AIMS/HYPOTHESIS: The metabolic and endocrine disturbances associated with obesity and type 2 diabetes may impair the normal metabolic response to injury. Our objective was to investigate amino acid metabolism in endotoxaemic type 2 diabetic obese rats. MATERIALS AND METHODS: A metabolic study was performed over 4 days using male Zucker diabetic fatty (ZDF) rats (fa/fa) and lean littermates (fa/+) divided into three groups: ad libitum-fed groups which underwent no treatment, lipopolysaccharide (LPS)-treated groups receiving E. coli LPS by i.p. injection, and pair-fed groups to the respective LPS groups. We evaluated the effect of endotoxaemia on body weight, food intake and tissue weights. Nitrogen loss and muscular proteolysis were measured daily by determination of urinary 3-methylhistidine (3-MH) excretion. Plasma, intestine and muscle amino acid levels were measured. RESULTS: The data showed that ad libitum-fed ZDF rats had lower plasma arginine and glutamine levels than ad libitum-fed control rats. Compared with control rats, the LPS-treated ZDF rats presented lower thymic involution, a lower 3-MH:creatinine ratio and higher cumulative nitrogen balance. CONCLUSIONS/ INTERPRETATION: Against our working hypothesis, ZDF rats did not show an impaired metabolic response, and even appeared to be less sensitive to the stress.
AIMS/HYPOTHESIS: The metabolic and endocrine disturbances associated with obesity and type 2 diabetes may impair the normal metabolic response to injury. Our objective was to investigate amino acid metabolism in endotoxaemic type 2 diabetic obeserats. MATERIALS AND METHODS: A metabolic study was performed over 4 days using male Zucker diabetic fatty (ZDF) rats (fa/fa) and lean littermates (fa/+) divided into three groups: ad libitum-fed groups which underwent no treatment, lipopolysaccharide (LPS)-treated groups receiving E. coliLPS by i.p. injection, and pair-fed groups to the respective LPS groups. We evaluated the effect of endotoxaemia on body weight, food intake and tissue weights. Nitrogen loss and muscular proteolysis were measured daily by determination of urinary 3-methylhistidine (3-MH) excretion. Plasma, intestine and muscle amino acid levels were measured. RESULTS: The data showed that ad libitum-fed ZDFrats had lower plasma arginine and glutamine levels than ad libitum-fed control rats. Compared with control rats, the LPS-treated ZDFrats presented lower thymic involution, a lower 3-MH:creatinine ratio and higher cumulative nitrogen balance. CONCLUSIONS/ INTERPRETATION: Against our working hypothesis, ZDFrats did not show an impaired metabolic response, and even appeared to be less sensitive to the stress.
Authors: M Stumvoll; G Perriello; N Nurjhan; A Bucci; S Welle; P A Jansson; G Dailey; D Bier; T Jenssen; J Gerich Journal: Diabetes Date: 1996-07 Impact factor: 9.461
Authors: Brian D Piccolo; James L Graham; Kimber L Stanhope; Oliver Fiehn; Peter J Havel; Sean H Adams Journal: Am J Physiol Endocrinol Metab Date: 2016-04-19 Impact factor: 4.310