1
|
Balasubramanian P, Ghimire M, Pattnaik H, Saunders H, Franco PM, Sanghavi D, Patel NM, Baig H, Bhattacharyya A, Chaudhary S, Guru PK. Clinical Outcomes With Extracorporeal Membrane Oxygenation for Interstitial Lung Disease: Systematic Review and Meta-Analysis. ASAIO J 2024:00002480-990000000-00494. [PMID: 38810214 DOI: 10.1097/mat.0000000000002231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024] Open
Abstract
The evidence on indications, outcomes, and complications with the use of extracorporeal membrane oxygenation (ECMO) in the setting of interstitial lung disease (ILD) is limited in the existing literature. We performed a systematic review and meta-analysis for the use of ECMO in the setting of ILD to study the prognostic factors associated with in-hospital mortality. Eighteen unique studies with a total of 1,356 patients on ECMO for ILD were identified out of which 76.5% were on ECMO as a bridge to transplant (BTT) and the rest as a bridge to recovery (BTR). The overall in-hospital mortality was 45.76%, with 71.3% and 37.8% for BTR and BTT, respectively. Among the various prognostic factors, mortality was lower with younger age (mean difference = 3.15, 95% confidence interval [CI] = 0.82-5.49), use of awake veno-arterial (VA)-ECMO compared to veno-venous (VV)-ECMO (unadjusted odds ratio [OR] = 0.22, 95% CI = 0.13-0.37) in the overall cohort. In the setting of BTT, the use of VA-ECMO had a decreased hazard ratio (HR) compared to VV-ECMO (adjusted HR = 0.34, 95% CI = 0.15-0.81, p = 0.015). The findings of our meta-analysis are critical but are derived from retrospective studies with small sample sizes and thus are of low to very low-GRADE certainty.
Collapse
Affiliation(s)
| | - Manoj Ghimire
- Department of Internal Medicine, Bronx Healthcare, Bronx, New York
| | | | - Hollie Saunders
- From the Department of Pulmonary and Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | | | - Devang Sanghavi
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Neal M Patel
- From the Department of Pulmonary and Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Hassan Baig
- From the Department of Pulmonary and Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | | | - Sanjay Chaudhary
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Pramod K Guru
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| |
Collapse
|
2
|
Arslan A, Smith J, Qureshi MR, Uysal A, Patel KK, Herazo-Maya JD, Bandyopadhyay D. Evolution of pulmonary hypertension in interstitial lung disease: a journey through past, present, and future. Front Med (Lausanne) 2024; 10:1306032. [PMID: 38298504 PMCID: PMC10827954 DOI: 10.3389/fmed.2023.1306032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 11/20/2023] [Indexed: 02/02/2024] Open
Abstract
Interstitial lung diseases (ILD) are a spectrum of disorders often complicated by pulmonary hypertension (PH) in its course. The pathophysiologic mechanism of WHO group 3 PH is different to other forms of PH. The advent of PH is a harbinger for adverse events like mortality and morbidity, implying that the PH component of disease expedites deteriorated clinical outcomes. In fact, WHO group 3 PH due to ILD has the worse prognosis among all groups of PH. Hence, early detection of PH by a comprehensive screening method is paramount. Given considerable overlap in clinical manifestations between ILD and PH, early detection of PH is often elusive. Despite, the treatment of PH due to ILD has been frustrating until recently. Clinical trials utilizing PAH-specific pulmonary vasodilators have been ongoing for years without desired results. Eventually, the INCREASE study (2018) demonstrated beneficial effect of inhaled Treprostinil to treat PH in ILD. In view of this pioneering development, a paradigm shift in clinical approach to this disease phenotype is happening. There is a renewed vigor to develop a well validated screening tool for early detection and management. Currently inhaled Treprostinil is the only FDA approved therapy to treat this phenotype, but emergence of a therapy has opened a plethora of research toward new drug developments. Regardless of all these recent developments, the overall outlook still remains grim in this condition. This review article dwells on the current state of knowledge of pre-capillary PH due to ILD, especially its diagnosis and management, the recent progresses, and future evolutions in this field.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Debabrata Bandyopadhyay
- Division of Pulmonary, Critical Care and Sleep Medicine, University of South Florida, Tampa, FL, United States
| |
Collapse
|
3
|
Averjanovaitė V, Gumbienė L, Zeleckienė I, Šileikienė V. Unmasking a Silent Threat: Improving Pulmonary Hypertension Screening Methods for Interstitial Lung Disease Patients. MEDICINA (KAUNAS, LITHUANIA) 2023; 60:58. [PMID: 38256318 PMCID: PMC10820938 DOI: 10.3390/medicina60010058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024]
Abstract
This article provides a comprehensive overview of the latest literature on the diagnostics and treatment of pulmonary hypertension (PH) associated with interstitial lung disease (ILD). Heightened suspicion for PH arises when the advancement of dyspnoea in ILD patients diverges from the expected pattern of decline in pulmonary function parameters. The complexity of PH associated with ILD (PH-ILD) diagnostics is emphasized by the limitations of transthoracic echocardiography in the ILD population, necessitating the exploration of alternative diagnostic approaches. Cardiac magnetic resonance imaging (MRI) emerges as a promising tool, offering insights into hemodynamic parameters and providing valuable prognostic information. The potential of biomarkers, alongside pulmonary function and cardiopulmonary exercise tests, is explored for enhanced diagnostic and prognostic precision. While specific treatments for PH-ILD remain limited, recent studies on inhaled treprostinil provide new hope for improved patient outcomes.
Collapse
Affiliation(s)
| | - Lina Gumbienė
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, LT-03101 Vilnius, Lithuania;
| | | | - Virginija Šileikienė
- Clinic of Chest Diseases, Immunology and Allergology, Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, LT-03101 Vilnius, Lithuania;
| |
Collapse
|
4
|
Kacprzak A, Tomkowski W, Szturmowicz M. Phenotypes of Sarcoidosis-Associated Pulmonary Hypertension-A Challenging Mystery. Diagnostics (Basel) 2023; 13:3132. [PMID: 37835874 PMCID: PMC10572558 DOI: 10.3390/diagnostics13193132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/27/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
Sarcoidosis has been a well-recognised risk factor for pulmonary hypertension (PH) for a long time, but still, the knowledge about this concatenation is incomplete. Sarcoidosis-associated PH (SAPH) is an uncommon but serious complication associated with increased morbidity and mortality among sarcoidosis patients. The real epidemiology of SAPH remains unknown, and its pathomechanisms are not fully explained. Sarcoidosis is a heterogeneous and dynamic condition, and SAPH pathogenesis is believed to be multifactorial. The main roles in SAPH development play: parenchymal lung disease with the destruction of pulmonary vessels, the extrinsic compression of pulmonary vessels by conglomerate masses, lymphadenopathy or fibrosing mediastinitis, pulmonary vasculopathy, LV dysfunction, and portal hypertension. Recently, it has been recommended to individually tailor SAPH management according to the predominant pathomechanism, i.e., SAPH phenotype. Unfortunately, SAPH phenotyping is not a straightforward process. First, there are gaps in our understanding of undergoing processes. Second, the assessment of such a pivotal element as pulmonary vasculature on a microscopic level is non-feasible in SAPH patients antemortem. Finally, SAPH is a dynamic condition, multiple phenotypes usually coexist, and patients can switch between phenotypes during the course of sarcoidosis. In this article, we summarise the basic knowledge of SAPH, describe SAPH phenotypes, and highlight some practical problems related to SAPH phenotyping.
Collapse
Affiliation(s)
- Aneta Kacprzak
- 1st Department of Lung Diseases, National Tuberculosis and Lung Diseases Institute, Plocka 26, 01-138 Warsaw, Poland
| | | | | |
Collapse
|
5
|
Borek I, Birnhuber A, Voelkel NF, Marsh LM, Kwapiszewska G. The vascular perspective on acute and chronic lung disease. J Clin Invest 2023; 133:e170502. [PMID: 37581311 PMCID: PMC10425217 DOI: 10.1172/jci170502] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023] Open
Abstract
The pulmonary vasculature has been frequently overlooked in acute and chronic lung diseases, such as acute respiratory distress syndrome (ARDS), pulmonary fibrosis (PF), and chronic obstructive pulmonary disease (COPD). The primary emphasis in the management of these parenchymal disorders has largely revolved around the injury and aberrant repair of epithelial cells. However, there is increasing evidence that the vascular endothelium plays an active role in the development of acute and chronic lung diseases. The endothelial cell network in the capillary bed and the arterial and venous vessels provides a metabolically highly active barrier that controls the migration of immune cells, regulates vascular tone and permeability, and participates in the remodeling processes. Phenotypically and functionally altered endothelial cells, and remodeled vessels, can be found in acute and chronic lung diseases, although to different degrees, likely because of disease-specific mechanisms. Since vascular remodeling is associated with pulmonary hypertension, which worsens patient outcomes and survival, it is crucial to understand the underlying vascular alterations. In this Review, we describe the current knowledge regarding the role of the pulmonary vasculature in the development and progression of ARDS, PF, and COPD; we also outline future research directions with the hope of facilitating the development of mechanism-based therapies.
Collapse
Affiliation(s)
- Izabela Borek
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Anna Birnhuber
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Division of Physiology and Pathophysiology, Medical University of Graz, Graz, Austria
| | - Norbert F. Voelkel
- Pulmonary Medicine Department, University of Amsterdam Medical Centers, Amsterdam, Netherlands
- Department of Pulmonary Medicine, Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Leigh M. Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Division of Physiology and Pathophysiology, Medical University of Graz, Graz, Austria
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Division of Physiology and Pathophysiology, Medical University of Graz, Graz, Austria
- Institute for Lung Health, German Lung Center (DZL), Cardiopulmonary Institute, Giessen, Germany
| |
Collapse
|
6
|
Tornling G, Batta R, Salvail D, Raud J, Denton CP. Effects of the Oral Angiotensin II Type 2 Receptor Agonist C21 in Sugen-Hypoxia Induced Pulmonary Hypertension in Rats. Int J Mol Sci 2023; 24:ijms24087478. [PMID: 37108643 PMCID: PMC10139154 DOI: 10.3390/ijms24087478] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
Substantial evidence supports the involvement of the renin-angiotensin system in pulmonary hypertension (PH), and the angiotensin II type 2 receptor (AT2R) is known to exert tissue protective actions. The effect of the selective AT2R agonist C21 (also known as Compound 21 or buloxibutid) was evaluated in the rat Sugen-hypoxia PH model. After a single injection of Sugen 5416 and hypoxia for 21 days, C21 (2 or 20 mg/kg) or vehicle was administered perorally twice daily from Day 21 to Day 55. On Day 56, hemodynamic assessments were performed, and lung and heart tissue were prepared for quantification of cardiac and vascular remodeling and fibrosis. Treatment with C21 20 mg/kg improved cardiac output and stroke volume and decreased right ventricular hypertrophy (all p < 0.05). Treatment with C21 2 mg/kg significantly decreased vessel wall and muscular layer thickness and increased the luminal opening in vessels >100 μm (all p < 0.05). There were no significant differences between the two C21 doses on any parameter, and post hoc analyses comparing the merged C21 groups with the vehicle group showed that C21 treatment reduced vascular remodeling (reduced endothelial proliferation and thickening of the vascular wall) in vessels of all sizes; moreover, the diastolic pulmonary artery pressure and right ventricular pressure were reduced along with reduction of right ventricular hypertrophy. Sugen 5416 and hypoxia increased pulmonary collagen deposition, which was counteracted by C21 20 mg/kg. In conclusion, the effects of C21 on vascular remodeling, hemodynamic alterations, and fibrosis suggest that AT2R agonists may have a role in Group 1 and 3 PH treatment.
Collapse
Affiliation(s)
- Göran Tornling
- Respiratory Medicine Division, Department of Medicine Solna, Karolinska Institutet, 17177 Stockholm, Sweden
| | | | - Dan Salvail
- IPS Therapeutique Inc., Sherbrooke, QC J1L 2T9, Canada
| | - Johan Raud
- Vicore Pharma AB, 11127 Stockholm, Sweden
- Institute of Environmental Medicine, Karolinska Institutet, 17177 Stockholm, Sweden
| | - Christopher P Denton
- Centre for Rheumatology, Royal Free Hospital, University College Medical School, London NW3 2PS, UK
| |
Collapse
|
7
|
Piccari L, Allwood B, Antoniou K, Chung JH, Hassoun PM, Nikkho SM, Saggar R, Shlobin OA, Vitulo P, Nathan SD, Wort SJ. Pathogenesis, clinical features, and phenotypes of pulmonary hypertension associated with interstitial lung disease: A consensus statement from the Pulmonary Vascular Research Institute's Innovative Drug Development Initiative - Group 3 Pulmonary Hypertension. Pulm Circ 2023; 13:e12213. [PMID: 37025209 PMCID: PMC10071306 DOI: 10.1002/pul2.12213] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/03/2023] [Accepted: 03/21/2023] [Indexed: 04/08/2023] Open
Abstract
Pulmonary hypertension (PH) is a frequent complication of interstitial lung disease (ILD). Although PH has mostly been described in idiopathic pulmonary fibrosis, it can manifest in association with many other forms of ILD. Associated pathogenetic mechanisms are complex and incompletely understood but there is evidence of disruption of molecular and genetic pathways, with panvascular histopathologic changes, multiple pathophysiologic sequelae, and profound clinical ramifications. While there are some recognized clinical phenotypes such as combined pulmonary fibrosis and emphysema and some possible phenotypes such as connective tissue disease associated with ILD and PH, the identification of further phenotypes of PH in ILD has thus far proven elusive. This statement reviews the current evidence on the pathogenesis, recognized patterns, and useful diagnostic tools to detect phenotypes of PH in ILD. Distinct phenotypes warrant recognition if they are characterized through either a distinct presentation, clinical course, or treatment response. Furthermore, we propose a set of recommendations for future studies that might enable the recognition of new phenotypes.
Collapse
Affiliation(s)
- Lucilla Piccari
- Department of Pulmonary MedicineHospital del MarBarcelonaSpain
| | - Brian Allwood
- Department of Medicine, Division of PulmonologyStellenbosch University & Tygerberg HospitalCape TownSouth Africa
| | - Katerina Antoniou
- Department of Thoracic MedicineUniversity of Crete School of MedicineHeraklionCreteGreece
| | - Jonathan H. Chung
- Department of RadiologyThe University of Chicago MedicineChicagoIllinoisUSA
| | - Paul M. Hassoun
- Department of Medicine, Division of Pulmonary and Critical Care MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | | | - Rajan Saggar
- Lung & Heart‐Lung Transplant and Pulmonary Hypertension ProgramsUniversity of California Los Angeles David Geffen School of MedicineLos AngelesCaliforniaUSA
| | - Oksana A. Shlobin
- Advanced Lung Disease and Transplant Program, Inova Health SystemFalls ChurchVirginiaUSA
| | - Patrizio Vitulo
- Department of Pulmonary MedicineIRCCS Mediterranean Institute for Transplantation and Advanced Specialized TherapiesPalermoSiciliaItaly
| | - Steven D. Nathan
- Advanced Lung Disease and Transplant Program, Inova Health SystemFalls ChurchVirginiaUSA
| | - Stephen John Wort
- National Pulmonary Hypertension Service at the Royal Brompton HospitalLondonUK
- National Heart and Lung Institute, Imperial CollegeLondonUK
| |
Collapse
|
8
|
Li C, Xia J, Yiminniyaze R, Dong L, Li S. Hub Genes and Immune Cell Infiltration in Hypoxia-Induced Pulmonary Hypertension: Bioinformatics Analysis and In Vivo Validation. Comb Chem High Throughput Screen 2023; 26:2085-2097. [PMID: 36718060 DOI: 10.2174/1386207326666230130093325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Hypoxia-induced pulmonary hypertension (HPH) represents a severe pulmonary disorder with high morbidity and mortality, which necessitates identifying the critical molecular mechanisms underlying HPH pathogenesis. METHODS The mRNA expression microarray GSE15197 (containing 8 pulmonary tissues from HPH and 13 normal controls) was downloaded from Gene Expression Omnibus (GEO). Gene ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) were executed by RStudio software. The Protein-Protein Interaction (PPI) network was visualized and established using Cytoscape, and the cytoHubba app from Cytoscape was used to pick out the hub modules. The infiltration of immune cells in HPH was analyzed using the CIBERSORTx. To confirm the potential hub genes, real-time quantitative reverse transcription PCR (qRT-PCR) was conducted using lung tissues of rat HPH models and controls. RESULTS A total of 852 upregulated and 547 downregulated genes were identified. The top terms in biological processes were apoptosis, proliferation, and regulation of the MAPK cascade, including ERK1/2. Cytoplasm, cytosol, and membrane were enriched in cellular component groups. Molecular functions mainly focus on protein binding, protein serine/threonine kinase activity and identical protein binding. KEGG analysis identified pathways in cancer, regulation of actin cytoskeleton and rap1 signaling pathway. There was significantly different immune cell infiltration between HPH and normal control samples. High proportions of the memory subsets of B cells and CD4 cells, Macrophages M2 subtype, and resting Dendritic cells were found in HPH samples, while high proportions of naive CD4 cells and resting mast cells were found in normal control samples. The qRT-PCR results showed that among the ten identified hub modules, FBXL3, FBXL13 and XCL1 mRNA levels were upregulated, while NEDD4L, NPFFR2 and EDN3 were downregulated in HPH rats compared with control rats. CONCLUSION Our study revealed the key genes and the involvement of immune cell infiltration in HPH, thus providing new insight into the pathogenesis of HPH and potential treatment targets for patients with HPH.
Collapse
Affiliation(s)
- Chengwei Li
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Jingwen Xia
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Ruzetuoheti Yiminniyaze
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Liang Dong
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Shengqing Li
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
| |
Collapse
|
9
|
Waxman AB, Elia D, Adir Y, Humbert M, Harari S. Recent advances in the management of pulmonary hypertension with interstitial lung disease. Eur Respir Rev 2022; 31:31/165/210220. [PMID: 35831007 DOI: 10.1183/16000617.0220-2021] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 05/23/2022] [Indexed: 11/05/2022] Open
Abstract
Pulmonary hypertension (PH) is known to complicate various forms of interstitial lung disease (ILD), including idiopathic pulmonary fibrosis, the interstitial pneumonias and chronic hypersensitivity pneumonitis. Pathogenesis of PH-ILD remains incompletely understood, and probably has overlap with other forms of pre-capillary pulmonary hypertension. PH-ILD carries a poor prognosis, and is associated with increased oxygen requirements, and a decline in functional capacity and exercise tolerance. Despite most patients having mild-moderate pulmonary hypertension, more severe pulmonary hypertension and signs of right heart failure are observed in a subset of cases. Clinical suspicion and findings on pulmonary function, computed tomography and echocardiography are often the initial steps towards diagnosis. Definitive diagnosis is obtained by right heart catheterisation demonstrating pre-capillary pulmonary hypertension. Drugs approved for pulmonary arterial hypertension have been investigated in several randomised controlled trials in PH-ILD patients, leading to discouraging results until the recent INCREASE study. This review provides an overview of the current understanding, approach to diagnosis and recent advances in treatment.
Collapse
Affiliation(s)
- Aaron B Waxman
- Center for Pulmonary Heart Disease, Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Davide Elia
- Unità di Pneumologia e Terapia Semi-Intensiva Respiratoria, Servizio di Fisiopatologia Respiratoria ed Emodinamica Polmonare, MultiMedica IRCCS, Milan, Italy
| | - Yochai Adir
- Pulmonology Division, Lady Davis-Carmel Medical Center, Haifa, Israel.,Bruce and Ruth Rappaport Faculty of Medicine, The Technion, Haifa, Israel
| | - Marc Humbert
- Université Paris-Saclay, INSERM UMR_S 999, Assistance Publique Hôpitaux de Paris, Department of Respiratory and Intensive Care Medicine, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
| | - Sergio Harari
- Unità di Pneumologia e Terapia Semi-Intensiva Respiratoria, Servizio di Fisiopatologia Respiratoria ed Emodinamica Polmonare, MultiMedica IRCCS, Milan, Italy.,Dept of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| |
Collapse
|
10
|
Beyond Bronchiolitis Obliterans: In-Depth Histopathologic Characterization of Bronchiolitis Obliterans Syndrome after Lung Transplantation. J Clin Med 2021; 11:jcm11010111. [PMID: 35011851 PMCID: PMC8745215 DOI: 10.3390/jcm11010111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 12/31/2022] Open
Abstract
Bronchiolitis obliterans syndrome (BOS) is considered an airway-centered disease, with bronchiolitis obliterans (BO) as pathologic hallmark. However, the histologic spectrum of pure clinical BOS remains poorly characterized. We provide the first in-depth histopathologic description of well-characterized BOS patients and patients without chronic lung allograft dysfunction (CLAD), defined according to the recent consensus guidelines. Explant lung tissue from 52 clinically-defined BOS and 26 non-CLAD patients (collected 1993-2018) was analyzed for histologic parameters, including but not limited to airway lesions, vasculopathy and fibrosis. In BOS, BO lesions were evident in 38 (73%) patients and varied from concentric sub-epithelial fibrotic BO to inflammatory BO, while 10/14 patients without BO displayed 'vanishing airways', defined by a discordance between arteries and airways. Chronic vascular abnormalities were detected in 22 (42%) patients. Ashcroft fibrosis scores revealed a median of 43% (IQR: 23-69) of normal lung parenchyma per patient; 26% (IQR: 18-37) of minimal alveolar fibrous thickening; and 11% (IQR: 4-18) of moderate alveolar thickening without architectural damage. Patchy areas of definite fibrotic damage to the lung structure (i.e., Ashcroft score ≥5) were present in 28 (54%) patients. Fibrosis was classified as bronchocentric (n = 21/28, 75%), paraseptal (n = 17/28, 61%) and subpleural (n = 15/28, 54%). In non-CLAD patients, BO lesions were absent, chronic vascular abnormalities present in 1 (4%) patient and mean Ashcroft scores were significantly lower compared to BOS (p = 0.0038) with 78% (IQR: 64-88) normally preserved lung parenchyma. BOS explant lungs revealed evidence of various histopathologic findings, including vasculopathy and fibrotic changes, which may contribute to the pathophysiology of BOS.
Collapse
|
11
|
Pulmonary hypertension in fibrosing idiopathic interstitial pneumonia: Uncertainties, challenges and opportunities. J Heart Lung Transplant 2021; 40:872-881. [PMID: 33832831 DOI: 10.1016/j.healun.2021.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 02/14/2021] [Accepted: 03/02/2021] [Indexed: 11/23/2022] Open
Abstract
Pulmonary hypertension is a serious complication of chronic fibrosing idiopathic interstitial pneumonia (PH-fIIP) leading to greater morbidity and mortality. The pathophysiologic basis for PH in fIIP is not completely understood, but microvascular rarefaction may play a key role. Severe hypoxemia and reduced diffusion capacity are characteristic. Doppler echocardiography has limited diagnostic utility and right heart catheterization is required to confirm the diagnosis. Lung volumes can be minimally affected, and radiographic findings can be subtle, making the distinction from pulmonary arterial hypertension challenging. Several randomized controlled trials of pulmonary arterial hypertension targeted therapies have recently been completed. Endothelin-receptor antagonists have shown either no benefit or harm. Sildenafil may have some favorable short-term effects but does not appear to impact long-term outcomes. Riociguat treatment increased hospitalizations and mortality. A recent trial of inhaled treprostinil demonstrated improved exercise capacity, but the impact on long-term morbidity and mortality are unknown. Currently, the only viable option for improved survival is lung transplantation. Early referral is imperative to optimize post-transplant outcomes.
Collapse
|
12
|
Hage R, Gautschi F, Steinack C, Schuurmans MM. Combined Pulmonary Fibrosis and Emphysema (CPFE) Clinical Features and Management. Int J Chron Obstruct Pulmon Dis 2021; 16:167-177. [PMID: 33536752 PMCID: PMC7850450 DOI: 10.2147/copd.s286360] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/30/2020] [Indexed: 01/14/2023] Open
Abstract
Background Combined pulmonary fibrosis and emphysema (CPFE) is an underrecognized syndrome characterized by chronic, progressive disease with a dismal prognosis. Frequent co-morbidities with a higher incidence than in idiopathic pulmonary fibrosis or emphysema alone are pulmonary hypertension (WHO group 3) in 47–90% of the patients and lung cancer in 46.8% of the patients. Objective Review current evidence and knowledge concerning diagnosis, risk factors, disease evolution and treatment options of CPFE. Methods We searched studies reporting CPFE in original papers, observational studies, case reports, and meta-analyses published between 1990 and August 2020, in the PubMed, Embase, Cochrane Library, Wiley Online Library databases and Google Scholar using the search terms [CPFE], [pulmonary fibrosis] OR [IPF] AND [emphysema]. Bibliographies of retrieved articles were searched as well. Further inclusion criteria were publications in English, French, German and Italian, with reference to humans. In vitro data and animal data were not considered unless they were mentioned in studies reporting predominantly human data. Results Between May 1, 1990, and September 1, 2020, we found 16 studies on CPFE from the online sources and bibliographies. A total of 890 patients are described in the literature. Although male/female ratio was not reported in all studies, the large majority of patients were male (at least 78%), most of them were current or former heavy smokers. Conclusion CPFE is a syndrome presenting with dyspnea on exertion followed by disruptive cough and recurrent exacerbations. The disease may progress rapidly, be aggravated by pulmonary hypertension WHO group 3 and is associated with an increased risk of lung cancer. Smoking and male sex are important risk factors. There is a need for more research on CPFE especially relating to etiology, influence of genetics, treatment and prevention options. Antifibrotic therapy might be an interesting treatment option for these patients.
Collapse
Affiliation(s)
- René Hage
- University Hospital Zurich, Division of Pulmonology, Zurich, Switzerland.,University of Zurich, Faculty of Medicine, Zurich, Switzerland
| | - Fiorenza Gautschi
- University Hospital Zurich, Division of Pulmonology, Zurich, Switzerland.,University of Zurich, Faculty of Medicine, Zurich, Switzerland
| | - Carolin Steinack
- University Hospital Zurich, Division of Pulmonology, Zurich, Switzerland.,University of Zurich, Faculty of Medicine, Zurich, Switzerland
| | - Macé M Schuurmans
- University Hospital Zurich, Division of Pulmonology, Zurich, Switzerland.,University of Zurich, Faculty of Medicine, Zurich, Switzerland
| |
Collapse
|