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J. Exp. Med.,
Volume 188, Number 7, October 5, 1998 1343-1352
, or the p55TNF-R
By
From the Department of Molecular Genetics, Hellenic Pasteur Institute, 115 21 Athens, Hellas
Despite overwhelming evidence that enhanced production of the p75 tumor necrosis factor receptor (p75TNF-R) accompanies development of specific human inflammatory pathologies
such as multi-organ failure during sepsis, inflammatory liver disease, pancreatitis, respiratory
distress syndrome, or AIDS, the function of this receptor remains poorly defined in vivo. We
show here that at levels relevant to human disease, production of the human p75TNF-R in
transgenic mice results in a severe inflammatory syndrome involving mainly the pancreas, liver,
kidney, and lung, and characterized by constitutively increased NF-
B activity in the peripheral blood mononuclear cell compartment. This process is shown to evolve independently of the presence of TNF, lymphotoxin
, or the p55TNF-R, although coexpression of a human
TNF transgene accelerated pathology. These results establish an independent role for enhanced
p75TNF-R production in the pathogenesis of inflammatory disease and implicate the direct involvement of this receptor in a wide range of human inflammatory pathologies.
B activation
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