High burden of clonal hematopoiesis in first responders exposed to the World Trade Center disaster. Academic Article uri icon

Overview

abstract

  • The terrorist attacks on the World Trade Center (WTC) created an unprecedented environmental exposure to aerosolized dust, gases and potential carcinogens. Clonal hematopoiesis (CH) is defined as the acquisition of somatic mutations in blood cells and is associated with smoking and exposure to genotoxic stimuli. Here we show that deep targeted sequencing of blood samples identified a significantly higher proportion of WTC-exposed first responders with CH (10%; 48 out of 481) when compared with non-WTC-exposed firefighters (6.7%; 17 out of 255; odds ratio, 3.14; 95% confidence interval, 1.64-6.03; Pā€‰=ā€‰0.0006) after controlling for age, sex and race/ethnicity. The frequency of somatic mutations in WTC-exposed first responders showed an age-related increase and predominantly affected DNMT3A, TET2 and other CH-associated genes. Exposure of lymphoblastoid cells to WTC particulate matter led to dysregulation of DNA replication at common fragile sites in vitro. Moreover, mice treated with WTC particulate matter developed an increased burden of mutations in hematopoietic stem and progenitor cell compartments. In summary, the high burden of CH in WTC-exposed first responders provides a rationale for enhanced screening and preventative efforts in this population.

authors

publication date

  • March 7, 2022

Research

keywords

  • Disasters
  • Emergency Responders
  • September 11 Terrorist Attacks

Identity

Scopus Document Identifier

  • 85125724413

Digital Object Identifier (DOI)

  • 10.1038/s41591-022-01708-3

PubMed ID

  • 35256801

Additional Document Info

volume

  • 28

issue

  • 3