EPA Science Inventory

Multivariate analysis of toxicity experimental results of environmental endpoints. (FutureToxII)

Citation:

Mansouri, K., M. Martin, AND R. Judson. Multivariate analysis of toxicity experimental results of environmental endpoints. (FutureToxII). Presented at FutureTox II, Chapel Hill, NC, January 16 - 17, 2014.

Description:

The toxicity of hundreds of chemicals have been assessed in laboratory animal studies through EPA chemical regulation and toxicological research. Currently, over 5000 laboratory animal toxicity studies have been collected in the Toxicity Reference Database (ToxRefDB). In addition, the ToxCast research program released over 800 high-throughput screening (HTS) bioassays for over 1800 chemicals across 3 multi-year phases. In order to optimize the use of these $ billions worth in-vivo and $ millions worth in-vitro studies in the toxicity assessment of chemicals, a more understanding of the information encoded in these databases is needed. In this work, different multivariate analysis techniques were employed in the learning process about the relationships between the different layers of information represented by the chemicals, the bioassays and the biological targets. The results provided by these methods; Principal Component Analysis (PCA) Kohonen-Networks Self Organising Maps (SOM) and Spanning trees were interpreted and used to map the linkage between chemical structures and biological activity. This analysis aims to better understand the relationship between chemical structure, bioactivity and in vivo response. This abstract does not necessarily reflect U.S. EPA policy.

Purpose/Objective:

In this work, different multivariate analysis techniques were employed in the learning process about the relationships between the different layers of information represented by the chemicals, the bioassays and the biological targets.

URLs/Downloads:

K_MANSOURI FUTURETOXII POSTER.PDF   (PDF,NA pp, 689.152 KB,  about PDF)

MANSOURI_ABSTRACT_FUTURETOXII.PDF   (PDF,NA pp, 81.335 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PRESENTATION/POSTER)
Start Date: 01/17/2014
Completion Date: 01/17/2014
Record Last Revised: 08/22/2014
Record Created: 08/22/2014
Record Released: 08/22/2014
OMB Category: Other
Record ID: 284566

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL CENTER FOR COMPUTATIONAL TOXICOLOGY