Abstract
Tumor necrosis factor-α (TNF-α) has two forms with apparently different biological activities: a membrane-associated form and a soluble form. TNF-α-converting enzyme (TACE) mediates a cleavage of membrane-associated TNF-α to induce its bioactive soluble form. We hypothesized that inhibition of TACE might prevent TNF-α-induced tissue injury while preserving the benefits of TNF-α. In this study, we evaluated the role of TACE in acute inflammation using an inhibitor of the enzyme in a rat model of lung transplantation. Inbred Lewis rats underwent left lung isotransplantation, and the donor lungs were kept in Euro-Collins solution with or without the inhibitor. After 6 hours of ischemia, the left lung was transplanted into the recipient rat and reperfused for 4 hours. Inhibition of TACE significantly attenuated endothelial and alveolar septal damage, as assessed by radiolabeled albumin leakage after transplantation. The inhibition also attenuated neutrophil accumulation in the alveolar space and other histopathologic findings, including intercellular adhesion molecule-1 expression. In addition, significantly lower levels of monocyte chemotactic protein-1, cytokine-induced neutrophil chemoattractant-1, high mobility group box-1, and soluble epithelial cadherin and decreased neutrophil elastase activity were observed in bronchoalveolar lavage fluid from the rats treated with the inhibitor. We conclude that TACE mediates a critical step in the development of post-transplantation lung injury.
| Original language | English |
|---|---|
| Pages (from-to) | 1239-1246 |
| Number of pages | 8 |
| Journal | American Journal of Respiratory and Critical Care Medicine |
| Volume | 170 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2004 Dec 1 |
| Externally published | Yes |
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Keywords
- Acute inflammation
- Epithelial cadherin
- High mobility group box-1
- Lung transplantation
- TNF-α-converting enzyme
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
Cite this
Importance of tumor necrosis factor-α cleavage process in post-transplantation lung injury in rats. / Goto, Taichiro; Ishizaka, Akitoshi; Kobayashi, Fujio; Kohno, Mitsutomo; Sawafuji, Makoto; Tasaka, Sadatomo; Ikeda, Eiji; Okada, Yasunori; Maruyama, Ikuro; Kobayashi, Koichi.
In: American Journal of Respiratory and Critical Care Medicine, Vol. 170, No. 11, 01.12.2004, p. 1239-1246.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Importance of tumor necrosis factor-α cleavage process in post-transplantation lung injury in rats
AU - Goto, Taichiro
AU - Ishizaka, Akitoshi
AU - Kobayashi, Fujio
AU - Kohno, Mitsutomo
AU - Sawafuji, Makoto
AU - Tasaka, Sadatomo
AU - Ikeda, Eiji
AU - Okada, Yasunori
AU - Maruyama, Ikuro
AU - Kobayashi, Koichi
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Tumor necrosis factor-α (TNF-α) has two forms with apparently different biological activities: a membrane-associated form and a soluble form. TNF-α-converting enzyme (TACE) mediates a cleavage of membrane-associated TNF-α to induce its bioactive soluble form. We hypothesized that inhibition of TACE might prevent TNF-α-induced tissue injury while preserving the benefits of TNF-α. In this study, we evaluated the role of TACE in acute inflammation using an inhibitor of the enzyme in a rat model of lung transplantation. Inbred Lewis rats underwent left lung isotransplantation, and the donor lungs were kept in Euro-Collins solution with or without the inhibitor. After 6 hours of ischemia, the left lung was transplanted into the recipient rat and reperfused for 4 hours. Inhibition of TACE significantly attenuated endothelial and alveolar septal damage, as assessed by radiolabeled albumin leakage after transplantation. The inhibition also attenuated neutrophil accumulation in the alveolar space and other histopathologic findings, including intercellular adhesion molecule-1 expression. In addition, significantly lower levels of monocyte chemotactic protein-1, cytokine-induced neutrophil chemoattractant-1, high mobility group box-1, and soluble epithelial cadherin and decreased neutrophil elastase activity were observed in bronchoalveolar lavage fluid from the rats treated with the inhibitor. We conclude that TACE mediates a critical step in the development of post-transplantation lung injury.
AB - Tumor necrosis factor-α (TNF-α) has two forms with apparently different biological activities: a membrane-associated form and a soluble form. TNF-α-converting enzyme (TACE) mediates a cleavage of membrane-associated TNF-α to induce its bioactive soluble form. We hypothesized that inhibition of TACE might prevent TNF-α-induced tissue injury while preserving the benefits of TNF-α. In this study, we evaluated the role of TACE in acute inflammation using an inhibitor of the enzyme in a rat model of lung transplantation. Inbred Lewis rats underwent left lung isotransplantation, and the donor lungs were kept in Euro-Collins solution with or without the inhibitor. After 6 hours of ischemia, the left lung was transplanted into the recipient rat and reperfused for 4 hours. Inhibition of TACE significantly attenuated endothelial and alveolar septal damage, as assessed by radiolabeled albumin leakage after transplantation. The inhibition also attenuated neutrophil accumulation in the alveolar space and other histopathologic findings, including intercellular adhesion molecule-1 expression. In addition, significantly lower levels of monocyte chemotactic protein-1, cytokine-induced neutrophil chemoattractant-1, high mobility group box-1, and soluble epithelial cadherin and decreased neutrophil elastase activity were observed in bronchoalveolar lavage fluid from the rats treated with the inhibitor. We conclude that TACE mediates a critical step in the development of post-transplantation lung injury.
KW - Acute inflammation
KW - Epithelial cadherin
KW - High mobility group box-1
KW - Lung transplantation
KW - TNF-α-converting enzyme
UR - http://www.scopus.com/inward/record.url?scp=9644291405&partnerID=8YFLogxK
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U2 - 10.1164/rccm.200402-146OC
DO - 10.1164/rccm.200402-146OC
M3 - Article
VL - 170
SP - 1239
EP - 1246
JO - American Journal of Respiratory and Critical Care Medicine
JF - American Journal of Respiratory and Critical Care Medicine
SN - 1073-449X
IS - 11
ER -