{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T14:13:08Z","timestamp":1791987188300,"version":"4.4.0"},"reference-count":41,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2016,5,1]],"date-time":"2016-05-01T00:00:00Z","timestamp":1462060800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2016,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Rationale<\/jats:title>\n                    <jats:p>Mucins are essential for airway defense against bacteria. We hypothesized that abnormal secreted airway mucin levels would be associated with bacterial colonization in patients with severe chronic obstructive pulmonary disease (COPD)<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To investigate the relationship between mucin levels and the presence of potentially pathogenic micro-organisms in the airways of stable patients with severe COPD<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Clinically stable patients with severe COPD were examined prospectively. All patients underwent a computerized tomography scan, lung function tests, induced sputum collection, and bronchoscopy with bronchoalveolar lavage (BAL) and protected specimen brush. Patients with bronchiectasis were excluded. Secreted mucins (MUC2, MUC5AC, and MUC5B) and inflammatory markers were assessed in BAL and sputum by ELISA.<\/jats:p>\n                    <jats:p>Measurements and Main Results: We enrolled 45 patients, with mean age (\u00b1SD) of 67 (\u00b18) years and mean FEV1 of 41 (\u00b110) % predicted. A total of 31% (n\u2009=\u200914) of patients had potentially pathogenic micro-organisms in quantitative bacterial cultures of samples obtained by protected specimen brush. Patients with COPD with positive cultures had lower levels of MUC2 both in BAL (P\u2009=\u20090.02) and in sputum (P\u2009=\u20090.01). No differences in MUC5B or MUC5AC levels were observed among the groups. Lower MUC2 levels were correlated with lower FEV1 (r\u2009=\u20090.32, P\u2009=\u20090.04) and higher sputum IL-6 (r\u2009=\u2009\u22120.40, P\u2009=\u20090.01).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Airway MUC2 levels are decreased in patients with severe COPD colonized by potentially pathogenic micro-organisms. These findings may indicate one of the mechanisms underlying airway colonization in patients with severe COPD.<\/jats:p>\n                    <jats:p>Clinical trial registered with www.clinicaltrials.gov (NCT01976117).<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1513\/annalsats.201512-797oc","type":"journal-article","created":{"date-parts":[[2016,2,16]],"date-time":"2016-02-16T16:22:54Z","timestamp":1455639774000},"page":"636-642","source":"Crossref","is-referenced-by-count":26,"title":["Airway Mucin 2 Is Decreased in Patients with Severe Chronic Obstructive Pulmonary Disease with Bacterial Colonization"],"prefix":"10.1093","volume":"13","author":[{"given":"Oriol","family":"Sibila","sequence":"first","affiliation":[{"name":"Servei de Pneumologia, Hospital de la Santa Creu i Sant Pau, Universitat Aut\u00f2noma de Barcelona, Barcelona, Spain"},{"name":"Institut d\u2019Investigaci\u00f3 Biom\u00e8dica Sant Pau, Barcelona, 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