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A Porcine Model of Acute Autologous Pulmonary Embolism
Published on: September 6, 2024
Functional characterization of a porcine emphysema model
Camilla Sichlau Bruun1, Louise Kruse Jensen, Páll Skuli Leifsson
1Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 3, 1870, Frederiksberg C, Denmark, cvb@sund.ku.dk.
Lung
|September 18, 2013
Summary
A mutated pig model develops age-related lung emphysema, similar to human disease. Increased MMP9 and MMP12 expression in older pigs with emphysema suggests their role in pathogenesis.
Area of Science:
- Pulmonary Medicine
- Genetics
- Pathology
Background:
- Lung emphysema is a key feature of chronic obstructive pulmonary disease (COPD), a widespread condition.
- While smoking is a primary cause, genetic factors and metalloproteinases (MMPs) like MMP9 and MMP12 are implicated in emphysema pathogenesis.
- ITGB6-/- mice develop spontaneous emphysema due to dysregulated MMP12 expression.
Purpose of the Study:
- To investigate the pathogenesis of age-related lung emphysema in a previously described mutated pig model.
- To compare this pig model to human emphysema and the ITGB6-/- mouse model.
Main Methods:
- Quantitative PCR (qPCR) to assess MMP2, MMP7, MMP9, MMP12, and TGF-β1 expression.
- Immunohistochemical staining for SP-B, SP-C, MMP9, and MMP12.
- Hematologic and immunologic profiling of the pigs.
Main Results:
- No significant differences in gene expression or systemic factors were found via qPCR or hematologic/immunologic studies between emphysematous and non-emphysematous pigs.
- Immunohistochemistry revealed elevated MMP9 and MMP12 expression in older, mutated pigs with emphysema compared to controls.
Conclusions:
- The mutated pig model exhibits morphological and functional similarities to human emphysema patients and the ITGB6-/- mouse model.
- Increased MMP9 and MMP12 expression in this model supports their involvement in emphysema development.
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