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Attenuation of the Acute-Phase Response in Thermally Injured Rats by Cholesterol-Containing Cationic Liposomes Used as a Delivery System for Gene Therapy
Marc G. Jeschke, MD;
Robert E. Barrow, PhD;
J. Regino Perez-Polo, PhD;
David N. Herndon, MD
Arch Surg. 1999;134:1098-1102.
Hypothesis Cholesterol-containing cationic liposomes alone modulate the acute-phase response and cytokine expression in thermally injured rats and are an effective delivery system for gene therapy in trauma.
Setting Laboratory.
Intervention Fifty-six adult male Sprague-Dawley rats with a full-thickness scald burn covering 60% of total body surface area were randomly divided into 2 groups to receive either intravenous injections of cholesterol-containing cationic liposomes or saline (control).
Main Outcome Measures Body weights, muscle and liver dry-wet weights, serum levels of constitutive hepatic proteins, acute-phase protein levels, and cytokine levels were determined at 1, 2, 5, and 7 days after thermal injury.
Results Rats receiving cholesterol-containing cationic liposomes had less body weight loss, increased serum transferrin levels, and decreased serum 1-acid glycoprotein levels when compared with controls (P<.05). Serum interleukin 1 and tumor necrosis factor levels were decreased in rats receiving liposomes at 1 and 2 days after burn compared with controls (P<.05).
Conclusions These results suggest that cholesterol-containing cationic liposomes alone may have a beneficial effect in modulating the hypermetabolic response after burn injury by decreasing type 1 acute-phase proteins and the expression of the proinflammatory cytokines interleukin 1 and tumor necrosis factor . Therefore, cholesterol-containing cationic liposomes appear to be suitable as a delivery system for gene therapy in trauma.
From the Departments of Surgery (Drs Jeschke, Barrow, and Herndon) and Human Biological Chemistry and Genetics (Dr Perez-Polo), Shriners Burns Hospital, Galveston, Tex.
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