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Kordjazy N, Amini S. A review of the therapeutic potential of the cysteinyl leukotriene antagonist Montelukast in the treatment of bronchiolitis obliterans syndrome following lung and hematopoietic-stem cell transplantation and its possible mechanisms. Ther Adv Respir Dis 2024; 18:17534666241232284. [PMID: 38504551 PMCID: PMC10953006 DOI: 10.1177/17534666241232284] [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: 06/05/2023] [Accepted: 01/26/2024] [Indexed: 03/21/2024] Open
Abstract
Lung and hematopoietic stem cell transplantation are therapeutic modalities in chronic pulmonary and hematological diseases, respectively. One of the complications in these patients is the development of bronchiolitis obliterans syndrome (BOS). The efficacy and safety of available treatment strategies in BOS remain a challenge. A few mechanisms have been recognized for BOS in lung transplant and graft-versus-host disease (GVHD) patients involving the TH-1 and TH-2 cells, NF-kappa B, TGF-b, several cytokines and chemokines, and cysteinyl leukotrienes (CysLT). Montelukast is a highly selective CysLT receptor antagonist that has been demonstrated to exert anti-inflammatory and anti-fibrotic effects in abundant experiments. One area of interest for the use of montelukast is lung transplants or GVHD-associated BOS. Herein, we briefly review data regarding the mechanisms involved in BOS development and montelukast administration as a treatment modality for BOS, and finally, the possible relationship between CysLTs antagonism and BOS improvement will be discussed.
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Affiliation(s)
- Nastaran Kordjazy
- Department of Clinical Pharmacy, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahideh Amini
- Rajaei Cardiovascular Medical and Research Institute, Valiasr Ave-Niyayesh Intersection, Tehran 199561-14331, Iran
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Wang Z. Role of transforming growth factor-β in airway remodelling in bronchiolitis obliterans. Growth Factors 2023; 41:192-209. [PMID: 37487145 DOI: 10.1080/08977194.2023.2239356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 07/12/2023] [Indexed: 07/26/2023]
Abstract
Airway remodelling is the main pathological mechanism of bronchiolitis obliterans (BO). Several studies have found that transforming growth factor-β (TGF-β) expression is increased in BO during airway remodelling, where it plays an important role in various biological processes by binding to its receptor complex to activate multiple signalling proteins and pathways. This review examines the role of TGF-β in airway remodelling in BO and its potential as a therapeutic target, highlighting the mechanisms of TGF-β activation and signalling, cellular targets of TGF-β actions, and research progress in TGF-β signalling and TGF-β-mediated processes.
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Affiliation(s)
- Ziwei Wang
- Department of Pediatrics, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Pham J, Rangaswamy J, Avery S, Borg B, Martin C, Munsif M, Lin T, Dabscheck E. Updated prevalence, predictors and treatment outcomes for bronchiolitis obliterans syndrome after allogeneic stem cell transplantation. Respir Med 2021; 177:106286. [PMID: 33383436 DOI: 10.1016/j.rmed.2020.106286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Bronchiolitis obliterans syndrome (BOS) after allogeneic haemopoietic stem cell transplant (HSCT) is an under-recognised and difficult to treat disease. This occurs in the context of limited clinical research and inconsistent diagnostic criteria. METHOD Retrospective data was collected on 275 patients who underwent allogeneic HSCT at an Australian tertiary hospital between 2007 and 2017. The prevalence of BOS, defined by 2014 National Institute of Health criteria, as well as predictors for BOS and mortality were determined. Treatment outcomes, using serial spirometry, were compared between patients who received early versus late immunosuppression for BOS. RESULTS The prevalence of BOS was 9.1%. Myeloablative conditioning (OR: 2.7, 95%CI: 1.13-6.50, p = 0.03) and extra-pulmonary chronic graft-versus-host disease (OR 2.62, 95% CI: 1.04-6.60, p = 0.04) were associated with BOS. There was reduced median survival in the BOS group compared with the non-BOS group, but this was not statistically significant (4.1years (IQR: 2.8, 6.8) versus 4.6years (IQR: 2.4, 7.8), respectively, p = 0.33). The vast majority (87.5%) of BOS patients failed to attain improvement in FEV1 at 12 months, regardless of treatment strategy. Patients who underwent a late immunosuppression strategy had worse mean FEV1 decline compared to those who received early immunosuppression (-36.3% versus -1.6%, respectively, p = 0.03). CONCLUSION BOS is a common and progressive disease following HSCT and is largely refractory to current treatment strategies. Compared to late immunosuppression, early augmentation of immunosuppression may slow lung function deterioration in the short term. However, further research is urgently needed to identify effective prevention and treatment strategies for BOS.
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Iacono A, Wijesinha M, Rajagopal K, Murdock N, Timofte I, Griffith B, Terrin M. A randomised single-centre trial of inhaled liposomal cyclosporine for bronchiolitis obliterans syndrome post-lung transplantation. ERJ Open Res 2019; 5:00167-2019. [PMID: 31687370 PMCID: PMC6819986 DOI: 10.1183/23120541.00167-2019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 08/25/2019] [Indexed: 11/07/2022] Open
Abstract
Introduction No proven treatments exist for bronchiolitis obliterans syndrome (BOS) following lung transplantation. Inhaled liposomal cyclosporine (L-CsA) may prevent BOS progression. Methods A 48-week phase IIb randomised clinical trial was conducted in 21 lung transplant patients with BOS assigned to either L-CsA with standard-of-care (SOC) oral immunosuppression (L-CsA group) or SOC (SOC-alone group). Efficacy end-points were BOS progression-free survival (defined as absence of ≥20% decline in forced expiratory volume in 1 s (FEV1) from randomisation, re-transplantation or death) and BOS grade change. Results BOS progression-free survival was 82% for L-CsA versus 50% for SOC-alone (p=0.1) and BOS grade worsened in 18% for L-CsA versus 60% for SOC-alone (p=0.05). Mean changes in ΔFEV1 and forced vital capacity, respectively, stabilised with L-CsA: +0.005 (95% CI −0.004– +0.013) and −0.005 (95% CI −0.015– +0.006) L·month−1, but worsened with SOC-alone: −0.023 (95% CI −0.033– −0.013) and −0.026 (95% CI −0.039– −0.014) L·month−1 (p<0.0001 and p=0.009). Median survival (4.1 versus 2.9 years; p=0.03) and infection rate (45% versus 60%; p=0.7) improved with L-CsA versus SOC-alone; creatinine and tacrolimus levels were similar. Conclusions L-CsA was well tolerated and stabilised lung function in lung transplant recipients affected by BOS without systemic toxicity, providing a basis for a global phase III trial using L-CsA. Liposomal aerosol cyclosporine (L-CsA) was well tolerated and stabilised lung function in lung transplant recipients affected by BOS. The data provide evidence for an ongoing global phase III trial using L-CsA for BOS.http://bit.ly/2HB8w5j
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Affiliation(s)
- Aldo Iacono
- Shock, Trauma and Transplantation and Dept of Medicine, University of Maryland, Baltimore, MD, USA
| | | | - Keshava Rajagopal
- Cardiac Surgery, Memorial Hermann Hospital Texas Medical Center, Houston, TX, USA
| | - Natalia Murdock
- Shock, Trauma and Transplantation and Dept of Medicine, University of Maryland, Baltimore, MD, USA
| | - Irina Timofte
- Shock, Trauma and Transplantation and Dept of Medicine, University of Maryland, Baltimore, MD, USA
| | - Bartley Griffith
- Dept of Cardiothoracic Surgery, University of Maryland, Baltimore, MD, USA
| | - Michael Terrin
- Dept of Epidemiology, University of Maryland, Baltimore, MD, USA
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Yang M, Chen G, Zhang X, Ding Z, Miao Y, Yang Y, Chen ZK, Jiang F, Chang S, Zhou P. A novel MyD88 inhibitor attenuates allograft rejection after heterotopic tracheal transplantation in mice. Transpl Immunol 2018; 53:1-6. [PMID: 30472390 DOI: 10.1016/j.trim.2018.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 11/21/2018] [Indexed: 01/14/2023]
Abstract
BACKGROUND After lung transplantation, the major complication limiting the long-term survival of allografts is obliterative bronchiolitis (OB), characterized by chronic rejection. Innate immune responses contribute to the development of OB. In this study, we used a murine heterotopic tracheal transplantation mouse model to examine the effects of a newtype of innate immune inhibitor, TJ-M2010-5. METHODS Syngeneic tracheal grafts were transplanted heterotopically from C57BL/6 mice to C57BL/6 mice. Allografts from BALB/c mice were transplanted to C57BL/6 mice. The allograft recipients were treated with TJ-M2010-5, and anti-mouse CD154 (MR-1). The grafts were harvested at 7, 14, and 28 days and evaluated by histological and real-time RT-PCR analyses. RESULTS In untreated allografts, almost all epithelial cells fell off at 7 days and tracheal occlusion reached a peak at 28 days. However, the loss of the epithelium and airway obstruction were significantly improved in mice treated with TJ-M2010-5 combined with MR-1. The relative mRNA expression levels of pro-inflammatory cytokines were upregulated in allogeneic tracheal grafts, and treatment with the two drugs reduced the production of pro-inflammatory cytokines and infiltration of inflammatory cells. CONCLUSIONS In heterotopic tracheal transplantation models, TJ-M2010-5 combined with MR-1 could ameliorate the development of OB.
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Affiliation(s)
- Min Yang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China
| | - Gen Chen
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xue Zhang
- Department of Breast Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Zuochuan Ding
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China
| | - Yan Miao
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China
| | - Yang Yang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China
| | - Zhonghua Klaus Chen
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China
| | - Fengchao Jiang
- Academy of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Chang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China.
| | - Ping Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan 43003, China.
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Barbosa EJM, Lanclus M, Vos W, Van Holsbeke C, De Backer W, De Backer J, Lee J. Machine Learning Algorithms Utilizing Quantitative CT Features May Predict Eventual Onset of Bronchiolitis Obliterans Syndrome After Lung Transplantation. Acad Radiol 2018; 25:1201-1212. [PMID: 29472146 DOI: 10.1016/j.acra.2018.01.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/09/2018] [Accepted: 01/10/2018] [Indexed: 11/17/2022]
Abstract
RATIONALE AND OBJECTIVES Long-term survival after lung transplantation (LTx) is limited by bronchiolitis obliterans syndrome (BOS), defined as a sustained decline in forced expiratory volume in the first second (FEV1) not explained by other causes. We assessed whether machine learning (ML) utilizing quantitative computed tomography (qCT) metrics can predict eventual development of BOS. MATERIALS AND METHODS Paired inspiratory-expiratory CT scans of 71 patients who underwent LTx were analyzed retrospectively (BOS [n = 41] versus non-BOS [n = 30]), using at least two different time points. The BOS cohort experienced a reduction in FEV1 of >10% compared to baseline FEV1 post LTx. Multifactor analysis correlated declining FEV1 with qCT features linked to acute inflammation or BOS onset. Student t test and ML were applied on baseline qCT features to identify lung transplant patients at baseline that eventually developed BOS. RESULTS The FEV1 decline in the BOS cohort correlated with an increase in the lung volume (P = .027) and in the central airway volume at functional residual capacity (P = .018), not observed in non-BOS patients, whereas the non-BOS cohort experienced a decrease in the central airway volume at total lung capacity with declining FEV1 (P = .039). Twenty-three baseline qCT parameters could significantly distinguish between non-BOS patients and eventual BOS developers (P < .05), whereas no pulmonary function testing parameters could. Using ML methods (support vector machine), we could identify BOS developers at baseline with an accuracy of 85%, using only three qCT parameters. CONCLUSIONS ML utilizing qCT could discern distinct mechanisms driving FEV1 decline in BOS and non-BOS LTx patients and predict eventual onset of BOS. This approach may become useful to optimize management of LTx patients.
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Affiliation(s)
- Eduardo J Mortani Barbosa
- Perelman School of Medicine, University of Pennsylvania, Departments of Radiology and Medicine, 3400 Spruce Street, Philadelphia, PA 19104.
| | | | - Wim Vos
- FLUIDDA nv, Kontich, Belgium
| | | | - William De Backer
- University Hospital Antwerp, Department of Respiratory Medicine, Edegem, Belgium
| | | | - James Lee
- Perelman School of Medicine, University of Pennsylvania, Departments of Radiology and Medicine, 3400 Spruce Street, Philadelphia, PA 19104
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Zhang SB, Sun X, Wu Q, Wu JP, Chen HY. Impaired Capacity of Fibroblasts to Support Airway Epithelial Progenitors in Bronchiolitis Obliterans Syndrome. Chin Med J (Engl) 2016; 129:2040-4. [PMID: 27569228 PMCID: PMC5009585 DOI: 10.4103/0366-6999.189058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Bronchiolitis obliterans syndrome (BOS) often develops in transplant patients and results in injury to the respiratory and terminal airway epithelium. Owing to its rising incidence, the pathogenesis of BOS is currently an area of intensive research. Studies have shown that injury to the respiratory epithelium results in dysregulation of epithelial repair. Airway epithelial regeneration is supported by stromal cells, including fibroblasts. This study aimed to investigate whether the supportive role of lung fibroblasts is altered in BOS. METHODS Suspensions of lung cells were prepared by enzyme digestion. Lung progenitor cells (LPCs) were separated by fluorescence-activated cell sorting. Lung fibroblasts from patients with BOS or healthy controls were mixed with sorted mouse LPCs to compare the colony-forming efficiency of LPCs by counting the number of colonies with a diameter of ≥50 μm in each culture. Statistical analyses were performed using the SPSS 17.0 software (SPSS Inc., USA). The paired Student's t-test was used to test for statistical significance. RESULTS LPCs were isolated with the surface phenotype of CD31-CD34-CD45- EpCAM+Sca-1+. The colony-forming efficiency of LPCs was significantly reduced when co-cultured with fibroblasts isolated from patients with BOS. The addition of SB431542 increased the colony-forming efficiency of LPCs to 1.8%; however, it was still significantly less than that in co-culture with healthy control fibroblasts (P < 0.05). CONCLUSION The epithelial-supportive capacity of fibroblasts is impaired in the development of BOS and suggest that inefficient repair of airway epithelium could contribute to persistent airway inflammation in BOS.
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Affiliation(s)
- Su-Bei Zhang
- Haihe Clinical College of Tianjin Medical University, Tianjin 300070, China
| | - Xin Sun
- Key Research Laboratory for Infectious Disease Prevention for State Administration of Traditional Chinese Medicine, Tianjin Institute of Respiratory Diseases, Tianjin Haihe Hospital, Tianjin 300350, China
| | - Qi Wu
- Tianjin Institute of Respiratory Diseases, Tianjin Haihe Hospital, Tianjin 300350, China
- Address for correspondence: Prof. Qi Wu, Tianjin Institute of Respiratory Diseases, Tianjin Haihe Hospital, Tianjin 300350, China E-Mail:
| | - Jun-Ping Wu
- Department of Respiratory, Tianjin Haihe Hospital, Tianjin 300350, China
| | - Huai-Yong Chen
- Department of Basic Medicine, Tianjin Haihe Hospital, Tianjin 300350, China
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9
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Xu Z, Nayak DK, Benshoff N, Hachem R, Gelman AE, Mohanakumar T. De novo-developed antibodies to donor MHC antigens lead to dysregulation of microRNAs and induction of MHC class II. THE JOURNAL OF IMMUNOLOGY 2015; 194:6133-43. [PMID: 25941328 DOI: 10.4049/jimmunol.1401848] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 04/03/2015] [Indexed: 01/09/2023]
Abstract
Immune responses to HLA and development of anti-donor HLA (DSA) were shown to play a role in chronic rejection following transplantation. We hypothesized that Abs to MHC change microRNAs (miRNAs), leading to chronic lung allograft rejection. Microarray analysis was performed in a murine model of anti-MHC-induced obliterative airway disease (OAD), a correlate of obliterative bronchiolitis. A unique profile of dysregulated miRNAs was detected in OAD mice on days 7 and 15 after Ab administration compared with control. Sixty-seven miRNAs were increased and 42 miRNAs were decreased in OAD mice on day 7. In addition, 15 miRNAs were overexpressed and 16 miRNAs were underexpressed in OAD mice on day 15. The expression of miR-16 and miR-195 was significantly decreased in lungs of OAD mice, as assessed by quantitative RT-PCR and in situ hybridization, with increases in H-2 Aa and H-2 Dma mRNA levels. Significant reductions in miR-16 and miR-195 levels were also noted in lung transplant (LTx) patients with DSA compared with LTx patients without DSA. Bioinformatic TargetScan and reporter assays identified the binding of miR-16 and miR-195 to the 3'-untranslated region of regulatory factor X 5. Quantitative PCR and immunohistochemistry indicated posttranscriptional increases in regulatory factor X 5 mRNA and protein expression in OAD mice, as well as in LTx recipients with DSA, which was associated with increased expression of HLA-DPA1, HLA-DQA1, and HLA-DRA mRNA. Therefore, our results demonstrated that miRNAs induced by alloimmunity may play important roles in chronic rejection after LTx.
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Affiliation(s)
- Zhongping Xu
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - Deepak K Nayak
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - Nicholas Benshoff
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - Ramsey Hachem
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110; and
| | - Andrew E Gelman
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - Thalachallour Mohanakumar
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110; Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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Cardiac mass and function decrease in bronchiolitis obliterans syndrome after lung transplantation: relationship to physical activity? PLoS One 2014; 9:e114001. [PMID: 25479016 PMCID: PMC4257554 DOI: 10.1371/journal.pone.0114001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 11/02/2014] [Indexed: 01/19/2023] Open
Abstract
Rationale There is a need to expand knowledge on cardio-pulmonary pathophysiology of bronchiolitis obliterans syndrome (BOS) following lung transplantation (LTx). Objectives The purpose of this study was to assess MRI-derived biventricular cardiac mass and function parameters as well as flow hemodynamics in patients with and without BOS after LTx. Methods Using 1.5T cardiac MRI, measurements of myocardial structure and function as well as measurements of flow in the main pulmonary artery and ascending aorta were performed in 56 lung transplant patients. The patients were dichotomized into two gender matched groups of comparable age range: one with BOS (BOS stages 1–3) and one without BOS (BOS 0/0p). Measurements and Main Results Significantly lower biventricular cardiac mass, right and left ventricular end-diastolic volume, biventricular stroke volume, flow hemodynamics and significant higher heart rate but preserved cardiac output were observed in patients with BOS 1–3 compared to the BOS 0/0p group (p<0.05). In a stepwise logistic regression analysis global cardiac mass (p = 0.046) and days after LTx (p = 0.0001) remained independent parameters to predict BOS. In a second model an indicator for the physical fitness level - walking number of stairs - was added to the logistic regression model. In this second model, time after LTx (p = 0.005) and physical fitness (p = 0.01) remained independent predictors for BOS. Conclusion The observed changes in biventricular cardiac mass and function as well as changes in hemodynamic flow parameters in the pulmonary trunk and ascending aorta are likely attributed to the physical fitness level of patients after lung transplantation, which in turn is strongly related to lung function.
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Abstract
Lung transplantation has become an important therapeutic option for patients with end-stage organ dysfunction; however, its clinical usefulness has been limited by the relatively early onset of chronic allograft dysfunction and progressive clinical decline. Obliterative bronchiolitis is characterized histologically by luminal fibrosis of the respiratory bronchioles and clinically by bronchiolitis obliterans syndrome (BOS) which is defined by a measured decline in lung function based on forced expiratory volume (FEV1). Since its earliest description, a number of risk factors have been associated with the development of BOS, including acute rejection, lymphocytic bronchiolitis, primary graft dysfunction, infection, donor specific antibodies, and gastroesophageal reflux disease. However, despite this broadened understanding, the pathogenesis underlying BOS remains poorly understood and once begun, there are relatively few treatment options to battle the progressive deterioration in lung function.
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Affiliation(s)
- Christine M Lin
- 1University of Colorado, Denver - Anschutz Medical Campus, 12700 East 19th Avenue, Room 9470E, Aurora, CO 80045 USA
| | - Martin R Zamora
- 2University of Colorado, Denver - Anschutz Medical Campus, 1635 Aurora Court, Room 7082, Mail Stop F749, Aurora, CO 80045 USA
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Clajus C, Blasi F, Welte T, Greer M, Fuehner T, Mantero M. Therapeutic approach to respiratory infections in lung transplantation. Pulm Pharmacol Ther 2014; 32:149-54. [PMID: 25038552 PMCID: PMC7110868 DOI: 10.1016/j.pupt.2014.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 07/09/2014] [Indexed: 01/22/2023]
Abstract
Lung transplant recipients (LTRs) are at life-long risk for infections and disseminated diseases owing to their immunocompromised state. Besides organ failure and sepsis, infection can trigger acute and chronic graft rejection which increases mortality. Medical prophylaxis and treatment are based on comprehensive diagnostic work-up including previous history of infection and airway colonisation to reduce long-term complications and mortality. Common bacterial pathogens include Pseudomonas and Staphylococcus, whilst Aspergillus and Cytomegalovirus (CMV) are respectively the commonest fungal and viral pathogens. Clinical symptoms can be various in lung transplant recipients presenting an asymptomatic to severe progress. Regular control of infection parameters, daily lung function testing and lifelong follow-up in a specialist transplant centre are mandatory for early detection of bacterial, viral and fungal infections. After transplantation each patient receives intensive training with rules of conduct concerning preventive behaviour and to recognize early signs of post transplant complications. Early detection of infection and complications are important goals to reduce major complications after lung transplantation.
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Affiliation(s)
- Carolina Clajus
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany.
| | - Francesco Blasi
- Department of Pathophysiology and Transplantation, University of Milan, IRCCS Fondazione Ospedale Maggiore, Policlinico Cà Granda Milano, Italy
| | - Tobias Welte
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
| | - Mark Greer
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
| | - Thomas Fuehner
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
| | - Marco Mantero
- Department of Pathophysiology and Transplantation, University of Milan, IRCCS Fondazione Ospedale Maggiore, Policlinico Cà Granda Milano, Italy
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Garrity ER. Gastroesophageal reflux disease and bronchiolitis obliterans syndrome: where are we today? J Heart Lung Transplant 2014; 32:579-80. [PMID: 23701850 DOI: 10.1016/j.healun.2013.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 03/26/2013] [Indexed: 12/20/2022] Open
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Tiriveedhi V, Gautam B, Sarma NJ, Askar M, Budev M, Aloush A, Hachem R, Trulock E, Myers B, Patterson AG, Mohanakumar T. Pre-transplant antibodies to Kα1 tubulin and collagen-V in lung transplantation: clinical correlations. J Heart Lung Transplant 2013; 32:807-14. [PMID: 23856218 DOI: 10.1016/j.healun.2013.06.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/30/2013] [Accepted: 06/04/2013] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Immune responses to lung-associated self-antigens (SAgs) have been implicated in chronic lung allograft rejection. The goals of this study were to determine the prevalence of pre-existing antibodies (Abs) to the SAgs in pulmonary diseases and the association between pre-existing Abs to SAgs and the development of primary graft dysfunction (PGD), donor-specific antibodies (DSA), and chronic rejection. METHODS Pre- and post-transplant sera were analyzed from 317 lung transplant (LTx) recipients between 2000 and 2011 with diagnosis of chronic obstructive disease (n = 161), idiopathic pulmonary fibrosis (IPF; n = 50), cystic fibrosis (CF; n = 55), and others (n = 51). Samples were analyzed for Abs to SAgs by enzyme-linked immunosorbent assay, and DSA and cytokines by Luminex. The clinical diagnosis of PGD and bronchiolitis obliterans syndrome (BOS) was based on International Society for Heart and Lung Transplantation guidelines. RESULTS The overall prevalence of Abs to SAgs was 22.71%, including 18% in chronic obstructive pulmonary disease (p = 0.033), 34% in IPF (p = 0.0006), 29% in CF (p = 0.0023), and 19.6% in other diagnoses (p = 0.044). The incidence of PGD (88% vs 54%, p < 0.05), DSA (70% vs 45%, p < 0.01), and BOS (90% vs 38% (p < 0.001) after LTx was significantly higher in patients with pre-LTx Abs to SAgs than without. Pro-inflammatory cytokines (interleukin-1β, interleukin-17, and interferon-γ) were elevated in patients who had pre-LTx Abs to SAgs, along with a reduction in anti-inflammatory interleukin-10. CONCLUSIONS Patients with IPF and CF have the highest prevalence of Abs to SAgs. Patients with pre-existing Abs to SAgs are at increased risk for development of PGD, DSA, and BOS. Strategies to remove pre-existing Abs to SAgs should be considered to improve lung allograft outcome.
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Angaswamy N, Tiriveedhi V, Sarma NJ, Subramanian V, Klein C, Wellen J, Shenoy S, Chapman WC, Mohanakumar T. Interplay between immune responses to HLA and non-HLA self-antigens in allograft rejection. Hum Immunol 2013; 74:1478-85. [PMID: 23876679 DOI: 10.1016/j.humimm.2013.07.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 07/09/2013] [Accepted: 07/09/2013] [Indexed: 01/02/2023]
Abstract
Recent studies strongly suggest an increasing role for immune responses against self-antigens (Ags) which are not encoded by the major histocompatibility complex in the immunopathogenesis of allograft rejection. Although, improved surgical techniques coupled with improved methods to detect and avoid sensitization against donor human leukocyte antigen (HLA) have improved the immediate and short term function of transplanted organs. However, acute and chronic rejection still remains a vexing problem for the long term function of the transplanted organ. Immediately following organ transplantation, several factors both immune and non immune mechanisms lead to the development of local inflammatory milieu which sets the stage for allograft rejection. Traditionally, development of antibodies (Abs) against mismatched donor HLA have been implicated in the development of Ab mediated rejection. However, recent studies from our laboratory and others have demonstrated that development of humoral and cellular immune responses against non-HLA self-Ags may contribute in the pathogenesis of allograft rejection. There are reports demonstrating that immune responses to self-Ags especially Abs to the self-Ags as well as cellular immune responses especially through IL17 has significant pro-fibrotic properties leading to chronic allograft failure. This review summarizes recent studies demonstrating the role for immune responses to self-Ags in allograft immunity leading to rejection as well as present recent evidence suggesting there is interplay between allo- and autoimmunity leading to allograft dysfunction.
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Affiliation(s)
- Nataraju Angaswamy
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
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The impact of viral respiratory tract infections on long-term morbidity and mortality following lung transplantation: a retrospective cohort study using a multiplex PCR panel. Transplantation 2013; 95:383-8. [PMID: 23444472 DOI: 10.1097/tp.0b013e318271d7f0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The major factor affecting morbidity and mortality after lung transplantation (LTX) is bronchiolitis obliterans syndrome. Earlier studies have suggested a connection between the presence of viral agents and morbidity in this patient group, but data are somewhat conflicting. The objective of this study was to investigate the development of bronchiolitis obliterans syndrome and graft loss after LTX in relation to the presence of respiratory viruses during the first year after LTX. METHOD The study is a retrospective cohort study of 39 LTX recipients 11Y13 years after surgery. Patients were operated between January 1, 1998 and December 31, 2000 at Sahlgrenska University Hospital. The presence of virus in bronchoalveolar lavage (BAL) fluids from patients during the first year after surgery was analyzed retrospectively using a multiplex polymerase chain reaction test capable of detecting 15 respiratory agents. The time to BOS or graft loss was analyzed in relation to the positive findings in BAL during the first year after LTX. RESULTS Patients with one or more viruses detected in BAL during the first year after transplantation demonstrated a significantly faster development of BOS (P=0.005) compared with patients with no virus detected. No significant difference in graft survival was found. CONCLUSION Our results suggest that the long-term prognosis after LTX may be negatively affected by viral respiratory tract infections during the first year after LTX.
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Tiriveedhi V, Takenaka M, Ramachandran S, Gelman AE, Subramanian V, Patterson GA, Mohanakumar T. T regulatory cells play a significant role in modulating MHC class I antibody-induced obliterative airway disease. Am J Transplant 2012; 12:2663-74. [PMID: 22822907 PMCID: PMC3459183 DOI: 10.1111/j.1600-6143.2012.04191.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The molecular mechanisms leading to the development of chronic lung allograft dysfunction following de novo development of antibodies to mismatched donor MHC remain undefined. We demonstrated that intrabronchial administration of antibodies to MHC class I resulted in induction of both innate and adaptive cellular immune responses characterized by a predominance of Th17 specific to lung associated self-antigens Kα1-tubulin and Collagen-V leading to the development of obliterative airway lesions (OAD), correlate of chronic rejection following human lung transplantation. To determine the role of regulatory T cells (Treg) in the pathogenesis of OAD, we administered anti-MHC class I to mice, in which Treg were depleted by conditional ablation of FoxP3+cells. Under this condition, we observed a threefold increase in pulmonary cellular infiltration, luminal occlusion and fibrous deposition when compared anti-MHC class I Ab administered mice maintaining FoxP3. OAD lesions were accompanied with enhanced accumulation of neutrophils along with self-antigen-specific Th17 and humoral responses. However, IL-17-blockade or adoptive transfer of Treg abrogated OAD. We conclude that Treg exerts a suppressive effect on anti-MHC induced IL-8-mediated neutrophil infiltration and innate immune responses that leads to inhibition of Th17 immune responses to lung associated self-antigens which is critical for development of OAD.
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Affiliation(s)
- V. Tiriveedhi
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - M. Takenaka
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - S. Ramachandran
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - A. E. Gelman
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - V Subramanian
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | | | - T. Mohanakumar
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
,Pathology and Immunology, Washington University School of Medicine, St Louis, MO, USA
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Takenaka M, Subramanian V, Tiriveedhi V, Phelan D, Hachem R, Trulock E, Gelman AE, Patterson GA, Hoshinaga K, Mohanakumar T. Complement activation is not required for obliterative airway disease induced by antibodies to major histocompatibility complex class I: Implications for chronic lung rejection. J Heart Lung Transplant 2012; 31:1214-22. [PMID: 22980951 DOI: 10.1016/j.healun.2012.08.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 06/13/2012] [Accepted: 08/04/2012] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND The role of non-complement activating antibodies (ncAbs) to mismatched donor human leukocyte antigen (HLA) in the pathogenesis of chronic lung rejection is not known. We used a murine model of obliterative airway disease (OAD) induced by Abs to major histocompatibility major histocompatibility complex (MHC) class I and serum from donor-specific Abs developed in human lung transplant (LTx) recipients to test the role of ncAbs in the development of OAD and bronchiolitis obliterans syndrome (BOS). METHODS Anti-MHC ncAbs were administered intrabronchially in B.10 mice or in C3 knockout (C3KO) mice. Lungs were analyzed by histopathology. Lymphocytes secreting interleukin (IL)-17, interferon-γ, or IL-10 to collagen V and K-α1 tubulin (Kα1T) were enumerated by enzyme-linked immunospot assay. Serum antibodies to collagen V and Kα1T were determined by enzyme-linked immunosorbent assay. Cytokine and growth factor expression in lungs was determined by real-time polymerase chain reaction. Donor-specific Abs from patients with BOS and control BOS-negative LTx recipients were analyzed by C1q assay. RESULTS Administration of ncAbs in B.10 mice or C3KO resulted in OAD lesions. There were significant increases in IL-17- and interferon-γ-secreting cells to collagen V and Kα1T, along with serum Abs to these antigens. There was also augmented expression of monocyte chemotactic protein-1, IL-6, IL-1β, vascular endothelial growth factor, transforming growth factor-β, and fibroblastic growth factor in mice administered ncAbs by Day 3. Among 5 LTx recipients with BOS, only 1 had C1q binding donor-specific Abs. CONCLUSION Complement activation by Abs to MHC class I is not required for development of OAD and human BOS. Therefore, anti-MHC binding to epithelial and endothelial cells can directly activate pro-fibrotic and pro-inflammatory cascades leading to immune response to self-antigens and chronic rejection.
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Affiliation(s)
- Masashi Takenaka
- Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
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Antibodies to MHC class II molecules induce autoimmunity: critical role for macrophages in the immunopathogenesis of obliterative airway disease. PLoS One 2012; 7:e42370. [PMID: 22900015 PMCID: PMC3416847 DOI: 10.1371/journal.pone.0042370] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 07/05/2012] [Indexed: 01/06/2023] Open
Abstract
Previous studies have shown that intrabronchial administration of antibodies (Abs) to MHC class I resulted in development of obliterative airway disease (OAD), a correlate of chronic human lung allograft rejection. Since development of Abs specific to mismatched donor HLA class II have also been associated with chronic human lung allograft rejection, we analyzed the role of Abs to MHC class II in inducing OAD. Administration of MHC class II Abs (M5/114) to C57BL/6 mice induced the classical features of OAD even though MHC class II expression is absent de novo on murine lung epithelial and endothelial cells. The induction of OAD was accompanied by enhanced cellular and humoral immune responses to self-antigens (Collagen V and K- α1Tubulin). Further, lung-infiltrating macrophages demonstrated a switch in their phenotype predominance from MΦ1 (F4/80+CD11c+) to MΦ2 (F4/80+CD206+) following administration of Abs and prior to development of OAD. Passive administration of macrophages harvested from animals with OAD but not from naïve animals induced OAD lesions. We conclude that MHC class II Abs induces a phenotype switch of lung infiltrating macrophages from MΦ1 (F4/80+CD11c+) to MΦ2 (F4/80+CD206+) resulting in the breakdown of self-tolerance along with an increase in autoimmune Th17 response leading to OAD.
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Sarma NJ, Tiriveedhi V, Angaswamy N, Mohanakumar T. Role of antibodies to self-antigens in chronic allograft rejection: potential mechanism and therapeutic implications. Hum Immunol 2012; 73:1275-81. [PMID: 22789626 DOI: 10.1016/j.humimm.2012.06.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 03/21/2012] [Accepted: 06/29/2012] [Indexed: 02/07/2023]
Abstract
Significant progress has been made in preventing acute allograft rejection following solid organ transplantation resulting in improved allograft survival. However, long term function still remains disappointing primarily due to chronic allograft rejection. Alloimmune responses primarily defined by the development of antibodies (Abs) to donor mismatched major histocompatibility antigens during the post-transplantation period have been strongly correlated to the development of chronic rejection. In addition, recent studies have demonstrated an important role for autoimmunity including the development of Abs to organ specific self-antigens in the pathogenesis of chronic allograft rejection. Based on this, a new paradigm has evolved indicating a possible cross-talk between the alloimmune responses and autoimmunity leading to chronic rejection. In this review, we will discuss the emerging concept for the role of cellular and humoral immune responses to self-antigens in the immunopathogenesis of chronic allograft rejection which has the potential to develop new strategies for the prevention and/or treatment of chronic rejection.
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Affiliation(s)
- Nayan J Sarma
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, United States
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21
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Ropponen JO, Syrjälä SO, Krebs R, Nykänen A, Tikkanen JM, Lemström KB. Innate and adaptive immune responses in obliterative airway disease in rat tracheal allografts. J Heart Lung Transplant 2011; 30:707-16. [PMID: 21411341 DOI: 10.1016/j.healun.2010.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/08/2010] [Accepted: 12/29/2010] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND We assessed cellular innate and adaptive immune responses in a rat heterotopic tracheal allograft model during the development of obliterative airway disease. METHODS Syngeneic tracheal grafts were transplanted heterotopically from DA to DA rats and fully MHC-mismatched allografts from DA to WF rats. The recipients received either no immunosuppression or two different doses of cyclosporine and were euthanized at 3, 10 and 30 days. Non-transplanted DA tracheas served as controls. Histologic, immunohistochemical and real-time RT-PCR analyses were performed. RESULTS The syngrafts had normal epithelium at 10 days and no tracheal occlusion was seen at 30 days. In non-immunosuppressed allografts, almost total loss of epithelium was observed at 10 days, culminating in tracheal occlusion at 30 days. The activation of innate immune response was observed during the ischemic period at 3 days in both groups. Influx of the infiltrating inflammatory cells was more prominent in the allografts. In syngrafts, mRNA expression of pro-inflammatory, but also tolerogenic, cytokines was significantly upregulated, whereas Th1 and Th17 priming factors were significantly downregulated. In allografts, prominent mRNA expression of pro-inflammatory cytokines was seen and adaptive Th1 and Th17 alloresponses were increased. Cyclosporine treatment reduced tracheal occlusion and inhibited both tolerogenic and pro-inflammatory T-cell responses in allografts. CONCLUSIONS Ischemia induced a self-limiting, alloantigen-independent innate immune response in syngrafts. In allografts, the predominant pro-inflammatory milieu and alloantigen-dependent Th1 and Th17 responses were linked to the development of obliterative airway disease and were inhibited by cyclosporine treatment.
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Affiliation(s)
- Jussi O Ropponen
- Cardiopulmonary Research Group, Transplantation Laboratory, Haartman Institute, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland.
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Bharat A, Saini D, Steward N, Hachem R, Trulock EP, Patterson GA, Meyers BF, Mohanakumar T. Antibodies to self-antigens predispose to primary lung allograft dysfunction and chronic rejection. Ann Thorac Surg 2010; 90:1094-101. [PMID: 20868794 DOI: 10.1016/j.athoracsur.2010.06.009] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 05/25/2010] [Accepted: 06/01/2010] [Indexed: 01/26/2023]
Abstract
BACKGROUND Primary graft dysfunction (PGD) is a known risk factor for bronchiolitis obliterans syndrome (BOS) after lung transplantation. Here, we report that preformed antibodies to self-antigens increase PGD risk and promote BOS. METHODS Adult lung transplant recipients (n = 142) were included in the study. Primary graft dysfunction and BOS were diagnosed based on International Society for Heart and Lung Transplantation guidelines. Antibodies to self-antigens k-alpha-1 tubulin, collagen type V, and collagen I were quantitated using standardized enzyme-linked immunosorbent assays, and cytokines were analyzed using Luminex immunoassays (Biosource International, Camirillo, CA). Human leukocyte antigen (HLA) antibodies were measured using Flow-PRA (One Lambda, Canoga Park, CA). RESULTS Lung transplant recipients with pretransplant antibodies to self-antigens had increased risk of PGD (odds ratio 3.09, 95% confidence interval: 1.2 to 8.1, p = 0.02) compared with recipients without. Conversely, in patients with PGD, 34.7% were positive for pretransplant antibodies whereas in the PGD negative group, only 14.6% had antibodies (p = 0.03). Antibody positive patients demonstrated high levels of proinflammatory cytokines interleukin (IL)-1β (2.1-fold increase), IL-2 (3.0), IL-12 (2.5), IL-15 (3.0), and chemokines interferon-inducible protein-10 (3.9) and monocyte chemotactic protein-1 (3.1; p < 0.01 for all). On 5-year follow-up, patients without antibodies showed greater freedom from development of HLA antibodies compared with patients who had antibodies (class I: 67% versus 38%, p = 0.001; class II: 71% versus 41%, p < 0.001). Patients with pretransplant antibodies were found to have an independent relative risk of 2.3 (95% confidence interval: 1.7 to 4.5, p = 0.009) for developing BOS. CONCLUSIONS Presence of antibodies to self-antigens pretransplant increases the risk of PGD immediately after transplant period and BOS on long-term follow-up. Primary graft dysfunction is associated with an inflammatory cascade that augments the alloimmune (anti-HLA) response that predisposes to BOS.
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Affiliation(s)
- Ankit Bharat
- Department of Surgery, Division of Cardiothoracic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
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Benden C, Faro A, Worley S, Arrigain S, Aurora P, Ballmann M, Boyer D, Conrad C, Eichler I, Elidemir O, Goldfarb S, Mallory GB, Mogayzel PJ, Parakininkas D, Solomon M, Visner G, Sweet SC, Danziger-Isakov LA. Minimal acute rejection in pediatric lung transplantation--does it matter? Pediatr Transplant 2010; 14:534-9. [PMID: 20059725 PMCID: PMC2888626 DOI: 10.1111/j.1399-3046.2009.01268.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In adult lung transplantation, a single minimal AR episode is a significant predictor of BOS independent of other factors. However, the significance of single minimal AR episodes in children is unknown. A retrospective, multi-center analysis was performed to determine whether isolated single AR episodes are associated with an increased BOS risk in children. Risk factors for BOS, death, or re-transplantation, and a combined outcome of BOS, death, or re-transplantation were assessed. Original data included 577 patients (<21 yr of age). A total of 383 subjects were eligible for the study. Fifteen percent of patients developed BOS, and 13% of patients either died or underwent re-transplant within one-yr post-transplant. In the multivariable survival model for time to BOS, there was no significant risk to developing BOS after a single minimal AR (A1) episode (HR 1.7, 95% CI 0.64-4.8; p=0.28). Even after a second minimal AR episode, no significant risk for BOS was appreciated. However, a single episode of mild AR (A2) was associated with twice the risk of BOS within one-yr post-transplant. In this select cohort, a single minimal AR episode was not associated with an increased risk for BOS within one yr following lung transplantation, in contrast to previous reports in adults.
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Affiliation(s)
- Christian Benden
- Division of Pulmonary Medicine, University Hospital, Zurich, Switzerland.
| | - Albert Faro
- Washington University School of Medicine & St Louis Children’s Hospital, MO, USA
| | - Sarah Worley
- The Children’s Hospital at Cleveland Clinic, Cleveland, OH, USA
| | - Susana Arrigain
- The Children’s Hospital at Cleveland Clinic, Cleveland, OH, USA
| | - Paul Aurora
- Great Ormond Street Hospital for Children & Institute of Child Health, London, UK
| | | | - Debra Boyer
- Harvard University & Children’s Hospital Boston, MA, USA
| | - Carol Conrad
- Lucile Packard Children’s Hospital at Stanford University, Palo Alto, CA, USA
| | | | - Okan Elidemir
- Baylor College of Medicine & Texas Children’s Hospital, Houston, TX, USA
| | | | - George B Mallory
- Baylor College of Medicine & Texas Children’s Hospital, Houston, TX, USA
| | | | - Daiva Parakininkas
- Medical College of Wisconsin & Children’s Hospital Wisconsin, Milwaukee, WI, USA
| | | | - Gary Visner
- Harvard University & Children’s Hospital Boston, MA, USA
| | - Stuart C Sweet
- Washington University School of Medicine & St Louis Children’s Hospital, MO, USA
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Behr J, Zimmermann G, Baumgartner R, Leuchte H, Neurohr C, Brand P, Herpich C, Sommerer K, Seitz J, Menges G, Tillmanns S, Keller M. Lung deposition of a liposomal cyclosporine A inhalation solution in patients after lung transplantation. J Aerosol Med Pulm Drug Deliv 2009; 22:121-30. [PMID: 19422312 DOI: 10.1089/jamp.2008.0714] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Bronchiolitis obliterans is the most important long-term sequelae of lung transplantation limiting survival. Optimized immunosuppression, including inhalation of cyclosporine A (CsA), may be a promising approach to overcome this problem. METHODS In this study a liposomal CsA solution was characterized in vitro, doses of 10 and 20 mg were inhaled with the PARI eFlow inhaler by 12 stable lung transplant recipients, and lung deposition was evaluated by gamma scintigraphy. RESULTS Inhalation of CsA leads to lung deposition of 40 +/- 6% (10 mg) and 33 +/- 7% (20 mg), respectively. This deposition resulted in a peripheral lung dose of 2.0 +/- 0.4 mg (10 mg) and 3.4 +/- 0.8 mg (20 mg), respectively. Extrathoracic deposition was 16 +/- 6% (10 mg) and 14 +/- 4% (20 mg), respectively, and the total deposition was calculated with 56% (10 mg) and 46% (20 mg). Lung deposition and peripheral lung deposition increased significantly with treatment time. The maximum CsA blood concentration and the area under the time course of blood concentration correlated with peripheral lung deposition. There were no statistically significant differences between patients with single- and double-lung transplantation. Inhalation of the study medication was well tolerated, and led to only minor but statistically significant changes in lung function parameters (FEV(1): -0.07 L; FVC: -0.09 L; sRaw: +0.35 kPa s.). CONCLUSIONS The new liposomal CsA PARI formulation can be deposited to the peripheral lung using the PARI eFlow nebulizer. The treatment was well tolerated, and no drug-related side effects were observed. Once or twice daily dosing of 10 mg CsA A PARI would result in a sufficient peripheral lung deposition of approximately 14 and 28 mg/week, respectively.
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Affiliation(s)
- Juergen Behr
- Department of Internal Medicine I, Klinikum Grosshadern, University of Munich, 81377 Munich, Germany.
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Pretransplant predictors of posttransplant adherence and clinical outcome: an evidence base for pretransplant psychosocial screening. Transplantation 2009; 87:1497-504. [PMID: 19461486 DOI: 10.1097/tp.0b013e3181a440ae] [Citation(s) in RCA: 158] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION There is growing awareness, yet scant prospective evidence that pretransplant (TX) psychosocial factors may predict post-TX outcome. We examined which pre-TX psychosocial factors predict post-TX nonadherence with immunosuppression (NA) and clinical outcomes in heart, liver, and lung TX. METHODOLOGY We prospectively followed 141 patients (28 heart, 61 liver, and 52 lung) from pre-TX until 1 year post-TX. Multivariable analyses determined which pre-TX factors (i.e., anxiety, depression, personality traits, social support, adherence with medication, and smoking status) predict poor post-TX outcome (i.e., NA, late acute rejection, graft loss, and resource utilization), controlling for medical predictors of poor outcome. RESULTS Pre-TX self-reported medication nonadherence (odds ratio [OR]=7.9), lower received social support (OR=0.9), a higher education (OR=2.7), and lower "conscientiousness" (OR=0.8) were independent predictors of post-TX NA. Not living in a stable relationship predicted graft loss (OR=4.9). Pre-TX medication NA was the only predictor for presence of late acute rejection (OR=4.4). No other pre-TX predictors for poor outcome could be found. CONCLUSION This is the first prospective study demonstrating that selected pre-TX psychosocial factors predict post-TX NA and poor clinical outcome, implying that pre-TX screening should include this set of factors in addition to traditional medical criteria.
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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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Daud SA, Yusen RD, Meyers BF, Chakinala MM, Walter MJ, Aloush AA, Patterson GA, Trulock EP, Hachem RR. Impact of immediate primary lung allograft dysfunction on bronchiolitis obliterans syndrome. Am J Respir Crit Care Med 2006; 175:507-13. [PMID: 17158279 DOI: 10.1164/rccm.200608-1079oc] [Citation(s) in RCA: 279] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
RATIONALE Primary graft dysfunction is a common complication after lung transplantation and a significant risk factor for short- and long-term mortality. OBJECTIVE We examined the impact of primary graft dysfunction on bronchiolitis obliterans syndrome. METHODS We performed a retrospective cohort study of 334 adult lung transplant recipients at our program and graded the severity of primary graft dysfunction according to the International Society for Heart and Lung Transplantation definition. We evaluated the impact of primary graft dysfunction on acute rejection, lymphocytic bronchitis, and bronchiolitis obliterans syndrome stage 1, using univariable and multivariable Cox proportional hazards models. MAIN RESULTS Among the 334 recipients, 65 did not have primary graft dysfunction (grade 0), 130 had grade 1, 69 had grade 2, and 70 had grade 3. In the univariable analysis, all grades of primary graft dysfunction were associated with a significantly increased risk of bronchiolitis obliterans syndrome stage 1 (grade 1: relative risk [RR] = 1.73; grade 2: RR = 2.13; and grade 3: RR = 2.53, compared with grade 0). The multivariable model demonstrated that the increased risk of bronchiolitis obliterans syndrome associated with primary graft dysfunction was independent of acute rejection, lymphocytic bronchitis, and community-acquired respiratory viral infections. However, there was no association between primary graft dysfunction and acute rejection or lymphocytic bronchitis. CONCLUSIONS Primary graft dysfunction is associated with an increased risk of bronchiolitis obliterans syndrome independent of acute rejection, lymphocytic bronchitis, and community-acquired respiratory viral infections, and this risk is directly related to the severity of primary graft dysfunction.
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Affiliation(s)
- Shiraz A Daud
- Division of Pulmonary and Critical Care, Washington University School of Medicine, 660 S. Euclid Avenue, Campus Box 8052, St. Louis, MO 63110, USA
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28
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Induction immunosuppression after lung transplantation. Curr Opin Organ Transplant 2006. [DOI: 10.1097/01.mot.0000247548.82734.2a] [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]
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