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Abstract Title:

In Utero DDT Exposure and Breast Density Before Age 50.

Abstract Source:

Reprod Toxicol. 2019 Nov 8. Epub 2019 Nov 8. PMID: 31711904

Abstract Author(s):

Nickilou Y Krigbaum, Piera M Cirillo, Julie D Flom, Jasmine A McDonald, Mary Beth Terry, Barbara A Cohn

Article Affiliation:

Nickilou Y Krigbaum

Abstract:

Prior studies in the Child Health and Development Studies (CHDS) found in utero exposure to the pesticide, dichlorodiphenyltrichloroethane (DDT), increased breast cancer risk by age 52. Mammographic density is considered a primary risk factor for breast cancer. We conducted a study of 309 daughters from the CHDS to examine in utero DDT exposure and mammographic density in midlife. Among daughters with high (>75th percentile) exposure to p,p'-Dichlorodiphenyldichloroethylene (DDE), p,p'-DDT was significantly correlated with increased dense area and percent density regardless of her body mass in midlife. In the subset of women with lower (<75th percentile) p,p-DDE, p,p'-DDT was associated with increased non-dense breast area. This was explained by adjustment for midlife BMI suggesting that p,p'-DDT may be obesogenic. In aggregate our findings indicate that early life p,p'-DDT exposure impacts breast density in a complex way that depends on the hosts biological ability to sequester and process DDT and levels of exposure.

Study Type : Human Study

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