Genetic mutation linked to asbestos exposure

June 15, 2011

Mice inhabiting an area known for its high concentration of asbestos-contaminated dust, have a higher level of genetic somatic mutations, compared with other regions where asbestos pollution levels are lower. This has been shown in a new study carried out by Dr. Rachel Ben-Shlomo and Dr. Uri Shanas of the University of Haifa's Department of Biology in Oranim. "This study clearly indicates that there is a link between the higher levels of asbestos in the environment and the frequency of genetic somatic mutations in the mammals," the scientists said.

Earlier studies of asbestos have already shown that the thin fibers, which penetrate the body by or through consumption of food contaminated with the material, not only cause certain cancers but also genetic mutations in . It is also known that asbestos is a material that decomposes slowly, over many years. Data from the Israeli Ministry of Health indicate a rise in the number of from exposure to asbestos in the Western Galilee region of northern Israel, and therefore the scientists set out to examine whether are found in the mouse population living in its northern town of Nahariya. They chose to probe mutations in mice because their generations are renewed every three months, so it could be assumed for the study that dozens of generations of this sample population in Nahariya had already been exposed to the fibers.

Wild mice from two locations were sampled – one group living close to a factory that manufactured asbestos-based products in Nahariya during 1952-1997, and a second group from a town located 50 kilometers, or 31 miles, from Nahariya and where no known asbestos pollutants are found. Samples were taken from both groups and six sites in the DNA were examined for genetic differences between the groups.

The results indicated differences between the groups' DNA and that the Nahariya-based mice had higher levels of genetic somatic mutations.

"These findings teach us that the pollutive, mutagenic asbestos increases somatic mutational frequency, which can in turn heighten the chances of developing cancerous growths," the researchers concluded.

Explore further: Deaths and major morbidity from asbestos-related diseases in Asia likely to surge in next 20 years

Related Stories

Recommended for you

Losing sleep over climate change

May 26, 2017

Climate change may keep you awake—and not just metaphorically. Nights that are warmer than normal can harm human sleep, researchers show in a new paper, with the poor and elderly most affected. According to their findings, ...

Vitamin D supplements could help pain management

May 23, 2017

Vitamin D supplementation combined with good sleeping habits may help manage pain-related diseases. This paper published in the Journal of Endocrinology, reviews published research on the relationship between vitamin D levels, ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.