Document Detail

Type 1 interferon signature in the scalp lesions of alopecia areata.
MedLine Citation:
PMID:  20346028     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Autoimmune attack of the bulbar region of anagen phase hair follicles by CD8+ T cells and Th1 cytokines has been proposed to result in hair loss in alopecia areata (AA). The initiating stimuli are unknown. As interferon-alpha therapy may trigger AA, we propose that type 1 interferons are involved in the induction of disease.
OBJECTIVES: To compare lesional scalp from patients with AA with scalp lesions of cutaneous diseases associated with local type 1 interferon-related protein expression.
METHODS: Lesional scalp of patients with AA, discoid lupus erythematosus, lichen planopilaris and androgenetic alopecia was examined by immunohistochemistry for expression of the type 1 interferon-inducible myxovirus protein A (MxA), the chemokine receptor CXCR3, and the cytotoxic proteins granzyme B (GrB) and T-cell intracytoplasmic antigen 1 (TiA-1).
RESULTS: MxA was expressed in the intradermal and subcutaneous compartments of the hair follicle including sebaceous glands in inflammatory AA similar to lesions of cicatricial alopecia (discoid lupus erythematosus, lichen planopilaris) but not in the epidermal compartment of AA, and not at all in noninflammatory AA or androgenetic alopecia. The location of CXCR3-expressing cells correlated with MxA expression. The inflammatory cells around the hair follicle in AA included a lower number of GrB+ and TiA-1+ cells compared with cicatricial alopecia and demonstrated predominant TiA-1+ expression.
CONCLUSIONS: We demonstrate the expression of type 1 interferon-related proteins in the inflammatory lesions of AA. The distribution pattern of the interferon signature and cytotoxicity-associated proteins in AA differs from cicatricial alopecia.
M Ghoreishi; M Martinka; J P Dutz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-03-19
Journal Detail:
Title:  The British journal of dermatology     Volume:  163     ISSN:  1365-2133     ISO Abbreviation:  Br. J. Dermatol.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-21     Completed Date:  2010-12-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0004041     Medline TA:  Br J Dermatol     Country:  England    
Other Details:
Languages:  eng     Pagination:  57-62     Citation Subset:  IM    
Department of Dermatology & Skin Science and Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada.
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MeSH Terms
Alopecia Areata / immunology*,  pathology
Hair Follicle / immunology
Interferon Type I / immunology*
Lichen Planus / immunology*,  pathology
Lupus Erythematosus, Discoid / immunology*,  pathology
Scalp / immunology*
T-Lymphocytes / immunology
Reg. No./Substance:
0/Interferon Type I

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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