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. 2007 Feb 1;117(2):289–296. doi: 10.1172/JCI30555

Figure 1. The cytokine theory of disease.

Figure 1

Health requires that cytokine production is balanced: low levels are required to maintain homeostasis. Overproduction of some cytokines causes diseases that span the range of severity from mild to lethal. Some diseases can develop as a result of several different cytokines, as occurs, for example, in arthritis, which can be mediated by TNF, IL-1, or HMGB1. Other diseases may be specifically caused by individual cytokines, as occurs, for instance, in acute septic shock, with lethal hemorrhagic tissue injury mediated by an overproduction of TNF.