Singlet oxygen (1O2) is produced by leucocytes during inflammatory reactions, various biochemical reactions and during photoreactions. It deactivates by reacting with a number of targets to produce reactive oxygen species (ROS) and peroxides (that in turn produce ROS). To verify whether serum had the same capability to deactivate secondary oxidants after exposure to 1O2, we provoked a photoreaction using rose bengal added to sera of 53 healthy donors and, after light delivery, reduced 2',7'-dichlorofluorescein (DCFH) was added at the end of irradiation and fluorescence of the oxidized derivative (DCF) was recorded. To avoid optical artifacts, we analyzed the influence of hemolysis. Deactivation capability of secondary oxidants after exposure to (1)O(2) was stable over a long period of time, slightly different between men and women, but standard biochemistry parameters had little influence. Hemolysis, age and platelet number reduced deactivation of 1O2-induced secondary oxidants. Addition of lysed cancer cells had no influence. Blood sampling in clot act tubes gave a better signal than in heparinized tubes. Red blood cells (RBCs) loaded with antioxidants strongly decreased deactivation of secondary oxidants. Assays are in progress to evaluate the clinical implications of these findings.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/b9pp00032a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ratiometric fluorescent aptasensor based on DNA-gated FeO@Uio-66-NH and Exo I-assisted signal amplification.
Anal Chim Acta
February 2025
Food Inspection and Quarantine Technology Center of Shenzhen Customs, Shenzhen Academy of Inspection and Quarantine, Shenzhen, 518045, PR China.
Background: Ochratoxin A (OTA) is toxic secondary metabolites produced by fungi and can pose a serious threat to food safety and human health. Due to the high stability and toxicity, OTA contamination in agricultural products is of great concern. Therefore, the development of a highly sensitive and reliable OTA detection method is crucial to ensure food safety.
View Article and Find Full Text PDFEffect of adapted ice cream on nutritional status and oral mucositis in cancer patients undergoing chemotherapy: protocol study for a randomized controlled trial.
Clin Nutr ESPEN
January 2025
Post-Graduate Program in Nutrition, Department of Nutrition, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil. Electronic address:
Background And Aims: Chemotherapy is one of the treatments of choice for patients with hematological or head and neck neoplasms. However, chemotherapy promotes elevate occurrence of adverse events and many of them directly impact nutritional status and patients' quality of life, which may include a low treatment tolerance. Suggested mechanisms include inflammation and oxidative stress as contributing factors to adverse effects of chemotherapy.
View Article and Find Full Text PDF24-epibrassinolide regulates oxytetracycline-induced phytotoxicity and its detoxification mechanism.
Ecotoxicol Environ Saf
January 2025
Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China. Electronic address:
Oxytetracycline (OTC), a crop-absorbable antibiotic, poses a health risk to humans through the food chain. Conversely, 24-epibrassinolide (EBL), a plant growth hormone, mitigates the toxic effects of various pollutants on plants. However, the mechanism by which exogenous EBL affects the growth of rape seedlings exposed to OTC remains largely unknown.
View Article and Find Full Text PDFA Study of the Different Strains of the Genus spp. on Increasing Productivity and Stress Resilience in Plants.
Plants (Basel)
January 2025
National Key Laboratory of Agricultural Microbiology, Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100086, China.
One of the most important and essential components of sustainable agricultural production is biostimulants, which are emerging as a notable alternative of chemical-based products to mitigate soil contamination and environmental hazards. The most important modes of action of bacterial plant biostimulants on different plants are increasing disease resistance; activation of genes; production of chelating agents and organic acids; boosting quality through metabolome modulation; affecting the biosynthesis of phytochemicals; coordinating the activity of antioxidants and antioxidant enzymes; synthesis and accumulation of anthocyanins, vitamin C, and polyphenols; enhancing abiotic stress through cytokinin and abscisic acid (ABA) production; upregulation of stress-related genes; and the production of exopolysaccharides, secondary metabolites, and ACC deaminase. is a free-living bacterial genus which can promote the yield and growth of many species, with multiple modes of action which can vary on the basis of different climate and soil conditions.
View Article and Find Full Text PDFThe Effects of Time-Restricted Eating on Inflammation and Oxidative Stress in Overweight Older Adults: A Pilot Study.
Nutrients
January 2025
Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL 32611, USA.
Background/objectives: Time-restricted eating (TRE) has been associated with beneficial effects for inflammation and oxidative stress; however, the effects of TRE on inflammation and oxidative stress in the aging population have not been explored.
Methods: This secondary analysis tested the effects of TRE on pro-inflammatory (hs-CRP [high-sensitivity C-reactive protein], IL-1β [interleukin 1 beta], IL-6 [interleukin 6], TNF-α [tumor necrosis factor alpha]) and oxidative stress (8-isoprostane) biomarkers in ten overweight older adults (mean age = 77.1 ± 6.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!