Pepsin promotes laryngopharyngeal neoplasia by modulating signaling pathways to induce cell proliferation

Autoři: Kai Niu aff001;  Chunjie Guo aff002;  Shiyong Teng aff003;  Dandan Zhou aff002;  Shuyuan Yu aff001;  Wanzhong Yin aff001;  Ping Wang aff001;  Wei Zhu aff001;  Maoli Duan aff004
Působiště autorů: Department of Otolaryngology Head and Neck Surgery, the First Hospital of Jilin University, Changchun, PR China aff001;  Department of Radiology, the First Hospital of Jilin University, Changchun, PR China aff002;  Department of Anesthesiology, the First Hospital of Jilin University, Changchun, PR China aff003;  Department of Clinical Science, Intervention and Technology, Department of Otolaryngology Head and Neck Surgery, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden aff004
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article


Pepsin plays an important role in laryngopharyngeal reflux (LPR), a risk factor for the development of hypopharyngeal squamous cell carcinomas (HPSCC). However, the role of pepsin in HPSCC is not clear. We show by immunohistochemistry that pepsin positivity occurs in a significant proportion of human primary HPSCC specimens, and in many cases matched adjacent uninvolved epithelia are negative for pepsin. Pepsin positivity is associated with nodal involvement, suggesting that pepsin may have a role in metastasis. Treatment of FaDu cancer cells with pepsin increased cell proliferation, possibly by inducing G1/S transition. We also observed significant changes in expression of genes involved in NF-kappaB, TRAIL and Notch signaling. Our data suggest that pepsin plays an important role in HPSCC and that targeting pepsin could have potential therapeutic benefits.

Klíčová slova:

Cancer treatment – Carcinogenesis – Cell proliferation – Cell staining – Cytokines – Notch signaling – Pepsins – Pepsin treatment


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