Abstract:
:Sonic hedgehog (SHH) is abundantly expressed and critical for morphogenesis in embryonic lungs; however, SHH expression drops to a much lower level in mice from E17.5 and in humans from the 21st gestational week. We find that SHH expression is robustly upregulated in the airway epithelia of children with asthma or mouse models with allergic airway disease. Specifically, airway-specific SMO loss of function significantly suppresses allergen-induced goblet cell phenotypes, whereas an airway-specific SMO gain of function markedly enhances the goblet cell phenotypes in mouse models with allergic airway disease. Notably, intratracheal administration with SHH-neutralizing antibody or cyclopamine robustly attenuates goblet cell phenotypes in mouse models with allergic airway disease. Finally, we identify that Muc5AC gene encoding MUC5AC mucin serves as a direct target of GLI transcriptional factors in response to SHH, whereas the SAM-pointed domain-containing ETS transcription factor and Forkhead box A2, critical transcriptional factors for goblet cell phenotypes, both function as the effectors of GLIs in response to SHH stimulation. Together, the upregulation of SHH expression in allergic bronchial epithelia contributes to goblet cell metaplasia; thus, blockage of SHH signaling is a rational approach in a therapeutic intervention of epithelial remodeling in chronic airway diseases.
journal_name
Mucosal Immunoljournal_title
Mucosal immunologyauthors
Xu C,Zou C,Hussain M,Shi W,Shao Y,Jiang Z,Wu X,Lu M,Wu J,Xie Q,Ke Y,Long F,Tang L,Wu Xdoi
10.1038/s41385-018-0033-4subject
Has Abstractpub_date
2018-09-01 00:00:00pages
1306-1315issue
5eissn
1933-0219issn
1935-3456pii
10.1038/s41385-018-0033-4journal_volume
11pub_type
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