Abstract:
:Chronic exposure to tobacco smoke, which contains over 60 tumor-initiating carcinogens, is the major risk factor for development of lung cancer, accounting for a large portion of cancer-related deaths worldwide. It is well established that tobacco smoke is a tumor initiator, but we asked whether it also acts as a tumor promoter once malignant initiation, such as caused by K-ras activation, has taken place. Here we demonstrate that repetitive exposure to tobacco smoke promotes tumor development both in carcinogen-treated mice and in transgenic mice undergoing sporadic K-ras activation in lung epithelial cells. Tumor promotion is due to induction of inflammation that results in enhanced pneumocyte proliferation and is abrogated by IKKbeta ablation in myeloid cells or inactivation of JNK1.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Takahashi H,Ogata H,Nishigaki R,Broide DH,Karin Mdoi
10.1016/j.ccr.2009.12.008subject
Has Abstractpub_date
2010-01-19 00:00:00pages
89-97issue
1eissn
1535-6108issn
1878-3686pii
S1535-6108(09)00430-9journal_volume
17pub_type
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