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Tajima Y, Seow CY, Dong SJ, Tsutsui M, Cheung CY, Welch I, Mowbray L, Imlach B, Hildebrandt R, Apperloo K, Ryomoto B, Goodacre E, Myrdal C, Machan L, Wolff K, Elizur E, Vasilescu DM, Sin DD. Development of a unilateral porcine emphysema model induced by porcine pancreatic elastase. J Appl Physiol (1985) 2023; 135:1001-1011. [PMID: 37767558 DOI: 10.1152/japplphysiol.00801.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 09/05/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Emphysema is one of the pathological hallmarks of chronic obstructive pulmonary disease. We have recently reported that radiofrequency therapy improves lung function in rodent models of emphysema. However, preclinical data using large animals is necessary for clinical translation. Here, we describe the work performed to establish a unilateral porcine emphysema model. Different doses of porcine pancreatic elastase (PPE) were instilled into the left lung of 10 Yucatan pigs. Three additional pigs were used as controls. Six weeks after instillation, lungs were harvested. Lung compliance was measured by a water displacement method and plethysmography. Systematic uniform random sampling of the left and right lungs was performed independently to measure alveolar surface area using micro-computed tomography (micro-CT) and histology. In pigs instilled with 725-750 U/kg of PPE (PPE group, n = 6), the compliance of the left lung was significantly higher by 37.6% than that of the right lung (P = 0.03) using the water displacement method. With plethysmography, the volume of the left lung was significantly larger than that of the right lung at 3, 5, and 10 cmH2O. Measurements from either micro-CT or histology images showed a significant decrease in alveolar surface area by 14.2% or 14.5% (P = 0.031) in the left lung compared with the right lung of the PPE group. A unilateral model for mild emphysema in Yucatan pigs has been established, which can now be used for evaluating novel therapeutics and interventional strategies.NEW & NOTEWORTHY For clinical translation, preclinical data using large animal models is necessary. However, papers describing an emphysema model in pigs, which are anatomically and physiologically similar to humans, are lacking. Here, we report success in creating a unilateral mild-emphysema model in pigs with only one single dose of porcine pancreatic elastase. This model will be useful in bringing novel technologies and therapies from small animals to humans with emphysema.
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Affiliation(s)
- Yuki Tajima
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Chun Y Seow
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shou-Jin Dong
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
- Respiratory Department, Chengdu First People's Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Mai Tsutsui
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Chung Y Cheung
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ian Welch
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Laura Mowbray
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Brittany Imlach
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Rhonda Hildebrandt
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kayla Apperloo
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Brian Ryomoto
- Centre for Comparative Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Evan Goodacre
- Ikomed Technologies Inc, Vancouver, British Columbia, Canada
| | - Corey Myrdal
- Ikomed Technologies Inc, Vancouver, British Columbia, Canada
| | - Lindsay Machan
- Ikomed Technologies Inc, Vancouver, British Columbia, Canada
| | - Kim Wolff
- Ikomed Technologies Inc, Vancouver, British Columbia, Canada
| | - Eran Elizur
- Ikomed Technologies Inc, Vancouver, British Columbia, Canada
| | - Dragoș M Vasilescu
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Don D Sin
- Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
- Division of Respiratory Medicine, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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