PMID- 27191981 OWN - NLM STAT- MEDLINE DCOM- 20180116 LR - 20220330 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 25 DP - 2016 Jun 21 TI - Crosstalk between the HIF-1 and Toll-like receptor/nuclear factor-kappaB pathways in the oral squamous cell carcinoma microenvironment. PG - 37773-37789 LID - 10.18632/oncotarget.9329 [doi] AB - Hypoxia is a prominent feature of the microenvironment of solid tumors and may contribute to tumor progression through the oxygen-sensitive transcriptional regulator hypoxia-inducible factor-1 (HIF-1). Chronic inflammation is another typical feature. Inflammatory mediators, including Toll-like receptors (TLRs) and nuclear factor-kappaB (NF-kappaB), play an important role in cancer development. Recent studies have revealed extensive cross-talk between hypoxia and inflammation signaling, though the mechanisms remain unclear. Our results confirm that TLR3 and TLR4 are highly expressed in oral squamous cell carcinoma (OSCC). Activation of TLR3 and TLR4 stimulated the expression of HIF-1 through NF-kappaB. In addition, HIF-1 increased the expression of TLR3 and TLR4 through direct promoter binding. Thus, the TLR/NF-kappaB pathway forms a positive feedback loop with HIF-1. These results indicate a novel cross-talk between the TLR/NF-kappaB and HIF-1 signaling, which may contribute to OSCC initiation and progression. With the elucidation of this novel mechanism, it might serve as a basis for future microenvironment targeted cancer therapy. FAU - Han, Shengwei AU - Han S AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Xu, Wenguang AU - Xu W AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Wang, Zhiyong AU - Wang Z AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Qi, Xiaofeng AU - Qi X AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Wang, Yufeng AU - Wang Y AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Ni, Yanhong AU - Ni Y AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Shen, Hao AU - Shen H AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Hu, Qingang AU - Hu Q AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. FAU - Han, Wei AU - Han W AD - Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. AD - Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, P.R. China. LA - eng PT - Journal Article PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (HIF1A protein, human) RN - 0 (Hypoxia-Inducible Factor 1, alpha Subunit) RN - 0 (Lipopolysaccharides) RN - 0 (NF-kappa B) RN - 0 (TLR3 protein, human) RN - 0 (TLR4 protein, human) RN - 0 (Toll-Like Receptor 3) RN - 0 (Toll-Like Receptor 4) RN - 0 (VEGFA protein, human) RN - 0 (Vascular Endothelial Growth Factor A) RN - O84C90HH2L (Poly I-C) SB - IM MH - Carcinoma, Squamous Cell/*metabolism MH - Cell Hypoxia MH - Cell Line, Tumor MH - Gene Expression Profiling MH - *Gene Expression Regulation, Neoplastic MH - HEK293 Cells MH - Humans MH - Hypoxia-Inducible Factor 1, alpha Subunit/*metabolism MH - Inflammation MH - Lipopolysaccharides/chemistry MH - Mouth Neoplasms/*metabolism MH - NF-kappa B/*metabolism MH - Poly I-C/chemistry MH - Signal Transduction MH - Toll-Like Receptor 3/metabolism MH - Toll-Like Receptor 4/metabolism MH - Tumor Microenvironment MH - Vascular Endothelial Growth Factor A/metabolism PMC - PMC5122348 OTO - NOTNLM OT - HIF-1 OT - NF-kappaB OT - TLR OT - oral squamous cell carcinoma OT - tumor microenvironment COIS- None. EDAT- 2016/10/23 06:00 MHDA- 2018/01/18 06:00 PMCR- 2016/06/21 CRDT- 2016/05/19 06:00 PHST- 2015/11/19 00:00 [received] PHST- 2016/04/28 00:00 [accepted] PHST- 2016/10/23 06:00 [pubmed] PHST- 2018/01/18 06:00 [medline] PHST- 2016/05/19 06:00 [entrez] PHST- 2016/06/21 00:00 [pmc-release] AID - 9329 [pii] AID - 10.18632/oncotarget.9329 [doi] PST - ppublish SO - Oncotarget. 2016 Jun 21;7(25):37773-37789. doi: 10.18632/oncotarget.9329.