Mast cells modulate acute ozone-induced inflammation of the murine lung

Journal Article · Mon Nov 01 04:00:00 EST 1993 · American Review of Respiratory Disease; (United States)

DOI:https://doi.org/10.1164/ajrccm/148.5.1284· OSTI ID:5708733

Kleeberger, S R; Seiden, J E; Levitt, R C; Zhang, L Y ^[1]

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1. Johns Hopkins School of Public Health, Baltimore, MD (United States)

We hypothesized that mast cells modulate lung inflammation that develops after acute ozone (O3) exposure. Two tests were done: (1) genetically mast-cell-deficient (WBB6F1-W/Wv, WCB6F1-SI/SId) and bone-marrow-transplanted W/Wv mice were exposed to O3 or filtered air, and the inflammatory responses were compared with those of mast-cell-sufficient congenic mice (WBB6F1-(+)/+, WCB6F1-(+)/+); (2) genetically O3-susceptible C57BL/6J mice were treated pharmacologically with putative mast-cell modulators or vehicle, and the O3-induced inflammatory responses were compared. Mice were exposed to 1.75 ppm O3 or air for 3 h, and lung inflammation was assessed by bronchoalveolar lavage (BAL) 6 and 24 h after exposure. Relative to O3-exposed W/Wv and SI/SId mice, the mean numbers of lavageable polymorphonuclear leukocytes (PMNs) and total BAL protein concentration (a marker of permeability) were significantly greater in the respective O3-exposed normal congenic +/+ mice (p < 0.05). Mast cells were reconstituted in W/Wv mice by transplantation of bone marrow cells from congenic +/+ mice, and O3-induced lung inflammation was assessed in the mast-cell-replete W/Wv mice. After O3 exposure, the changes in lavageable PMNs and total protein of mast-cell-replete W/Wv mice were not different from age-matched normal +/+ control mice, and they were significantly greater than those of sham-transplanted W/Wv mice (p < 0.05). Genetically susceptible C57BL/6J mice were pretreated with a mast-cell stabilizer (nedocromil sodium), secretagogue (compound 48/80), or vehicle, and the mice were exposed to O3.

• OSTI ID: 5708733
• Journal Information: American Review of Respiratory Disease; (United States), Journal Name: American Review of Respiratory Disease; (United States) Vol. 148:5; ISSN ARDSBL; ISSN 0003-0805
• Country of Publication: United States
• Language: English

Related Subjects

550200 -- Biochemistry
560300* -- Chemicals Metabolism &amp; Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACUTE EXPOSURE
ANIMAL CELLS
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
BONE MARROW CELLS
COMPARATIVE EVALUATIONS
CONNECTIVE TISSUE CELLS
DISEASES
EVALUATION
INFLAMMATION
LEUKOCYTES
LUNGS
MAMMALS
MAST CELLS
MATERIALS
MICE
NEUTROPHILS
ORGANIC COMPOUNDS
ORGANS
OZONE
PATHOLOGICAL CHANGES
PNEUMONIA
PROTEINS
RESPIRATORY SYSTEM
RESPIRATORY SYSTEM DISEASES
RESPONSE MODIFYING FACTORS
RODENTS
SOMATIC CELLS
SYMPTOMS
VERTEBRATES