Posted Bill Couzens,Founder Lesscancer.org

http://www.sciencedaily.com/releases/2008/05/080513130635.htm

Researchers Pinpoint How Smoking Causes Cancer
ScienceDaily (May 14, 2008) — Oregon Health & Science University Cancer Institute researchers have pinpointed the protein that can lead to genetic changes that cause lung cancer.

Researchers discovered that the production of a protein called FANCD2 is slowed when lung cells are exposed to cigarette smoke. Low levels of FANCD2 leads to DNA damage, triggering cancer. Cigarette smoke curbs the production of ‘caretaker’ proteins, like FANCD2, which normally prevent cancer by fixing damages in DNA and causing faulty cells to commit suicide.
Research has shown that smoking is strongly linked to lung cancer, but this discovery may help scientists improve treatments for lung disease in the future.

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http://www.sciencedaily.com/releases/2008/05/080513130635.htm