Study Links Toxic 9/11 Dust Exposure to Blood Cancers and Genetic Changes

A comprehensive study conducted by researchers at the Montefiore Einstein Comprehensive Cancer Center (MECCC) highlights a significant connection between toxic dust exposure during the 9/11 World Trade Center (WTC) disaster and increased risks of blood cancers, such as leukemia. The research suggests that first responders who inhaled the hazardous particulate matter from the collapsing towers developed specific genetic mutations in their blood-forming cells. These mutations, associated with a condition called clonal hematopoiesis (CH), are typically age-related but were found at elevated levels in exposed individuals, particularly among those under age 60.

CH is a precancerous state where blood stem cells harbor the same gene mutations, leading to increased inflammation and a higher likelihood of developing blood cancers. The study involved sequencing blood samples from nearly 1,000 WTC first responders, along with control groups of firefighters who were not at the site and unexposed individuals from the general population. Responders exposed to the toxic dust exhibited a nearly sixfold increase in the risk of developing leukemia if they had high levels of these genetic mutations.

Experimental studies in mice reinforced these findings, showing that WTC dust induces inflammation via a protein called IL1RAP, which promotes the growth of mutant blood cells. Interestingly, scientists discovered that knocking out the gene for IL1RAP in mice prevented the expansion of defective clones, pointing to a potential target for preventive therapies.

The research indicates that environmental toxins can accelerate biological aging and contribute to cancer development by promoting genetic mutations and inflammation. These findings underscore the importance of screening toxin-exposed populations for early signs of clonal hematopoiesis and exploring targeted treatments, such as IL1RAP inhibitors, to reduce cancer risk. The study broadens our understanding of how environmental disasters can have long-term health effects, informing strategies for prevention and intervention in affected communities.

Source: https://medicalxpress.com/news/2025-09-toxic-exposures-blood-cancers.html