Tumor necrosis factor alpha (TNF-alpha) and interleukin 12 (IL-12) are two
major macrophage-derived mediators of inflammatory responses in mammals. In
creasing evidence suggests that TNF-alpha is a double-edged sword with both
proinflammatory and anti-inflammatory propensities. This article discusses
the inter-regulation of TNF-alpha and IL-12 and the impact on the function
of macrophages in innate and adaptive immunity. (C) 2001 Editions scientif
iques et medicales Elsevier SAS.