Alpha5 Nicotinic Acetylcholine Receptor Contributes to Nicotine-Induced Lung Cancer Development and Progression.

Alpha5 Nicotinic Acetylcholine Receptor Contributes to Nicotine-Induced Lung Cancer Development and Progression.
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Alpha5 烟碱乙酰胆碱受体有助于尼古丁诱导的肺癌的发生和进展

DOI:
10.3389/fphar.2017.00573
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发表时间:
2017
影响因子:
5.6
通讯作者:
Ma XL
Ma XL
中科院分区:
医学2区
文献类型:
--
作者:
Sun HJ;Jia YF;Ma XL

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尼古丁和烟碱乙酰胆碱受体 (nAChR) 被认为与肺癌风险、发病和进展有关,但它们在这些情况下的确切生理作用仍不清楚。我们之前的研究表明,α5-nAChR 介导尼古丁诱导的体外肺癌细胞增殖、迁移和侵袭。在本研究中,我们旨在确定 α5-nAChR 在非小细胞肺癌 (NSCLC) 发生和进展中的作用。我们的微阵列结果表明,敲低编码 α5-nAChR 的 CHRNA5 基因可显着调节关键途径,包括细胞周期、DNA 复制、癌症途径。培养的 A549 细胞中 α5-nAChR 敲低会影响细胞周期分布、细胞凋亡和细胞周期蛋白表达。在体内,α5-nAChR 沉默抑制了肺部肿瘤的生长,尤其是在尼古丁暴露的情况下。重要的是,患者肿瘤中的 α5-nAChR 表达与原发 T 分期、N 分期和生存时间缩短相关。这些结果表明,α5-nAChR 沉默可抑制尼古丁相关 NSCLC 的进展,使该受体成为治疗尼古丁相关肺癌的潜在药理学靶点。
Nicotine and nicotinic acetylcholine receptors (nAChRs) are considered to be involved in lung cancer risk, onset and progression, but their precise physiological roles in these contexts remain unclear. Our previous studies suggested that α5-nAChR mediates nicotine-induced lung cancer cell proliferation, migration, and invasion in vitro. In this study, we aimed to determine the role of α5-nAChR in the development and progression of non-small cell lung cancer (NSCLC). Our microarray results reveal that knockdown of the CHRNA5 gene encoding α5-nAChR significantly modulates key pathways including the cell cycle, DNA replication, pathway in cancer. α5-nAChR knockdown in cultured A549 cells affected cell cycle distribution, apoptosis, and cyclin expression. In vivo, α5-nAChR silencing inhibited the growth of lung tumors, especially in the context of nicotine exposure. Importantly, α5-nAChR expression in patient tumors correlated with the primary T stage, N stage, and reduced survival time. These results reveal that α5-nAChR silencing inhibits the progression of nicotine-related NSCLC, making this receptor a potential pharmacological target for the treatment of nicotine-related lung carcinogenesis.
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