Impact on rats from acute intratracheal inhalation exposures to WTC dusts.

Details

• Personal Author:
  Chen L-C ; Cohen MD ; Horton L ; Lee H-W ; Park S-H ; Prophete C ; Sisco M ; Zelikoff J
• Description:
  Background: Studies have revealed the increased incidence of health disorders in First Responders (FR) who were at Ground Zero over the initial 72 hr after the World Trade Center (WTC) collapses. Previous studies in rats exposed to WTC dusts using exposure scenarios that mimicked FR mouthbreathing showed exposure led to altered expression of genes whose products could be involved in lung ailments. Nevertheless, it was uncertain if repeated exposures (as occurred in earliest days post-disaster) might have given rise to long-term changes in the lungs/other organs, in white blood cell (WBC) profiles, and/or systemic expression of select (mostly immune-related) proteins. Methods: To examine this, rats were exposed on 2 consecutive days (2 hr/d, intratracheal inhalation) to WTC dusts and then examined over a 1-yr period thereafter. At select times post-exposure, organ (lung, heart, liver, kidney, spleen) weights, WBC profiles, and blood levels of a variety of proteins were evaluated. Results: The study showed that over the 1-yr period, there were nominal effects on organ weights (absolute, index) as a result of the dust exposures. There were significant changes (relative to in naïve rats) in WBC profiles, with exposed rats having increased monocyte-macrophage and decreased lymphocyte percentages. The study also found that dust exposure led to significant systemic increases in many proteins, including MCP-1, RANTES, MMP-9, RAGE, and Galectin-3. Conclusions: These results provide further support for our longstanding hypothesis that the WTC dusts could potentially have acted as direct inducers of many of the health effects that have been seen in the exposed FR. [Description provided by NIOSH]
• Subjects:
  Animals Dust Emergency Responders Immune System Occupational Health Safety September 11 Terrorist Attacks
• Keywords:
  Author Keywords: WTC; World Trade Center; Dust; Heart; Lung; Spleen; Liver; Kidney; Serum World Trade Center; WTC; First Responders; Disaster Response; Gene Expression; Immune Reaction; Animal Studies; Dust Exposure; Dusts; Proteins; Health Effects;
• ISSN:
  0895-8378
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New York ; OSHA Region 2
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  218-230
• Volume:
  32
• Issue:
  5
• NIOSHTIC Number:
  nn:20065138
• Citation:
  Inhal Toxicol 2020 Apr; 32(5):218-230
• Contact Point Address:
  Mitchell D. Cohen, Department of Environmental Medicine, New York University of School of Medicine, 341 East 25th Street, 301D, New York, NY 10010, USA
• Email:
  SungHyun.Park@nyulangone.org
• Federal Fiscal Year:
  2020
• Performing Organization:
  New York University School of Medicine
• Peer Reviewed:
  True
• Start Date:
  20090701
• Source Full Name:
  Inhalation Toxicology
• End Date:
  20140630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:572f53d9692fbf74b2cfb90100d1285e667eec5c07f17f45713f4176ab7a728eb0066d2aaa2ab96af3e8b0c50b4e6005c2f40b725a23c77332b47116871d35aa
• Download URL:
  https://stacks.cdc.gov/view/cdc/249347/cdc_249347_DS1.pdf
• File Type:
  [PDF - 2.60 MB ]