Subacute effects of nitrogen dioxide on membrane constituents of lung, liver, and kidney of rats

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Environ. Res.; (United States)

DOI:https://doi.org/10.1016/S0013-9351(86)80180-3· OSTI ID:5115562

Takahashi, Y; Mochitate, K; Miura, T

Male Wistar rats were exposed to 0.4, 1.2, and 4.0 ppm nitrogen dioxide (NO/sub 2/) for up to 14 weeks to examine subacute effects of NO/sub 2/ on membrane constituents of lung, liver, and kidney. In the lung, cytochrome P-450 decreased to 59% and 57% of the control values after 1 and 10 weeks of exposure to 4.0 ppm NO/sub 2/, respectively, and remained at control levels at other exposure periods. The activity of succinate-cytochrome c reductase also decreased to 75% of the control values after 2, 4, and 14 weeks of exposure to 4.0 ppm NO/sub 2/, respectively. Exposures to 0.4 and 1.2 ppm NO/sub 2/ resulted in similar patterns of alterations in these enzymes. In the liver, cytochrome P-450 decreased to 72%, 70%, and 73% of the control values after 1, 5, and 8 weeks of exposure to 4.0 ppm NO/sub 2/, respectively and remained at control levels at other exposure periods. The activity of NADPH-cytochrome P-450 reductase also decreased in a fashion similar to cytochrome P-450. Exposures to 0.4 and 1.2 ppm NO/sub 2/ resulted in similar patterns of alterations in these enzymes. In addition, cytochrome b/sub 5/ showed a reduced value between 5 and 12 weeks of exposures to 1.2 and 4.0 ppm NO/sub 2/ and then recovered. In the kidney, all components of the microsomal electron-transport systems increased during 12-week exposures to 1.2 and 4.0 ppm NO/sub 2/.

• Research Organization: National Institute for Environmental Studies, Ibaraki, Japan
• OSTI ID: 5115562
• Journal Information: Environ. Res.; (United States), Journal Name: Environ. Res.; (United States) Vol. 41:1; ISSN ENVRA
• Country of Publication: United States
• Language: English

Related Subjects

560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOLOGICAL EFFECTS
BODY
CELL CONSTITUENTS
CHALCOGENIDES
CYTOCHROME OXIDASE
CYTOCHROMES
DATA
DIGESTIVE SYSTEM
DOSE-RESPONSE RELATIONSHIPS
ENZYME ACTIVITY
ENZYMES
EXPERIMENTAL DATA
GLANDS
HAEM DEHYDROGENASES
INFORMATION
INHIBITION
KIDNEYS
LIVER
LUNGS
MAMMALS
MICROSOMES
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOIDS
ORGANS
OXIDES
OXIDOREDUCTASES
OXYGEN COMPOUNDS
PIGMENTS
PROTEINS
RATS
RESPIRATORY SYSTEM
RODENTS
VERTEBRATES