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  • Title: The effect of major thermal injury and carbohydrate-free intake on serum triglycerides, insulin, and 3-methylhistidine excretion.
    Author: Grecos GP, Abbott WC, Schiller WR, Long CL, Birkhahn RH, Blakemore WS.
    Journal: Ann Surg; 1984 Nov; 200(5):632-7. PubMed ID: 6385884.
    Abstract:
    The severely burned patient responds differently to starvation ketosis in the early stage of injury as compared to the normal individual. A similar response has been observed in the patient after skeletal trauma and sepsis. In order to determine the extent of muscle protein contribution and the mechanism(s) involved, 11 burn patients with 35% to 80% BSA burn were resuscitated using carbohydrate-free solutions for 3 days followed by unrestricted intake. Blood was drawn daily and 24-hour urinary nitrogens were determined. Controls consisted of 10 preoperative elective surgical patients and two normal volunteers. The burned patients lost a mean +/- SEM of 17.1 +/- 1.72 g nitrogen per day on the third day. The mean +/- SEM ketone body response on the third day for burned patients was 385 +/- 77 mumol/l compared to 727 +/- 81 mumol/l for control patients. The mean +/- SEM 3-methylhistidine loss for burned patients on the third day was 9.83 +/- 0.82 mumol/kg compared to 3.6 mol/kg for control patients. Insulin levels on the third day of fast were three times the normal group. This insulin increase may be the modulating factor that suppresses excessive fat mobilization. This metabolic response causes a lower plasma ketone level, which may then necessitate the need for continued protein catabolism for glucose production for certain tissues. The protein contribution to the hypercatabolic response as assessed by increased urinary nitrogen losses is in part supported by an increased muscle protein breakdown as indicated by increased 3-methylhistidine excretion.
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