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4 bytes removed ,  16:48, 27 September 2010
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Th1 cells interact with CD8<sup>+</sup>, NK and dendritic cells and Th2 cells interact with B cells. Th1 cells are involved with the control of intracellular pathogens and Th2 cells extracellular pathogens. Il-2 produced by Th1 cells stimulates further proliferation of CD4<sup>+</sup> cells.</p>
 
Th1 cells interact with CD8<sup>+</sup>, NK and dendritic cells and Th2 cells interact with B cells. Th1 cells are involved with the control of intracellular pathogens and Th2 cells extracellular pathogens. Il-2 produced by Th1 cells stimulates further proliferation of CD4<sup>+</sup> cells.</p>
 
<p>Th0 populations are CD4<sup>+</sup> cells that have yet to differentiate into Th1 or Th2 cells and they secrete Il-2, IL-4, Il-5, IFN-γ. In the presence of Il-4 they develop into Th2 cells while in the presence of Il-2 they develop into Th1 cells. In the abscence of Il-2 Th1 cells will change into Th2 cells.</p>
 
<p>Th0 populations are CD4<sup>+</sup> cells that have yet to differentiate into Th1 or Th2 cells and they secrete Il-2, IL-4, Il-5, IFN-γ. In the presence of Il-4 they develop into Th2 cells while in the presence of Il-2 they develop into Th1 cells. In the abscence of Il-2 Th1 cells will change into Th2 cells.</p>
<p>Th1 cells have two populations; one that secretes IFN-γ and is short lived, and the other that doesn’t secrete IFN-γ and is long lived. The IFN-γ<sup>-</sup> cells are termed '''memory T cells'''</p>
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<p>Th1 cells have two populations; one that secretes IFN-γ and is short lived, and the other that doesn’t secrete IFN-γ and is long lived. The cells lacking IFN-γ are termed '''memory T cells'''</p>
    
==Cytotoxic CD8<sup>+</sup>==
 
==Cytotoxic CD8<sup>+</sup>==
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