Pulmonary lesions in rats exposed to ozone. A correlated light and electron microscopic study

Charles Plopper, D. L. Dungworth, W. S. Tyler

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Selective embedding processes were used to identify lesions in different regions of pulmonary acini in a histologic and ultrastructural study of the effects of a 4 hr exposure to 3 ppm ozone on rat lungs. There was a gradation of epithelial damage in acini; the severest lesions were located centrally, where there was necrosis of bronchiolar epithelium and membranous pneumocytes. In peripheral acinar regions, membranous cells were normal; granular pneumonocytes were normal throughout. In contrast, lesions in capillary endothelium were more widespread. Endothelial swelling was seen in all portions of acini, but was more common centrally, and ring like formations of endothelial membranes were found peripherally. Early stages of alveolar edema were more often seen in peripheral acinar regions and were usually accompanied by interstitial edema. These results confirm that the brunt of ozone damage is borne by centriacinar regions. Further, they highlight the need to identify portions of acini being examined ultrastructurally to avoid variable and conflicting results. The apparent separation of centriacinar epithelial damage from the peripheral location of the earliest detectable edema indicates that further exploration is needed to determine to what extent different, although overlapping, sets of pathogenetic factors might be involved.

Original languageEnglish (US)
Pages (from-to)375-394
Number of pages20
JournalAmerican Journal of Pathology
Volume71
Issue number3
StatePublished - Dec 1 1973

Fingerprint

Ozone
Edema
Electrons
Light
Lung
Alveolar Epithelial Cells
Vascular Endothelium
Necrosis
Epithelium
Membranes

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

Pulmonary lesions in rats exposed to ozone. A correlated light and electron microscopic study. / Plopper, Charles; Dungworth, D. L.; Tyler, W. S.

In: American Journal of Pathology, Vol. 71, No. 3, 01.12.1973, p. 375-394.

Research output: Contribution to journalArticle

@article{00e1e53c12434c2581de1fa961d76f7a,
title = "Pulmonary lesions in rats exposed to ozone. A correlated light and electron microscopic study",
abstract = "Selective embedding processes were used to identify lesions in different regions of pulmonary acini in a histologic and ultrastructural study of the effects of a 4 hr exposure to 3 ppm ozone on rat lungs. There was a gradation of epithelial damage in acini; the severest lesions were located centrally, where there was necrosis of bronchiolar epithelium and membranous pneumocytes. In peripheral acinar regions, membranous cells were normal; granular pneumonocytes were normal throughout. In contrast, lesions in capillary endothelium were more widespread. Endothelial swelling was seen in all portions of acini, but was more common centrally, and ring like formations of endothelial membranes were found peripherally. Early stages of alveolar edema were more often seen in peripheral acinar regions and were usually accompanied by interstitial edema. These results confirm that the brunt of ozone damage is borne by centriacinar regions. Further, they highlight the need to identify portions of acini being examined ultrastructurally to avoid variable and conflicting results. The apparent separation of centriacinar epithelial damage from the peripheral location of the earliest detectable edema indicates that further exploration is needed to determine to what extent different, although overlapping, sets of pathogenetic factors might be involved.",
author = "Charles Plopper and Dungworth, {D. L.} and Tyler, {W. S.}",
year = "1973",
month = "12",
day = "1",
language = "English (US)",
volume = "71",
pages = "375--394",
journal = "American Journal of Pathology",
issn = "0002-9440",
publisher = "Elsevier Inc.",
number = "3",

}

TY - JOUR

T1 - Pulmonary lesions in rats exposed to ozone. A correlated light and electron microscopic study

AU - Plopper, Charles

AU - Dungworth, D. L.

AU - Tyler, W. S.

PY - 1973/12/1

Y1 - 1973/12/1

N2 - Selective embedding processes were used to identify lesions in different regions of pulmonary acini in a histologic and ultrastructural study of the effects of a 4 hr exposure to 3 ppm ozone on rat lungs. There was a gradation of epithelial damage in acini; the severest lesions were located centrally, where there was necrosis of bronchiolar epithelium and membranous pneumocytes. In peripheral acinar regions, membranous cells were normal; granular pneumonocytes were normal throughout. In contrast, lesions in capillary endothelium were more widespread. Endothelial swelling was seen in all portions of acini, but was more common centrally, and ring like formations of endothelial membranes were found peripherally. Early stages of alveolar edema were more often seen in peripheral acinar regions and were usually accompanied by interstitial edema. These results confirm that the brunt of ozone damage is borne by centriacinar regions. Further, they highlight the need to identify portions of acini being examined ultrastructurally to avoid variable and conflicting results. The apparent separation of centriacinar epithelial damage from the peripheral location of the earliest detectable edema indicates that further exploration is needed to determine to what extent different, although overlapping, sets of pathogenetic factors might be involved.

AB - Selective embedding processes were used to identify lesions in different regions of pulmonary acini in a histologic and ultrastructural study of the effects of a 4 hr exposure to 3 ppm ozone on rat lungs. There was a gradation of epithelial damage in acini; the severest lesions were located centrally, where there was necrosis of bronchiolar epithelium and membranous pneumocytes. In peripheral acinar regions, membranous cells were normal; granular pneumonocytes were normal throughout. In contrast, lesions in capillary endothelium were more widespread. Endothelial swelling was seen in all portions of acini, but was more common centrally, and ring like formations of endothelial membranes were found peripherally. Early stages of alveolar edema were more often seen in peripheral acinar regions and were usually accompanied by interstitial edema. These results confirm that the brunt of ozone damage is borne by centriacinar regions. Further, they highlight the need to identify portions of acini being examined ultrastructurally to avoid variable and conflicting results. The apparent separation of centriacinar epithelial damage from the peripheral location of the earliest detectable edema indicates that further exploration is needed to determine to what extent different, although overlapping, sets of pathogenetic factors might be involved.

UR - http://www.scopus.com/inward/record.url?scp=0015798932&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0015798932&partnerID=8YFLogxK

M3 - Article

VL - 71

SP - 375

EP - 394

JO - American Journal of Pathology

JF - American Journal of Pathology

SN - 0002-9440

IS - 3

ER -