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    Modulation of the human hair follicle pigmentary unit by corticotrophin-releasing hormone and urocortin peptides

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    Publication date
    2006
    Author
    Kauser, Sobia
    Slominski, A.T.
    Wei, E.T.
    Tobin, Desmond J.
    Keyword
    Hair follicle melanocytes
    Melanogenesis,
    Corticotropin-releasing hormone
    CRH receptors
    Hair growth
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Human skin is a local source of corticotropin-releasing hormone (CRH) and expresses CRH and CRH receptors (CRH-R) at mRNA and protein levels. Epidermal melanocytes respond to CRH by induction of cAMP with up-regulation of pro-opiomelanocortin gene expression and subsequent production of adrenocorticotropin hormone. However, the role of CRH/CRH-R in melanocyte biology is complicated by the significant heterogeneity of cutaneous melanocyte subpopulations, from continuously active and UV-responsive melanocytes in epidermis to UV nonresponsive, hair growth cycle-coupled melanogenesis in hair follicles. In the present study we report that normal human scalp hair follicle melanocytes express CRH at the mRNA level. Furthermore, CRH, urocortin and CRH-R 1 and 2 were differentially expressed in follicular melanocytes, fibroblasts, and keratinocytes depending on anatomic location and differentiation status in situ and in vitro. Stimulation of follicular melanocytes with CRH and CRH peptides, modified for selectivity for CRH-R1 and/or CRH-R2, variably induced cell melanogenesis, dendricity, and proliferation. CRH-peptides also stimulated the expression and activity of Tyrosinase, and expression of Tyrosinase-related protein-1 and-2. However, a modified urocortin peptide highly selective for CRH-R2 down-regulated melanocyte differentiation phenotype. This study indicates that CRH peptides can differentially influence hair follicle melanocyte behavior not only via CRH-R1 signaling but also by complex cross-talk between CRH-R1 and CRH-R2.¿Kauser, S., Slominski, A., Wei, E. T., Tobin, D. J. Modulation of the human hair follicle pigmentary unit by corticotropin-releasing hormone and urocortin peptides.
    URI
    http://hdl.handle.net/10454/3262
    Version
    No full-text available in the repository
    Citation
    Kauser, S., Slominski, A., Wei, E.T. and Tobin, D.J. (2006). Modulation of the human hair follicle pigmentary unit by corticotrophin-releasing hormone and urocortin peptides. Faseb Journal. Vol. 20, No. 7, pp. 882-895.
    Link to publisher’s version
    http://dx.doi.org/10.1096/fj.05-5257com
    Type
    Article
    Collections
    Life Sciences Publications

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