Pathological Examination of Lung Tissues in Influenza A Virus-Infected Mice
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- Muto Nilton Akio
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University
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- Sunden Yuji
- Laboratory of Comparative Pathology, Graduate School of Veterinary Medicine, Hokkaido University
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- Hattori Tomoe
- Division of Bioresource, Research Center for Zoonosis Control, Hokkaido University Graduate School of Life Science, Hokkaido University
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- Fujikura Daisuke
- Division of Infection and Immunity, Research Center for Zoonosis Control, Hokkaido University
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- Nakayama Yosuke
- Institute for Genetic Medicine, Hokkaido University
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- Miyazaki Tadaaki
- Institute for Genetic Medicine, Hokkaido University Global COE Program, Hokkaido University, Research Center for Zoonosis Control
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- Maruyama Mitsuo
- National Center for Geriatrics and Gerontology
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- Kimura Takashi
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University
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- Sawa Hirofumi
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University Global COE Program, Hokkaido University, Research Center for Zoonosis Control
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抄録
This study examined pathological changes in the lung tissues of young and aged mice infected with influenza virus. Young mice inoculated with influenza virus showed body weight loss at 4 days post-infection (dpi), meanwhile body weight decrease started from 9 dpi in the aged mice. We histopathologically examined the lungs of these mice. Immunohistochemical examination revealed that viral antigen-positive bronchiolar and alveolar epithelial cell numbers at 3 dpi were significantly higher in young mice than in the aged ones. Further, viral antigen-positive cells were observed at 9 dpi in the aged mice, but not in the young ones. Diffuse and severe bronchointerstitial pneumonia characterized by the accumulation of polymorphonuclear leukocytes (PMNs) was observed in young mice at 6 dpi. Histopathological changes in the aged mice were milder than those in the young mice. Moreover, T cell and macrophage accumulation in the lungs was significantly higher in the young mice than in the aged mice at 9 dpi. These results suggest that there may be a correlation between the relatively low level of infiltration of PMNs, macrophages, and T lymphocytes and the delayed body weight loss and longer lasting infections observed in the lungs of the aged mice. These findings provide detailed insights into the age-specific course of infection in young and aged populations with associated differences in lung pathology.
収録刊行物
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- Japanese Journal of Infectious Diseases
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Japanese Journal of Infectious Diseases 65 (5), 383-391, 2012
国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会
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詳細情報 詳細情報について
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- CRID
- 1390282681218032000
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- NII論文ID
- 130001931846
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- NII書誌ID
- AA1132885X
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- ISSN
- 18842836
- 13446304
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- NDL書誌ID
- 023971497
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- PubMed
- 22996210
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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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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可