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Abstract
Solid organ transplantation is a life-saving treatment for people with end-stage organ disease. Immune-mediated transplant rejection is a common complication that decreases allograft survival. Although immunosuppression is required to prevent rejection, it also increases the risk of infection. Some infections, such as cytomegalovirus and BK virus, can promote inflammatory gene expression that can further tip the balance toward rejection. BK virus and other infections can induce damage that resembles the clinical pathology of rejection, and this complicates accurate diagnosis. Moreover, T cells specific for viral infection can lead to rejection through heterologous immunity to donor antigen directly mediated by antiviral cells. Thus, viral infections and allograft rejection interact in multiple ways that are important to maintain immunologic homeostasis in solid organ transplant recipients. Better insight into this dynamic interplay will help promote long-term transplant survival.
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Affiliation(s)
- Lauren E Higdon
- Department of Medicine/Nephrology, Stanford University, Palo Alto, CA
| | - Jane C Tan
- Department of Medicine/Nephrology, Stanford University, Palo Alto, CA
| | - Jonathan S Maltzman
- Department of Medicine/Nephrology, Stanford University, Palo Alto, CA
- Geriatric Research Education and Clinical Center, VA Palo Alto Health Care System, Palo Alto, CA
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2
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Gómez de Antonio D, Campo-Cañaveral de la Cruz JL, Zurita M, Santos M, González Lois C, Varela de Ugarte A, Vaquero J. Bone Marrow-derived Mesenchymal Stem Cells and Chronic Allograft Disease in a Bronchiolitis Obliterans Animal Model. Arch Bronconeumol 2020; 56:149-156. [PMID: 31296434 DOI: 10.1016/j.arbres.2019.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Bronchiolitis obliterans (BO) is the most common expression of chronic allograft dysfunction in lung transplantation. Moreover, BO represents the major cause of death in the long-term after this procedure. On the other hand, mesenchymal stem cells have been tested in animal models of BO aiming to interfere in its development. The aim of this experimental study is to explore the role of bone-marrow derived stem cells (BMSCs) as a preventive intervention of BO occurrence. MATERIALS AND METHODS This an experimental randomized study. A bronchiolitis obliterans animal model in rats was reproduced: heterotopical tracheal transplant model in lung parenchyma. Five of these animals were used as control group. After setting up the model, individuals were divided in 3 groups of treatment (n=15), in which BMSCs were administered in 3 different time points after the tracheal transplant (tracheal transplantation and BMSCs administration occurred the same day, group G0; after 7 days, group G7; after 14 days, group G14. In addition, within each group, BMSCs were administered through 3 different routes: endotracheally, endovascular and topically in the lung parenchyma). Animals were sacrificed at 21 days. Histology, fluorescence in situ hybridization and immunohistochemistry techniques were performed for identifying stem cells. RESULTS Compared to control group, animals receiving BMSCs showed large neovessels in a loose fibrous matrix. Group G7 showed less fibrosis (p<0.033) and edema (p<0.028). Moreover, G7 animals receiving stem cells endotracheally showed no fibrosis (p<0.008). Alveolar-like patches of tissue were observed among all groups (53.4%, 46.7% and 40% in G0, G7 and G14 respectively), consisting of cells expressing both stem and alveolar cells biomarkers. CONCLUSION BMSCs modify the course of bronchiolitis obliterans and differentiate into alveolar cells. Endotracheal administration of BMSCs 7 days after the heterotopical tracheal transplant might be considered an effective way to prevent BO in this animal model.
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Affiliation(s)
- David Gómez de Antonio
- Thoracic Surgery Department, Hospital Universitario Puerta de Hierro, Majadahonda, Spain.
| | | | - Mercedes Zurita
- Neuroscience Laboratory, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
| | - Martin Santos
- Veterinary Department, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
| | - Carmen González Lois
- Pathology Department, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
| | | | - Jesús Vaquero
- Neuroscience Laboratory, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
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3
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Mahajan AK, Folch E, Khandhar SJ, Channick CL, Santacruz JF, Mehta AC, Nathan SD. The Diagnosis and Management of Airway Complications Following Lung Transplantation. Chest 2017; 152:627-638. [DOI: 10.1016/j.chest.2017.02.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/30/2017] [Accepted: 02/20/2017] [Indexed: 10/20/2022] Open
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4
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Microbiome in the pathogenesis of cystic fibrosis and lung transplant-related disease. Transl Res 2017; 179:84-96. [PMID: 27559681 DOI: 10.1016/j.trsl.2016.07.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/26/2016] [Accepted: 07/27/2016] [Indexed: 01/01/2023]
Abstract
Significant advances in culture-independent methods have expanded our knowledge about the diversity of the lung microbial environment. Complex microorganisms and microbial communities can now be identified in the distal airways in a variety of respiratory diseases, including cystic fibrosis (CF) and the posttransplantation lung. Although there are significant methodologic concerns about sampling the lung microbiome, several studies have now shown that the microbiome of the lower respiratory tract is distinct from the upper airway. CF is a disease characterized by chronic airway infections that lead to significant morbidity and mortality. Traditional culture-dependent methods have identified a select group of pathogens that cause exacerbations in CF, but studies using bacterial 16S rRNA gene-based microarrays have shown that the CF microbiome is an intricate and dynamic bacterial ecosystem, which influences both host immune health and disease pathogenesis. These microbial communities can shift with external influences, including antibiotic exposure. In addition, there have been a number of studies suggesting a link between the gut microbiome and respiratory health in CF. Compared with CF, there is significantly less knowledge about the microbiome of the transplanted lung. Risk factors for bronchiolitis obliterans syndrome, one of the leading causes of death, include microbial infections. Lung transplant patients have a unique lung microbiome that is different than the pretransplanted microbiome and changes with time. Understanding the host-pathogen interactions in these diseases may suggest targeted therapies and improve long-term survival in these patients.
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Tokman S, Hays SR, Leard LE, Bush EL, Kukreja J, Kleinhenz ME, Golden JA, Singer JP. Prolonged Barium-Impaction Ileus in Two Lung Transplant Recipients With Systemic Sclerosis: Case Report. Transplant Proc 2016; 47:2965-7. [PMID: 26707322 DOI: 10.1016/j.transproceed.2015.10.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 10/20/2015] [Indexed: 11/15/2022]
Abstract
Lung transplantation can be a life-saving measure for people with end-stage lung disease from systemic sclerosis. However, outcomes of lung transplantation may be compromised by gastrointestinal manifestations of systemic sclerosis, which can involve any part of the gastrointestinal tract. Esophageal and gastric disease can be managed by enteral feeding with the use of a gastrojejunal feeding tube. In this report, we describe the clinical courses of 2 lung transplant recipients with systemic sclerosis who experienced severe and prolonged barium-impaction ileus after insertion of a percutaneous gastrojejunal feeding tube.
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Affiliation(s)
- S Tokman
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California; Advanced Lung Disease and Lung Transplant Program, Norton Thoracic Institute, St Joseph's Hospital and Medical Center, Phoenix, Arizona.
| | - S R Hays
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California
| | - L E Leard
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California
| | - E L Bush
- Division of Cardiothoracic Surgery, Department of Surgery, University of California, San Francisco, California
| | - J Kukreja
- Division of Cardiothoracic Surgery, Department of Surgery, University of California, San Francisco, California
| | - M E Kleinhenz
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California
| | - J A Golden
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California
| | - J P Singer
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of California, San Francisco, California
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6
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Song MK, De Vito Dabbs AJ. Advance Care Planning after Lung Transplantation: A Case of Missed Opportunities. Prog Transplant 2016; 16:222-5. [PMID: 17007156 DOI: 10.1177/152692480601600306] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
After lung transplantation, recipients are regularly evaluated by the transplant team and often require multiple hospitalizations. The primary focus of care during this time is on detecting and treating complications and may not necessarily include advance care planning discussions. This focus may leave clinicians unaware of the recipient's treatment preferences and place a burden on families trying to decide whether to undergo or forgo life-sustaining treatment when the recipient's medical condition deteriorates. We report the case of a woman with bronchiolitis obliterans who was admitted to the transplant center 37 times and died in the intensive care unit. Although progressive deterioration of her medical condition was well documented, her medical records revealed no evidence of advance care planning discussions with the patient and family. Incorporating timely advance care planning and integrating palliative care in the ongoing posttransplant clinical management may benefit patients, families, and clinicians as recipients approach the final stage of their illness.
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Affiliation(s)
- Mi-Kyung Song
- Department of Acute & Tertiary Care, School of Nursing, University of Pittsburgh, PA, USA
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Jonigk D, Izykowski N, Rische J, Braubach P, Kühnel M, Warnecke G, Lippmann T, Kreipe H, Haverich A, Welte T, Gottlieb J, Laenger F. Molecular Profiling in Lung Biopsies of Human Pulmonary Allografts to Predict Chronic Lung Allograft Dysfunction. THE AMERICAN JOURNAL OF PATHOLOGY 2015; 185:3178-88. [PMID: 26476349 DOI: 10.1016/j.ajpath.2015.08.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/03/2015] [Accepted: 08/28/2015] [Indexed: 10/22/2022]
Abstract
Chronic lung allograft dysfunction (CLAD) is the main reason for poor long-term outcome of lung transplantation, with bronchiolitis obliterans (BO) representing the predominant pathological feature. BO is defined as a progressive fibrous obliteration of the small airways, thought to be triggered by a combination of nonimmune bronchial injury and alloimmune and autoimmune mechanisms. Because biopsy samples are too insensitive to reliably detect BO and a decline in lung function test results, which is clinically used to define CLAD, does not detect early stages, there is need for alternative biomarkers for early diagnosis. Herein, we analyzed the cellular composition and differential expression of 45 tissue remodeling-associated genes in transbronchial lung biopsy specimens from two cohorts with 18 patients each: patients who did not develop CLAD within 3 years after transplantation (48 biopsy specimens) and patients rapidly developing CLAD within the first 3 postoperative years (57 biopsy specimens). Integrating the mRNA expression levels of the five most significantly dysregulated genes from the transforming growth factor-β axis (BMP4, IL6, MMP1, SMAD1, and THBS1) into a score, patient groups could be confidently separated and the outcome predicted (P < 0.001). We conclude that overexpression of fibrosis-associated genes may be valuable as a tissue-based molecular biomarker to more accurately diagnose or predict the development of CLAD.
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Affiliation(s)
- Danny Jonigk
- Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany.
| | - Nicole Izykowski
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Johanna Rische
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Peter Braubach
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Mark Kühnel
- Institute of Functional and Applied Anatomy, Hanover Medical School, Hanover, Germany
| | - Gregor Warnecke
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany
| | - Torsten Lippmann
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Hans Kreipe
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Axel Haverich
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany
| | - Tobias Welte
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany
| | - Jens Gottlieb
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany
| | - Florian Laenger
- Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany
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8
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Abstract
COPD is characterized by airflow limitation that is not fully reversible. The morphological basis for airflow obstruction results from a varying combination of obstructive changes in peripheral conducting airways and destructive changes in respiratory bronchioles, alveolar ducts, and alveoli. A reduction of vascularity within the alveolar septa has been reported in emphysema. Typical physiological changes reflect these structural abnormalities. Spirometry documents airflow obstruction when the FEV1/FVC ratio is reduced below the lower limit of normality, although in early disease stages FEV1 and airway conductance are not affected. Current guidelines recommend testing for bronchoreversibility at least once and the postbronchodilator FEV1/FVC be used for COPD diagnosis; the nature of bronchodilator response remains controversial, however. One major functional consequence of altered lung mechanics is lung hyperinflation. FRC may increase as a result of static or dynamic mechanisms, or both. The link between dynamic lung hyperinflation and expiratory flow limitation during tidal breathing has been demonstrated. Hyperinflation may increase the load on inspiratory muscles, with resulting length adaptation of diaphragm. Reduction of exercise tolerance is frequently noted, with compelling evidence that breathlessness and altered lung mechanics play a major role. Lung function measurements have been traditionally used as prognostic indices and to monitor disease progression; FEV1 has been most widely used. An increase in FVC is also considered as proof of bronchodilatation. Decades of work has provided insight into the histological, functional, and biological features of COPD. This has provided a clearer understanding of important pathobiological processes and has provided additional therapeutic options.
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Bessonneau V, Bojko B, Azad A, Keshavjee S, Azad S, Pawliszyn J. Determination of bronchoalveolar lavage bile acids by solid phase microextraction liquid chromatography–tandem mass spectrometry in combination with metabolite profiling: Comparison with enzymatic assay. J Chromatogr A 2014; 1367:33-8. [DOI: 10.1016/j.chroma.2014.09.061] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 09/19/2014] [Accepted: 09/23/2014] [Indexed: 10/24/2022]
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10
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Affiliation(s)
- Alan F Barker
- From the Division of Pulmonary and Critical Care, Department of Medicine, Oregon Health and Science University, Portland (A.F.B.); Service de Pneumologie; Assistance Publique-Hôpitaux de Paris, Hôpital Saint Louis, Paris (A.B.); Division of Pulmonary and Critical Care Medicine, Department of Medicine, New York University School of Medicine, New York (W.N.R.); and Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Minnesota, Minneapolis (M.I.H.)
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11
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Moermans C, Poulet C, Henket M, Bonnet C, Willems E, Baron F, Beguin Y, Louis R. Lung function and airway inflammation monitoring after hematopoietic stem cell transplantation. Respir Med 2013; 107:2071-80. [DOI: 10.1016/j.rmed.2013.10.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 09/20/2013] [Accepted: 10/08/2013] [Indexed: 10/26/2022]
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12
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Weigt SS, DerHovanessian A, Wallace WD, Lynch JP, Belperio JA. Bronchiolitis obliterans syndrome: the Achilles' heel of lung transplantation. Semin Respir Crit Care Med 2013; 34:336-51. [PMID: 23821508 PMCID: PMC4768744 DOI: 10.1055/s-0033-1348467] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Lung transplantation is a therapeutic option for patients with end-stage pulmonary disorders. Unfortunately, chronic lung allograft dysfunction (CLAD), most commonly manifest as bronchiolitis obliterans syndrome (BOS), continues to be highly prevalent and is the major limitation to long-term survival. The pathogenesis of BOS is complex and involves alloimmune and nonalloimmune pathways. Clinically, BOS manifests as airway obstruction and dyspnea that are classically progressive and ultimately fatal; however, the course is highly variable, and distinguishable phenotypes may exist. There are few controlled studies assessing treatment efficacy, but only a minority of patients respond to current treatment modalities. Ultimately, preventive strategies may prove more effective at prolonging survival after lung transplantation, but their remains considerable debate and little data regarding the best strategies to prevent BOS. A better understanding of the risk factors and their relationship to the pathological mechanisms of chronic lung allograft rejection should lead to better pharmacological targets to prevent or treat this syndrome.
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Affiliation(s)
- S Samuel Weigt
- Division of Pulmonary, Critical Care Medicine, Allergy, and Clinical Immunology, Department of Internal Medicine, The David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095, USA.
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13
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Detection of human cytomegalovirus in transbronchial biopsies from lung transplant recipients. Arch Virol 2013; 158:1461-5. [DOI: 10.1007/s00705-013-1607-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
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14
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Mousa HM, Woodley FW. Gastroesophageal reflux in cystic fibrosis: current understandings of mechanisms and management. Curr Gastroenterol Rep 2012; 14:226-235. [PMID: 22528661 DOI: 10.1007/s11894-012-0261-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Cystic fibrosis (CF) is an inherited disease that affects both the lungs and the digestive system in children and adults. Thick mucus fills the gut and blocks lumens of the pancreas and hepatobiliary systems, creating insufficient pancreas function and liver disease. Chronic gastrointestinal (GI) complications, including intestinal obstruction, occur in neonates, and poor digestion and gastroesophageal reflux disease (GERD) in children. Although GI symptoms tend to improve with age, CF and associated GERD eventually create respiratory insufficiency; the only available treatment option at this stage is a bilateral lung transplant, which carries considerable morbidity and mortality. While GERD may reoccur as a complication of lung transplantation, GERD symptoms are often reduced following a fundoplication.
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Affiliation(s)
- Hayat M Mousa
- Center for Advanced Research in Neuromuscular Gastrointestinal Disorders, The Ohio State University, Nationwide Children's Hospital, Columbus, OH 43205, USA.
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15
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Huppmann P, Neurohr C, Leuschner S, Leuchte H, Baumgartner R, Zimmermann G, Meis T, von Wulffen W, Überfuhr P, Hatz R, Frey L, Behr J. The Munich-LTX-Score: predictor for survival after lung transplantation. Clin Transplant 2011; 26:173-83. [DOI: 10.1111/j.1399-0012.2011.01573.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Hayes D. A review of bronchiolitis obliterans syndrome and therapeutic strategies. J Cardiothorac Surg 2011; 6:92. [PMID: 21767391 PMCID: PMC3162889 DOI: 10.1186/1749-8090-6-92] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 07/18/2011] [Indexed: 11/16/2022] Open
Abstract
Lung transplantation is an important treatment option for patients with advanced lung disease. Survival rates for lung transplant recipients have improved; however, the major obstacle limiting better survival is bronchiolitis obliterans syndrome (BOS). In the last decade, survival after lung retransplantation has improved for transplant recipients with BOS. This manuscript reviews BOS along with the current therapeutic strategies, including recent outcomes for lung retransplantation.
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Affiliation(s)
- Don Hayes
- The Ohio State University Columbus, OH, USA.
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17
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Verleden G, Vos R, De Vleeschauwer S, Verleden S, Dupont L, Nevens F, Verbeken E, Vanaudenaerde B. Neutrophilic Reversible Airways Dysfunction After Liver Transplantation: A Case Report. Transplant Proc 2011; 43:2078-81. [DOI: 10.1016/j.transproceed.2011.02.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Accepted: 02/07/2011] [Indexed: 11/28/2022]
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Abstract
Lung transplantation is an effective treatment option for select patients with a variety of end-stage lung diseases. Although transplant can significantly improve the quality of life and prolong survival, a myriad of pulmonary complications may result in significant morbidity and limit long-term survival. The recognition and early treatment of these complications is important for optimizing outcomes. This article provides an overview and update of the pulmonary complications that may be commonly encountered by pulmonologists caring for these patients.
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Affiliation(s)
- Shahzad Ahmad
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, VA
| | - Oksana A Shlobin
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, VA
| | - Steven D Nathan
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, VA.
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Aerosolized tacrolimus: a case report in a lung transplant recipient. Transplant Proc 2011; 42:3876-9. [PMID: 21094875 DOI: 10.1016/j.transproceed.2010.08.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Accepted: 08/11/2010] [Indexed: 01/17/2023]
Abstract
Long-term outcomes after lung transplantation remain poor mainly to the development of bronchiolitis obliterans syndrome (BOS). Currently, treatment options for BOS are very limited. Strategies to prevent and treat this complication include the use of aerosolized therapy with only cyclosporine used in patients to date. We describe the use of aerosolized tacrolimus in a lung transplant recipient with BOS. The patient demonstrated clinical improvement in functional capacity and oxygenation while receiving tacrolimus by nebulization. Further research is needed to study whether aerosolized tacrolimus is beneficial in lung transplant recipients with BOS.
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Effects of Azithromycin in bronchiolitis obliterans syndrome after hematopoietic SCT—a randomized double-blinded placebo-controlled study. Bone Marrow Transplant 2011; 46:1551-6. [DOI: 10.1038/bmt.2011.1] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Mertens V, Blondeau K, Van Oudenhove L, Vanaudenaerde B, Vos R, Farre R, Pauwels A, Verleden G, Van Raemdonck D, Sifrim D, Dupont LJ. Bile acids aspiration reduces survival in lung transplant recipients with BOS despite azithromycin. Am J Transplant 2011; 11:329-35. [PMID: 21272237 DOI: 10.1111/j.1600-6143.2010.03380.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Azithromycin (AZM) improved bronchiolitis obliterans syndrome (BOS) and reduced aspiration in lung transplant (LTx) recipients. We hypothesize that AZM could improve graft and overall survival more efficiently in LTx patients with BOS who have bile acid (BA) aspiration by protecting against the aspiration-induced progression of BOS. The goal was to compare FEV(1) (% baseline), BOS progression and overall survival in LTx recipients treated with AZM for BOS, both with versus without BA aspiration. Therefore, LTx recipients treated with AZM for BOS were recruited and broncho-alveolar lavage (BAL) samples were analyzed for the presence of BA and neutrophilia before the start of AZM treatment. Short-term effect of AZM on FEV(1) and BAL neutrophilia was assessed, progression of BOS and survival were followed-up for 3 years and results were compared between patients with/without BA aspiration. 19/37 LTx patients had BA in BAL. BA aspiration predisposed to a significantly worse outcome, in terms of decline in FEV(1) , progression of BOS ≥ 1 and survival. AZM does not seem to protect against the long-term allograft dysfunction caused by gastroesophageal reflux (GER) and aspiration and an additional treatment targeting aspiration may be indicated in those LTx patients.
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Affiliation(s)
- V Mertens
- Center for Gastroenterological Research, KULeuven, Belgium Laboratory of Pneumology, KULeuven, Belgium
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Nakajima T, Palchevsky V, Perkins DL, Belperio JA, Finn PW. Lung transplantation: infection, inflammation, and the microbiome. Semin Immunopathol 2011; 33:135-56. [DOI: 10.1007/s00281-011-0249-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 01/12/2011] [Indexed: 12/29/2022]
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Zheng C, Kane TD, Kurland G, Irlano K, Spahr J, Potoka DA, Weardon PD, Morell VO. Feasibility of laparoscopic Nissen fundoplication after pediatric lung or heart–lung transplantation: should this be the standard? Surg Endosc 2010; 25:249-54. [DOI: 10.1007/s00464-010-1167-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 05/23/2010] [Indexed: 10/19/2022]
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Abstract
Lung transplantation is well-established in the treatment of end-stage lung disease in children. Our understanding of the problems associated with transplantation has increased rapidly over the past 25 years. Recent figures suggest this knowledge is starting to translate into improvements in management and survival. The common indications for lung transplantation in children, the process of assessment and the outcomes and complications of transplantation are reviewed. We discuss briefly some of the ethical issues relevant to lung transplantation and review strategies for the future. This information may help the respiratory paediatrician prepare potential candidates and their families for the process of assessment and help him or her anticipate common problems that may occur.
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Affiliation(s)
- Gary M Doherty
- Department of Paediatric Respiratory Medicine, Kings College Hospital, Great Ormond Street Hospital for Children, London WC1N 3JH
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26
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Molina EJ, Short S, Monteiro G, Gaughan JP, Macha M. Symptomatic gastroesophageal reflux disease after lung transplantation. Gen Thorac Cardiovasc Surg 2009; 57:647-53. [DOI: 10.1007/s11748-009-0486-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Accepted: 05/21/2009] [Indexed: 01/04/2023]
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Bronchiolitis obliterans syndrome after allogeneic hematopoietic stem cell transplantation-an increasingly recognized manifestation of chronic graft-versus-host disease. Biol Blood Marrow Transplant 2009; 16:S106-14. [PMID: 19896545 DOI: 10.1016/j.bbmt.2009.11.002] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Bronchiolitis obliterans syndrome (BOS) is a progressive, insidious, and often fatal lung alloreaction that can occur following allogeneic hematopoietic stem cell transplantation (HSCT) or allogeneic lung transplantation. Current estimates in the literature suggest that approximately 2% to 3% of all allogeneic HSCT recipients and 6% of patients who develop chronic graft-versus-host disease (cGVHD) will develop this syndrome. However, based on newer data it is likely that the true incidence of BOS is higher. Unfortunately, the survival and treatment of patients with BOS after HSCT has not improved over the last 20 years. Attempts at clinical trials have been hindered by the lack of uniform diagnostic criteria and inability to detect the syndrome at a reversible stage in its natural history. Recently, the National Institutes of Health (NIH) consensus project for criteria in cGVHD has made recommendations regarding the diagnosis of BOS and monitoring of lung disease among long-term survivors. Although a rare and poorly understood manifestation of cGVHD, BOS occurs commonly after lung transplantation and is similar in pathology, clinical presentation, radiographic presentation, and presumed immunologic pathogenesis. This review describes the current understanding of the epidemiology and pathogenesis of BOS and presents information on evaluations and therapies for patients with BOS after HSCT.
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Verleden GM, Vos R, De Vleeschauwer SI, Willems-Widyastuti A, Verleden SE, Dupont LJ, Van Raemdonck DE, Vanaudenaerde BM. Obliterative bronchiolitis following lung transplantation: from old to new concepts? Transpl Int 2009; 22:771-9. [DOI: 10.1111/j.1432-2277.2009.00872.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Bronchiolitis Obliterans Syndrome Is Associated With Absence of Suppression of Peripheral Blood Th1 Proinflammatory Cytokines. Transplantation 2009; 88:211-8. [DOI: 10.1097/tp.0b013e3181ac170f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Efficacy of Total Lymphoid Irradiation in Azithromycin Nonresponsive Chronic Allograft Rejection After Lung Transplantation. Transplant Proc 2009; 41:1816-20. [DOI: 10.1016/j.transproceed.2009.03.070] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Revised: 01/28/2009] [Accepted: 03/10/2009] [Indexed: 11/19/2022]
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Inducible costimulator blockade prolongs airway luminal patency in a mouse model of obliterative bronchiolitis. Transplantation 2008; 86:1436-44. [PMID: 19034015 DOI: 10.1097/tp.0b013e3181886baa] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND In human lung transplantation, chronic rejection is accompanied by obliterative bronchiolitis (OB), a fibrosing inflammatory condition that leads to occlusion of the bronchial lumen and graft failure. The pathogenesis of this disorder is poorly understood, but likely involves antigen presentation by dendritic cells (DC). We studied the presence and activation status of DCs in transplanted tracheas in a mouse model of OB and studied the effect on graft luminal patency of blocking the costimulatory B7RP-1/inducible costimulator (ICOS) pathway. METHODS Tracheas from Balb/C or from C57Bl/6 mice were transplanted heterotopically under the dorsal skin of C57Bl/6 mice. Histologic, fluorescence-activated cell sorter, and quantitative-polymerase chain reaction analyses were performed after 1, 2, or 4 weeks. In some groups, treatment with blocking rat anti-mICOS antibodies or irrelevant rat immunoglobulin G was administered during the entire observation period. RESULTS After heterotopic transplantation, both CD103+CD11b- and CD103- CD11b+ MHC II+ DCs accumulated in the airway epithelium as early as 1 week after allogeneic (mismatched) but not syngeneic (matched) transplantation. Four weeks after Tx, infiltration with CD11c+ MHCII+ DCs and CD8+ lymphocytes, luminal fibrosis and epithelial damage were more pronounced in the allogeneic than in the syngeneic setting. There was a 10-fold up-regulation of ICOS mRNA and of chemokines involved in T-cell influx in the mismatched setting compared with the matched setting. Strikingly, anti-ICOS treatment without other immunosuppression prevented luminal fibrosis in mismatched transplants. CONCLUSIONS Our results suggest that early infiltration by DC occurs in posttransplant OB. Blocking critical costimulatory molecules expressed on DCs, as in the B7RP1-ICOS pathway, prevents epithelial damage and luminal fibrosis.
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Popcorn lung and bronchiolitis obliterans: a critical appraisal. Int Arch Occup Environ Health 2008; 82:407-16. [DOI: 10.1007/s00420-008-0337-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2007] [Accepted: 05/29/2008] [Indexed: 12/14/2022]
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Song MK, De Vito Dabbs A, Studer SM, Zangle SE. Course of Illness after the Onset of Chronic Rejection in Lung Transplant Recipients. Am J Crit Care 2008. [DOI: 10.4037/ajcc2008.17.3.246] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Background Despite the overall negative impact of chronic rejection on quality of life and survival after lung transplant, the specific clinical indicators of deterioration have not been identified.
Objectives To describe the course of illness after the onset of chronic rejection, including demographic and transplant variables, morbidity, mortality, health resource utilization, and end-of-life care, and to identify clinical indicators of deterioration in health and limited survival after the onset of chronic rejection.
Methods The medical records of 311 recipients of lung transplants between 1998 and 2004 were reviewed retrospectively to identify 60 recipients who experienced chronic rejection.
Results Median survival after chronic rejection was 31.34 months. Time to rejection (mean, 26.05 months; SD, 16.85) was significantly correlated with overall survival without need of a retransplant (r = 0.64; P < .001). The earlier the onset of chronic rejection or the need for oxygen at home, the shorter was the period of survival after chronic rejection and the more frequent were hospital and intensive care unit admissions and prolonged stays. Of the 26 recipients who died, 65% died at the transplant center, and all but 1 died in the intensive care unit; 3 died after multiple attempts of cardiopulmonary resuscitation; life support was ultimately withdrawn in 69%.
Conclusions Lung transplant recipients who experience chronic graft rejection have high rates of morbidity, mortality, and health resource utilization; however, the course of illness after chronic rejection is highly variable.
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Affiliation(s)
- Mi-Kyung Song
- Mi-Kyung Song is an assistant professor in the School of Nursing at the University of North Carolina, Chapel Hill
| | - Annette De Vito Dabbs
- Annette De Vito Dabbs is an assistant professor in the Department of Acute and Tertiary Care, University of Pittsburgh School of Nursing, Pittsburgh, Pennsylvania
| | - Sean M. Studer
- Sean M. Studer is an assistant professor in the Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine
| | - Sarah E. Zangle
- Sarah E. Zangle is staff nurse in the emergency department, Children’s Hospital of the University of Pittsburgh Medical Center
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Walters EH, Reid D, Soltani A, Ward C. Angiogenesis: a potentially critical part of remodelling in chronic airway diseases? Pharmacol Ther 2008; 118:128-37. [PMID: 18358536 DOI: 10.1016/j.pharmthera.2008.01.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Accepted: 01/25/2008] [Indexed: 01/28/2023]
Abstract
Angiogenesis is a prominent feature of the structural tissue remodelling that occurs in the chronic airway diseases of asthma, Bronchiolitis Obliterans Syndrome (BOS, post-lung transplantation), and in smoking-related Chronic Obstructive Pulmonary Disease (COPD). For each, we have explored the relationship between angiogenesis and underlying chronic inflammatory processes--are the hypervascular changes secondary to inflammation, or do they occur in parallel? What are the likely growth factors which stimulate the angiogenic process? We discuss the relationships that have been studied between angiogenesis and the physiological impairment of airflow obstruction. The pattern that emerges is complex and variable. In asthma, there is strong evidence to suggest that Vascular Endothelial Growth Factor (VEGF) and its receptor system is upregulated in the airway. Local production of VEGF has also been implicated as a major driver of angiogenesis in the airway component of COPD, though paradoxically emphysema seems to be due to lack of VEGF in the lung parenchyma. In BOS, the evidence suggests that VEGF is lacking in the airway: other mediators and especially C-X-C chemokines such as Interleukin (IL)-8, are likely to be more important in angiogenesis. The physiological consequences of angiogenesis are likely to be important in asthma (especially during acute episodes of deterioration), and probably also in COPD, although data is equivocal. In BOS, increased airway vascularity appears to occur early, but is not progressive. In terms of therapy, evidence for anti-angiogenic effectiveness is strongest for Inhaled Corticosteroid (ICS) and Long Acting Beta-Agonists (LABA) in asthma.
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Affiliation(s)
- Eugene Haydn Walters
- Respiratory Research Group, Menzies Research Institute, University of Tasmania, Australia.
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Synthèse : Nouveautés dans le syndrome de bronchiolite oblitérante (Bronchiolite Obliterans Syndrome ou BOS). Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)74856-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bonatti H, Achem SR, Hinder RA. Impact of changing epidemiology of gastroesophageal reflux disease on its diagnosis and treatment. J Gastrointest Surg 2008; 12:373-81. [PMID: 17846850 DOI: 10.1007/s11605-007-0294-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Gastroesophageal reflux disease (GERD) has emerged as one of the most common diseases in modern civilization. This article reviews selected changes in epidemiology of GERD during the past decade and provides information on treatment options with a focus on the impact of GERD and potential role of laparoscopic antireflux surgery in patients with diabetes mellitus, obesity, liver cirrhosis, at the extremes of life age and in immunocompromised individuals such as liver and lung transplant recipients.
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Affiliation(s)
- Hugo Bonatti
- Department of Surgery, Mayo Clinic Jacksonville, Jacksonville, FL 32224, USA
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Lung Transplantation. MEDICAL RADIOLOGY 2008. [PMCID: PMC7121738 DOI: 10.1007/978-3-540-68218-9_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The first human lung transplantation (LuTX) was performed by Dr James Hardy (Hardy et al. 1963) in June 1960 at the University of Mississippi in a patient with unresectable lung cancer and obstructive pneumonitis. The patient received immunosuppression with azathioprine (Aza) and irradiation, but he died due to renal failure after 17 days.
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Verleden G. The role of BAL in lung transplantation. REVISTA PORTUGUESA DE PNEUMOLOGIA 2007. [DOI: 10.1016/s0873-2159(15)30405-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Abstract
Bronchiolocentric fibrosis is essentially represented by the pathological pattern of constrictive fibrotic bronchiolitis obliterans. The corresponding clinical condition (obliterative bronchiolitis) is characterised by dyspnoea, airflow obstruction at lung function testing and air trapping with characteristic mosaic features on expiratory high resolution CT scans. Bronchiolitis obliterans may result from many causes including acute diffuse bronchiolar damage after inhalation of toxic gases or fumes, alloimmune chronic processes after lung or haematopoietic stem cell transplantation, or connective tissue disease (especially rheumatoid arthritis). Airway-centred interstitial fibrosis and bronchiolar metaplasia are other features of bronchiolocentric fibrosis.
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Affiliation(s)
- Jean-François Cordier
- Claude Bernard University and Department of Respiratory Medicine, Reference Center for Orphan Pulmonary Diseases, Louis Pradel University Hospital, 69677 Lyon (Bron), France.
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Eleven years on: a clinical update of key areas of the 1996 lung allograft rejection working formulation. J Heart Lung Transplant 2007; 26:423-30. [PMID: 17449409 DOI: 10.1016/j.healun.2007.01.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2006] [Revised: 01/22/2007] [Accepted: 01/30/2007] [Indexed: 10/23/2022] Open
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Mankidy B, Kesavan RB, Silay YS, Haddad TJ, Seethamraju H. Emerging drugs in lung transplantation. Expert Opin Emerg Drugs 2007; 12:61-73. [PMID: 17355214 DOI: 10.1517/14728214.12.1.61] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The balance between immunosuppression to ensure graft tolerance while preventing emergence of infectious complications is key in lung transplantation. Although opportunistic infection may appear to be the most important of these complications, malignancies and severe drug toxicities significantly affect the short- and long-term outcomes of the patients. The present practice is combination therapy using drugs with complementary immunosuppressive action, to achieve synergistic immunosuppression with the lowest possible toxicity. Components of immunosuppression include induction and maintenance regimens. Primary graft failure remains an important cause of mortality and morbidity in the immediate post-transplant period. Acute rejection is a common complication after lung transplant, but responds well to augmented immunosuppression and immunomodulation. Chronic rejection still is the major cause of mortality in patients who survive the initial year post-transplantation. Several new drugs have shown promise in decreasing the rate of loss of graft function. This review discusses the current and emerging therapeutic regimens.
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Affiliation(s)
- Babith Mankidy
- Baylor College of Medicine, Department of Medicine, Pulmonary and Critical Care, Lung transplant program, Houston, Texas, USA
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Song MK, De Vito Dabbs A. Advance care planning after lung transplantation: a case of missed opportunities. Prog Transplant 2006. [DOI: 10.7182/prtr.16.3.m77713njx640h307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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45
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Bonatti H, Ferguson D, Wykypiel H, Aranda-Michel J, Achem SR, Hinder RA, DeVault K. Review on extraesophageal reflux disease. Eur Surg 2006. [DOI: 10.1007/s10353-006-0262-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Crowley S, Egan JJ. Macrolide antibiotics and bronchiolitis obliterans following lung transplantation. Expert Rev Anti Infect Ther 2006; 3:923-30. [PMID: 16307505 DOI: 10.1586/14787210.3.6.923] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The anti-inflammatory effects of macrolide antibiotics are of emerging importance. Over the past 20 years, chronic inflammatory respiratory conditions, including diffuse panbronchiolitis, cystic fibrosis and asthma have benefited from long-term low-dose macrolide therapy. Obliterative bronchiolitis, a form of chronic allograft dysfunction in lung transplant recipients, has been reported to be a condition in which macrolide therapy may be indicated. A number of recent cohort studies have been encouraging. Disease progression was delayed with macrolide antibiotic therapy as patients showed a sustained improvement in pulmonary function tests. Up to now, obliterative bronchiolitis has been resistant to most forms of proposed treatment. This review aims to highlight the etiology of obliterative bronchiolitis, the mechanisms of immunomodulation associated with macrolide therapy and how macrolide therapy may be effective by way of these possible mechanisms.
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Affiliation(s)
- Seamus Crowley
- Mater Misericordiae University Hospital, University College Dublin, Dublin 7, Ireland
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Abstract
The lung is an anatomically complex vital organ whose normal physiology depends on actively regulated ventilation and perfusion, and maintenance of a delicate blood-air barrier over a huge surface area in direct contact with a potentially hostile environment. Despite significant progress over the past 25 years, both short- and long-term outcomes remain significantly inferior for lung recipients relative to other "solid" organs. This review summarizes the current status of lung transplantation so as to frame the principle challenges currently facing end-stage lung-failure patients and the practitioners who care for them.
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Affiliation(s)
- Richard N Pierson
- Division of Cardiac Surgery, Department of Surgery, University of Maryland and Baltimore VAMC, Baltimore, MD, USA.
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Van Raemdonck D, Klepetko W, Verleden GM, Daenen W, Coosemans W, Decker G, De Leyn P, Nafteux P, Lerut T. [Surgical aspects of (cardio) pulmonary transplantation]. Rev Mal Respir 2005; 22:785-95. [PMID: 16272981 DOI: 10.1016/s0761-8425(05)85636-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
UNLABELLED INTRODUCTION AND STATE OF THE ART: Both short and long-term outcomes following lung transplantation have improved substantially in recent years as a result of advances in the selection and management of donors, organ preservation, immunosuppressive therapy, and the treatment of infectious and malignant complications. In addition surgical techniques have evolved over time and have contributed to this increase in success rates. PERSPECTIVES AND CONCLUSIONS This review outlines surgical aspects of lung transplantation including a historical note, techniques of lung harvesting, some anaesthetic considerations, the different transplant types and incisions, as well as anastomotic techniques and their pitfalls.
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Affiliation(s)
- D Van Raemdonck
- Département de Chirurgie Thoracique, Hôpital Universitaire de Leuven, Belgique.
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Ward C, Forrest IA, Brownlee IA, Johnson GE, Murphy DM, Pearson JP, Dark JH, Corris PA. Pepsin like activity in bronchoalveolar lavage fluid is suggestive of gastric aspiration in lung allografts. Thorax 2005; 60:872-4. [PMID: 16055614 PMCID: PMC1747219 DOI: 10.1136/thx.2004.036426] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND A biologically plausible link between gastro-oesophageal reflux (GOR), aspiration, and lung allograft dysfunction has been suggested, but there is no systematic evidence indicating the presence of gastric contents in the lung. We have tested the hypothesis that pepsin, as a marker of aspiration, is detectable in bronchoalveolar lavage (BAL) fluid of allograft recipients who had not reported symptoms of GOR. METHODS Standardised 3 x 60 ml surveillance BAL fluid samples from 13 chronologically sequential stable lung allograft recipients without chronic rejection (10 patients treated with a prophylactic proton pump inhibitor) were studied. Lavage supernatants were assayed by an ELISA based on a monospecific goat antibody for pepsin/pepsinogen. Pepsin levels were compared with those from four normal volunteer controls. RESULTS Pepsin levels were measurable in all allograft recipients, in keeping with gastric aspiration (median 109 ng/ml (range 35-1375)). In the control group the pepsin levels were below the limit of detection. Treatment with a proton pump inhibitor was not correlated with pepsin levels. There was no correlation between BAL fluid neutrophils and pepsin levels. CONCLUSION These data demonstrate lung epithelial lining fluid concentrations of pepsin in lung allograft recipients which are much higher than blood reference levels, with no detectable pepsin in controls. This provides direct evidence of gastric aspiration, which is potentially injurious to the allograft.
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Affiliation(s)
- C Ward
- Applied Immunobiology and Transplantation Research Group, Freeman Hospital and University of Newcastle upon Tyne, Newcastle upon Tyne NE7 7DN, UK.
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