European ancestry increases breast cancer risk among Latinas

	Tweet

Latina women have a lower risk of breast cancer than European or African-American women generally, but those with higher European ancestry could be at increased risk, according to data published in the December 1 issue of Cancer Research, a journal of the American Association for Cancer Research.

“We need to study the possible factors that are placing Latina women of high European ancestry at greater risk,” said Laura Fejerman, Ph.D., a post-doctoral research fellow at the University of California San Francisco. “The increased risk could be due to environmental factors, genetic factors or the interplay of the two.”

Latinas are what geneticists refer to as an “admixed” population with most of their genetic ancestry from European or indigenous Americans. Fejerman said the term “indigenous Americans” usually refers to the groups that lived on the American continent prior to the arrival of the European colonizers. 

For the current study, Fejerman and colleagues identified the genetic ancestry of 440 Latina women with breast cancer and 597 Latina women who did not have breast cancer.

For every 25 percent increase in European ancestry there is a 79 percent increase in the risk of breast cancer. If a woman had an estimated European ancestry of 25 percent she would be 79 percent more likely to have breast cancer than a woman of full indigenous American ancestry.

After accounting for known risk factors like number of full-term pregnancies or months of breastfeeding, the breast cancer risk for every 25 percent increase in European ancestry decreased to 39 percent, but it remained statistically significant.

Fejerman said that the overall risk of Latinas in the US is less than in European Americans but higher than indigenous Americans. She said further research would need to be conducted to determine if these differences are due to the presence of non-genetic risk factors that have not yet been described and that vary with ancestry, to the effect of genetic variants that either are protective or increase risk, or the result of the interaction between genes and non-genetic factors.

###

The mission of the American Association for Cancer Research is to prevent and cure cancer. Founded in 1907, AACR is the world’s oldest and largest professional organization dedicated to advancing cancer research. The membership includes more than 28,000 basic, translational and clinical researchers; health care professionals; and cancer survivors and advocates in the United States and 80 other countries. The AACR marshals the full spectrum of expertise from the cancer community to accelerate progress in the prevention, diagnosis and treatment of cancer through high-quality scientific and educational programs. It funds innovative, meritorious research grants. The AACR Annual Meeting attracts more than 17,000 participants who share the latest discoveries and developments in the field. Special conferences throughout the year present novel data across a wide variety of topics in cancer research, treatment and patient care. The AACR publishes five major peer-reviewed journals: Cancer Research; Clinical Cancer Research; Molecular Cancer Therapeutics; Molecular Cancer Research; and Cancer Epidemiology, Biomarkers & Prevention. The AACR’s most recent publication and its sixth major journal, Cancer Prevention Research, is dedicated exclusively to cancer prevention, from preclinical research to clinical trials. The AACR also publishes CR, a magazine for cancer survivors and their families, patient advocates, physicians and scientists. CR provides a forum for sharing essential, evidence-based information and perspectives on progress in cancer research, survivorship and advocacy.

Contact: Jeremy Moore

267-646-0557
American Association for Cancer Research

RELATED STORIES:
Discovery suggests new combination therapy strategy for basal-like breast cancers   Dieting reduces lymphedema after breast cancer   Drug May Combat Weight Loss During Radiation Treatments   Suspicion Lingers Over Bisphenol A and Breast Cancer   Smoking Did Not Influence Breast Cancer Risk Among Obese Women   Repeat MRI screening for breast cancer results in fewer false positives   Early Xeloda does not help in breast cancer- study   Breast-Sparing Surgery Means More Procedures   Roadmap published for dynamic mapping of estrogen signaling in breast cancer   Australian scientists plan to regrow breasts after cancer   Work in clothing, textiles linked to breast cancer   Even women with a family history can control breast cancer risk   Breast cancer outcome similar in women and men   Hormone therapy use by postmenopausal women may increase incidence of more advanced breast cancer   Breast symmetry can be early indicator of breast cancer   Breast Cancer Surgery Preserves Artery for Future Heart Surgery   Mammography may increase breast cancer risk in some high-risk women   UK wants results of breast implant review this week   Breast Cancer Incidence Among Iraqi Women Profiled   France to offer surgery if breast implants a risk   Roche says studies show its drugs help breast cancer   UK agency nearer backing new breast cancer drugs

Comments

[ + Post Your Own ]

Now you're in the public comment zone. What follows is not Armenian Medical Network's stuff; it comes from other people and we don't vouch for it. A reminder: By using this Web site you agree to accept our Terms of Service. Click here to read the Rules of Engagement.

There are no comments for this entry yet. [ + Comment here + ]