Plaque composition in plexogenic and thromboembolic pulmonary hypertension: the critical role of thrombotic material in pultaceous core formation
| Autor: | Mauro Viganò, Gaetano Minzioni, Andrea Maria D'Armini, Alessandra Repetto, Luigi Tavazzi, Patrizia Morbini, Eloisa Arbustini, F. Piovella |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty Arteriosclerosis medicine.medical_treatment Hypertension Pulmonary Risk Factors Thromboembolism medicine Lung transplantation Humans Pulmonary pathology Thrombus Lung Neovascularization Pathologic Vascular disease business.industry Respiratory disease Editorials Middle Aged medicine.disease Pulmonary hypertension Immunohistochemistry medicine.anatomical_structure Basic Research Eisenmenger syndrome Female Cardiology and Cardiovascular Medicine business |
| Popis: | Background: Patients with pulmonary hypertension develop intimal plaques in large pulmonary arteries. Objective: To test the hypothesis that the composition of such plaques differs depending on whether the aetiology of the disease is thromboembolic or hypertensive. Design: Chronic thromboembolic and plexogenic pulmonary hypertension (primary and secondary (Eisenmenger syndrome)) were investigated. These are spontaneous human models and were used to examine the independent role of thrombus and hypertension in plaque composition. Setting: A national tertiary referral centre for lung transplantation and pulmonary thromboendoarterectomy. Patients: Thirty nine patients with chronic thromboembolic pulmonary hypertension who had undergone thromboendoarterectomy (n = 32) or lung transplantation (n = 7), 28 with plexogenic diseases (nine primary and 19 Eisenmenger), and three with Eisenmenger syndrome complicated by thromboembolic events. Interventions: The lung and thromboendoarterectomy samples were sectioned, stained with Movat pentachrome, and immunostained with antibodies for fibrin, platelets, inflammatory cells, smooth muscle cells, and erythrocyte membrane glycophorin A. Main outcome measure: Composition of the plaques affecting large pulmonary arteries. Results: Two types of intimal lesion were distinguished in chronic thromboembolic pulmonary hypertension: fibrous plaques with angioneogenesis; and core-rich atherosclerotic plaques with pultaceous cores largely consisting of glycophorin immunoreactive material, with cholesterol clefts (61.5%), CD68 positive macrophages (84.6%), T lymphocytes (87%), and calcification (46.1%). The samples from the patients with Eisenmenger syndrome and thromboembolic complications had similar characteristics, whereas those from patients with uncomplicated primary pulmonary hypertension had core-free fibrous plaques, spotted with macrophages and T lymphocytes. Conclusions: Chronic thromboembolic pulmonary hypertension is associated with atherosclerotic plaques with glycophorin-rich pultaceous cores, and plexogenic pulmonary hypertension with fibrous plaques. Thromboembolic material thus plays a critical role in the formation of pultaceous cores, of which erythrocyte membrane derived glycophorin is a major component. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|