Document Detail


Interleukin-9 and Interleukin-13 augment UTP-induced Cl ion transport via hCLCA1 expression in a human bronchial epithelial cell line.
MedLine Citation:
PMID:  17250694     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: IL-9 and IL-13 induce airway goblet cell metaplasia, which is associated with expression of a Ca(2+)-activated Cl channel, hCLCA1. OBJECTIVE: As UTP stimulates both mucin secretion and Cl ion transport via a Ca(2+)-dependent pathway, the purpose of this study is to determine whether IL-9 and IL-13 affect UTP-induced Cl ion transport in human bronchial epithelial cell line 16HBE cells, and if they do, to elucidate whether such an effect is associated with hCLCA1 expression. METHODS: The increases in short-circuit current (I(sc)) in response to UTP were measured in the presence of amiloride by the Ussing chamber method. The morphology of epithelial cells was assessed by light microscopic findings, and hCLCA1 expression was investigated by immunocytochemistry and immunoblotting. RESULTS: UTP-induced increases in I(sc) in the cells treated with IL-9 or IL-13 for 48 h were greater than those in non-treated cells, and the potency of IL-13 was greater than that of IL-9. Pre-treatment with Ca(2+)-activated Cl channel inhibitors diisothocyanatostilbene-2, 2-disulphonic acid and niflumic acid completely inhibited the augmenting effects of IL-9 and IL-13 on I(sc). The epithelial layer of the cells treated with IL-9 or IL-13 was thicker than that of non-treated cells. The expression of hCLCA1 protein was induced by IL-13 in a concentration-dependent manner. These effects of IL-13 were more potent than those of IL-9. CONCLUSION: IL-9 and IL-13 augmented UTP-induced Cl ion transport, probably via proliferation of the cells with hCLCA1 expression, and IL-13 was more potent than IL-9 in producing such an effect in 16HBE cells.
Authors:
Y Endo; K Isono; M Kondo; J Tamaoki; A Nagai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology     Volume:  37     ISSN:  0954-7894     ISO Abbreviation:  Clin. Exp. Allergy     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-01-25     Completed Date:  2007-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8906443     Medline TA:  Clin Exp Allergy     Country:  England    
Other Details:
Languages:  eng     Pagination:  219-24     Citation Subset:  IM    
Affiliation:
First Department of Medicine, Tokyo Woman's Medical University School of Medicine, Tokyo, Japan.
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MeSH Terms
Descriptor/Qualifier:
Asthma / genetics,  metabolism*
Epithelial Cells / metabolism*
Gene Expression
Humans
Interleukin-13 / genetics,  metabolism*
Interleukin-9 / genetics,  metabolism*
Ion Transport / genetics*
Respiratory Mucosa / metabolism*
Chemical
Reg. No./Substance:
0/Interleukin-13; 0/Interleukin-9

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