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<big><center>[[Immunology - WikiBlood|'''BACK TO IMMUNOLOGY''']]</center></big>
<big><center>[[Immunology - WikiBlood|'''BACK TO IMMUNOLOGY''']]</center></big>
==
==Introduction==
==Development of CD4+ T-Cell Subpopulations==
==Development of CD4+ T-Cell Subpopulations==
* The proliferation of T cells continues until antigen disappears.
* The proliferation of T cells continues until antigen disappears.
==TH<sub>1</sub> Cells==
===TH<sub>1</sub> Cells===
* TH<sub>1</sub> cells secrete a range of cytokines.
* TH<sub>1</sub> cells secrete a range of cytokines.
*** Can act to suppress antibody synthesis.
*** Can act to suppress antibody synthesis.
==TH<sub>2</sub> Cells==
===TH<sub>2</sub> Cells===
* The TH2 population influences B-cell activation, proliferation and immunoglobulin production.
* The TH2 population influences B-cell activation, proliferation and immunoglobulin production.
*** Promotes immunoglobulin synthesis.
*** Promotes immunoglobulin synthesis.
==Common Functions of Th<sub>1</sub> and TH<sub>2</sub> Cells==
===Common Functions of Th<sub>1</sub> and TH<sub>2</sub> Cells===
* Both TH1 and TH2 cells produce IL-3 and granulocyte-macrophage colony stimulating factor (GM-CSF).
* Both TH1 and TH2 cells produce IL-3 and granulocyte-macrophage colony stimulating factor (GM-CSF).