Nieh Shin, Jao Shu-Wen, Yang Chin-Yuh, Lin Yaoh-Shiang, Tseng Yi-Han, Liu Chia-Lin, Lee Tsai-Yu, Liu Tsung-Yun, Chu Yueng-Hsiang, Chen Su-Feng
Department and Graduate School of Pathology, National Defense Medical Center & Tri-Service General Hospital, Taipei, Taiwan.
Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan.
Head Neck. 2015 Dec;37(12):1712-21. doi: 10.1002/hed.23820. Epub 2015 Jun 18.
BACKGROUND: Recent studies suggest that long-term exposure of the carcinogen 4-methylnitrosamino-1-3-pyridyl-1-butanone (NNK) found in tobacco smoke is involved in the progression of head and neck squamous cell carcinoma (HNSCC). The underlying nicotine-mediated mechanism remains unclear. METHODS: An analysis of SCC-25 and Fadu cells with or without NNK exposure focusing on the evaluation of migration and invasion abilities, the expression of epithelial-mesenchymal transition, drug-resistance-related genes, properties of cancer stem cells (CSCs), and anti-apoptosis was performed. RESULTS: Long-term NNK exposure enhances migration and invasion with morphological alterations in a dose-dependently manner. Furthermore, NNK exposure also upregulates Snail, promotes sphere-forming ability, and overexpresses aldehyde dehydrogenase 1 (ALDH1), Nanog, OCT4, ABCG2, and MDR1. CONCLUSION: The current study confirmed that long-term NNK exposure plays a role in HNSCC by increasing anti-apoptosis and therapeutic resistance via the Snail-RKIP signaling pathway. Our data also suggest that α7 nicotinic acetylcholine receptor (α7-nAChR) inhibition or targeting Snail may provide a feasible rationale for preventing the progression of HNSCC.
背景:近期研究表明,烟草烟雾中发现的致癌物4-甲基亚硝胺基-1-(3-吡啶基)-1-丁酮(NNK)的长期暴露与头颈部鳞状细胞癌(HNSCC)的进展有关。潜在的尼古丁介导机制仍不清楚。 方法:对暴露或未暴露于NNK的SCC-25和Fadu细胞进行分析,重点评估迁移和侵袭能力、上皮-间质转化的表达、耐药相关基因、癌症干细胞(CSC)特性以及抗凋亡情况。 结果:长期NNK暴露以剂量依赖方式增强迁移和侵袭并伴有形态改变。此外,NNK暴露还上调Snail、促进成球能力,并使醛脱氢酶1(ALDH1)、Nanog、OOOorkun,促进成球能力,并使醛脱氢酶1(ALDH1)、Nanog、OCT4、ABCG2和MDR1过表达。 结论:当前研究证实,长期NNK暴露通过Snail-RKIP信号通路增加抗凋亡和治疗耐药性,在HNSCC中发挥作用。我们的数据还表明,抑制α7烟碱型乙酰胆碱受体(α7-nAChR)或靶向Snail可能为预防HNSCC进展提供可行的理论依据。 (原文中“orkun”疑似有误,未进行翻译调整)
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