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[The Th1/Th2 paradigm. The role of the Th1 and Th2 lymphocyte subpopulations in the regulation of immune processes].

A short report on the interaction of Th1 and Th2 lymphocyte subpopulations in the regulation of immune processes is reviewed. Th1 and Th2 subsets have been characterized on the basis of cytokines they secrete and the immune functions they mediate and also on the basis of cytokine and chemokine receptor expression. The clinical and diagnostic influence of immune processes in pathological stages is also mentioned.