Elevated NGF, NT-3, TrkB, and TrkC mRNA expression on SMCs from patients with mastocytosis. Relative mRNA expression of NGF-β (A), NT-3 (B), NT-4/5 (C), TrkA (D), TrkB (E), and TrkC (F) on cultured SMCs isolated from healthy skin (CTR; n = 5 for all except for NT-4/5 [n = 4]) or from patients with mastocytosis (MAST; n = 5 including CM [n = 1] and ISM [n = 4] for each group except for NT-4/5 [n = 3]) are depicted. Mean values ± SEMs are shown.