Chai R, Xie H, Zhang J, Ma Z. Sulfur dioxide exposure reduces the quantity of CD19
+ cells and causes nasal epithelial injury in rats.
J Occup Med Toxicol 2018;
13:22. [PMID:
30065773 PMCID:
PMC6062972 DOI:
10.1186/s12995-018-0205-x]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 07/18/2018] [Indexed: 11/10/2022] Open
Abstract
Background
Reactive airway dysfunction syndrome (RADS), also called irritant-induced asthma, is a type of occupational asthma that can occur within a very short period of latency. The study sought to investigate the influence of sulfur dioxide (SO2) exposure on CD19+ cells and nasal epithelial injury.
Methods
We investigated the effects of SO2 on CD19 expression and morphological changes of nasal epithelia in rats. In the study, 20 rats were randomly divided into the SO2 exposure group that were exposed to 600 ppm SO2, 2 h/day for consecutive 7 days, and the control group that were exposed to filtered air).
Results
Inhalation of high concentration of SO2significantly reduced CD19 expression at both the mRNA transcript and protein levels, and reduced the percentages of CD19+ cells and CD19+/CD23+ cells in the nasal septum. However, inhalation of high concentration of SO2 did not affect immunoglobulin (Ig) G, IgA and IgE levels in the serum and nasal septum. More importantly, SO2 exposure also caused mild structural changes of the nasal septum.
Conclusion
Our results reveal that inhalation of a high concentration of SO2 reduces CD19 expression and causes structural change of the nasal septum in rats.
Collapse