Human Molecular Genetics Advance Access published online on August 22, 2006
Human Molecular Genetics, doi:10.1093/hmg/ddl234
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1 Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
* To whom correspondence should be addressed. The Neuropeptide S (NPS) - NPS Receptor 1 (NPSR1) pathway has recently been implicated in the pathogenesis of asthma. The purpose of this study was to identify downstream gene targets regulated by NPSR1 upon NPS stimulation. A total of 104 genes were found significantly up-regulated and 42 down-regulated by microarray analysis 6 h after NPS administration. By Gene Ontology enrichment analysis, the categories "cell proliferation", "morphogenesis" and "immune response" were among the most altered. A TMM microarray database comparison suggested a common co-regulated pathway, which includes JUN/FOS oncogene homologs; early growth response genes, nuclear receptor subfamily 4 members and dual specificity phosphatases. The expression of four up-regulated genes, matrix metallopeptidase 10 (MMP10), INHBA (activin A), interleukin 8 (IL8) and EPH receptor A2 (EPHA2), exhibited a significant NPS dose-response relationship as confirmed by quantitative reverse-transcriptase PCR and for MMP10 by immunoassay. Immunohistochemical analyses revealed that MMP10 and TIMP metallopeptidase inhibitor 3 (TIMP3) were both strongly expressed in bronchial epithelium, and macrophages and eosinophils expressed MMP10 in asthmatic sputum samples. Because remodelling of airway epithelium is a feature of chronic asthma, the up-regulation of MMP10 and TIMP3 by NPS-NPSR1 signaling may be of relevance in the pathogenesis of asthma.
Received July 5, 2006
Revised August 11, 2006
Accepted August 11, 2006
Article
Downstream target genes of the Neuropeptide S--NPSR1 pathway
Johanna Vendelin 1, Sara Bruce 2, Päivi Holopainen 3, Ville Pulkkinen 1, Paula Rytilä 4, Asta Pirskanen 5, Marko Rehn 5, Tarja Laitinen 5, Lauri A. Laitinen 6, Tari Haahtela 4, Ulpu Saarialho-Kere 7, Annika Laitinen 8, and Juha Kere 9 *
2 Department of Biosciences and Nutrition, Karolinska Institutet, and Clinical Research Centre, Karolinska University Hospital, Huddinge, Sweden
3 Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland; SIAF, Davos, Switzerland
4 Department of Allergy, Helsinki University Central Hospital, Helsinki, Finland
5 GeneOS Ltd., Helsinki, Finland
6 Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland
7 Department of Dermatology, University of Helsinki, Helsinki, Finland; Department of Dermatology, Karolinska Institutet at Stockholm Söder Hospital, Stockholm, Sweden
8 Department of Anatomy, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
9 Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland; Department of Biosciences and Nutrition, Karolinska Institutet, and Clinical Research Centre, Karolinska University Hospital, Huddinge, Sweden
Juha Kere, E-mail: juha.kere{at}biosci.ki.se
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