The Suppressive Effects of Bursopentine (BP5) on Oxidative Stress and NF-ĸB Activation in Lipopolysaccharide-activated Murine Peritoneal Macrophages

Cellular Physiology and Biochemistry

关键词: Nuclear factor kappa B (NF-ĸB);    Bursopentine (BP5);    Oxidative stress;    Reactive oxygen species (ROS);    Glutathione (GSH);   

DOI  :  10.1159/000337581

学科分类：分子生物学，细胞生物学和基因

来源: S Karger AG

【 摘 要 】

Background/Aim Bursopentine (BP5) is a novel thiol-containing pentapeptide isolated from chicken bursa of Fabricius, and is reported to exert immunomodulatory effects on B and T lymphocytes. It has been found that some thiol compounds, such as glutathione (GSH) and N-acetylcysteine (NAC) protect living cells from oxidative stress. This led us to investigate whether BP5 had any ability to protect macrophages from oxidative stress as well as any mechanism that might underlie this process. Methods Murine peritoneal macrophages activated by lipopolysaccharide (LPS) (2 µg/ml) were treated with single bouts (0, 25, 50, and 100 µM) of BP5. Results BP5 potently suppressed the markers for oxidative stress, including nitric oxide (NO), reactive oxygen species (ROS), lipid peroxidation, and protein oxidation. It also decreased the expression and activity of inducible nitric oxide synthase (iNOS) and promoted a protective antioxidant state by elevating GSH content and by activating the expression and activity of certain key antioxidant and redox enzymes, including glutathione peroxidase (GPx), glutathione reductase (GR), superoxide dismutase (SOD) and catalase (CAT). This suppressive effect on oxidative stress was accompanied by down-regulated expression and activity of nuclear factor kappa B (NF-ĸB). Conclusion These findings demonstrate that BP5 can protect LPS-activated murine peritoneal macrophages from oxidative stress. BP5 may have applications as an anti-oxidative stress reagent.

【 授权许可】

CC BY-NC-ND