In line with previous reports, our study showed that neither untreated nor IFNγ-pretreated KCs expressed CD80 or CD86 (Fig. 3b).26 However, we found that KCs expressed high levels of CD40 and CD58 on the cell surface, regardless of whether they were pretreated with IFNγ (Fig. 3b). Here, CD58 is linked to dry eye syndrome.