{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T03:14:37Z","timestamp":1787800477194,"version":"build-2784847793"},"reference-count":28,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2017,2,22]],"date-time":"2017-02-22T00:00:00Z","timestamp":1487721600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Laryngoscope"],"published-print":{"date-parts":[[2017,10]]},"abstract":"<jats:sec><jats:title>Objectives\/Hypothesis<\/jats:title><jats:p>Laryngomalacia is a common cause of newborn stridor. Laryngopharyngeal reflux (LPR) has been associated with laryngomalacia. Although pepsin, a component of LPR, has been associated with inflammatory diseases of the aerodigestive tract, its presence in the airways of laryngomalacia patients is unknown.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design<\/jats:title><jats:p>Prospective case\u2010control study comparing patients under age 3 years with laryngomalacia to children without laryngomalacia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Children less than 3 years old undergoing supraglottoplasty for laryngomalacia or surgery unrelated to the airway, without a history of laryngomalacia, reflux, or respiratory disease, were offered enrollment. Supraglottic lavage samples (3 mL) were obtained from all subjects. Two\u2010millimeter arytenoid biopsies were collected from laryngomalacia patients. Pepsin Western blot and enzyme\u2010linked immunosorbent assay were performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Ten laryngomalacia and five control subjects were enrolled. Pepsin was detected in lavages of laryngomalacia patients (8\/10) but absent in controls (0\/5; <jats:italic>P<\/jats:italic> = .007). Pepsin was observed more frequently in lavages (8\/10) than biopsies (4\/10; <jats:italic>P<\/jats:italic> = .046) of laryngomalacia subjects. Higher median pepsin concentration was observed in laryngomalacia than control lavages (<jats:italic>P<\/jats:italic> = .025).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Pepsin in supraglottic specimens demonstrated an association with laryngomalacia, supporting a role for refluxed pepsin in laryngomalacia. These data corroborate previous work implicating pepsin in inflammatory diseases of the upper airways. Further studies are warranted to investigate the contribution of pepsin to the pathophysiology of laryngomalacia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p>3b. <jats:italic>Laryngoscope<\/jats:italic>, 127:2413\u20132417, 2017<\/jats:p><\/jats:sec>","DOI":"10.1002\/lary.26537","type":"journal-article","created":{"date-parts":[[2017,2,22]],"date-time":"2017-02-22T06:09:01Z","timestamp":1487743741000},"page":"2413-2417","source":"Crossref","is-referenced-by-count":26,"title":["Pepsin as a biomarker for laryngopharyngeal reflux in children with laryngomalacia"],"prefix":"10.1002","volume":"127","author":[{"given":"Kendra","family":"Luebke","sequence":"first","affiliation":[{"name":"Department of Otolaryngology Children's Hospital of Wisconsin Milwaukee Wisconsin U.S.A"},{"name":"Department of Otolaryngology and Communication Sciences Medical College of Wisconsin Milwaukee Wisconsin U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tina L.","family":"Samuels","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology and Communication Sciences Medical College of Wisconsin Milwaukee Wisconsin U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas H.","family":"Chelius","sequence":"additional","affiliation":[{"name":"Institute for Health and Society Medical College of Wisconsin Milwaukee Wisconsin U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cecille G.","family":"Sulman","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology Children's Hospital of Wisconsin Milwaukee Wisconsin U.S.A"},{"name":"Department of Otolaryngology and Communication Sciences Medical College of Wisconsin Milwaukee Wisconsin U.S.A"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael E.","family":"McCormick","sequence":"additional","affiliation":[{"name":"Department 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Wisconsin Milwaukee Wisconsin U.S.A"},{"name":"Department of Otolaryngology and Communication Sciences Medical College of Wisconsin Milwaukee Wisconsin 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