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Journal of Endotoxin Research
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Review: D-Galactosamine lethality model: scope and limitations

Richard Silverstein

Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, Kansas, USA, rsilvers{at}kumc.edu

D-Galactosamine (D-galN) is well established as sensitizing mice and other animals to the lethal effects of TNF, specifically, and by several orders of magnitude. Protection by anti-TNF neutralizing antibody is complete, as is (metabolically-based) protection by uridine. Sensitization occurs regardless of the origin of the released TNF, whether it is released from macrophages and/or T-cells. The same is true for the challenging agent which leads to the release of TNF, whether it is endotoxin, a superantigen, lipoprotein, bacterial DNA, or bacteria, either killed or proliferating. Most studies have utilized endotoxin as the challenging agent, and more than 70 agents have been reported to confer protection against LPS and/or TNF challenge in the model. The model has provided new insight regarding modes of protection, including from dexamethasone, which protects against challenge from LPS but not from challenge by TNF. The D-galN lethality model has also been used to test for synergistic behavior between different bacterial components, and to test for lethality when only small amounts of the challenging agent are available (lipid A chemistry).

Key Words: D-galactosamine • TNF • D-galN lethality model

Journal of Endotoxin Research, Vol. 10, No. 3, 147-162 (2004)
DOI: 10.1177/09680519040100030201
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