Abstract:
:Alopecia areata (AA) is a dermatosis involving the sudden occurrence of bald patches on the scalp. Although the aetiology is unknown, experimental data indicate that cutaneous microcirculation plays an important role. The skin is richly innervated by neuropeptidergic sensory nerves that help regulate microvascular circulation. This study shows a reduction of cutaneous levels of substance P and calcitonin gene-related peptide (CGRP) but not of vasoactive intestinal polypeptide in scalp biopsies from patients with AA. Laser-Doppler flowmetry was used to study microcirculation of the scalp. Results indicate that patients with AA have lower basal blood flow and greater vasodilatation following intradermal CGRP injection than control subjects. A vascular hyper-reactivity to vasodilatatory substances such as neuropeptides, probably because of the lack of these substances, is hypothesized.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Rossi R,Del Bianco E,Isolani D,Baccari MC,Cappugi Pdoi
10.1097/00001756-199703240-00015subject
Has Abstractpub_date
1997-03-24 00:00:00pages
1135-8issue
5eissn
0959-4965issn
1473-558Xjournal_volume
8pub_type
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