Human salivary peptide histatin-1 stimulates epithelial and endothelial cell adhesion and barrier function

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
Irene A van DijkJan Stap

Abstract

Histatins are multifunctional histidine-rich peptides secreted by the salivary glands and exclusively present in the saliva of higher primates, where they play a fundamental role in the protection of the oral cavity. Our previously published results demonstrated that histatin-1 (Hst1) promotes cell-substrate adhesion in various cell types and hinted that it could also be involved in cell-cell adhesion, a process of fundamental importance to epithelial and endothelial barriers. Here we explore the effects of Hst1 on cellular barrier function. We show that Hst1 improved endothelial barrier integrity, decreased its permeability for large molecules, and prevented translocation of bacteria across epithelial cell layers. These effects are mediated by the adherens junction protein E-cadherin (E-cad) and by the tight junction protein zonula occludens 1, as Hst1 increases the levels of zonula occludens 1 and of active E-cad. Hst1 may also promote epithelial differentiation as Hst1 induced transcription of the epithelial cell differentiation marker apolipoprotein A-IV (a downstream E-cad target). In addition, Hst1 counteracted the effects of epithelial-mesenchymal transition inducers on the outgrowth of oral cancer cell spheroids, sugges...Continue Reading

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Citations

Dec 13, 2017·Oral Diseases·P TorresV A Torres
Jul 29, 2017·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Pedro TorresVicente A Torres
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Feb 9, 2021·Journal of Tissue Viability·Li PanQiong Gao
Jul 8, 2021·The FEBS Journal·Kyung-No SonVinay Kumar Aakalu

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