PMID: 9534881Apr 16, 1998Paper

Psoriatic keratinocytes express high levels of nerve growth factor

Acta Dermato-venereologica
S P RaychaudhuriE M Farber

Abstract

Many investigators have reported proliferation of terminal cutaneous nerves and upregulation of various neuropeptides (substance P, vasoactive intestinal polypeptide, calcitonin gene-related peptide) in psoriatic lesions. Nerve growth factor promotes growth of nerves and causes upregulation of neuropeptides like substance P and calcitonin gene-related peptide. In this study we investigated the expression of nerve growth factor in psoriatic lesions, non-lesional psoriatic skin, lichen planus and normal control skin. Immunoperoxidase staining was applied on cryosections prepared from snap-frozen biopsy specimens. The primary antibody used was a polyclonal anti-NGF-beta antibody. Nerve growth factor was detected only in the keratinocytes. In psoriatic tissue the number of keratinocytes per square millimeter of epidermis positive for nerve growth factor was 84.7 +/- 46.3 compared to 44.8 +/- 29.9, 18.9 +/- 11.8 and 7.5 +/- 16.9, respectively, in non-lesional psoriatic skin, normal skin and lichen planus. Increased expression of nerve growth factor substantiates larger numbers of terminal cutaneous nerves and upregulations of substance P and calcitonin gene-related peptide in psoriatic lesions. In addition, nerve growth factor is mi...Continue Reading

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