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Bronchial biopsies were collected before and after 12\u201314\u2005weeks of treatment, then the patients destabilised by substantial, supervised reduction of their regular therapy. Primary outcome measures were changes in bronchial mucosal IgE<jats:sup>+<\/jats:sup>cells at 12\u201314\u2005weeks, prior to regular therapy reduction, and changes in lung function (forced expiratory volume in 1\u2005s) after destabilisation at 20\u2005weeks. Quality of life was also monitored.<\/jats:p><jats:p>Omalizumab but not placebo therapy significantly reduced median total bronchial mucosal IgE<jats:sup>+<\/jats:sup>cells (p&lt;0.01) but did not significantly alter median total mast cells, plasma cells, B lymphocytes, eosinophils and plasmablasts, although the latter were difficult to enumerate, being distributed as disperse clusters. By 20\u2005weeks, lung function declined in the placebo-treated patients but improved in the omalizumab treated patients, with significant differences in absolute (p=0.04) and % predicted forced expiratory volume in 1\u2005s (p=0.015).<\/jats:p><jats:p>Omalizumab therapy of non-atopic asthmatics reduces bronchial mucosal IgE<jats:sup>+<\/jats:sup>mast cells and improves lung function despite withdrawal of conventional therapy.<\/jats:p>","DOI":"10.1183\/13993003.01501-2015","type":"journal-article","created":{"date-parts":[[2016,10,21]],"date-time":"2016-10-21T01:58:32Z","timestamp":1477015112000},"page":"1593-1601","update-policy":"https:\/\/doi.org\/10.1183\/ers-crossmark-policy","source":"Crossref","is-referenced-by-count":56,"title":["Omalizumab reduces bronchial mucosal IgE and improves lung function in non-atopic asthma"],"prefix":"10.1183","volume":"48","author":[{"given":"Prathap","family":"Pillai","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yih-Chih","family":"Chan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shih-Ying","family":"Wu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Line","family":"Ohm-Laursen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clare","family":"Thomas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen R.","family":"Durham","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Menzies-Gow","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raj K.","family":"Rajakulasingam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sun","family":"Ying","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hannah J.","family":"Gould","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chris J.","family":"Corrigan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"81","published-online":{"date-parts":[[2016,10,20]]},"reference":[{"key":"2024102100144384000_48.6.1593.1","unstructured":"GINA Asthma Burden Summary. 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