PMID: 20650768Jul 24, 2010Paper

Adrenal mitochondrial injury in early stage of sepsis in rats

Nan fang yi ke da xue xue bao = Journal of Southern Medical University
Ning LiQi-yi Zeng

Abstract

To study the pathogenesis of adrenal mitochondrial dysfunction in septic rats. Thirty SPF rats were randomized into 3 groups, including a normal control group and 2 sepsis groups receiving intraperitoneal injection of 10 mg/kg lipopolysaccharide (LPS) and observed at 6 and 24 h after the injection. The adrenal mitochondria were extracted from the rats at the corresponding time points for observation by electronic microscopy. The membrane potential of the mitochondria was detected by flow cytometry. The oxidative stress levels in the mitochondria (activities of NOS and levels of MDA and NO) were assessed. With the progression of sepsis, the serum levels of corticosterone in LPS groups increased significantly as compared with that in the control group. Ultrastructural observation of the adrenal mitochondria showed mild mitochondrial injury in LPS groups in comparison with the control group. The mitochondrial membrane potential was lowered in the LPS groups, but all these changes appeared to be reversible. The activities of NOS and the levels of MDA and NO showed no significant difference between the sepsis groups and the control group. No obvious adrenal dysfunction occurs in the early stage of sepsis in rats. Mitochondrial injur...Continue Reading

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