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→TH17 Cells
Both T<sub>H</sub>1 and T<sub>H</sub>2 cells produce IL-3 and granulocyte-macrophage colony stimulating factor ([[Leukopoiesis|GM-CSF]]). These act to activate and induce proliferation of [[Neutrophils|neutrophils]] and [[Macrophages|macrophages]]. [[Neutrophils|Neutrophils]] are the major phagocytic cells in the blood and the principal cells in acute inflammatory lesions whose function is chiefly the body's defence against extracellular bacteria. One of the major biological functions therefore of the activation of either T<sub>H</sub> subset is '''cytokine-controlled reactive [[Haematopoiesis - Overview|haematopoiesis]]'''.
Both T<sub>H</sub>1 and T<sub>H</sub>2 cells produce IL-3 and granulocyte-macrophage colony stimulating factor ([[Leukopoiesis|GM-CSF]]). These act to activate and induce proliferation of [[Neutrophils|neutrophils]] and [[Macrophages|macrophages]]. [[Neutrophils|Neutrophils]] are the major phagocytic cells in the blood and the principal cells in acute inflammatory lesions whose function is chiefly the body's defence against extracellular bacteria. One of the major biological functions therefore of the activation of either T<sub>H</sub> subset is '''cytokine-controlled reactive [[Haematopoiesis - Overview|haematopoiesis]]'''.
==TH<sub>17</sub> Cells==
==T<sub>H</sub>17 Cells==
''Still under investigation''
''Still under investigation''
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The TH<sub>2</sub> cells which form when TH<sub>0</sub> cells are challenged with IL-6 and TGF-β produce a number of cytokines that enhance the innate immune response. The [[Cytokines|cytokines]] produced enhance the extravasation and chemotaxis of [[Neutrophils|neutrophils]] to the site of infection. These cytokines include:
The T<sub>H</sub>17 cells which form when T<sub>H</sub>0 cells are challenged with IL-6 and TGF-β produce a number of cytokines that enhance the innate immune response. The [[Cytokines|cytokines]] produced enhance the extravasation and chemotaxis of [[Neutrophils|neutrophils]] to the site of infection, in the aim of combating extracellular bacteria. These cytokines include:
*IL-17
*IL-17
*IL-17F
*IL-17F