Therefore, we suggested that the wild types apparently react with a stronger T-cell response to the LPS stimulus than the CD26− animals and that there is a more or less pronounced upregulation of CD26+ T cells as seen in an asthma model of adult rats (Lun et al. 2007; Schade et al. 2008; Kruschinski et al. 2005). The gene discussed is DPP4; the disease is asthma.