The pathophysiology of laryngopharyngeal reflux (LPR) is still unclear although prevalence of this atypical reflux disease has grown. Missing correlation with detected gastroesophageal reflux episodes has been shown. The aim of this study was to test the hypothesis of local acid production due to laryngeal expression of H+K+-ATPase in patients suffering from LPR. For the first time we correlated clinical examination, including pharyngeal pH-measuring, with immunohistochemical staining and real-time qPCR of human laryngeal tissue in patients with LPR. In two out of 20 examined patients, we detected relevant acidic pharyngeal pH-values and found laryngeal expression of H+K+-ATPase. In these patients, PPI therapy was effective.
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The pathophysiology of laryngopharyngeal reflux (LPR) is still unclear although prevalence of this atypical reflux disease has grown. Missing correlation with detected gastroesophageal reflux episodes has been shown. The aim of this study was to test the hypothesis of local acid production due to laryngeal expression of H+K+-ATPase in patients suffering from LPR. For the first time we correlated clinical examination, including pharyngeal pH-measuring, with immunohistochemical staining and real-t...
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