Abstract
Metastasis tumor antigen 1 (MTA1), a novel candidate metastasis-associated gene, is known to increase the migration and invasion of various tumor cells in vitro. Expression of MTA1 has been shown to be closely correlated with aggressiveness in a variety of human cancers including non-small cell lung cancer (NSCLC). Cigarette smoke is the most established risk for lung carcinogenesis; however, its effects on the progression of NSCLC are still unclear. In this study, we investigated MTA1 expression and analyzed its association with cigarette smoke in NSCLC by immunohistochemistry. To gain a deeper insight into the molecular mechanism underlying the relation between MTA1 and cigarette smoke, we treated the NSCLC cell lines with cigarette smoke extract (CSE). MTA1 mRNA levels and proteins were detected in NSCLC cell lines via reverse transcriptase-polymerase chain reaction (RT-PCR) and western blot analysis. Matrigel invasion assay was performed to evaluate cell invasive ability with the treatment of CSE. Immunohistochemical analysis showed MTA1 expression in NSCLC (61/96, 63.5%) was higher than that in adjacent normal lung tissues (15/96, 15.6%; p < 0.05). Moreover, it was significantly associated with smoking history (p < 0.05). The results of RT-PCR and western blotting showed the upregulation of MTA1 after the treatment of CSE in NSCLC cell lines. Matrigel invasion assays showed that MTA1 upregulation and cell invasion was accompanied with the treatment of CSE in the NSCLC cell lines. MTA1 expression correlated with cigarette smoke in NSCLC and suggested that it may play an important role in the smoked-related progress of NSCLC.
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Xu, L., Mao, Xy., Fan, Cf. et al. MTA1 expression correlates significantly with cigarette smoke in non-small cell lung cancer. Virchows Arch 459, 415–422 (2011). https://doi.org/10.1007/s00428-011-1141-7
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DOI: https://doi.org/10.1007/s00428-011-1141-7