Volume 44, Issue 4 pp. 319-332
Editor-Communicated Paper
Free Access

The Role of Osteopontin in the Development of Granulomatous Lesions in Lung

Satoru Chiba

Satoru Chiba

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

Department of Cardiovascular Medicine, Hokkaido University Medical School, Sapporo, Hokkaido, 060-0815 Japan

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Mohammod Mizanur Rashid

Mohammod Mizanur Rashid

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

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Hiroshi Okamoto

Hiroshi Okamoto

Department of Cardiovascular Medicine, Hokkaido University Medical School, Sapporo, Hokkaido, 060-0815 Japan

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Hirotake Shiraiwa

Hirotake Shiraiwa

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

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Shigeyuki Kon

Shigeyuki Kon

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

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Masahiro Maeda

Masahiro Maeda

Immuno-Biological Laboratories, Fujioka, Gunma, 375-0005 Japan

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Masaaki Murakami

Masaaki Murakami

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

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Manabu Inobe

Manabu Inobe

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

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Akira Kitabatake

Akira Kitabatake

Department of Cardiovascular Medicine, Hokkaido University Medical School, Sapporo, Hokkaido, 060-0815 Japan

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Ann F. Chambers

Ann F. Chambers

The London Regional Cancer Centre, London, Ontario, Canada

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Toshimitsu Uede

Corresponding Author

Toshimitsu Uede

Section of Immunopathogenesis, Institute of Immunological Science, Hokkaido University, Sapporo, Hokkaido, 060-0815 Japan

Address correspondence to Dr. Toshimitsu Uede, Institute of Immunological Science, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Hokkaido 060-0815, Japan. Fax and Phone: 81-11-736-9836. E-mail: [email protected].Search for more papers by this author
First published: 14 November 2013
Citations: 18

Abstract

Osteopontin (OPN) has been shown to be expressed by cells in granulomas of various origins, but whether it plays a functional role in granuloma formation is not known. Here we used a cardiomyopathic hamster (T02) model, to test the hypothesis that OPN contributes functionally to granuloma development. We immunized cardiomyopathic and normal hamsters by subcutaneous injection of bovine serum albumin in complete Freund's adjuvant, and assessed various tissues for both OPN RNA expression and granuloma formation. Cardiomyopathic hamsters expressed OPN, and formed granulomatous lesions, in heart tissue in both immunized and untreated animals. In addition, immunization induced expression of OPN in lung and lymph nodes of cardiomyopathic (but not normal) hamsters, and also induced granuloma formation in these organs. To test whether OPN expression could play a functional role in inducing granulomas, we produced an adenoviral vector containing the murine OPN gene, and introduced this vector intratracheally into the lungs of normal hamsters. The OPN-containing vector, but not the control vector, induced pulmonary granuloma formation. These studies provided direct in vivo evidence that OPN can contribute functionally to the formation of granulomatous lesions, and suggest that OPN expression may be a common factor involved in formation of granulomas of various origin.

Abbreviations

  • BAL
  • bronchoalveolar lavage
  • BALF
  • BAL fluid
  • BSA-CFA
  • bovine serum albumin in complete Freund's adjuvant
  • DIG
  • digoxigenin
  • ELISA
  • enzyme linked immunoabsorbent assey
  • ETA-1
  • early T-lymphocyte acivation antigen-1
  • GM-CSF
  • granulocyte/macrophage colony stimulating factor
  • GST
  • glutathione S transferase
  • HE
  • hematoxylin and eosin
  • IFN-γ
  • interferon gamma
  • IL
  • interleukin
  • MCP-1
  • monocyte chemoattractant protein-1
  • MIP-1α
  • macrophage inflammatory protein la
  • NO
  • nitric oxide
  • NOS
  • nitric oxide synthase
  • OPN
  • osteopontin
  • PCR
  • polymerase chain reaction
  • PFU
  • plaque forming unit
  • PPD
  • protein purified derivatives
  • RT
  • reverse transcriptase
  • SDS
  • sodium dodecyl sulfate
  • TGF-β
  • tranforming growth factor beta.
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