#cytokine  any of various proteins secreted by cells of the immune system that serve to regulate the immune system
  supertype:  protein  any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of long chains of polypeptides
  subtype:  tumor_necrosis_factor__tumour_necrosis_factor__TNF  a proinflammatory cytokine that is produced by white blood cells (monocytes and macrophages); has an antineoplastic effect but causes inflammation (as in rheumatoid arthritis)
  subtype:  lymphokine  a cytokine secreted by helper T cells in response to stimulation by antigens and that play a role in cell-mediated immunity
     subtype:  interleukin  any of several lymphokines that promote macrophages and killer T cells and B cells and other components of the immune system

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