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0082. Early circulating lipid and cytokine profiles prognosticate in a rat model of faecal peritonitis


In stress states, catecholamines induce lipolysis and insulin resistance with hyperglycaemia. Lipid profiles differ between surviving and non-surviving septic patients [1, 2] but, hitherto, little attention has been paid to this finding and its significance remains unknown. We used a previously characterized 72h fluid-resuscitated rat model of faecal peritonitis where prognostication can be made with high sensitivity and specificity as early as 6h from heart rate or stroke volume [3].


To determine the relationship between early changes in plasma cytokine and metabolic profiles, and their prognostic significance.


Under general anaesthesia male Wistar rats (325±15g) underwent tunneled insertion of carotid arterial and jugular venous lines, followed by i.p. injection of 4µl/g faecal slurry. They were then woken and attached to a swivel-tether system allowing free movement in their cage with, from 2h, fluid resuscitation (1:1 mix of 5% dextrose:Hartmann's) at 10ml/kg/h. An echocardiography-measured HR cut-off of 460 bpm was used to classify animals into predicted survivors or non-survivors. At 6h, animals were sacrificed for blood and tissue sampling. We here report plasma levels of IL-6, IL-10, and a metabolic profile using blood gas analysis, ELISA and enzymatic colorometric testing.


At 6h the animals manifested only mild clinical features of illness, however significant differences were seen in IL-6 and all lipid measurements between predicted survivors and non-survivors. Glucose, lactate and IL-10 levels did not differ. Table 1

Table 1


In this long-term rat model of faecal peritonitis, predicted non-survivors had a significantly different IL-6 and lipid profile as early as 6 hours after sepsis. IL-6 impacts on lipid metabolism [4] but the relationship in sepsis has not, to our knowledge, been previously described. The impact of early hypolipidaemia on outcome warrants further investigation.


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Grant acknowledgment

UK Intensive Care Foundation and NIHR

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Khaliq, W., Singer, M. 0082. Early circulating lipid and cytokine profiles prognosticate in a rat model of faecal peritonitis. ICMx 2 (Suppl 1), P2 (2014).

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