RT Journal
A1 Schirmer WJ, Schirmer JM, Fry DE
T1 REcombinant human tumor necrosis factor produces hemodynamic changes characteristic of sepsis and endotoxemia
JF Archives of Surgery
JO Archives of Surgery
YR 1989
FD April 1
VO 124
IS 4
SP 445
OP 448
DO 10.1001/archsurg.1989.01410040055012
UL http://dx.doi.org/10.1001/archsurg.1989.01410040055012
AB • Tumor necrosis factor (TNF) is a macrophage-derived peptide mediator released during endotoxemia and sepsis. We examined the systemic and visceral hemodynamic response to low doses of human recombinant TNF in rats. Each animal received a 30-minute intravenous infusion of either saline solution (n=8) or TNF (n=8) in a dose of 0.25 mg/kg or 1.0 mg/kg. Thermodilution cardiac output, blood pressure, pulse, vascular resistance, effective hepatic blood flow (galactose clearance), and effective renal plasma flow (p-aminohippurate clearance) were determined at time=2 hours. The 0.25-mg/kg dose had no apparent effect on systemic hemodynamics. The 1.0-mg/kg dose produced a hyperdynamic systemic circulatory response with an elevated cardiac output, tachycardia, and a diminished systemic vascular resistance. Effective hepatic blood flow was exquisitely sensitive to even the lowest dose of TNF, with a 29% reduction despite the normal cardiac output. Renal flow was unaffected by either dose. Tumor necrosis factor–induced systemic and visceral hemodynamic changes are remarkably similar to those seen in gram-negative sepsis, suggesting that TNF may occupy a proximal position in the pathogenesis of overwhelming infection.(Arch Surg 1989;124:445-448)