Current Drug Target -Inflammation & Allergy

Kurt S Zaenker
Institute of Immunology and Experimental Oncology
University Witten/Herdecke
Stockumerstraße 10
Witten, 58448
Germany

Back

Epithelial Cell-Derived Antibacterial Peptides Human β-Defensins and Cathelicidin: Multifunctional Activities on Mast Cells

Author(s): Francois Niyonsaba, Michimasa Hirata, Hideoki Ogawa and Isao Nagaoka

Affiliation: Department of Biochemistry, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.

Abstract:

Antibacterial peptides function as effectors for defense in innate immunity. In mammals, they are implicated in the barrier protection of epithelia where their expression can be induced during infection and inflammation. Over a dozen of antibacterial peptides have been identified in humans. Among these, defensins and cathelicidins have been well characterized. Two types of defensins (α- and β-defensins) are recognized based on the presence of their conserved six cysteine residues, whereas cathelicidins are characterized by a homologous cathelin sequence in the pro-region and a variable antibacterial C-terminal sequence. Human β-defensins and cathelicidin hCAP18 / LL-37 are mainly expressed in epithelial tissues where mast cells are present. Here we review the structure of human β-defensins and cathelicidin, and describe their multiple activities on mast cells to induce chemotaxis, degranulation and prostaglandin D2 production, acting through receptors coupled to G-protein-phospholipase C pathway. Thus, in addition to their bactericidal activities, epithelial cell-derived antibacterial peptides may modulate the inflammatory responses by recruiting mast cells to inflammation foci and inducing the degranulation as well as prostaglandin production from this cell population.

Keywords: mast cell, defensin, cathelicidin, chemotaxis, histamine, prostaglandin, g-protein-coupled receptor

Order Reprints Order Eprints Rights & PermissionsPrintExport

Article Details

VOLUME: 2
ISSUE: 3
Page: [224 - 231]
Pages: 8
DOI: 10.2174/1568010033484115
Price: $58