Robot System to Test 10,000 Chemicals for Toxicity

Several federal agencies, including the National Institutes of Health, recently unveiled a new high-speed robot screening system that will test 10,000 different chemicals for potential toxicity. The system marks the beginning of a new phase of an ongoing collaboration, referred to as Tox21, that is working to protect human health by improving how chemicals are tested in the United States.

The robot system, which is located at the NIH Chemical Genomics Center (NCGC) in Rockville, Md., was purchased as part of the Tox21 collaboration. Tox21 was established in 2008 between the National Institute of Environmental Health Sciences National Toxicology Program (NTP), the National Human Genome Research Institute (NHGRI), and the Environmental Protection Agency (EPA), with the addition of the Food and Drug Administration (FDA) in 2010. Tox21 merges existing agency resources (research, funding, and testing tools) to develop ways to more effectively predict how chemicals will affect human health and the environment.

The 10,000 chemicals screened by the robot system include compounds found in industrial and consumer products, food additives, and drugs. A thorough analysis and prioritization process from more than 200 public databases of chemicals and drugs used in the United States and abroad was conducted to select the initial 10,000 chemicals for testing. Testing results will provide information useful for evaluating if these chemicals have the potential to disrupt human body processes enough to lead to adverse health effects.

"Tox21 has used robots to screen chemicals since 2008, but this new robotic system is dedicated to screening a much larger compound library," said NHGRI Director Eric Green, M.D., Ph.D.

NCGC director at NHGRI, Christopher Austin, M.D., added "The Tox21 collaboration will transform our understanding of toxicology with the ability to test in a day what would take one year for a person to do by hand."

Tox21 has already screened more than 2,500 chemicals for potential toxicity, using robots and other innovative chemical screening technologies.

"The addition of this new robot system will allow the National Toxicology Program to advance its mission of testing chemicals smarter, better, and faster," said Linda Birnbaum, Ph.D., NIEHS and NTP director. "We will be able to more quickly provide information about potentially dangerous substances to health and regulatory decision makers, and others, so they can make informed decisions to protect public health."

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