A study of parenteral versus enteral nutrition following caecal ligation and puncture in the rat: Influence on survival and tissue protein turnover

Clinical Nutrition : Official Journal of the European Society of Parenteral and Enteral Nutrition
Christopher J ScarlettRoss C Smith

Abstract

Methods of nutritional management in abdominal sepsis remain controversial. Sprague Dawley rats were either fed via a central line in the right internal jugular vein or duodenally via a gastrostomy tube, and were randomised to undergo either caecal ligation and puncture (CLP) or laparotomy only. Post-operatively, animals received either parenteral nutrition, enteral nutrition or saline only (parenteral and enteral nutrition protocols were isocaloric and isonitrogenous). After 72 h, fractional rate of protein synthesis (Ks, %/day) was measured in gastrocnemius muscle and liver, and protein breakdown was measured in incubated epitrochlearis muscles. Serum insulin-like growth factor-I (IGF-I), acid-labile subunit (ALS) and IGF binding protein-1 (IGFBP-1) levels were determined by specific radioimmunoassay methods. After CLP, when compared with starved animals, only enteral nutrition resulted in a significant decrease in survival to 72 h (P < 0.001). Parenteral nutrition, but not enteral nutrition, increased muscle (P = 0.02) and liver (P < 0.001) Ks, IGF-I (P < 0.001) and ALS levels (P < 0.001), whereas both parenteral and enteral nutrition reduced IGFBP-1 levels (P < 0.001). Neither enteral nor parenteral nutrition reduced protei...Continue Reading

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