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Pepsin as a biomarker for laryngopharyngeal reflux in children with laryngomalacia
Author(s) -
Luebke Kendra,
Samuels Tina L.,
Chelius Thomas H.,
Sulman Cecille G.,
McCormick Michael E.,
Kerschner Joseph E.,
Johnston Nikki,
Chun Robert H.
Publication year - 2017
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.26537
Subject(s) - laryngomalacia , laryngopharyngeal reflux , pepsin , medicine , gastroenterology , reflux , laryngoscopy , stridor , surgery , airway , biology , intubation , disease , biochemistry , enzyme
Objectives/Hypothesis 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. Study Design Prospective case‐control study comparing patients under age 3 years with laryngomalacia to children without laryngomalacia. Methods 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‐millimeter arytenoid biopsies were collected from laryngomalacia patients. Pepsin Western blot and enzyme‐linked immunosorbent assay were performed. Results Ten laryngomalacia and five control subjects were enrolled. Pepsin was detected in lavages of laryngomalacia patients (8/10) but absent in controls (0/5; P = .007). Pepsin was observed more frequently in lavages (8/10) than biopsies (4/10; P = .046) of laryngomalacia subjects. Higher median pepsin concentration was observed in laryngomalacia than control lavages ( P = .025). Conclusions 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. Level of Evidence 3b. Laryngoscope , 127:2413–2417, 2017