Expression and role of E-cadherin and CD103beta7 (alphaEbeta7 integrin) on cultured mucosal-type mast cells.
Mucosal-type mast cells (MMC) in the respiratory and/or gut epithelium play pivotal roles in the development of allergic inflammation and nematode clearance. To determine the role of E-cadherin and alphaEbeta7 integrin in MMC localization to the epithelium, we analyzed the epithelial binding of two types of mouse bone marrow-derived mast cells: S3-BMMC, which developed in medium containing stem cell factor (SCF) plus IL-3, and S39T-BMMC, which developed with SCF, IL-3, IL-9 and TGF-beta1. The latter cells were more similar to mature MMC than the former in terms of mouse mast cell protease (mMCP)-1 expression. FACS analyses revealed that S3-BMMC expressed E-cadherin and beta7 integrin but not alphaE integrin, whereas S39T-BMMC expressed alphaEbeta7 integrin as well as E-cadherin. Mn2+ promoted adhesion of S39T-BMMC to the monolayer of E-cadherin+F9 cells. The adhesion was suppressed significantly by the combined addition of blocking antibodies against integrin alphaE and E-cadherin, whereas either blocking antibody alone failed to do so. S3-BMMC adhesion was suppressed by E-cadherin blocking antibody but not by alphaE blocking antibody. These results suggested that E-cadherin and alphaEbeta7 integrin, which are expressed on MMC-analog S39T-BMMC, play an important role in mast cell-epithelial cell interaction through homophilic as well as heterophilic binding to the epithelial E-cadherin molecule.
Tegoshi
Tatsuya
T
Department of Medical Zoology, Kyoto Prefectural University of Medicine Graduate School, Kyoto, Japan. ttegoshi@koto.kpu-m.ac.jp
Nishida
Minoru
M
Arizono
Naoki
N
D000818:Animals; D015703:Antigens, CD / Q000096:biosynthesis*; D015820:Cadherins / Q000096:biosynthesis*; D002448:Cell Adhesion / Q000276:immunology; D002478:Cells, Cultured; D017931:DNA Primers; D004847:Epithelial Cells / Q000378:metabolism; D005260:Female; D005434:Flow Cytometry; D039001:Integrin alpha Chains / Q000096:biosynthesis*; D008407:Mast Cells / Q000276:immunology / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D009092:Mucous Membrane / Q000276:immunology / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
D015703:Antigens, CD; D015820:Cadherins; D017931:DNA Primers; D039001:Integrin alpha Chains; C091367:alpha E integrins