Regina M. Santella, PhD
New York, New York
Professor of Environmental Health Sciences
Vice Dean for Faculty Affairs
Mailman School of Public Health
Co-leader Cancer Population Science Program
Herbert Irving Comprehensive Cancer Center
New York, New York
Developing better risk prediction models in high-risk individuals by incorporating biomarkers of environmental exposures, genetic susceptibility, and non-genetic alterations to DNA.
Environmental chemicals such as polyaromatic hydrocarbons (PAH) and dichlorodiphenyltrichloro-ethane (DDT) cause DNA damage that can lead to cancer. The severity of the damage and the ability to repair it influences the risk for development of breast cancer. Women with an already high risk of breast cancer, due to inherited factors or strong family history, may be more vulnerable to environmental pollutant exposure. Using the data from two established registries of high-risk families, Drs. Santella and Terry have been examining the impact of environmental exposures in young girls. Their studies include investigating how environmental exposures and genetic susceptibility—specifically as it relates to the ability to repair DNA damage—are related to breast cancer risk. This work will be used to develop better risk prediction models and allow for more precise preventive strategies.
In previous studies, Drs. Santella and Terry have shown that exposure to PAH, a common environmental pollutant, increased the risk of breast cancer in high-risk women. Using a method developed in their laboratories, they discovered that this risk is almost 3-fold greater in women whose cells were deficient in DNA repair functions.
In the coming year, Drs. Santella and Terry will continue their studies to confirm the role of DNA repair deficiency in breast cancer risk due to environmental exposures. In addition, they will employ new technologies to measure exposures of a broad range of environmental contaminants to better understand the impact of various environmental exposures on breast cancer risk.
Regina M. Santella, PhD, is a Professor of Environmental Health Sciences. She is a laboratory-based biochemist with extensive experience in the area of chemical carcinogenesis and molecular epidemiology. Her research is mainly focused on the use of biomarkers of exposure and genetic susceptibility to understand risk for cancer development. Her laboratory has developed antibodies and immunoassays to a number of carcinogen-DNA and protein adducts and uses these methods to determine exposure to environmental carcinogens. Other assays have been used to understand genetic susceptibility related to DNA repair capacity. More recently, her laboratory is investigating the use of epigenetic markers including global and gene specific methylation and microRNA expression in breast tumors and white blood cells to identify those at increased risk or as early biomarkers of disease. Her breast cancer studies take advantage of two large sample banks, the Long Island Breast Cancer Study Project, a population-based case-control study, and the Breast Cancer Family Registry of members of high risk families.
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