[Damage effects of sleep deprivation on myocardium and its antioxygen index in rats].

ABSTRACT

AIM: To explore the effects of sleep deprivation (SD) on myocardium and its antioxygen index. METHODS: 35 Sprague Dawley rats were randomly divided into five groups Cage control, Tank control, SD 2 d, SD 4 d and SD 6 d. The "flower pot" technique was used to establish rats sleep deprivation model followed by record of surface electrocardiogram, detection of myocardium morphology changes under microscope and transmission electron microscope and investigation of MDA content and SOD activity of myocardial mitochondria. RESULTS: After sleep deprivation, heart rate increased and ECG showed ischemia of myocardium; subcellular organelles such as chromosome, endoplasmic reticulum, mitochondria, intercalated disk impaired, myofibril lysis or necrosis, and lipid peroxidation reaction effects spread widely; edema, bleeding of the microvessels and invasion of the monocytes could be seen in the lumen. The MDA level increased and SOD activity increased followed by a decreased trend. CONCLUSION: Sleep deprivation can induce damage on myocardium, and the stress especially oxygen stress caused by SD may be the possible mechanism.