In the Face of Chronic Aspiration,Prolonged Ischemic Time Exacerbates Obliterative Bronchiolitis in Rat Pulmonary Allografts |
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| Authors: | J.‐C. Chang J. H. Leung T. Tang M. G. Hartwig Z. E. Holzknecht W. Parker R. D. Davis S. S. Lin |
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| Affiliation: | 1. Department of Surgery;2. Department of Pathology, Duke University Medical Center, Durham, NC;3. Division of Thoracic and Cardiovascular Surgery, Buddhist Tzu Chi General Hospital, Hualien, Taiwan;4. The Thoracic and Cardiovascular Surgery, The Second Xiangya Hospital, Changsha City, Hunan Province, Peoples Republic of China;5. Department of Immunology, Duke University Medical Center, Durham, NC |
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| Abstract: | Aspiration of gastric fluid into the lung mediates the development of obliterative bronchiolitis (OB) in orthotopic WKY‐to‐F344 rat pulmonary transplants that have been subjected to immunosuppression with cyclosporine. However, the contribution of ischemic time to this process remains unknown. In this study, the effect of long (n = 16) and short (n = 12) ischemic times (average of 6 h and of 73 min, respectively) on rat lung transplants receiving aspiration of gastric fluid was assessed. Long ischemic times (LIT) led to significantly (p < 0.05) greater development of OB (ratio of OB lesions/total airways = 0.45 ± 0.07, mean ± standard error) compared to short ischemic times (ratio = 0.19 ± 0.05). However, the development of OB was dependent on aspiration, as controls receiving aspiration with normal saline showed little development of OB, regardless of ischemic time (p < 0.05). These data suggest that LIT, while insufficient by itself to lead to OB, works synergistically with aspiration of gastric fluid to exacerbate the development of OB. |
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| Keywords: | Aspiration gastric fluid ischemia obliterative bronchiolitis pulmonary allograft transplant |
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