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• W2740658608 abstract "Evidence has accumulated that chronic inflammation plays a critical role in carcinogenesis, tumor growth, and metastasis. To date, several inflammatory biomarkers are considered as potential prognostic factors in various cancers. The aim of the present study was to investigate the prognostic significance of the pretreatment levels of inflammatory biomarkers in patients with oropharyngeal squamous cell carcinoma (OPSCC). A total of 67 patients newly diagnosed as OPSCC was finally included. The neutrophil, lymphocyte, monocyte and platelet counts recorded before treatment was initiated, then lymphocyte-to-monocyte ratio (LMR), neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) were calculated. These inflammatory biomarkers and clinical parameters including age, differentiation, T-stage, N-stage, TNM-stage, smoking, and drinking were compared with progression-free survival (PFS) and overall survival (OS) using cox regression. Elevated monocyte count and advanced T-stage were significantly associated with poor PFS; in addition, these were independent prognostic factors for PFS. Elevated monocyte count and low LMR were significantly associated with poor OS; moreover, low LMR was an independent prognostic factor for OS. Of note, monocyte count and LMR were associated with prognosis more intensively in patients with p16-negative OPSCC. Following these results, we evaluated the peripheral blood mononuclear cells of 14 patients with OPSCC collected before treatments. CD14+ CD86+ HLR-DR+ cells were gated as monocytes, then divided into three subsets according to the expression of CD14 and CD16. The proportion of intermediate monocytes was lower and that of classical monocytes was higher in OPSCC patients than in healthy donors, especially in patients with elevated monocyte count. Furthermore, the expression level of PD-L1 was higher in patients than in healthy donors on all subsets. In conclusion, our data suggests that elevated monocyte count and low LMR seem to be useful biomarkers for predicting prognosis of OPSCC; furthermore, the population shift of monocytes may relate to poor prognosis of OPSCC. Citation Format: Hideyuki Takahashi, Koichi Sakakura, Kazuaki Chikamatsu. Prognostic significance and population shift of peripheral monocytes in patients with oropharyngeal squamous cell carcinoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 4627. doi:10.1158/1538-7445.AM2017-4627" @default.
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• W2740658608 date "2017-07-01" @default.
• W2740658608 modified "2023-09-26" @default.
• W2740658608 title "Abstract 4627: Prognostic significance and population shift of peripheral monocytes in patients with oropharyngeal squamous cell carcinoma" @default.
• W2740658608 doi "https://doi.org/10.1158/1538-7445.am2017-4627" @default.
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