scavengers contribute to Salmonella virulence and oxidative stress resistance.

Salmonella enterica serovar Typhimurium is an intracellular pathogen that can survive and replicate within macrophages. One of the host defense mechanisms that Salmonella encounters during infection is the production of reactive oxygen species by the phagocyte NADPH oxidase. Among them, hydrogen peroxide (H(2)O(2)) can diffuse across bacterial membranes and damage biomolecules. Genome analysis ...

Oxidative Stress Resistance Virulence and Salmonella Contribute to Redundant Hydrogen Peroxide Scavengers