CXCR6 and eosinophilic esophagitis: The quantitative real-time PCR analysis indicated that mRNA expression for several iNKT cell-related genes such as cell surface molecule, TCR and their subcomponents, CD1d, Vα24, Vβ11, CXCR6, and chemokine CXCL16 were significantly induced in the esophageal biopsies of EoE patients compared with comparison control normal subjects (Figures 3a–f).