Significance of TNF in hemorrhage-related hemodynamic alterations, organ injury, and mortality in rats

The American Journal of Physiology
Soheyl BahramiG Schlag

Abstract

To evaluate the role of tumor necrosis factor-alpha (TNF-alpha) in hemodynamic alterations, multiple organ damage, and mortality caused by hemorrhagic shock, we employed a monoclonal antibody to TNF-alpha (TNF-alpha MAb) in anesthetized rats subjected to prolonged hemorrhagic shock (mean arterial pressure of 30-35 mmHg for 180 min) followed by resuscitation over 50 min. Treatment of rats with 20.0 mg/kg TNF-alpha MAb 15 min after the end of resuscitation significantly decreased the total peripheral resistance index (P = 0.031) and provided remarkable protection from multiple organ damage compared with controls. The 48-h survival rate was significantly higher in the treatment group (73.3%) than in the control group (26.7%; P = 0.029). The results suggest that TNF-alpha induced by hemorrhagic shock in rats is an important mediator of pathophysiological alterations associated with cardiovascular abnormalities, multiple organ injury, and even lethality. Postresuscitation treatment with TNF-alpha MAb, even after an initial TNF-alpha formation had occurred, significantly attenuated the cardiovascular consequences and improved the survival rate. Thus monoclonal antibodies to TNF-alpha might provide new prospects in the treatment of he...Continue Reading

Citations

Apr 26, 2000·American Journal of Physiology. Endocrinology and Metabolism·M Yamashita, M Yamashita
Oct 30, 2004·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Xianzhong MengAlden H Harken
Jan 17, 2004·American Journal of Physiology. Heart and Circulatory Physiology·Luciana N TorresRoland N Pittman
May 1, 2004·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Tomoharu ShimizuIrshad H Chaudry
Apr 29, 2006·American Journal of Respiratory and Critical Care Medicine·Ettore CrimiArthur S Slutsky

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