Effects of ozone on the defense to a respiratory Listeria monocytogenes infection in the rat. Suppression of macrophage function and cellular immunity and aggravation of histopathology in lung and liver during infection

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Toxicol. Appl. Pharmacol.; (United States)

DOI:https://doi.org/10.1016/0041-008X(88)90279-7· OSTI ID:6922338

Van Loveren, H; Rombout, P J; Wagenaar, S S; Walvoort, H C; Vos, J G

We have investigated the effect of exposure to ozone on defense mechanisms to a respiratory infection with Listeria monocytogenes in the rat. For this purpose rats were continuously exposed to O/sub 3/ concentrations ranging from 0.25 to 2.0 mg/m3 for a period of 1 week. In this model defense to a respiratory infection with Listeria depends on acquired specific cellular immune responses, as well as on natural nonspecific defense mechanisms. The results confirm earlier findings that show that ozone exposure can suppress the capacity of macrophages to ingest and kill Listeria. Moreover, the results show that ozone can also have a suppressive effect on the development of cellular immune responses to a respiratory Listeria infection, i.e., on T/B ratios in lung draining lymph nodes, delayed-type hypersensitivity responses to Listeria antigen, and lymphoproliferative responses in spleen and lung draining lymph nodes to Listeria antigen. The effects on the specific immune responses are especially overt if exposure to the oxidant gas occurs during an ongoing primary infection. The pathological lesions induced by a pulmonary Listeria monocytogenes infection were characterized by multifocal infiltrates of histiocytic and lymphoid cells. The foci sometimes had a granulomatous appearance. Moreover, the cellularity of the interstitial tissues was increased. In the lung many diffuse alveolar macrophages could be seen in the alveoli. Ozone exposure greatly increased the severity of the lung lesions and also of liver lesions resulting from the pulmonary infection. A prominent finding was the formation of granulomas in ozone-exposed and Listeria-infected rats.

• Research Organization: National Institute of Public Health and Environmental Protection, Bilthoven (Netherlands)
• OSTI ID: 6922338
• Journal Information: Toxicol. Appl. Pharmacol.; (United States), Vol. 94:3
• Country of Publication: United States
• Language: English

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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BACTERIA
INFECTIVITY
LIVER
PATHOLOGICAL CHANGES
LUNGS
LYMPHOCYTES
CELL PROLIFERATION
MACROPHAGES
BIOLOGICAL FUNCTIONS
OZONE
BIOLOGICAL EFFECTS
BACTERIAL DISEASES
IMMUNE REACTIONS
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LYMPH NODES
PHAGOCYTOSIS
RATS
RESPIRATORY SYSTEM DISEASES
ANIMAL CELLS
ANIMALS
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
CONNECTIVE TISSUE CELLS
DIGESTIVE SYSTEM
DISEASES
FUNCTIONS
GLANDS
INFECTIOUS DISEASES
LEUKOCYTES
LYMPHATIC SYSTEM
MAMMALS
MATERIALS
MICROORGANISMS
ORGANS
PHAGOCYTES
RESPIRATORY SYSTEM
RODENTS
SOMATIC CELLS
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560300* - Chemicals Metabolism & Toxicology