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Pathology of diacetyl and 2,3-pentanedione airway lesions in a rat model of obliterative bronchiolitis.
- Source :
-
Toxicology [Toxicology] 2017 Aug 01; Vol. 388, pp. 40-47. Date of Electronic Publication: 2016 Oct 29. - Publication Year :
- 2017
-
Abstract
- Inhalation of diacetyl vapors by workers has been associated with obliterative bronchiolitis (OB), a poorly understood fibroproliferative disease of the small airways. Significant insights into the pathogenesis of OB have been obtained through the use of a rat model. Inhalation exposure of rats to diacetyl or 2,3-pentanedione, a related flavoring agent, can cause severe injury to the airway epithelium and underlying basement membrane. Repeated exposure to diacetyl or 2,3-pentanedione leads to aberrant repair, fibroproliferation and partial to complete occlusion of the airway lumen. Fibroproliferative lesions in rat airways were found to include both intraluminal polyps and circumferential intramural lesions. Intraluminal polyps have been observed to form secondary attachments spanning the airway lumen causing increasing obstruction. These airway lesions in rats are accompanied by inflammation in the form of peribronchial and perivascular infiltrates of lymphocytes, eosinophils and neutrophils. Diacetyl-induced OB lesions in the rat are similar to OB lesions in humans and provide a good model for studying the pathogenesis of this disease.<br /> (Published by Elsevier B.V.)
- Subjects :
- Animals
Basement Membrane drug effects
Basement Membrane pathology
Bronchiolitis Obliterans pathology
Diacetyl administration & dosage
Disease Models, Animal
Flavoring Agents administration & dosage
Humans
Male
Occupational Exposure adverse effects
Pentanones administration & dosage
Rats
Rats, Wistar
Respiratory Mucosa drug effects
Respiratory Mucosa pathology
Species Specificity
Bronchiolitis Obliterans chemically induced
Diacetyl toxicity
Flavoring Agents toxicity
Inhalation Exposure adverse effects
Pentanones toxicity
Subjects
Details
- Language :
- English
- ISSN :
- 1879-3185
- Volume :
- 388
- Database :
- MEDLINE
- Journal :
- Toxicology
- Publication Type :
- Academic Journal
- Accession number :
- 27984136
- Full Text :
- https://doi.org/10.1016/j.tox.2016.10.013