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PLOS ONE  2012 

Nicotine Promotes Tumor Growth and Metastasis in Mouse Models of Lung Cancer

DOI: 10.1371/journal.pone.0007524

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Abstract:

Nicotine is the major addictive component of tobacco smoke. Although nicotine is generally thought to have limited ability to initiate cancer, it can induce cell proliferation and angiogenesis in a variety of systems. These properties might enable nicotine to facilitate the growth of tumors already initiated. Here we show that nicotine significantly promotes the progression and metastasis of tumors in mouse models of lung cancer. This effect was observed when nicotine was administered through intraperitoneal injections, or through over-the-counter transdermal patches.

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