Calcitonin gene-related peptide (CGRP) may award relative protection from interferon-γ-induced collapse of human hair follicle immune privilege.

Abstract:

:Interferon-γ (IFNγ)-induced collapse of hair follicle (HF) immune privilege (IP) is a key element in the pathogenesis of alopecia areata. In this pilot study, we investigated whether the immunosuppressive neuropeptide, calcitonin gene-related peptide (CGRP), can protect from and/or restore IFNγ-induced HF-IP collapse. After showing that human scalp HFs express CGRP receptor-like receptor (CRLR) immunoreactivity, anagen HFs were cultured in the presence of IFNγ, with CGRP added before or after. Adding CGRP after IFNγ administration ('restoration assay') failed to downregulate IFNγ-induced ectopic MHC class I expression, while MHC class II expression was reduced. However, administering CGRP before IFNγ application ('protection assay') significantly reduced the IFNγ-induced overexpression and ectopic expression of MHC class I and II and reduced the increased degranulation of perifollicular mast cells induced by IFNγ. This suggests that CGRP may not restore HF-IP once it has collapsed, but may protect it from collapsing. Therefore, CRLR stimulation might help to retard AA progression.

journal_name

Exp Dermatol

journal_title

Experimental dermatology

authors

Kinori M,Bertolini M,Funk W,Samuelov L,Meyer KC,Emelianov VU,Hasse S,Paus R

doi

10.1111/j.1600-0625.2011.01432.x

subject

Has Abstract

pub_date

2012-03-01 00:00:00

pages

223-6

issue

3

eissn

0906-6705

issn

1600-0625

journal_volume

21

pub_type

信件
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