TSLP and Pruritus: By investigating TSLP in the BP mouse model and patients, Zhang et al. found high levels of TSLP in sera, blister fluids, and BP lesions of patients with BP [19], and severe pruritus of BP was related to TSLP, whereas in another study, TSLP levels did not correlate with the severity of pruritus in BP, although the expression of TSLP was enhanced in BP lesions compared to HCs [21].