Predicting later-life outcomes of early-life exposures
- PMID: 22672778
- PMCID: PMC3491941
- DOI: 10.1289/ehp.1204934
Predicting later-life outcomes of early-life exposures
Abstract
Background: In utero exposure of the fetus to a stressor can lead to disease in later life. Epigenetic mechanisms are likely mediators of later-life expression of early-life events.
Objectives: We examined the current state of understanding of later-life diseases resulting from early-life exposures in order to identify in utero and postnatal indicators of later-life diseases, develop an agenda for future research, and consider the risk assessment implications of this emerging knowledge.
Methods: This review was developed based on our participation in a National Research Council workshop titled "Use of in Utero and Postnatal Indicators to Predict Health Outcomes Later in Life: State of the Science and Research Recommendations." We used a case study approach to highlight the later-life consequences of early-life malnutrition and arsenic exposure.
Discussion: The environmental sensitivity of the epigenome is viewed as an adaptive mechanism by which the developing organism adjusts its metabolic and homeostatic systems to suit the anticipated extrauterine environment. Inappropriate adaptation may produce a mismatch resulting in subsequent increased susceptibility to disease. A nutritional mismatch between the prenatal and postnatal environments, or early-life obesogen exposure, may explain at least some of the recent rapid increases in the rates of obesity, type 2 diabetes, and cardiovascular diseases. Early-life arsenic exposure is also associated with later-life diseases, including cardiovascular disease and cancer.
Conclusions: With mounting evidence connecting early-life exposures and later-life disease, new strategies are needed to incorporate this emerging knowledge into health protective practices.
Conflict of interest statement
This document has been reviewed by the National Health and Environmental Effects Research Laboratory, U.S. EPA, and approved for publication. Approval does not signify that the contents reflect the views of the agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.
R.E.C. is employed by Pfizer Global Research and Development, Groton, CT. B.B. holds several patents related to nuclear receptor sequence and function that have been licensed to for-profìt entities and generate annual royalty payments. K.B. occasionally acts as an expert consultant for chemical and pharmaceutical companies. The other authors declare they have no actual or potential competing financial interests.
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Comment in
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Asking the right questions: how early-life exposures influence later development of disease.Environ Health Perspect. 2012 Oct;120(10):a403. doi: 10.1289/ehp.120-a403a. Environ Health Perspect. 2012. PMID: 23026485 Free PMC article. No abstract available.
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