Enhanced Interleukin 1 Production by Alveolar Macrophages and Increase in Ia-Positive Lung Cells in Silica-Exposed Rats
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- OGHISO Yoichi
- Division of-Comparative Radiotoxicology, National Institute of Radiological Sciences
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- KUBOTA Yoshihisa
- Division of-Comparative Radiotoxicology, National Institute of Radiological Sciences
抄録
Inhalation exposure to silica dust enhanced interleukin 1 (IL-1) production by alveolar macrophages (AM), which is attributable to an increase in Ia-positive lung cells. While the proportion of Ia-positive cells in lavaged bronchoalveolar cells (BAC) was much lower (0-3%) in unexposed control rats, about a third of the rats that inhaled silica showed higher proportions (8.0-18.5%); these were designated "Ia-high" exposed animals. The number of total cells, Ia-positive cells and lymphocytes in BAC was significantly increased (P<0.05, P<0.001, and P<0.001, respectively) in these "Ia-high" exposed animals, compared to the control animals. Adherent AM populations obtained from BAC preparations also contained significantly higher (P<0.001) proportions of Ia-positive cells in the "Ia-high" exposed animals. When these adherent AM cultures were stimulated with lipopolysaccharide, IL-1 activity of the culture supernatants was enhanced and was significantly higher (P<0.001) in the "Ia-high" exposed rats, compared to the control animals. These results indicate that silica-exposure can induce populational changes in lung cells and also activation of AM associated with the increase in Ia-positive cells.
収録刊行物
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- MICROBIOLOGY and IMMUNOLOGY
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MICROBIOLOGY and IMMUNOLOGY 30 (11), 1189-1198, 1986
Center For Academic Publications Japan
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詳細情報 詳細情報について
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- CRID
- 1572824502941183616
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- NII論文ID
- 130003483178
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- ISSN
- 03855600
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles