Featured Research

from universities, journals, and other organizations

Genetic Mutations Linked To The Practice Of Burning Coal In Homes In China

Date:
October 1, 2004
Source:
University Of Pittsburgh Medical Center
Summary:
According to a study directed by a University of Pittsburgh researcher, individuals in Xuan Wei County, China who are exposed to smoky coal emissions from cooking and heating their homes may carry genetic mutations that greatly increase their risk of developing lung cancer.

PITTSBURGH, Sept. 30 – According to a study directed by a University of Pittsburgh researcher, individuals in Xuan Wei County, China who are exposed to smoky coal emissions from cooking and heating their homes may carry genetic mutations that greatly increase their risk of developing lung cancer. The study is being presented Sunday, Oct. 3, at the 35th Annual Meeting of the Environmental Mutagen Society being held Oct. 2 to 6 at the Pittsburgh Hilton and Towers.

"Lung cancer mortality rates in Xuan Wei are among the highest in China in both nonsmoking women and men who smoke, and are associated with exposure to indoor emissions from the burning of smoky coal," said Phouthone Keohavong, Ph.D., study author and associate professor, department of environmental and occupational health, University of Pittsburgh Graduate School of Public Health (GSPH). "In order to account for the high rates of disease within this region, we tested for mutations generally associated with lung cancer in people who had no evidence of disease. We found that a good number of these individuals had mutations that indicated they were at higher risk for developing lung cancer in the future."

The study analyzed sputum samples from the bronchial tract of 92 individuals who had no evidence of lung cancer and screened them for p53 and K-ras mutations. Damage to both p53, a tumor suppressor gene that prevents normal cells from turning into tumor cells, and K-ras, an oncogene, is fundamental to the development of a vast majority of cancers. Mutations to both p53 and K-ras are thought to be primarily caused by chemicals called polycyclic aromatic hydrocarbons that are emitted during the burning of smoky coal. The study found that 15 individuals, or 16.3 percent, tested positive for genetic mutations – 13 individuals tested positive for p53 mutations, one tested positive for K-ras mutation and one tested positive for both p53 and K-ras mutations.

According to Dr. Keohavong, also a faculty member at the University of Pittsburgh Cancer Institute, these findings are similar to other studies in which he and colleagues found that the frequencies and types of K-ras and p53 mutations in women from Xuan Wei who were nonsmokers were similar to the mutations found in men from Xuan Wei who smoked.

"Tobacco smoking is rare in women from Xuan Wei, yet the female population has an abnormally high lung cancer death rate," said Dr. Keohavong. "Women in this region traditionally start the fires and cook, spending more time inside homes that lack ventilation. As a result, they are more likely to be exposed to potentially dangerous emissions."

The lung cancer mortality rate in some communities in Xuan Wei County is among the highest in China, and more than 20 times that country's national average. The levels of polycyclic aromatic hydrocarbons generated during cooking with smoky coal are comparable to exposure levels experienced by coke oven workers.

Co-authors of the study include Qing Lan, Ph.D., division of cancer epidemiology and genetics, National Cancer Institute; Wei-Min Gaol, Ph.D., department of internal medicine, University of Michigan, Ann Arbor; Kui-Cheng Zheng, Ph.D., department of environmental and occupational health, University of Pittsburgh Graduate School of Public Health; Hussam H. Mady, M.D., and Mona F. Melhem, M.D., department of pathology, University of Pittsburgh School of Medicine; and Judy L. Mumford, Ph.D., National Health and Environmental Effects Laboratory, U.S. Environmental Protection Agency. The study was funded by a grant from the American Cancer Society.

###

Founded in 1948 and fully accredited by the Council on Education for Public Health, GSPH is world-renowned for contributions that have influenced public health practices and medical care for millions of people. One of the top-ranked schools of public health in the United States, GSPH is the only fully-accredited school of public health in the Commonwealth of Pennsylvania, with alumni who are among the leaders in their fields of public health. A member of the Association of Schools of Public Health, GSPH currently ranks third among schools of public health in NIH funding received. The only school of public health in the nation with a chair in Minority Health, GSPH is a leader in research related to women's health, HIV/AIDS and human genetics, among others. For more information, please visit GSPH's Web site at http://www.publichealth.pitt.edu.


Story Source:

The above story is based on materials provided by University Of Pittsburgh Medical Center. Note: Materials may be edited for content and length.


Cite This Page:

University Of Pittsburgh Medical Center. "Genetic Mutations Linked To The Practice Of Burning Coal In Homes In China." ScienceDaily. ScienceDaily, 1 October 2004. <www.sciencedaily.com/releases/2004/10/041001092558.htm>.
University Of Pittsburgh Medical Center. (2004, October 1). Genetic Mutations Linked To The Practice Of Burning Coal In Homes In China. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2004/10/041001092558.htm
University Of Pittsburgh Medical Center. "Genetic Mutations Linked To The Practice Of Burning Coal In Homes In China." ScienceDaily. www.sciencedaily.com/releases/2004/10/041001092558.htm (accessed August 1, 2014).

Share This




More Health & Medicine News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Texas Quintuplets Head Home

Texas Quintuplets Head Home

Reuters - US Online Video (Aug. 1, 2014) After four months in the hospital, the first quintuplets to be born at Baylor University Medical Center head home. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Ebola Patient Coming to U.S. for Treatment

Ebola Patient Coming to U.S. for Treatment

Reuters - US Online Video (Aug. 1, 2014) A U.S. aid worker infected with Ebola while working in West Africa will be treated in a high security ward at Emory University in Atlanta. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Ebola Vaccine Might Be Coming, But Where's It Been?

Ebola Vaccine Might Be Coming, But Where's It Been?

Newsy (Aug. 1, 2014) Health officials are working to fast-track a vaccine — the West-African Ebola outbreak has killed more than 700. But why didn't we already have one? Video provided by Newsy
Powered by NewsLook.com
Study Links Certain Birth Control Pills To Breast Cancer

Study Links Certain Birth Control Pills To Breast Cancer

Newsy (Aug. 1, 2014) Previous studies have made the link between birth control and breast cancer, but the latest makes the link to high-estrogen oral contraceptives. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins