PMID- 26001828 OWN - NLM STAT- MEDLINE DCOM- 20151106 LR - 20211203 IS - 1551-5044 (Electronic) IS - 0022-1554 (Print) IS - 0022-1554 (Linking) VI - 63 IP - 9 DP - 2015 Sep TI - Silencing SOX2 Expression by RNA Interference Inhibits Proliferation, Invasion and Metastasis, and Induces Apoptosis through MAP4K4/JNK Signaling Pathway in Human Laryngeal Cancer TU212 Cells. PG - 721-33 LID - 10.1369/0022155415590829 [doi] AB - SRY (sex determining region Y)-box 2 (SOX2) plays an important role in tumor cell metastasis and apoptosis. Laryngeal squamous cell carcinoma (LSCC), responsible for 1.5% of all cancers, is one of the most common head and neck malignancies. Accumulating evidence shows that SOX2 is overexpressed in several human tumors, including lung cancer, esophageal carcinoma, pancreatic carcinoma, breast cancer, ovarian carcinoma and glioma. Our study aimed to investigate the silencing effects of SOX2 expression using RNA interference (RNAi) on various biological processes in laryngeal cancer TU212 cells, including proliferation, apoptosis, invasion and metastasis. We also studied the involvement of the MAPK/JNK signaling pathway in the biological effects of SOX2 siRNA in TU212 cells. We found that silencing SOX2 decreased the proliferation, migration, and invasion of TU212 cells, and induced apoptosis. This effect of silencing SOX2 could be reversed by silencing MAP4K4. Therefore, we consider SOX2 as a key regulator of the upstream MAP4K4/JNK signaling pathways that could be a potential therapeutic target in the treatment of patients with or prevention of laryngeal cancer. CI - (c) The Author(s) 2015. FAU - Yang, Ning AU - Yang N AD - Department of Otorhinolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China (NY, YW, LH, XL, XJ) FAU - Wang, Yan AU - Wang Y AD - Department of Otorhinolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China (NY, YW, LH, XL, XJ) FAU - Hui, Lian AU - Hui L AD - Department of Otorhinolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China (NY, YW, LH, XL, XJ) FAU - Li, Xiaotian AU - Li X AD - Department of Otorhinolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China (NY, YW, LH, XL, XJ) FAU - Jiang, Xuejun AU - Jiang X AD - Department of Otorhinolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China (NY, YW, LH, XL, XJ) LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150522 PL - United States TA - J Histochem Cytochem JT - The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society JID - 9815334 RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (RNA, Small Interfering) RN - 0 (SOXB1 Transcription Factors) RN - EC 2.7.1.11 (MAP4K4 protein, human) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.24 (JNK Mitogen-Activated Protein Kinases) SB - IM MH - Apoptosis/*genetics MH - Carcinoma, Squamous Cell/genetics/pathology MH - Cell Line, Tumor MH - Cell Movement/genetics MH - Cell Proliferation/genetics MH - Clone Cells/pathology MH - Disease Progression MH - Down-Regulation/genetics MH - Enzyme Activation/genetics MH - Gene Expression Regulation, Neoplastic/genetics MH - Humans MH - Intracellular Signaling Peptides and Proteins/*metabolism MH - JNK Mitogen-Activated Protein Kinases/*metabolism MH - Laryngeal Neoplasms/genetics/*pathology MH - MAP Kinase Signaling System/*genetics MH - Neoplasm Invasiveness MH - Neoplasm Metastasis MH - Phosphorylation/genetics MH - Protein Serine-Threonine Kinases/*metabolism MH - *RNA Interference MH - RNA, Small Interfering/genetics MH - SOXB1 Transcription Factors/deficiency/*genetics PMC - PMC4804729 OTO - NOTNLM OT - MAP4K4/JNK signaling pathways OT - SRY (sex determining region Y)-box 2 (SOX2) OT - apoptosis OT - invasion OT - laryngeal cancer TU212 cells OT - metastasis OT - proliferation OT - siRNA COIS- Competing Interests: The authors declared no potential competing interests with respect to the research, authorship, and/or publication of this article. EDAT- 2015/05/24 06:00 MHDA- 2015/11/07 06:00 PMCR- 2016/09/01 CRDT- 2015/05/24 06:00 PHST- 2015/02/27 00:00 [received] PHST- 2015/05/17 00:00 [accepted] PHST- 2015/05/24 06:00 [entrez] PHST- 2015/05/24 06:00 [pubmed] PHST- 2015/11/07 06:00 [medline] PHST- 2016/09/01 00:00 [pmc-release] AID - 0022155415590829 [pii] AID - 10.1369_0022155415590829 [pii] AID - 10.1369/0022155415590829 [doi] PST - ppublish SO - J Histochem Cytochem. 2015 Sep;63(9):721-33. doi: 10.1369/0022155415590829. Epub 2015 May 22.