Developmental reprogramming is an important mechanism by which early life exposures to environmental agents increase susceptibility to adult disease. For xenoestrogens such as BPA, additional research is required to understand how specific estrogen receptor (ER) subtypes and genomic vs. nongenomic signaling mediate this developmental reprogramming. Xenoestrogens can act as agonists or antagonists in different tissues, also pointing to the need for a better understanding of how specific ER coregulators (CoR) influence their activity. Finally, additional research is needed to identify the epigenetic effects of reprogramming that persist into adulthood and underlie adult disease, including prostate cancer (PCa). This Grand Opportunity (GO) grant addresses these research needs with an integrated, mechanistic assessment of how BPA induces developmental reprogramming to increase susceptibility to prostate carcinogenesis.
The Specific Aims are 1) Global analysis of the BPA epigenome to define changes associated with developmental reprogramming and increased PCa risk and 2) Define the role of specific ER subtypes and CoRs as determinants of BPA activity. This project is appropriate for a GO grant: it is large;multi-investigator, multi-institutional, multi-disciplinary;will address a specific research need and make a significant research impact in 2 years. The research team is uniquely poised to accomplish the objectives, the project is ready to implement now, utilizes innovative technologies, and the results will advance the NIH mission to improve health and prevent disease. Neonates exposed to BPA during prostate development will be followed into adulthood to quantitate BPA-associated prostate lesions and susceptibility to develop lesions will be correlated with BPA induced changes in the prostate epigenome. These studies will fill specific data gaps in the BPA literature with oral exposures, internal measurements of dose and dose-response data for relevant disease endpoints (PIN and carcinoma). The in vivo studies will be informed by in vitro, multi-parametric mechanistic studies to elucidate how specific ERs (?, or ? homo- and ?/? hetero-dimers), nongenomic signaling and the p160 class CoRs (SRC-1, -2, -3) determine the effects of BPA in prostate epithelial cells. The prevalence of PCa is increasing world-wide with 1 in 6 men in the US currently at risk for developing this disease. There is a tremendous need to understand the early origins of PCa to determine if additional public health measures are necessary to prevent exposure to BPA, or other xenoestrogens, during critical windows of development. This highly novel, scientifically vigorous, multidisciplinary approach to model the developmental effects of BPA on the prostate will set new standards for weight-of-evidence assessment of the toxicology of BPA and other endocrine disruptors, and will significantly advance research in the fields of gene-environment interaction, non-Darwinian disease susceptibility and hormone receptor action.

Public Health Relevance

The broad question we wish to address in this proposal is how environmentally relevant low doses of BPA induce a long-lasting chromatin state via epigenetic reprogramming to increase the susceptibility to prostate carcinogenesis in adult life. The identification of a developmentally reprogrammable BPA-epigenome associated with prostate carcinogenesis and its dynamic changes throughout life will open opportunities to identify exposed and at-risk populations, which is the first step toward prostate cancer prevention. More importantly, the studies proposed in this application will provide the new and critical mechanistic data on the mechanism of action of BPA to assist agencies in setting regulatory guidelines for the safe use of BPA.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
High Impact Research and Research Infrastructure Programs (RC2)
Project #
5RC2ES018789-02
Application #
7937938
Study Section
Special Emphasis Panel (ZES1-LWJ-J (O1))
Program Officer
Heindel, Jerrold
Project Start
2009-09-24
Project End
2011-08-31
Budget Start
2010-08-15
Budget End
2011-08-31
Support Year
2
Fiscal Year
2010
Total Cost
$725,548
Indirect Cost
Name
University of Texas MD Anderson Cancer Center
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
800772139
City
Houston
State
TX
Country
United States
Zip Code
77030
Ho, Shuk-Mei; Cheong, Ana; Adgent, Margaret A et al. (2017) Environmental factors, epigenetics, and developmental origin of reproductive disorders. Reprod Toxicol 68:85-104
Walker, Cheryl Lyn (2016) Minireview: Epigenomic Plasticity and Vulnerability to EDC Exposures. Mol Endocrinol 30:848-55
Treviño, Lindsey S; Bolt, Michael J; Grimm, Sandra L et al. (2016) Differential Regulation of Progesterone Receptor-Mediated Transcription by CDK2 and DNA-PK. Mol Endocrinol 30:158-72
Park, In Young; Powell, Reid T; Tripathi, Durga Nand et al. (2016) Dual Chromatin and Cytoskeletal Remodeling by SETD2. Cell 166:950-962
Wang, Quan; Trevino, Lindsey S; Wong, Rebecca Lee Yean et al. (2016) Reprogramming of the Epigenome by MLL1 Links Early-Life Environmental Exposures to Prostate Cancer Risk. Mol Endocrinol 30:856-71
Lam, Hung-Ming; Ho, Shuk-Mei; Chen, Jing et al. (2016) Bisphenol A Disrupts HNF4?-Regulated Gene Networks Linking to Prostate Preneoplasia and Immune Disruption in Noble Rats. Endocrinology 157:207-19
Cheong, Ana; Zhang, Xiang; Cheung, Yuk-Yin et al. (2016) DNA methylome changes by estradiol benzoate and bisphenol A links early-life environmental exposures to prostate cancer risk. Epigenetics 11:674-689
Bolt, M J; Stossi, F; Callison, A M et al. (2015) Systems level-based RNAi screening by high content analysis identifies UBR5 as a regulator of estrogen receptor-? protein levels and activity. Oncogene 34:154-64
Hartig, Sean M; Bader, David A; Abadie, Kathleen V et al. (2015) Ubc9 Impairs Activation of the Brown Fat Energy Metabolism Program in Human White Adipocytes. Mol Endocrinol 29:1320-33
Treviño, Lindsey S; Wang, Quan; Walker, Cheryl L (2015) Phosphorylation of epigenetic ""readers, writers and erasers"": Implications for developmental reprogramming and the epigenetic basis for health and disease. Prog Biophys Mol Biol 118:8-13

Showing the most recent 10 out of 32 publications