NIOSHTIC-2 Publications Search

Advanced Search   Search Help   About NIOSHTIC-2    Feedback

Neutrophilic respiratory tract inflammation and peripheral blood neutrophilia after grain sorghum dust extract challenge.

Authors
Von Essen-SG; O'Neill-DP; McGranaghan-S; Olenchock-SA; Rennard-SI
Source
Chest 1995 Nov; 108(5):1425-1433
Link
http://dx.doi.org/10.1378/chest.108.5.1425
NIOSHTIC No.
00230125
Abstract
The acute effects of grain dust inhalation were investigated in 30 normal volunteers. Subjects were exposed to 24 milliliters of a filter sterilized grain sorghum dust extract (GSDE) or a control solution by inhalation. Some subjects received 20 milligrams of prednisone, three times a day for 2 days before the GSDE inhalation challenge. Spirometry and carbon-monoxide diffusing capacity (Dco) were performed at up to 11 hours after challenge. At 24 hours after challenge, bronchoscopy, bronchoalveolar lavage (BAL) and nasal lavage were performed. Peripheral blood neutrophil chemotaxis was measured up to 24 hours after challenge. GSDE inhalation produced visible evidence of inflammation in the respiratory tract. Increased numbers of neutrophils were recovered by BAL. Peripheral blood neutrophils were increased in number and displayed increased chemotaxis. Prednisone treatment partially blocked these effects but did not affect the number of neutrophils in the lower respiratory tract. Significant decreases in pulmonary function test values were seen at 30 minutes after challenge. Subjects exposed to GSDE reported more symptoms than those in the control solution group. The authors conclude that GSDE challenge causes respiratory tract inflammation and peripheral blood neutrophilia.
Keywords
NIOSH-Author; Pulmonary-function-tests; Grain-dusts; Humans; Blood-cells; Inhalation-studies; Respiratory-system-disorders; Nasal-cavity; Author Keywords: bronchitis; bronchoalveolar lavage; grain dust; inhalation challenge; nasal lavage; neutrophils
Contact
Dr. Von Essen, Pulmonary and Critical Care Medicine Section, University of Nebraska Medical Center, 600 South 42nd Street; Omaha, NE 68198-5300
CODEN
CHETBF
Publication Date
19951101
Document Type
Journal Article
Fiscal Year
1996
Issue of Publication
5
ISSN
0012-3692
NIOSH Division
DRDS
Source Name
Chest
State
NE; WV
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division