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J. Exp. Med.
© The Rockefeller University Press
0022-1007/97/03/825/08 $2.00
Volume 185, Number 5, March 3, 1997 825-832

Selective Expression of an Interleukin-12 Receptor Component by Human T Helper 1 Cells

By Lars Rogge,* Luisella Barberis-Maino,* Mauro Biffi,* Nadia Passini,* David H. Presky,Dagger Ueli Gubler,Dagger and Francesco Sinigaglia*

From * Roche Milano Ricerche, I-20132 Milan, Italy; and Dagger  Department of Inflammation/ Autoimmune Diseases, Hoffmann-La Roche Inc., Nutley, New Jersey 07110

Interleukin-12 (IL-12), a heterodimeric cytokine produced by activated monocytes and dendritic cells, plays a crucial role in regulating interferon (IFN)-gamma production and in the generation of IFN-gamma -producing T helper 1 (Th1) cells. Here we show that the IL-12 receptor (IL12R) beta 2 subunit, a recently cloned binding and signal transducing component of the IL-12R, is expressed on human Th1 but not Th2 clones and is induced during differentiation of human naive cells along the Th1 but not the Th2 pathway. IL-12 and type I but not type II interferons induce expression of the IL-12R beta 2 chain during in vitro T cell differentiation after antigen receptor triggering. The selective expression and regulation of the IL-12R beta 2 subunit may help to understand the basis of Th1/Th2 differentiation and may provide therapeutic options for altering the Th1/Th2 balance in several immuno-pathological conditions such as autoimmune diseases and allergies.


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