• Acta Derm. Venereol. · Jan 2015

    Increased expression of three types of transient receptor potential channels (TRPA1, TRPV4 and TRPV3) in burn scars with post-burn pruritus.

    • Yoon Seok Yang, Soo Ick Cho, Min Gyu Choi, Young Hee Choi, In Suk Kwak, Chun Wook Park, and Hye One Kim.
    • Department of Dermatology, College of Medicine, Hallym University, Kangnam Sacred Heart Hospital, 948-1, Daerim 1-dong, Yeungdeungpo-gu, Seoul, Korea.
    • Acta Derm. Venereol. 2015 Jan 1; 95 (1): 20-4.

    AbstractPost-burn pruritus is a common distressing consequence of burn wounds. Empirical treatment often fails to have a satisfactory outcome on post-burn pruritus, as the mechanism of post-burn pruritus has not been fully elucidated. The aim of this study was to evaluate the manifestation of transient receptor potential (TRP) channels in post-burn pruritus. Fifty-one burn patients with (n=33) or without (n=18) pruritus were investigated, including skin biopsies. Not unexpectedly, the scarred body area was larger in the former group. In immunohistochemistry, TPRV3 was significantly elevated in the epidermis of burn scars with pruritus. Furthermore, real time- PCR showed that mRNA of TRPA1 and TRPV4 was increased in itching burn scars. Staining for substance P and CGRP did not differ between the 2 grouped, but the former neuropeptide was increased in burn scars. These results may help determine a specific therapeutic approach for post-burn pruritus.

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