Friday, March 29, 2024
DENTON (UNT), Texas — At the University of North Texas, research is expanding understanding of significant health matters and encouraging individuals to take charge of their wellbeing.
Julia Heck, associate dean for research in the College of Health and Public Service, studies critical realms of women's health. She earned a doctorate in epidemiology
from Columbia University and completed a postdoctoral fellowship at the International
Agency for Research on Cancer, an agency of the World Health Organization. Some of
her recent research projects include investigating the impacts of per- and polyfluoroalkyl
substances (PFAS) exposure on eye cancer risk in children and exploring the correlation
between Alpha-1 Antitrypsin Deficiency (AATD) and pregnancy complications. Her research
sheds light on the effects of environmental toxins and genetic conditions on maternal
and child health, advocating for heightened awareness and proactive measures to safeguard
women's wellbeing during pregnancy and beyond.
‘Forever chemicals’ and the risk for retinoblastoma
One of those environmental toxin groups included in her research are PFAS. PFAS are chemicals that resist grease, oil, water and heat. They were first used in the 1940s and are now in hundreds of products. The gradual buildup of PFAS in the body can lead to multiple health issues, including immune system disruption, cancer risks and thyroid hormone interference.
“PFAS are in a lot of things around us, and they’re of concern because they’re known as ‘forever chemicals,’” Heck said. “They take a long time to break down in the environment and accumulate in our bodies over time. Common sources of exposure include fast food wrappers, frying pans and drinking water. To limit PFAS exposure, you can avoid certain products, choose PFAS-free alternatives, use water filtration and dispose of items responsibly.”
Heck and her research collaborators, Yixin Chen, Kimberly Paul, Douglas Walker, Dean Jones, Xuexia Wang, and Beate Ritz, at Emory University, UCLA, and Florida International University, studied medical data from 501 children with retinoblastoma and 899 children without retinoblastoma born from 1983 to 2011 to 755 U.S.-born and 366 Mexico-born mothers in California.
Perfluorooctanesulfonic acid (PFOS), perflurooctanoic acid (PFOA) and perfluorononanoic acid (PFNA) were identified from neonatal blood samples collected through the California newborn Genetic Disease Screening Program. Using logistic regression, the team assessed whether an increase of PFAS levels or having above-average levels of PFAS in blood affects retinoblastoma risk overall.
Among all children, above-average PFOS levels at birth increased the odds of retinoblastoma overall by 29% and unilateral retinoblastoma, cancer of only one eye, by 42%. For children of Mexico-born mothers, the team estimated the highest odds of retinoblastoma overall and bilateral retinoblastoma, cancer of both eyes, with above-average PFOS levels. Among children of U.S.-born mothers, higher PFOS levels increased the odds of unilateral retinoblastoma by 15% and by 71% among children with above-average PFOS levels. In addition, for children of U.S.-born mothers, PFOA increased the odds of retinoblastoma overall.
“These results suggest that PFOS and PFOA might contribute to retinoblastoma risk in children born in California,” Heck said.
Alpha-1 Antitrypsin Deficiency and pregnancy complications
Heck’s other research on genetic conditions focuses on the impact of AATD and Alpha-1 Antitrypsin deficiencies in pregnancy can have on birth outcomes. AATD is a condition caused by not having enough of a protein called alpha-1 antitrypsin. This protein normally helps keep the lungs healthy by protecting them from damage caused by certain enzymes released by white blood cells. Without enough of this protein, conditions may develop such as chronic obstructive pulmonary disease and emphysema. Additionally, AATD can affect the liver, causing liver disease in some individuals.
“AATD is linked to lung and liver diseases, but its impact on pregnancy and birth outcomes lacks large-scale studies,” Heck said. “Symptoms like wheezing often lead to misdiagnosis as asthma, emphasizing the need for early detection.”
Heck investigated the risk of pregnancy complications and adverse birth outcomes in mothers and children with AATD. Using a cohort of 305 Danish mothers and 254 children with AATD from 1973 to 2013, the team conducted a Poisson regression data analysis model to examine associations between alpha-1 antitrypsin deficiency, adverse birth outcomes and pregnancy complications in the mothers and children.
Heck’s research, supported by a grant from the Alpha-1 Foundation, indicates that pregnancy in women with AATD contributes to low birth weight of their babies, cesarean-section delivery, preterm birth and preeclampsia. These findings underscore the importance of close monitoring during pregnancy for women with AATD, suggesting routine screening for better management, despite its inherited nature. Routine screening for alpha-1 antitrypsin in pregnancy may be considered among mothers with a pulmonary and liver disease history.
“It was in the process of studying childhood cancer that the importance of healthy pregnancies became apparent,” Heck said. “Challenges in my own pregnancies also were a motivator to study birth outcomes.”
As UNT continues its meaningful contributions to health research, its commitment to holistic wellbeing extends to on-campus health care services.
UNT’s Student Health and Wellness Center (SHWC) provides comprehensive medical care for students, including treatment for injuries, illnesses and laboratory services. Additionally, the SHWC prioritizes health education, offering resources to promote women’s health and support students academically. The Office of Health Promotion, the health education arm of the SHWC, offers tailored services and activities to enhance student wellbeing.
"As part of our student wellness efforts, we encourage them to take an active role in their health,” said Danielle Gemoets, senior student success coordinator for the Office of Health Promotion and a registered dietitian nutritionist at the SHWC. “Research shows that seeking out health information helps you make better decisions about your care. When visiting health care providers, don't hesitate to ask questions, share concerns and speak up for yourself. Your input matters, and by giving feedback, you help us improve our services."
UNT News Service Phone Number: (940) 565-2108
Media Contacts:
Chelsey Gilbert
Chelsey.Gilbert@unt.edu
940-369-7019
From UNT News – Engineering