SLPI and AnxA2 expression in neoplasm‑free palatine tonsils is associated with smoking habit of individuals

Quabius,Elgar  S.; Bögershausen,Berit; Getzin,Lukas; Görögh,Tibor; Gebhard,Maximilian   P.; Hoffmann,Anna  S.; Hoffmann,Markus

doi:10.3892/mco.2017.1343

SLPI and AnxA2 expression in neoplasm‑free palatine tonsils is associated with smoking habit of individuals

Authors:
- Elgar S. Quabius
- Berit Bögershausen
- Lukas Getzin
- Tibor Görögh
- Maximilian P. Gebhard
- Anna S. Hoffmann
- Markus Hoffmann
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Affiliations: Department of Otorhinolaryngology, Head and Neck Surgery, Christian‑Albrechts University, D‑24105 Kiel, Germany, Department of Otorhinolaryngology, University of Schleswig‑Holstein, D‑23538 Lübeck, Germany, Department of Pathology, University of Schleswig‑Holstein, D‑23538 Lübeck, Germany
Published online on: July 24, 2017 https://doi.org/10.3892/mco.2017.1343
Pages: 427-434

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Abstract

In order to confirm the inverse correlation between secretory leucocyte protease inhibitor (SLPI) expression, and human papillomavirus (HPV) infection previously observed in head and neck squamous‑cell carcinoma, the present study retrospectively investigated the association between SLPI and Annexin A2 (AnxA2) expression, and HPV status in non‑neoplastic chronic tonsillitis (n=118), and tonsillar hyperplasia (n=96) tissue. We hypothesised that smoking induces the upregulation of SLPI, resulting in reduced binding of HPV to AnxA2, a known modulator of HPV entry into the cell. SLPI and cyclin‑dependent kinase inhibitor 2A (p16INK4A) protein expression was measured using immunohistochemistry in 214 specimens; SLPI and AnxA2 gene expression was measured using reverse transcription-quantitative polymerase chain reaction in 213 cases; and DNA was isolated from all the specimens to determine HPV status. The association between the results of the aforementioned analyses and the smoking habits of patients was analysed. The samples were HPV‑negative. p16INK4A expression demonstrated moderate and strong staining in 38, and 0 cases, respectively. SLPI expression presented negative, weak and moderate signals in 163, 45, and 6 cases, respectively. A positive correlation was identified between smoking and SLPI (P=0.0001). Gene expression analysis (n=213) revealed that smoking (n=48) resulted in a significant increase in SLPI and AnxA2 expression. A significant positive correlation between AnxA2 and SLPI, indicating a surplus of AnxA2 in relation to SLPI, was exclusively identified in non‑smokers. The data demonstrated that smoking results in increased SLPI and AnxA2 expression also in non‑neoplastic tonsillar tissue. The observed surplus of AnxA2 in relation to SLPI identified exclusively in the tonsillar tissue of non‑smokers indicates a higher possibility of a successful HPV infection of the tonsillar tissue of non‑smokers, given the properties of AnxA2 to function as an infection modulator.

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