University of Minnesota researchers gave 12 volunteers cigarettes spiked with a labeled carcinogen and found blood levels of a DNA-damaging breakdown product peaked 15 to 30 minutes after inhaling. Separate research suggests dietary selenium may curb smoke-related DNA damage.
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Lifestyle
More proof smoking damages DNA
A Chemical Research in Toxicology study reports that chronic arsenic exposure damaged DNA and increased cell survival in human prostate epithelial cells, altering DNA repair gene expression and raising mitochondrial transcription factor A. Arsenic is a known carcinogen, including for the prostate.
Lifestyle
Passive smoking more harmful than thought
Weill Cornell researchers measured nicotine and cotinine in 121 people and scanned their airway cells, finding that any detectable level, from passive or infrequent smoking, correlated with abnormal activity in genes tied to lung disease. The study appeared in AJRCCM.
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