PMID: 8593714Sep 1, 1995Paper

Neuropeptides and general neuronal marker in psoriasis--an immunohistochemical study

Clinical and Experimental Dermatology
M S Al'AbadieD J Gawkrodger

Abstract

Nerve fibres immunoreactive to antibodies to vasoactive intestinal polypeptide (VIP) and substance P (SP) were increased in lesional psoriatic skin when assessed semiquantitatively. Biopsies from psoriatic plaques on the arm were studied in 13 patients and compared with biopsies from non-lesional areas (in three of the same psoriatic subjects) and from normal skin in seven non-psoriatic controls. Immunohistochemical methods were used on cryocut skin sections to demonstrate the neuropeptides SP, VIP, calcitonin gene-related peptide and neuropeptide Y, and the general neuronal marker protein gene product (PGP) 9.5. The immunofluorescence was examined by semiquantitative and, for PGP 9.5, by quantitative methods. VIP reactive nerve fibres were increased at areas of eccrine sweat glands throughout the dermis, at the dermo-epidermal junction, and in the epidermis, in psoriasis lesional skin. SP reactive nerve fibres were increased at the dermo-epidermal junction, where the nerves ran parallel with and perpendicularly through the junction. PGP 9.5 reactive nerve fibres showed an increase at the dermo-epidermal junction, in the papillary dermis, and at the eccrine sweat glands in lesional psoriatic skin but not in non-lesional, or in ...Continue Reading

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