Figure 1. TSLP triggers robust itch behaviors in mice by activating sensory neurons.
(A) PCR analysis of TSLPR and IL7Rα in mouse (left) and human (right) dorsal root ganglia (DRG). No product was amplified from the “no RT” control. (B) Image of itch-evoked scratching following intradermal injection of TSLP (2.5 μg/20 μl) into the cheek. (C) Quantification of scratching following TSLP injection in the cheek. TSLP (black) induced robust scratching compared to vehicle (white). n≥18 per group. (D) Itch behavior in RAG+/+, RAG-/-, NOD, and NOD/SCID mice following vehicle (PBS) or TSLP cheek injection. n≥8 per group. (E) Itch behavior in cKIT+/+ and cKIT-/- mice following vehicle (PBS) or TSLP injection. n≥8 per group. (F) TSLP-evoked scratching following neuronal ablation by RTX (red) versus control (black). n≥6 per group. *P<0.05; **P<0.01; ***P<0.001. Error bars represent s.e.m.