Featured Research

from universities, journals, and other organizations

Gene variations linked to lung cancer susceptibility in Asian women

Date:
November 11, 2012
Source:
NIH/National Cancer Institute
Summary:
An international group of scientists has identified three genetic regions that predispose Asian women who have never smoked to lung cancer. The finding provides further evidence that risk of lung cancer among never-smokers, especially Asian women, may be associated with certain unique inherited genetic characteristics that distinguishes it from lung cancer in smokers.

X-ray image of the chest with growth on the left side of the lung.
Credit: NIH/National Cancer Institute

An international group of scientists has identified three genetic regions that predispose Asian women who have never smoked to lung cancer. The finding provides further evidence that risk of lung cancer among never-smokers, especially Asian women, may be associated with certain unique inherited genetic characteristics that distinguishes it from lung cancer in smokers.

Lung cancer in never-smokers is the seventh leading cause of cancer deaths worldwide, and the majority of lung cancers diagnosed historically among women in Eastern Asia have been in women who never smoked. The specific genetic variations found in this study had not been associated with lung cancer risk in other populations.

Although environmental factors, such as secondhand smoke (also known as environmental tobacco smoke) or exhaust from indoor cooking are likely account for some cases of lung cancer among Asian women who have never smoked, they explain only a small proportion of the disease. To gain a better understanding of lung cancer in Asian female never-smokers, researchers from the National Cancer Institute (NCI), part of the National Institutes of Health, partnered with researchers from several other countries to create the Female Lung Cancer Consortium in Asia to conduct one of the largest genome-wide association studies (GWAS) in female never-smokers to date. GWAS compares DNA markers across the genome between people with a disease or trait to people without the disease or trait.

"This study is the first large-scale genome-wide association study of lung cancer among never-smoking females anywhere in the world," said Qing Lan, M.D., Ph.D., a senior investigator in NCI's Division of Cancer Epidemiology and Genetics, and the leader of the study.

The consortium, whose findings were reported Nov.11, 2012, online in Nature Genetics, conducted a GWAS that combined data from 14 studies that included a total of approximately 14,000 Asian women (6,600 with lung cancer and 7,500 without lung cancer). The studies included data on environmental factors, including exposure to secondhand smoke.

The consortium found that variations at three locations in the genome -- two on chromosome 6 and one on chromosome 10 -- were associated with lung cancer in Asian female never-smokers. The discovery on chromosome 10 was particularly significant because it has not been found in any other GWAS of lung cancer in white or Asian populations.

"Our study provides strong evidence that common inherited genetic variants contribute to an increased risk of lung cancer among Asian women who have never smoked," said Nathaniel Rothman, M.D., a senior investigator in NCI's Division of Cancer Epidemiology and Genetics and coauthor of the study. "These variants may also increase lung cancer risk associated with environmental factors, such as environmental tobacco smoke."

The researchers did not detect an association with variations at a location on chromosome 15 that has been associated with lung cancer risk in many previous GWAS of lung cancer in smokers. The absence of this association provides further support for the suggestion that the genetic variation on chromosome 15 may be smoking-related.

The researchers found some evidence that Asian women with one of the newly identified genetic variants may be more susceptible to the effects of environmental tobacco smoke. However, the authors note that more research is needed to draw definitive conclusions from this observation.

"This study is an example of how genome-wide association susceptibility studies can evaluate inherited genetic risk in populations with unique characteristics or environmental exposures," said Stephen J. Chanock, M.D., acting co-director of NCI's Center for Cancer Genomics and a co-author of the study. "We will continue to develop better, smarter applications of this technique and apply them to populations where we have detailed information on environmental factors to further our understanding of how inherited genetic factors modify risk from environmental exposures."

This work was supported by NCI's Division of Cancer Epidemiology and Genetics under intramural project number ZIACP010121.


Story Source:

The above story is based on materials provided by NIH/National Cancer Institute. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lan et al. Genome-wide association analysis identifies new lung cancer susceptibility loci in never-smoking women in Asia. Nature Genetics, 2012; DOI: 10.1038/ng.2456

Cite This Page:

NIH/National Cancer Institute. "Gene variations linked to lung cancer susceptibility in Asian women." ScienceDaily. ScienceDaily, 11 November 2012. <www.sciencedaily.com/releases/2012/11/121111153730.htm>.
NIH/National Cancer Institute. (2012, November 11). Gene variations linked to lung cancer susceptibility in Asian women. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2012/11/121111153730.htm
NIH/National Cancer Institute. "Gene variations linked to lung cancer susceptibility in Asian women." ScienceDaily. www.sciencedaily.com/releases/2012/11/121111153730.htm (accessed July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Courts Conflicted Over Healthcare Law

Courts Conflicted Over Healthcare Law

AP (July 22, 2014) Two federal appeals courts issued conflicting rulings Tuesday on the legality of the federally-run healthcare exchange that operates in 36 states. (July 22) Video provided by AP
Powered by NewsLook.com
Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
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