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Background.  AMP-activated protein kinase (AMPK) and the translocation of glucose transporter 4 (GLUT4) protein always involve disturbance of carbohydrate metabolism.  Objective.  To determine whether the change of blood glucose in the early stage of septic rat is associated with the alteration of AMPK α  protein expression and GLUT4 protein translocation expression.  Methods.  Animal models of sepsis were induced by tail vein injection of LPS in Wistar rats. The dynamic values of blood glucose within 2 hours after injection of LPS were observed. AMPK α  protein and GLUT4 protein translocation in different tissues (such as soleus muscle and extensor digitorum longus) were assessed by western blot.   Results.  Blood glucose levels appeared to rise at 0.5 h after injection of LPS, arrived the peak value at 1 h, then fell at 1.5 h and 2 h Animals in LPS group experienced the increase of phos-AMPK α  protein and GLUT4 protein translocation expression in soleus muscle and extensor digitorum longus.  Conclusion.  The dynamic change of blood glucose, represented in a form of initiative increase and subsequent decrease in the early stage of sepsis, may be related to glycometabolism disorder in the skeletal muscle, coming down to enhancement of GLUT4 translocation expression promoted by activation of AMPK α .

Role of AMPKαin Skeletal Muscle Glycometabolism Regulation and Adaptation in relation to Sepsis