“…This inflammatory cascade can become self-sustaining when cytokines produced early in the infectious process (e.g., tumor necrosis factor alpha [TNF-␣] and interleukin-1 [IL-1]) induce further production of these and other proinflammatory cytokines (20,44) Agents directed at common triggers for the sepsis syndrome (e.g., lipopolysaccharide [LPS]) or cytokines (e.g., TNF-␣ and IL-1) associated with systemic inflammation would, at least conceptually, be attractive therapeutic targets (1,14). Regrettably, most of these potentially novel therapeutic approaches have failed to significantly affect the overall mortality of sepsis patients despite their success in many experimental animal models of sepsis (1,2,9,16,29,38). One potential explanation for these repeated clinical failures is that sepsis, in fact, represents a heterogeneous collection of clinically related diseases whose pathogenesis may vary substantially, depending upon the microbe responsible for inducing the systemic proinflammatory cascade (e.g., gram-negative versus gram-positive organisms) (6,34,43).…”