Relative permeability of nasal, tracheal, and bronchoalveolar mucosa to macromolecules in rats exposed to ozone

Journal Article · Wed Jan 01 00:00:00 EST 1986 · J. Toxicol. Environ. Health; (United States)

DOI:https://doi.org/10.1080/15287398609530822· OSTI ID:5683101

Bhalla, D K; Mannix, R C; Kleinman, M T; Crocker, T T

Nasal, tracheal and bronchoalveolar injuries resulting from acute ozone exposure of rats were investigated by permeability changes. /sup 99m/Tc-labeled diethylenetriaminepentaacetate (DPTA) and /sup 125/I-labeled bovine serum albumin (BSA) were selectively instilled into localized airway regions of anesthetized rats exposed to 0.8 ppm O/sub 3/ or clean air for 2 h. Transmucosal transfer of the radiolabeled tracers was detected by counting the radioactivity in blood samples collected at short postinstillation time intervals. Permeability measurements were made on d 0, 1, and 2 after O/sub 3/ exposure to analyze the extent and persistence of tissue injury in the nasal, tracheal, and bronchoalveolar regions. Normal mucosal permeability was low in nose, intermediate in bronchoalveolar zone, and high in trachea. The O/sub 3/-related injury, reflected by elevated permeability, was substantial in the trachea and bronchoalveolar zone but was minimal in the nose immediately after the exposure. Abnormal permeability persisted for less than 24 h in the trachea but for more than 24 h in the bronchoalveolar zone. The results are consistent with the properties of O/sub 3/ of causing greater injury in the smaller airways and the alveolar zone than in the trachea.

• Research Organization: Univ. of California, Irvine
• OSTI ID: 5683101
• Journal Information: J. Toxicol. Environ. Health; (United States), Vol. 17:2-3
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
MUCOUS MEMBRANES
INJURIES
PERMEABILITY
OZONE
TOXICITY
ALBUMINS
IODINE 125
ISOMERIC NUCLEI
LUNGS
RATS
TECHNETIUM 99
TIME DEPENDENCE
TRACER TECHNIQUES
TRACHEA
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MEMBRANES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PROTEINS
RADIOISOTOPES
RESPIRATORY SYSTEM
RODENTS
TECHNETIUM ISOTOPES
VERTEBRATES
YEARS LIVING RADIOISOTOPES
560305* - Chemicals Metabolism & Toxicology- Vertebrates- (-1987)
550901 - Pathology- Tracer Techniques