DCLK1 and asthma: As IL-8/CXCL8 is a potent chemoattractant of neutrophil and airway neutrophilia is correlated with asthma severity, DCLK1 involvement in the thrombin-stimulated IL-8/CXCL8 expression pathway indicates that DCLK1 might serve as a new biological marker of severe asthma.