Seizure activity has been proposed to result in the generation of reactive oxygen species (ROS), which then contribute to seizure-induced neuronal damage and eventually cell death. Although the mechanisms of seizure-induced ROS generation are unclear, mitochondria and cellular calcium overload have been proposed to have a crucial role. We aim to determine the sources of seizure-induced ROS and ...

Reactive oxygen species (ROS) are involved in cell signaling, aging, and death and play a role in carcinogenesis. However, whether ROS are bystanders or active effectors of apoptosis was unclear until recently. New evidence shows that the killer lymphocyte protease granzyme B activates a conserved biochemical pathway centered on respiratory chain disruption to trigger mitocentric ROS-dependent ...

BACKGROUND A routine semen analysis is a first step in the laboratory evaluation of the infertile male. In addition, other tests such as measurement of reactive oxygen species can provide additional information regarding the etiology of male infertility. The objective of this study was to investigate the association of semen parameters with reactive oxygen species (ROS) in two groups: healthy d...

Physiological processes, as aerobic metabolism and inflammatory response, generate reactive oxygen species (ROS) that may induce cellular injury when their amount is increased and antioxidant defense mechanisms are overwhelmed. Also, ROS are generated following UV skin irradiation able to deplete the natural antioxidant defenses in the skin. The increase in exposure to UV may lead to photoaging...

This mini-review summarizes briefly main facts and speculations on roles of reactive oxygen species (ROS) in plant interactions with pathogenic microflora. Examples relating the infection-induced oxidative burst with innate or acquired resistance or susceptibility are provided. Agents triggering ROS production, ROS sources and ROS-involving defense reactions are listed. Special attention has be...

Free radicals derived from molecular oxygen and nitrogen are highly reactive metabolites called reactive oxygen species (ROS). Cells continuously produce free radicals and ROS as part of the metabolic process. They are involved in the various functions of the reproductive system. Antioxidants are enzymes or compounds that scavenge and reduce the presence of free radicals. Normally, a balance ex...

Abbreviations: ESKAPE: Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter Baumanni, Pseudomonas Aeruginosa, and Enterobacter species; FI: Faecal Incontinence; LED: Light Emitting Diode; PDT: Photodynamic Therapy; ROS: Reactive Oxygen Species; rUTI: Recurrent UTI; UI: Urinary UTI: Tract Infection; uUTI: Uncomplicated human UTI

Reactive oxygen species (ROS) are a group of compounds derived from the incomplete reduction of molecular oxygen. They are highly reactive molecules that consist of a number of diverse chemical species including superoxide anion(O2 .− ), hydroxyl radical (-OH), and hydrogen peroxide (H2O2). Primary physiological source of ROS is cellular respiration. During respiration, electrons are passed thr...