Immunoreactivity of corticotropin-releasing hormone, adrenocorticotropic hormone and α-melanocyte-stimulating hormone in alopecia areata

Hei Sung Kim, Dae Ho Cho, Hee Jung Kim, Jun Young Lee, Baik Kee Cho, Hyun Jeong Park

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Psychological factors are believed to play a role in the pathogenesis of alopecia areata (AA), a frequently encountered hair disorder. In our study, statistically significant elevation of psychological stress was felt by AA patients prior hair loss compared with control, which was strongly believed contributory to hair loss (t-test, P < 0.01). The corticotropin-releasing hormone (CRH) and proopiomelanocortin (POMC) mRNA have been identified in the basal layer of the epidermis and pilosebaceous units of the normal scalp. And with the recent discovery of melanocytes and dermal fibroblasts capable of corticosterone production, the presence of a local stress response system resembling the hypothalamic-pituitary-adrenal (HPA) axis has been suggested. The local stress response system is involved in regulation of the normal hair cycle, but its precise role in AA is unknown. The influence of a local HPA axis or rather, CRH-POMC axis in AA was investigated by analysing immunohistochemically the expression levels of CRH and POMC peptides, including the adrenocorticotropic hormone (ACTH) and alpha-melanocyte-stimulating hormone (alpha-MSH), in a number of AA lesions and normal scalp (as control). The epidermis and pilosebaceous units of normal scalp stained weakly with CRH, ACTH and alpha-MSH, whereas those from the affected sites of the AA group showed intense expression of the peptides (chi-square test, P < 0.01). The meaning of this enhanced expression and their role in the pathogenesis of AA should be further evaluated in future.

Original languageEnglish
Pages (from-to)515-522
Number of pages8
JournalExperimental Dermatology
Volume15
Issue number7
DOIs
Publication statusPublished - 2006 Jul
Externally publishedYes

Keywords

  • Adrenocorticotropic hormone
  • Alopecia areata
  • Corticotropin-releasing Hormone
  • Stress
  • α-melanocyte-stimulating hormone

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Dermatology

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