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Home NEWS Science News Health

Maternal obesity linked to childhood cancer

Bioengineer by Bioengineer
July 10, 2019
in Health
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PITTSBURGH, July 10, 2019 – A new study from the University of Pittsburgh Graduate School of Public Health and UPMC Hillman Cancer Center found that children born to obese mothers were more likely to develop cancer in early childhood.

Using Pennsylvania birth records, the researchers found a correlation between pre-pregnancy body-mass index (BMI) in mothers and subsequent cancer diagnosis in their offspring, even after correcting for known risk factors, such as newborn size and maternal age. The final version of the paper published online today in the American Journal of Epidemiology.

“Right now, we don’t know of many avoidable risk factors for childhood cancer,” said lead author Shaina Stacy, Ph.D., postdoctoral scholar in the Pitt Public Health Department of Epidemiology and UPMC Hillman Cancer Center. “My hope is that this study can be, in a way, empowering and also motivating for weight loss.”

Stacy and colleagues pored through nearly 2 million birth records and about 3,000 cancer registry records filed in the state of Pennsylvania between 2003 and 2016 and found that children born to severely obese mothers–BMI above 40–had a 57% higher risk of developing leukemia before age 5. Weight and height also were individually associated with increased leukemia risk.

Further analysis showed that it wasn’t simply that larger women were giving birth to larger babies or that heavier women tended to be older–known risk factors for childhood cancer–but rather, a mother’s size independently contributed to her child’s risk.

The researchers think the root cause of the effect they’re seeing has something to do with insulin levels in the mother’s body during fetal development, or possibly changes to the mother’s DNA expression that are passed to her offspring.

Importantly, not all levels of obesity carry the same risk. Among the obese women in the study, higher BMI came with higher cancer rates in their children. So, even small amounts of weight loss can translate to a real reduction in risk, Stacy said.

“We are dealing with an obesity epidemic in this country,” said senior author Jian-Min Yuan, M.D., Ph.D., professor of epidemiology at Pitt Public Health and co-leader of the cancer epidemiology and prevention program at UPMC Hillman Cancer Center. “From a prevention point-of-view, maintaining a healthy weight is not only good for the mother, but also for the children, too.”

###

Additional authors on the study include Jeanine Buchanich, M.Ed., M.P.H., Ph.D., Christina Mair, Ph.D., Ravi Sharma, Ph.D., and Evelyn Talbott, Dr.P.H., M.P.H., of Pitt Public Health; Zhen-Quiang Ma, M.D., M.P.H., M.S., of the Pennsylvania Department of Health; and Linda Robertson, Dr.P.H., M.S.N., R.N., of UPMC Hillman Cancer Center.

This research was supported by grants from the National Cancer Institute (T32CA186873) and the Arnold Palmer Endowment Fund.

To read this release online or share it, visit http://www.upmc.com/media/news/071019-maternal-obesity-childhood-cancer.

About the University of Pittsburgh Graduate School of Public Health

The University of Pittsburgh Graduate School of Public Health, founded in 1948 and now one of the top-ranked schools of public health in the United States, conducts research on public health and medical care that improves the lives of millions of people around the world. Pitt Public Health is a leader in devising new methods to prevent and treat cardiovascular diseases, HIV/AIDS, cancer and other important public health problems. For more information about Pitt Public Health, visit the school’s Web site at http://www.publichealth.pitt.edu.

About UPMC Hillman Cancer Center

UPMC Hillman Cancer Center, the region’s only National Cancer Institute-designated Comprehensive Cancer Center, is one of the largest integrated community cancer networks in the United States. Backed by the collective strength of UPMC and the University of Pittsburgh School of Medicine, UPMC Hillman Cancer Center has more than 60 locations throughout Pennsylvania and Ohio with cancer centers and partnerships internationally. Consistently ranked by U.S. News & World Report for excellence in cancer care, the more than 2,000 physicians, researchers and staff are leaders in molecular and cellular cancer biology, cancer immunology, cancer virology, biobehavioral oncology, and cancer epidemiology, prevention, and therapeutics. UPMC Hillman Cancer Center is transforming cancer research, care, and prevention — one patient at a time.

http://www.upmc.com/media

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Erin Hare
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Related Journal Article

http://www.upmc.com/media/news/071019-maternal-obesity-childhood-cancer
http://dx.doi.org/10.1093/aje/kwz118

Tags: cancerCarcinogensDiet/Body WeightEating Disorders/ObesityEpidemiologyMedicine/HealthPediatricsPublic Health
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