The porcine biomodel in translational medical research: From biomodel to human lung transplantation
Abstract
Introduction: Human and porcine anatomy are comparable. In consequence, the porcine biomodel has the potential to be implemented in the training of surgical professionals in areas such as solid organ transplantation.
Objectives: We described the procedures and findings obtained in the experiments of translational respiratory medicine with the porcine biomodel, within an experimentation animal laboratory, and we present a comparative review between human and porcine lung.
Materials and methods: The experiment was done in nine pigs of hybrid race within a laboratory of experimental surgery. The anatomy and histology of the respiratory tract were studied with fibrobronchoscopy, bronchial biopsy and bronchoalveolar lavage. The bronchoalveolar lavage was studied with liquid-based cytology and assessed with Papanicolau and hematoxylin-eosin staining. Molecular pathology techniques such as immunohistochemistry, flow cytometry, and electronic microscopy were implemented. The pigs were subjected to left pneumonectomy with posterior implantation of the graft into another experimental pig.
Results: Histopathologic and molecular studies evidenced predominance of alveolar macrophages (98%) and T-lymphocytes (2%) in the porcine bronchoalveolar lavage. Studies on the porcine lung parenchyma revealed hyperplasic lymphoid tissue associated with the bronchial walls. Electronic microscopy evidenced the presence of T-lymphocytes within the epithelium and the cilia diameter was similar to the human.
Conclusions: The porcine biomodel is a viable tool in translational research applied to the understanding of the respiratory system anatomy and the training in lung transplantation. The implementation of this experimental model has the potential to strength the groups who plan to implement an institutional program of lung transplantation in humans.
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References
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