Pulmonary artery endothelial cell phenotypic alterations in a large animal model of pulmonary arteriovenous malformations after the Glenn shunt
| Autor: | John S. Ikonomidis, Rupak Mukherjee, Christina B. Logdon, Francis G. Spinale, William F. Rawls, Geoffrey A. Forbus, Shaina R. Eckhouse, Risha K Patel, Minoo N. Kavarana, Jeffrey A. Jones, Elizabeth K. Nadeau, Scott M. Bradley, Robert E. Stroud, Eric M. Graham |
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| Rok vydání: | 2013 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty Angiogenesis Swine Pulmonary Artery Article Angiopoietin Arteriovenous Malformations chemistry.chemical_compound Internal medicine medicine.artery medicine Animals Lung biology business.industry Anastomosis Surgical Endothelial Cells Left pulmonary artery Angiopoietin receptor Right pulmonary artery Vascular endothelial growth factor Disease Models Animal medicine.anatomical_structure Phenotype chemistry Pulmonary artery cardiovascular system biology.protein Cardiology Surgery Female Endothelium Vascular Cardiology and Cardiovascular Medicine business Vascular Surgical Procedures |
| Zdroj: | The Annals of thoracic surgery. 96(4) |
| ISSN: | 1552-6259 |
| Popis: | Longevity of the superior cavopulmonary connection (SCPC) is limited by the development of pulmonary arteriovenous malformations (PAVM). The goal of this study was to determine whether phenotypic changes in pulmonary artery endothelial cells (PAEC) that favor angiogenesis occur with PAVM formation.A superior vena cava to right pulmonary artery connection was constructed in 5 pigs. Pulmonary arteries were harvested at 6 to 8 weeks after surgery to establish cultures of PAEC and smooth muscle cells, to determine cell proliferation, gene expression, and tubule formation. Abundance of proteins related to angiogenesis was measured in lung tissue.Contrast echocardiography revealed right-to-left shunting, consistent with PAVM formation. While the proliferation of smooth muscle cells from the right pulmonary artery (shunted side) and left pulmonary artery (nonshunted side) were similar, right PAEC proliferation was significantly higher. Expression profiles of genes encoding cellular signaling proteins were higher in PAECs from the right pulmonary artery versus left pulmonary artery. Protein abundance of angiopoietin-1, and Tie-2 (angiopoietin receptor) were increased in the right lung (both p0.05). Tubule formation was increased in endothelial cells from the right pulmonary artery compared with the left pulmonary artery (404 ± 16 versus 199 ± 71 tubules/mm(2), respectively; p0.05).These findings demonstrate that PAVMs developed in a clinically relevant animal model of SCPC concomitantly with differential changes in PAEC proliferative ability and phenotype. Moreover, there was a significant increase in the angiopoietin/Tie-2 complex in the right lung, which may provide novel therapeutic targets to attenuate PAVM formation after a SCPC. |
| Databáze: | OpenAIRE |
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