UTSW genetic study confirms sarin nerve gas as cause of Gulf War illness

DALLAS – May 11, 2022 – For three decades, scientists have debated the underlying cause of Gulf War illness (GWI), a collection of unexplained and chronic symptoms affecting veterans of the Persian Gulf War. Now researchers led by Robert Haley, M.D., Professor of Internal Medicine and Director of the Division of Epidemiology at UT Southwestern, have solved the mystery, showing through a detailed genetic study that the nerve gas sarin was largely responsible for the syndrome. The findings were published in Environmental Health Perspectives, a peer-reviewed journal supported by the National Institute of Environmental Health Sciences, with an accompanying editorial on the paper by leading environmental epidemiologists.

Dr. Haley’s research group not only discovered that veterans with exposure to sarin were more likely to develop GWI, but also found that the risk was modulated by a gene that normally allows some people’s bodies to better break down the nerve gas. Gulf War veterans with a weak variant of the gene who were exposed to sarin were more likely to develop symptoms of GWI than other exposed veterans who had the strong form of the gene.

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