Skip Navigation
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Internet Explorer is no longer a supported browser.

This website may not display properly with Internet Explorer. For the best experience, please use a more recent browser such as the latest versions of Google Chrome, Microsoft Edge, and/or Mozilla Firefox. Thank you.

Your Environment. Your Health.


Export to Word (
Principal Investigator: Arora, Manish
Institute Receiving Award Icahn School Of Medicine At Mount Sinai
Location New York, NY
Grant Number R01ES026033
Funding Organization National Institute of Environmental Health Sciences
Award Funding Period 01 Sep 2016 to 31 Aug 2021
DESCRIPTION (provided by applicant):  : Neurodevelopment and cognitive function are among the most important outcomes in public health, particularly with the rise of knowledge-based economies. While it is widely believed that the simultaneous presence of several toxic exposures can alter developmental trajectories of the central nervous system, studies designed to address mixed chemical exposures are rare, and represent a critical need in the field of public health. Multiple barriers are inherent to conducting mixtures research and must be overcome if this field is to progress. Obvious barriers include the need for large sample sizes and prospective data to assess exposure timing (i.e. critical developmental windows). Two additional barriers include exposure misclassification and lack of statistical approaches available for higher dimensional interactions. Our proposal addresses all of these barriers directly and will establish a framework for the study of chemical mixtures that can be applied broadly in environmental health. We have developed a novel biomarker that can objectively reconstruct the dose and timing of past chemical exposure using deciduous teeth. This biomarker differs from standard tooth biomarkers as it combines sophisticated histological and chemical analyses to precisely sample dentine layers corresponding to specific life stages, generating integrated, longitudinal weekly exposure estimates in the second and third trimesters and during early childhood. Our proposal will address mixed metal exposure, as a first step. We note, however, that our approach can and will be applied to organic chemicals in the future, and we are in parallel developing methods for their analysis in teeth. On another front, we will also apply cutting-edge statistical machine learning methods. In this study, we will focus on five metals/metalloids that are of public health significance, manganese (Mn), lead (Pb), arsenic (As), zinc (Zn) and cadmium (Cd). We will conduct this study in the Early Life Exposures in MExico and NeuroToxicology (ELEMENT), a prospective birth cohort using advanced methods in social science, genetics and toxicology to assess transdisciplinary risk factors impacting neurodevelopment.
Science Code(s)/Area of Science(s) Primary: 61 - Neurodevelopmental
Publications See publications associated with this Grant.
Program Officer Kimberly Gray
to Top