인후두 역류에서 펩신의 역할
The Role of Pepsin in Laryngopharyngeal Reflux
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초록
Laryngopharyngeal reflux (LPR) is a very prevalent condition with a rising incidence. The diagnosis remains challenging and often controversial because the pathophysiology of LPR is often poorly understood and there is currently no diagnostic gold standard for LPR. Pepsin is produced by gastric chief cells in zymogen form as pepsinogen, and subsequently cleaved by the hydrochloric acid in the stomach, generating active pepsin protein. Pepsin is only produced in the stomach, and thus when detected in the laryngopharynx, it can be used as a specific marker for reflux. The carcinogenic properties of the gastric contents may also lead to cancer in target organs especially considering that they do not have intrinsic protective mechanisms as found in the esophagus. Many studies have demonstrated a high prevalence of LPR in patients with laryngeal cancer, but these studies are confounded by the cofactor such as smoking and alcohol consumption. This review focuses on the current studies about pepsin as a specific marker for LPR and putative relationship between pepsin and laryngeal cancer.
Abstract
Laryngopharyngeal reflux (LPR) is a very prevalent condition with a rising incidence. The diagnosis remains challenging and often controversial because the pathophysiology of LPR is often poorly understood and there is currently no diagnostic gold standard for LPR. Pepsin is produced by gastric chief cells in zymogen form as pepsinogen, and subsequently cleaved by the hydrochloric acid in the stomach, generating active pepsin protein. Pepsin is only produced in the stomach, and thus when detected in the laryngopharynx, it can be used as a specific marker for reflux. The carcinogenic properties of the gastric contents may also lead to cancer in target organs especially considering that they do not have intrinsic protective mechanisms as found in the esophagus. Many studies have demonstrated a high prevalence of LPR in patients with laryngeal cancer, but these studies are confounded by the cofactor such as smoking and alcohol consumption. This review focuses on the current studies about pepsin as a specific marker for LPR and putative relationship between pepsin and laryngeal cancer.
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