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The present study was designed to evaluate the effect of So-Cheong-Ryong-Tang (SCRT, also called Sho-Seiryu-To or Xiao-Qing-Long-Tang) on helper T cell development by monitoring Th1/Th2-specific cytokine secretion patterns in artificially induced Th1 or Th2 polarized conditions. The results demonstrated that Th2 cells were dramatically underpopulated in the Th2-driven condition triggered by SCRT treatment, while the Th1 cells were not altered in the Th1-skewed condition. Furthermore, under Th2-skewed conditions the levels of interleukin-4 were considerably decreased with SCRT treatment. The expression of GATA-3, a transcription factor that plays a pivotal role in Th2 lineage programming, did not change with SCRT treatment, while the expression of another Th2 transcription factor, c-Maf, was dramatically suppressed. These data suggest that SCRT modulates Th2 development by suppressing c-Maf expression. This study implies that the SCRT effect on CD4(+) T cells is a key pharmacologic point of effect for treating IgE-mediated allergic asthma. These results also suggest that SCRT might be a useful agent for the correction of Th2-dominant pathologic disorders.

So-Cheong-Ryong-Tang, Tradititional Korean Medicine, Suppresses Th2 Lineage Development