作者: Kelvin Tsai , Tai-Ger Hsu , Kuang-Ming Hsu , Hu Cheng , Tsung-Yun Liu
DOI: 10.1016/S0891-5849(01)00729-8
关键词: Gel electrophoresis 、 DNA 、 Peripheral blood mononuclear cell 、 Aerobic exercise 、 Reactive oxygen species 、 Lipid peroxidation 、 Endocrinology 、 Endonuclease 、 Molecular biology 、 Comet assay 、 Internal medicine 、 Chemistry 、 Physiology (medical) 、 Biochemistry
摘要: Abstract Reactive oxygen species produced during vigorous exercise may permeate into cell nuclei and induce oxidative DNA damage, but the supporting evidence is still lacking. By using a 42 km marathon race as model of massive aerobic exercise, we demonstrated significant degree unrepaired base oxidation in peripheral immunocompetent cells, despite concurrent increase urinary excretion 8-hydroxy-2′-deoxyguanosine. Single gel electrophoresis with incorporation lesion-specific endonucleases further revealed that oxidized pyrimidines (endonuclease III-sensitive sites) contributed to most postexercise nucleotide oxidation. The damage correlated significantly plasma levels creatinine kinase lipid peroxidation metabolites, lasted for more than 1 week following race. This phenomenon be one mechanisms behind immune dysfunctions after exhaustive exercise.