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Smoking has significant influence on our genes and how they function, say scientists at Southwest Foundation for Biomedical Research
July 13, 2010

SAN ANTONIO – In the largest study of its kind, researchers at the Southwest Foundation for Biomedical Research (SFBR) have found that exposure to cigarette smoke can alter gene expression -- the process by which a gene's information is converted into the structures and functions of a cell.  These alterations in response to smoking appear to have a wide-ranging negative influence on the immune system, and a strong involvement in processes related to cancer, cell death and metabolism.

The scientists indentified 323 unique genes whose expression levels were significantly correlated with smoking behavior in their study of 1,240 people. The changes were detected by studying the activity of genes within white blood cells of study participants.

“Our results indicate that not only individual genes but entire networks of gene interaction are influenced by cigarette smoking,” wrote lead author Jac Charlesworth, Ph.D., in the July 15 issue of the open access journal BMC Medical Genomics. Charlesworth, formerly at SFBR, is now a research fellow at the Menzies Research Institute at the University of Tasmania in Australia.

The study was funded by the National Institutes of Health and the Azar and Shepperd families of San Antonio, ChemGenex Pharmaceuticals and the AT&T Foundation. The study is part of SFBR’s San Antonio Family Heart Study (SAFHS) which includes 40 families in the Mexican American community.

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