Histamine enhances the production of nerve growth factor in human keratinocytes - PubMed (original) (raw)

Histamine enhances the production of nerve growth factor in human keratinocytes

Naoko Kanda et al. J Invest Dermatol. 2003 Sep.

Free article

Abstract

Nerve growth factor induces innervation and epidermal hyperplasia in inflammatory skin diseases like psoriasis. Nerve growth factor production by keratinocytes is increased in the inflammatory lesions. Nerve growth factor induces histamine release from mast cells. We examined the in vitro effects of histamine on nerve growth factor production in human keratinocytes. Histamine enhanced nerve growth factor secretion, mRNA expression, and promoter activity in keratinocytes. Two TPA-response elements on the nerve growth factor promoter were responsible for the activation by histamine. Histamine enhanced transcriptional activity and DNA binding of activator protein 1 at the two TPA-response elements. It shifted the TPA-response-element-binding activator protein 1 composition from c-Jun homodimers to c-Fos/c-Jun heterodimers. Histamine transiently induced c-Fos mRNA expression, which was not detectable in unstimulated keratinocytes, whereas c-Jun mRNA expression was constitutive and was not altered by histamine. Histamine-induced enhancement of nerve growth factor secretion, promoter activity, activator protein 1 transcriptional activity, and c-Fos expression was suppressed by H1 antagonist pyrilamine, protein kinase C inhibitor calphostin C, and PD98059, an inhibitor of mitogen-activated protein kinase kinase 1. Histamine induced the translocation of protein kinase C activity from cytosol to membrane, which was suppressed by phospholipase C inhibitor U73122. It stimulated the phosphorylation of extracellular signal-regulated kinase, which was blocked by pyrilamine, calphostin C, and PD98059. These results suggest that histamine may enhance nerve growth factor production by inducing c-Fos expression in keratinocytes. These effects may be mediated by the H1-receptor-induced signaling cascade of phospholipase C-protein kinase C-mitogen-activated protein kinase kinase 1-extracellular signal-regulated kinase.

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Histamine enhances the production of nerve growth factor in human keratinocytes - PubMed (original) (raw)