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Wu X, Yang Y. Neutrophil extracellular traps (NETs) and fibrotic diseases. Int Immunopharmacol 2024; 133:112085. [PMID: 38626550 DOI: 10.1016/j.intimp.2024.112085] [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: 02/28/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/18/2024]
Abstract
Fibrosis, a common cause and serious outcome of organ failure that can affect any organ, is responsible for up to 45% of all deaths in various clinical settings. Both preclinical models and clinical trials investigating various organ systems have shown that fibrosis is a highly dynamic process. Although many studies have sought to gain understanding of the mechanism of fibrosis progression, their findings have been mixed. In recent years, increasing evidence indicates that neutrophil extracellular traps (NETs) are involved in many inflammatory and autoimmune disorders and participate in the regulation of fibrotic processes in various organs and systems. In this review, we summarize the current understanding of the role of NETs in fibrosis development and progression and their possibility as therapeutic targets.
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Affiliation(s)
- Xiaojiao Wu
- School of Pediatrics, Nanjing Medical University, Nanjing, China
| | - Yang Yang
- Department of Gastroenterology, Sir Run Run Hospital, Nanjing Medical University, Nanjing, China.
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2
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Yu DH, Lin Q, Fan C, Skinner JT, Thiboutot JP, Yarmus LB, Johns RA. Resistin Pathway as Novel Mechanism of Post-lung Transplantation Bronchial Stenosis. J Bronchology Interv Pulmonol 2024; 31:30-38. [PMID: 37202855 DOI: 10.1097/lbr.0000000000000925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/11/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND Bronchial stenosis remains a significant source of morbidity among lung transplant recipients. Though infection and anastomotic ischemia have been proposed etiologies of the development of bronchial stenosis, the pathophysiologic mechanism has not been well elucidated. METHODS In this single-centered prospective study, from January 2013 through September 2015, we prospectively collected bronchoalveolar lavage (BAL) and endobronchial epithelial brushings from the direct anastomotic site of bronchial stenosis of bilateral lung transplant recipients who developed unilateral post-transplant bronchial stenosis. Endobronchial epithelial brushings from the contralateral anastomotic site without bronchial stenosis and BAL from bilateral lung transplant recipients who did not develop post-transplant bronchial stenosis were used as controls. Total RNA was isolated from the endobronchial brushings and real-time polymerase chain reaction reactions were performed. Electrochemiluminescence biomarker assay was used to measure 10 cytokines from the BAL. RESULTS Out of 60 bilateral lung transplant recipients, 9 were found to have developed bronchial stenosis with 17 samples adequate for analysis. We observed a 1.56 to 70.8 mean-fold increase in human resistin gene expression in the anastomotic bronchial stenosis epithelial cells compared with nonstenotic airways. Furthermore, IL-1β (21.76±10.96 pg/mL; control 0.86±0.44 pg/mL; P <0.01) and IL-8 levels (990.56±326.60 pg/mL; control 20.33±1.17 pg/mL; P <0.01) were significantly elevated in the BAL of the lung transplant patients who developed anastomotic bronchial stenosis. CONCLUSION Our data suggest that the development of postlung transplantation bronchial stenosis may be in part mediated through the human resistin pathway by IL-1β induced transcription factor nuclear factor-κβ activation and downstream upregulation of IL-8 in alveolar macrophages. Further study is needed in the larger patient cohorts and to determine its potential therapeutic role in the management of post-transplant bronchial stenosis.
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Affiliation(s)
- Diana H Yu
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, San Francisco, CA
| | - Qing Lin
- Department of Anesthesiology and Critical Care
| | | | | | - Jeffrey P Thiboutot
- Division of Pulmonary and Critical Care Medicine, Section of Interventional Pulmonology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Lonny B Yarmus
- Division of Pulmonary and Critical Care Medicine, Section of Interventional Pulmonology, Johns Hopkins University School of Medicine, Baltimore, MD
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3
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Shadrach BJ, Dutt N, Elhence P, Banerjee M, Chauhan NK, Jalandra RN, Garg MK, Garg P, Tandon A, Shishir S, Kochar R, Chhatwani B, Pareek P, Parrikar A. Clinical Utility of Bronchoalveolar Lavage Neutrophilia and Biomarkers for Evaluating Severity of Chronic Fibrosing Interstitial Lung Diseases. Cureus 2023; 15:e42162. [PMID: 37602059 PMCID: PMC10439013 DOI: 10.7759/cureus.42162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction It is hypothesized that bronchoalveolar lavage (BAL) neutrophilia, Krebs von den Lungen-6 (KL-6), and C-reactive protein (CRP) predict the severity of chronic fibrosing interstitial lung diseases (CF-ILDs). Methods This cross-sectional study enrolled 30 CF-ILD patients. Using Pearson's correlation analysis, BAL neutrophils, KL-6, and CRP were correlated with forced vital capacity (FVC), diffusing lung capacity for carbon monoxide (DLCO), six-minute walk distance (6MWD), partial pressure of oxygen (PaO2), computed tomography fibrosis score (CTFS), and pulmonary artery systolic pressure (PASP). Using the receiver operator characteristic (ROC) curve, BAL KL-6 and CRP were evaluated against FVC% and DLCO% in isolation and combination with BAL neutrophilia for predicting the severity of CF-ILDs. Results BAL neutrophilia significantly correlated only with FVC% (r = -0.38, P = 0.04) and DLCO% (r = -0.43, P = 0.03). BAL KL-6 showed a good correlation with FVC% (r = -0.44, P < 0.05) and DLCO% (r = -0.50, P = 0.02), while BAL CRP poorly correlated with all parameters (r = 0.0-0.2). Subset analysis of BAL CRP in patients with CTFS ≤ 15 showed a better association with FVC% (r = -0.28, P = 0.05) and DLCO% (r = -0.36, P = 0.04). BAL KL-6 cut-off ≥ 72.32 U/ml and BAL CRP ≥ 14.55 mg/L predicted severe disease with area under the curve (AUC) values of 0.77 and 0.71, respectively. The combination of BAL neutrophilia, KL-6, and CRP predicted severity with an AUC value of 0.89. Conclusion The combination of BAL neutrophilia, KL-6, and CRP facilitates the severity stratification of CF-ILDs complementing existing severity parameters.
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Affiliation(s)
- Benhur Joel Shadrach
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Naveen Dutt
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Poonam Elhence
- Department of Pathology, All India Institute of Medical Sciences, Jodhpur, IND
| | - Mithu Banerjee
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, IND
| | - Nishant Kumar Chauhan
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Ram N Jalandra
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Bathinda, IND
| | - Mahendra Kumar Garg
- Department of Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Pawan Garg
- Department of Radiology, All India Institute of Medical Sciences, Jodhpur, IND
| | - Abhishek Tandon
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Saumya Shishir
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Rishabh Kochar
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Bhavesh Chhatwani
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Piyush Pareek
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
| | - Anika Parrikar
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Jodhpur, IND
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Cho U, Kim TE, Park CK, Yoon HK, Sa YJ, Kim HL, Kim TJ. Prognostic Implication of Exfoliative Airway Pathology in Cancer-Free Coal Workers' Pneumoconiosis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14975. [PMID: 36429692 PMCID: PMC9690661 DOI: 10.3390/ijerph192214975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND The purpose of this study is to see if exfoliative pulmonary airway pathology in cancer-free coal workers' pneumoconiosis (CWP) can be used as a biomarker for predicting pulmonary morbidity. METHODS We investigated persistent metaplastic changes in bronchoscopic washing cytology and differential cell counts in bronchoalveolar lavages (BAL) in 97 miners with CWP and 80 miners without CWP as the control. Clinicopathological parameters were examined including pulmonary function tests and the presence of progressive massive fibrosis. RESULTS When compared to the control group, severe alveolitis, severe goblet cell hyperplasia (GCH), severe hyperplastic epithelial change, and severe squamous metaplasia were the distinguishing biomarkers in CWP. Multivariate analysis revealed that severe alveolitis and severe GCH, along with miner duration and current smoker, were independent predictors of pulmonary mortality. The survival analysis revealed a significantly different survival rate between the three groups: no evidence of severe alveolitis and severe GCH, presence of severe alveolitis or severe GCH but not both, and both severe alveolitis and severe GCH. CONCLUSIONS The severities of alveolitis and goblet cell hyperplasia in the bronchoscopic study are independent prognostic factors for CWP. A pathologic grading system based on these two parameters could be used in the stratification and clinical management of CWP patients.
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Affiliation(s)
- Uiju Cho
- Department of Hospital Pathology, St. Vincent Hospital, The Catholic University of Korea, 93 Jungbu-daero, Suwon 16247, Korea
| | - Tae-Eun Kim
- Department of Hospital Pathology, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 10, 63-ro, Seoul 07345, Korea
| | - Chan Kwon Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 07345, Korea
| | - Hyoung-Kyu Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 07345, Korea
| | - Young Jo Sa
- Department of Thoracic Surgery, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 10, 63-ro, Seoul 07345, Korea
| | - Hyo-Lim Kim
- Department of Radiology, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 10, 63-ro, Seoul 07345, Korea
| | - Tae-Jung Kim
- Department of Hospital Pathology, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 10, 63-ro, Seoul 07345, Korea
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Molecular pathways and role of epigenetics in the idiopathic pulmonary fibrosis. Life Sci 2022; 291:120283. [PMID: 34998839 DOI: 10.1016/j.lfs.2021.120283] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 12/19/2021] [Accepted: 12/27/2021] [Indexed: 12/12/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a fatal lung disease with unknown etiological factors that can progress to other dangerous diseases like lung cancer. Environmental and genetic predisposition are the two major etiological or risk factors involved in the pathology of the IPF. Among the environmental risk factors, smoking is one of the major causes for the development of IPF. Epigenetic pathways like nucleosomes remodeling, DNA methylation, histone modifications and miRNA mediated genes play a crucial role in development of IPF. Mutations in the genes make the epigenetic factors as important drug targets in IPF. Transcriptional changes due to environmental factors are also involved in the progression of IPF. The mutations in human telomerase reverse transcriptase (hTERT) have shown decreased life expectancy in IPF patients. The TERT-gene is highly expressed in chronic smokers and makes the role of epigenetics evident. Drug like nintedanib acts through vascular endothelial growth factor receptors (VEGFR), while drug pirfenidone acts through transforming growth factor (TGF), which is useful in IPF. Gefitinib, a tyrosine kinase inhibitor of EGFR, is useful as an anti-fibrosis agent in preclinical models. Newer drugs such as Celgene-CC90001 and FibroGen-FG-3019 are currently under investigations acts through the modulating epigenetic mechanisms. Thus, the study on epigenetics opens a wide window for the discovery of newer drugs. This study provides an elementary analysis of multiple regulators of epigenetics and their roles associated with the pathology of IPF. Further, this review also includes epigenetic drugs under development in preclinical and clinical stages.
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Rice AJ. Non-neoplastic respiratory fluid cytology including cell differential counts for interstitial lung disease. Cytopathology 2021; 33:44-56. [PMID: 34628692 DOI: 10.1111/cyt.13067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 12/23/2022]
Abstract
Bronchioloalveolar lavage (BAL) is a non-invasive and well-tolerated procedure that plays a key role in the diagnosis of a variety of non-neoplastic pulmonary diseases, including acute respiratory failure, infection, diffuse parenchymal lung disease (DLPD), paediatric and occupational lung disease, and in the evaluation of the lung allograft. A variety of analytic techniques are commonly performed on BAL fluid, including cytology, cell differential count, microbiology and virology, as well as a number of additional techniques in specific circumstances.
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Affiliation(s)
- Alexandra J Rice
- Department of Histopathology, Royal Brompton Hospital, London, UK
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Hirasawa Y, Nakada TA, Shimazui T, Abe M, Isaka Y, Sakayori M, Suzuki K, Yoshioka K, Kawasaki T, Terada J, Tsushima K, Tatsumi K. Prognostic value of lymphocyte counts in bronchoalveolar lavage fluid in patients with acute respiratory failure: a retrospective cohort study. J Intensive Care 2021; 9:21. [PMID: 33622402 PMCID: PMC7901004 DOI: 10.1186/s40560-021-00536-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 02/11/2021] [Indexed: 12/26/2022] Open
Abstract
Background Cellular patterns in bronchoalveolar lavage fluid (BALF) are used to distinguish or rule out particular diseases in patients with acute respiratory failure (ARF). However, whether BALF cellular patterns can predict mortality or not is unknown. We test the hypothesis that BALF cellular patterns have predictive value for mortality in patients with ARF. Methods This was a retrospective single-center observational study conducted in a Japanese University Hospital. Consecutive patients (n = 78) with both pulmonary infiltrates and ARF who were examined by bronchoalveolar lavage (BAL) between April 2015 and May 2018 with at least 1 year of follow-up were analyzed. Primary analysis was receiver operating characteristic curve—area under the curve (ROC-AUC) analysis for 1-year mortality. Results Among the final sample size of 78 patients, survivors (n = 56) had significantly increased lymphocyte and eosinophil counts and decreased neutrophil counts in BALF compared with non-survivors (n = 22). Among the fractions, lymphocyte count was the most significantly different (30 [12-50] vs. 7.0 [2.9-13]%, P <0.0001). In the ROC curve analysis of the association of BALF lymphocytes with 1-year mortality, the AUC was 0.787 (P <0.0001, cut-off value [Youden index] 19.0%). Furthermore, ≥20% BALF lymphocytes were significantly associated with increased survival with adjustment for baseline imbalances (1-year adjusted hazard ratio, 0.0929; 95% confidence interval, 0.0147–0.323, P <0.0001; 90-day P =0.0012). Increased survival was significantly associated with ≥20% BALF lymphocytes in both interstitial lung disease (ILD) and non-ILD subgroups (P =0.0052 and P =0.0033, respectively). In secondary outcome analysis, patients with ≥20% BALF lymphocytes had significantly increased ventilator-free days, which represents less respiratory dysfunction than those with <20% BALF lymphocytes. Conclusions In the patients with ARF, ≥20% lymphocytes in BALF was associated with significantly less ventilatory support, lower mortality at both 90-day and 1-year follow-ups.
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Affiliation(s)
- Yasutaka Hirasawa
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Taka-Aki Nakada
- Department of Emergency and Critical Care Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan.
| | - Takashi Shimazui
- Department of Emergency and Critical Care Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Mitsuhiro Abe
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Yuri Isaka
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Masashi Sakayori
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Kenichi Suzuki
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Keiichiro Yoshioka
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Takeshi Kawasaki
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Jiro Terada
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
| | - Kenji Tsushima
- Department of Pulmonary Medicine, School of Medicine, International University of Health and Welfare, Kozunomori 4-3, Narita, Chiba, 286-8686, Japan
| | - Koichiro Tatsumi
- Department of Respirology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
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Huang H, Zhang M, Chen C, Zhang H, Wei Y, Tian J, Shang J, Deng Y, Du A, Dai H. Clinical characteristics of COVID-19 in patients with preexisting ILD: A retrospective study in a single center in Wuhan, China. J Med Virol 2020; 92:2742-2750. [PMID: 32533777 PMCID: PMC7322991 DOI: 10.1002/jmv.26174] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/08/2020] [Indexed: 01/04/2023]
Abstract
Since the outbreak of 2019 novel coronavirus (SARS‐CoV‐2) pneumonia, many patients with underlying disease, such as interstitial lung disease (ILD), were admitted to Tongji hospital in Wuhan, China. To date, no data have ever been reported to reflect the clinical features of Corona Virus Disease 2019 (COVID‐19) among these patients with preexisting ILD. We analyzed the incidence and severity of COVID‐19 patients with ILD among 3201 COVID‐19 inpatients, and compared two independent cohorts of COVID‐19 patients with pre‐existing ILD (n = 28) and non‐ILD COVID‐19 patients (n = 130). Among those 3201 COVID‐19 inpatients, 28 of whom were COVID‐19 with ILD (0.88%). Fever was the predominant symptom both in COVID‐19 with ILD (81.54%) and non‐ILD COVID‐19 patients (72.22%). However, COVID‐19 patients with ILD were more likely to have cough, sputum, fatigue, dyspnea, and diarrhea. A very significantly higher number of neutrophils, monocytes, interleukin (IL)‐8, IL‐10, IL‐1β, and D‐Dimer was characterized in COVID‐19 with ILD as compared to those of non‐ILD COVID‐19 patients. Furthermore, logistic regression models showed neutrophils counts, proinflammatory cytokines (tumor necrosis factor‐alpha, IL6, IL1β, IL2R), and coagulation dysfunction biomarkers (D‐Dimer, PT, Fbg) were significantly associated with the poor clinical outcomes of COVID‐19. ILD patients could be less vulnerable to SARS‐CoV‐2. However, ILD patients tend to severity condition after being infected with SARS‐CoV‐2. The prognosis of COVID‐19 patients with per‐existing ILD is significantly worse than that of non‐ILD patients. And more, aggravated inflammatory responses and coagulation dysfunction appear to be the critical mechanisms in the COVID‐19 patients with ILD. ILD patients could be less vulnerable to SARS‐CoV‐2. However, ILD patients tend to severity condition after being infected with SARS‐CoV‐2. The prognosis of COVID‐19 patients with per‐existing ILD is significantly worse than that of non‐ILD patients. And more, aggravated inflammatory responses and coagulation dysfunction appear to be the critical mechanisms in the COVID‐19 patients with ILD.
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Affiliation(s)
- Hong Huang
- Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Wuhan, China
| | - Ming Zhang
- Department of Epidemiology and Biostatistics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Can Chen
- Department of Epidemiology and Biostatistics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huilan Zhang
- Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Wuhan, China
| | - Yanqiu Wei
- Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Wuhan, China
| | - Jianbo Tian
- Department of Epidemiology and Biostatistics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jin Shang
- Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Wuhan, China
| | - Yan Deng
- Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Wuhan, China
| | - Aihua Du
- Scientific Research Department, Tongji Hospital, Wuhan, China
| | - Huaping Dai
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China
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Chen XY, Huang MY, Xiao ZW, Yang S, Chen XQ. Lactate dehydrogenase elevations is associated with severity of COVID-19: a meta-analysis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2020; 24:459. [PMID: 32709251 PMCID: PMC7380662 DOI: 10.1186/s13054-020-03161-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/09/2020] [Indexed: 11/12/2022]
Affiliation(s)
- Xiao-Yun Chen
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Ming-Yao Huang
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110000, People's Republic of China
| | - Zheng-Wei Xiao
- Department of Orthopaedics, Fujian Provincial Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Sheng Yang
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China.
| | - Xiang-Qi Chen
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China.
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Ni S, Song M, Guo W, Guo T, Shen Q, Peng H. Biomarkers and their potential functions in idiopathic pulmonary fibrosis. Expert Rev Respir Med 2020; 14:593-602. [PMID: 32187497 DOI: 10.1080/17476348.2020.1745066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Idiopathic pulmonary fibrosis (IPF) is a chronic, devastating, and progressive lung disease that is characterized by fibrosis and respiratory failure. IPF holds high morbidity and poor prognosis and still faces considerable problems of reliable diagnosis and valid prognosis. A growing body of literature have reported changes in the level of various biomarkers in IPF patients, which means that they are expected to become a new tool for the clinical practice of IPF.Areas covered: We reviewed the recent literature about biomarkers and focus on the role they play in IPF. We systematically searched Medline/PubMed through February 2020. Many works of literature have shown that a variety of biomolecules and genomics played multiple roles in the diagnosis or differential diagnosis, prognosis, and indication of acute deterioration of IPF and so on.Expert opinion: Significant advances have been made in the role of biomarkers for IPF these years; however, current data indicate that a single biomarker is unlikely to have a transformative effect on clinical practice; therefore, the combined effect of various biomarkers can be considered to improve the accuracy of diagnosis and prognosis. Further research of biomarkers may provide new insights for the diagnosis, prognosis, and even therapy of IPF.
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Affiliation(s)
- Shanshan Ni
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
| | - Min Song
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
| | - Wei Guo
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
| | - Ting Guo
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
| | - Qinxue Shen
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
| | - Hong Peng
- Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital of Central South University; Research Unit of Respiratory Disease, Central South University; The Respiratory Disease Diagnosis and Treatment Center of Hunan Province, Changsha, Hunan, China
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Gharsalli H, Mlika M, Sahnoun I, Maalej S, Douik El Gharbi L, Mezni FE. The utility of bronchoalveolar lavage in the evaluation of interstitial lung diseases: A clinicopathological perspective. Semin Diagn Pathol 2018; 35:280-287. [DOI: 10.1053/j.semdp.2018.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Yang L, Herrera J, Gilbertsen A, Xia H, Smith K, Benyumov A, Bitterman PB, Henke CA. IL-8 mediates idiopathic pulmonary fibrosis mesenchymal progenitor cell fibrogenicity. Am J Physiol Lung Cell Mol Physiol 2017; 314:L127-L136. [PMID: 28860143 PMCID: PMC5866425 DOI: 10.1152/ajplung.00200.2017] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive fibrotic lung disease, but the mechanisms driving progression remain incompletely defined. We previously reported that the IPF lung harbors fibrogenic mesenchymal progenitor cells (MPCs), which serve as a cell of origin for IPF fibroblasts. Proliferating IPF MPCs are located at the periphery of fibroblastic foci in an active cellular front at the interface between the myofibroblast-rich focus core and adjacent normal alveolar structures. Among a large set of genes that distinguish IPF MPCs from their control counterparts, we identified IL-8 as a candidate mediator of IPF MPC fibrogenicity and driver of fibrotic progression. IPF MPCs and their progeny displayed increased steady-state levels of IL-8 and its cognate receptor CXCR1 and secreted more IL-8 than did controls. IL-8 functioned in an autocrine manner promoting IPF MPC self-renewal and the proliferation and motility of IPF MPC progeny. Secreted IL-8 also functioned in a paracrine manner stimulating macrophage migration. Analysis of IPF lung tissue demonstrated codistribution of IPF MPCs with activated macrophages in the active cellular front of the fibroblastic focus. These findings indicate that IPF MPC-derived IL-8 is capable of expanding the mesenchymal cell population and recruiting activated macrophages cells to actively evolving fibrotic lesions.
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Affiliation(s)
- Libang Yang
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Jeremy Herrera
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Adam Gilbertsen
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Hong Xia
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Karen Smith
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Alexey Benyumov
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Peter B Bitterman
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
| | - Craig A Henke
- Department of Medicine, University of Minnesota , Minneapolis, Minnesota
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13
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Ho JE, Gao W, Levy D, Santhanakrishnan R, Araki T, Rosas IO, Hatabu H, Latourelle JC, Nishino M, Dupuis J, Washko GR, O'Connor GT, Hunninghake GM. Galectin-3 Is Associated with Restrictive Lung Disease and Interstitial Lung Abnormalities. Am J Respir Crit Care Med 2017; 194:77-83. [PMID: 26771117 DOI: 10.1164/rccm.201509-1753oc] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
RATIONALE Galectin-3 (Gal-3) has been implicated in the development of pulmonary fibrosis in experimental studies, and Gal-3 levels have been found to be elevated in small studies of human pulmonary fibrosis. OBJECTIVES We sought to study whether circulating Gal-3 concentrations are elevated early in the course of pulmonary fibrosis. METHODS We examined 2,596 Framingham Heart Study participants (mean age, 57 yr; 54% women; 14% current smokers) who underwent Gal-3 assessment using plasma samples and pulmonary function testing between 1995 and 1998. Of this sample, 1,148 underwent subsequent volumetric chest computed tomography. MEASUREMENTS AND MAIN RESULTS Higher Gal-3 concentrations were associated with lower lung volumes (1.4% decrease in percentage of predicted FEV1 per 1 SD increase in log Gal-3; 95% confidence interval [CI], 0.8-2.0%; P < 0.001; 1.2% decrease in percentage of predicted FVC; 95% CI, 0.6-1.8%; P < 0.001) and decreased diffusing capacity of the lung for carbon monoxide (2.1% decrease; 95% CI, 1.3-2.9%; P < 0.001). These associations remained significant after multivariable adjustment (P ≤ 0.008 for all). Compared with the lowest quartile, participants in the highest Gal-3 quartile were more than twice as likely to have interstitial lung abnormalities visualized by computed tomography (multivariable-adjusted odds ratio, 2.67; 95% CI, 1.49-4.76; P < 0.001). CONCLUSIONS Elevated Gal-3 concentrations are associated with interstitial lung abnormalities coupled with a restrictive pattern, including decreased lung volumes and altered gas exchange. These findings suggest a potential role for Gal-3 in early stages of pulmonary fibrosis.
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Affiliation(s)
- Jennifer E Ho
- 1 Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.,2 Framingham Heart Study, NHLBI, Framingham, Massachusetts
| | - Wei Gao
- 3 Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
| | - Daniel Levy
- 2 Framingham Heart Study, NHLBI, Framingham, Massachusetts.,4 Population Sciences Branch, Division of Intramural Research, NHLBI, Bethesda, Maryland
| | | | - Tetsuro Araki
- 6 Center for Pulmonary Functional Imaging.,7 Department of Radiology, and
| | - Ivan O Rosas
- 8 Pulmonary and Critical Care Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Hiroto Hatabu
- 6 Center for Pulmonary Functional Imaging.,7 Department of Radiology, and
| | - Jeanne C Latourelle
- 9 Pulmonary Center, Department of Medicine, and.,10 Department of Neurology, Boston University School of Medicine, Boston, Massachusetts; and
| | - Mizuki Nishino
- 6 Center for Pulmonary Functional Imaging.,7 Department of Radiology, and
| | - Josée Dupuis
- 2 Framingham Heart Study, NHLBI, Framingham, Massachusetts.,3 Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
| | - George R Washko
- 6 Center for Pulmonary Functional Imaging.,8 Pulmonary and Critical Care Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - George T O'Connor
- 2 Framingham Heart Study, NHLBI, Framingham, Massachusetts.,9 Pulmonary Center, Department of Medicine, and
| | - Gary M Hunninghake
- 6 Center for Pulmonary Functional Imaging.,8 Pulmonary and Critical Care Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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14
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Mothapo KM, Stelma F, Janssen M, Kessels R, Miners S, Verbeek MM, Koopmans P, van der Ven A. Amyloid beta-42 (Aβ-42), neprilysin and cytokine levels. A pilot study in patients with HIV related cognitive impairments. J Neuroimmunol 2015; 282:73-9. [PMID: 25903731 DOI: 10.1016/j.jneuroim.2015.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/18/2015] [Accepted: 03/20/2015] [Indexed: 01/13/2023]
Abstract
HIV-associated dementia (HAD) is associated with amyloid-beta (Aβ) deposition. This study measured CSF and plasma amyloid beta-42 (Aβ-42), neprilysin (NEP) and cytokine levels in HIV-related cognitive impairments (HCI), HIV normal cognitive functioning (NF) and non-HIV controls. Our data showed a trend towards detectable plasma Aβ-42 levels more frequently in HCI (67%), when compared to NF (29%) and controls (10%). We showed elevated IL-8 levels in CSF of HCI compared to NF, although not significant values. The data from this pilot study indicates that CSF IL-8 and plasma Aβ-42 may be interesting biomarkers for the presence of HCI.
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Affiliation(s)
- K M Mothapo
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands.
| | - F Stelma
- Department of Virology, Radboud University Nijmegen Medical Center, The Netherlands
| | - M Janssen
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, The Netherlands
| | - R Kessels
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, The Netherlands
| | - S Miners
- Dementia Research Group, University of Bristol, Institute of Clinical Neurosciences, Level 1, Learning and Research, Southmead Hospital, Bristol, UK
| | - M M Verbeek
- Department of Neurology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands; Department of Laboratory Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - P Koopmans
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands
| | - A van der Ven
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands
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15
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Radhakrishnan D, Yamashita C, Gillio-Meina C, Fraser DD. Translational research in pediatrics III: bronchoalveolar lavage. Pediatrics 2014; 134:135-54. [PMID: 24982109 DOI: 10.1542/peds.2013-1911] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The role of flexible bronchoscopy and bronchoalveolar lavage (BAL) for the care of children with airway and pulmonary diseases is well established, with collected BAL fluid most often used clinically for microbiologic pathogen identification and cellular analyses. More recently, powerful analytic research methods have been used to investigate BAL samples to better understand the pathophysiological basis of pediatric respiratory disease. Investigations have focused on the cellular components contained in BAL fluid, such as macrophages, lymphocytes, neutrophils, eosinophils, and mast cells, as well as the noncellular components such as serum molecules, inflammatory proteins, and surfactant. Molecular techniques are frequently used to investigate BAL fluid for the presence of infectious pathologies and for cellular gene expression. Recent advances in proteomics allow identification of multiple protein expression patterns linked to specific respiratory diseases, whereas newer analytic techniques allow for investigations on surfactant quantification and function. These translational research studies on BAL fluid have aided our understanding of pulmonary inflammation and the injury/repair responses in children. We review the ethics and practices for the execution of BAL in children for translational research purposes, with an emphasis on the optimal handling and processing of BAL samples.
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Affiliation(s)
- Dhenuka Radhakrishnan
- Departments of Pediatrics,Children's Health Research Institute, London, Ontario, Canada
| | - Cory Yamashita
- Medicine,Centre for Critical Illness Research, Western University, London, Ontario, Canada; andPhysiology and Pharmacology, and
| | | | - Douglas D Fraser
- Departments of Pediatrics,Children's Health Research Institute, London, Ontario, Canada;Centre for Critical Illness Research, Western University, London, Ontario, Canada; andPhysiology and Pharmacology, andClinical Neurologic Sciences, Western University, London, Ontario, Canada;Translational Research Centre, London, Ontario, Canada
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16
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Nielepkowicz-Goździńska A, Fendler W, Robak E, Kulczycka-Siennicka L, Górski P, Pietras T, Brzeziańska E, Antczak A. Exhaled IL-8 in systemic lupus erythematosus with and without pulmonary fibrosis. Arch Immunol Ther Exp (Warsz) 2014; 62:231-8. [PMID: 24492930 PMCID: PMC4024123 DOI: 10.1007/s00005-014-0270-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 10/09/2013] [Indexed: 11/25/2022]
Abstract
The purpose of this study is to evaluate the relationship between the concentration of interleukin-8 (IL-8) in exhaled breath condensate (EBC) and bronchoalveolar lavage fluid (BALF) with the disease activity score and pulmonary function of systemic lupus erythematosus (SLE) patients with and without pulmonary fibrosis. Thirty-four SLE patients and 31 healthy controls were enrolled and evaluated using high-resolution computed tomography (HRCT), pulmonary function tests, systemic lupus activity measure (SLAM), assessing BALF and EBC. IL-8 levels in BALF and EBC samples were measured with an enzyme-immunosorbent assay kit. The mean (±SEM) IL-8 concentrations in BALF and EBC were higher in SLE patients compared to healthy controls (34.84 ± 95.0 vs. 7.65 ± 21.22 pg/ml, p < 0.001; 3.82 ± 0.52 pg/m vs. 1.7 ± 1.7 pg/ml, p < 0.001, respectively). SLE patients had increased percentage of neutrophils in BALF when compared with control group (1.00 ± 5.99 vs. 0.00 ± 0.56 %, p = 0.0003). Pulmonary fibrosis in HRCT was found in 50 % of SLE patients. The disease activity scored by SLAM was significantly higher and total lung capacity was significantly lower in SLE patients with pulmonary fibrosis (8.00 ± 3.17 vs. 6.00 ± 2.31, p = 0.01; 88.00 ± 28.29 vs. 112.00 ± 21.08 % predicted, p = 0.01, respectively). In SLE patients with pulmonary fibrosis, correlations were found between SLAM and IL-8 concentration in BALF, forced expiratory volume in 1 s and forced vital capacity (r = 0.65, p = 0.006; r = −0.53, p = 0.035; r = −0.67, p = 0.006, respectively). Our results indicate that IL-8 plays an important role in the pathogenesis of SLE. An increased concentration of IL-8 according to BALF could be considered as a useful biomarker of SLE activity and pulmonary fibrosis in SLE.
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Affiliation(s)
| | - Wojciech Fendler
- Department of Pediatrics, Oncology, Hematology and Diabetology, Medical University of Lodz, Lodz, Poland
| | - Ewa Robak
- Department of Dermatology and Venereology, Medical University of Lodz, Lodz, Poland
| | | | - Paweł Górski
- Department of Pneumonology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Tadeusz Pietras
- Department of Pneumonology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Ewa Brzeziańska
- Department of Molecular Bases of Medicine, Medical University of Lodz, Lodz, Poland
| | - Adam Antczak
- Department of General and Oncological Pneumology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland
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17
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McLoughlin P, Keane MP. Physiological and pathological angiogenesis in the adult pulmonary circulation. Compr Physiol 2013; 1:1473-508. [PMID: 23733650 DOI: 10.1002/cphy.c100034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Angiogenesis occurs during growth and physiological adaptation in many systemic organs, for example, exercise-induced skeletal and cardiac muscle hypertrophy, ovulation, and tissue repair. Disordered angiogenesis contributes to chronic inflammatory disease processes and to tumor growth and metastasis. Although it was previously thought that the adult pulmonary circulation was incapable of supporting new vessel growth, over that past 10 years new data have shown that angiogenesis within this circulation occurs both during physiological adaptive processes and as part of the pathogenic mechanisms of lung diseases. Here we review the expression of vascular growth factors in the adult lung, their essential role in pulmonary vascular homeostasis and the changes in their expression that occur in response to physiological challenges and in disease. We consider the evidence for adaptive neovascularization in the pulmonary circulation in response to alveolar hypoxia and during lung growth following pneumonectomy in the adult lung. In addition, we review the role of disordered angiogenesis in specific lung diseases including idiopathic pulmonary fibrosis, acute adult distress syndrome and both primary and metastatic tumors of the lung. Finally, we examine recent experimental data showing that therapeutic enhancement of pulmonary angiogenesis has the potential to treat lung diseases characterized by vessel loss.
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Affiliation(s)
- Paul McLoughlin
- University College Dublin, School of Medicine and Medical Sciences, Conway Institute, and St. Vincent's University Hospital, Dublin, Ireland.
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18
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Korkmaz B, Jenne DE, Gauthier F. Relevance of the mouse model as a therapeutic approach for neutrophil proteinase 3-associated human diseases. Int Immunopharmacol 2013; 17:1198-205. [PMID: 23886601 DOI: 10.1016/j.intimp.2013.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Proteinase 3 (PR3) is one of the four elastase-related serine proteinases stored in the azurophilic granules of neutrophils. Although it participates in the pro- and anti-inflammatory responses to infection and inflammation it also retains specific functions that make it different from neutrophil elastase in spite of their close structural resemblance. PR3 is involved in the immune response to infection and is the major autoantigen in granulomatosis with polyangiitis (GPA, formerly Wegener disease), an autoimmune systemic vasculitis with granulomas. Thus, PR3 appears to be a relevant therapeutic target in a variety of inflammatory human diseases. Animal models are required for the testing of new drugs that target PR3 specifically but differences between human and rodent neutrophil PR3 expression and substrate specificity have greatly impaired progress in this direction. This may explain that, to date, there is no spontaneous model of vasculitis associated with anti-PR3 antibodies. In this review, we will focus on the structural and functional differences between human and murine PR3, and how these differences may be by-passed in order to develop a relevant animal model.
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Affiliation(s)
- Brice Korkmaz
- "Centre d'Etudes des Pathologies Respiratoires", INSERM U-1100/EA-6305 37032, Université François Rabelais, 37032 Tours, France.
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19
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20
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Walters G, Agarwal S, Singh K, Burge PS, McGrath EE. Bronchoalveolar neutrophilia inversely correlates with DLCO at diagnosis in asbestosis but not lung function decline at 1 year. J Thorac Dis 2013; 5:314-6. [PMID: 23825766 DOI: 10.3978/j.issn.2072-1439.2013.04.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 04/24/2013] [Indexed: 11/14/2022]
Abstract
The role of bronchoalveolar lavage (BAL) in the assessment of interstitial lung disease (ILD) remains controversial. Previous studies have demonstrated that BAL cell differential is useful in predicting disease progression in many forms of ILD. We wished to investigate whether BAL had a similar use in predicting disease progression in asbestosis. 21 patients who had significant asbestos exposure, findings of UIP radiologically and BAL performed as part of their investigation were reviewed. There was a significant inverse correlation between percentage BAL neutrophils and percentage predicted DLCO at diagnosis (n=21; P=0.02; r(2)=(-)0.25; CI, (-)0.77(-)0.08), but not with DLCO decline over 1 year. Unlike previous reports in IPF, BAL cell differential is not predictive of decline in classic asbestosis with a UIP pattern and its routine use in this cohort of patients provides little if any additional benefit.
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Affiliation(s)
- Gareth Walters
- Occupational Lung Disease Unit, Birmingham Heartlands Hospital, Birmingham, UK
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21
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Sharawy MH, El-Agamy DS, Shalaby AA, Ammar ESM. Protective effects of methyl palmitate against silica-induced pulmonary fibrosis in rats. Int Immunopharmacol 2013; 16:191-8. [DOI: 10.1016/j.intimp.2013.04.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 04/02/2013] [Accepted: 04/05/2013] [Indexed: 01/26/2023]
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22
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Zielonka TM, Zycinska K, Radzikowska E, Filewska M, Bialas B, Obrowski MH, Skopinska-Rozewska E, Demkow U. Influence of sera from interstitial lung disease patients on angiogenic activity of mononuclear cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 756:139-45. [PMID: 22836629 DOI: 10.1007/978-94-007-4549-0_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Chronic inflammation stimulates of neovascularization. The aim of this study was to evaluate the effect of sera from interstitial lung diseases (ILD) patients on angiogenic capabilities of different subsets of mononuclear cells. Serum samples were obtained from 22 patients with sarcoidosis, 20 with hypersensitivity pneumonitis, 20 with idiopathic pulmonary fibrosis, 9 with systemic sclerosis, 6 with pulmonary Langerhans cells histiocytosis, and from 20 healthy volunteers. Animal model of leukocyte induced angiogenesis assay was used as an angiogenic test. The pattern of angiogenic reaction was different in different diseases. Sera from systemic sclerosis and pulmonary Langerhans cells histiocytosis patients exerted inhibitory effects on angiogenesis, but sera from sarcoidosis, hypersensitivity pneumonitis, and idiopathic pulmonary fibrosis patients stimulated angiogenesis. Sera from sarcoidosis and pulmonary Langerhans cells histiocytosis primed monocytes for the production of angiogenic factors. The number of microvessels created after incubation of mononuclear cells depleted of monocytes with sera from systemic sclerosis patients significantly decreased. We conclude that the role of monocytes in the modulation of angiogenesis varies depending on the type of ILD. Sera from sarcoidosis stimulate and from pulmonary Langerhans cells histiocytosis patients inhibit neovascularization induced by monocyte mediators. Sera from systemic sclerosis inhibit angiogenesis induced by lymphocyte products.
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Affiliation(s)
- T M Zielonka
- Department of Family Medicine, Medical University of Warsaw, Warsaw, Poland.
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23
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Gandhi NS, Mancera RL. Molecular Dynamics Simulations of CXCL-8 and Its Interactions with a Receptor Peptide, Heparin Fragments, and Sulfated Linked Cyclitols. J Chem Inf Model 2011; 51:335-58. [DOI: 10.1021/ci1003366] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Neha S. Gandhi
- Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, ‡School of Biomedical Sciences, and §School of Pharmacy, Curtin University, GPO Box U1987, Perth WA 6845, Australia
| | - Ricardo L. Mancera
- Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, ‡School of Biomedical Sciences, and §School of Pharmacy, Curtin University, GPO Box U1987, Perth WA 6845, Australia
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24
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Wuyts WA, Willems S, Vos R, Vanaudenaerde BM, De Vleeschauwer SI, Rinaldi M, Vanhooren HM, Geudens N, Verleden SE, Demedts MG, Thomeer M, Verbeken EK, Verleden GM. Azithromycin reduces pulmonary fibrosis in a bleomycin mouse model. Exp Lung Res 2010; 36:602-14. [PMID: 20874225 DOI: 10.3109/01902148.2010.492895] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease without proper treatment. Despite intensive research, the exact underlying pathogenesis remains elusive. It is regarded as a continuous injury, resulting in inflammation, infiltration, and proliferation of fibroblasts and extracellular matrix deposition, leading to an irreversible restrictive lung function deterioration and death. In this study the effect of azithromycin, a macrolide antibiotic on bleomycin-induced pulmonary fibrosis was investigated. C57BL/6 mice were intratracheally instilled with bleomycin (0.5 mg/kg) or saline. In the bleomycin group, half of the animals received azithromycin every other day from day 1 on. Bronchoalveolar lavage and histology were performed at days 7 and 35, and pulmonary function tests on day 35. At day 35, fibrotic lesions (spindle cell proliferation/collagen I deposition) were paralleled by a restrictive lung function pattern. Alterations were found in neutrophils and macrophages (innate immunity) and in T(H)2, T(H)17, and Treg cytokines (adaptive immunity). Azithromycin significantly reduced both fibrosis and the restrictive lung function pattern. This study demonstrated a beneficial effect of azithromycin on bleomycin-induced pulmonary fibrosis. A possible mechanism could be a modulation of both innate immunity and adaptive immunity. These findings might suggest a potential role for azithromycin in the treatment of IPF.
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Affiliation(s)
- W A Wuyts
- Laboratory of Pneumology, Katholieke Universiteit Leuven and University Hospitals Leuven, Leuven, Belgium.
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25
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Inci I, Erne B, Arni S, Jungraithmayr W, Inci D, Hillinger S, Vogt P, Leskosek B, Weder W. Prevention of primary graft dysfunction in lung transplantation by N-acetylcysteine after prolonged cold ischemia. J Heart Lung Transplant 2010; 29:1293-301. [PMID: 20822922 DOI: 10.1016/j.healun.2010.06.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 06/15/2010] [Accepted: 06/25/2010] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND N-Acetylcysteine (NAC), a thiol-containing compound that has been used as an anti-oxidant, may also lead to an increased glutathione synthesis. This study assessed the protective effect of NAC on primary graft dysfunction after lung transplantation. METHODS Porcine single left-lung transplantation was performed in 2 experimental groups after 24 hours of cold storage. Donor and recipient animals were treated with intravenous injection of 150 mg/kg NAC 60 minutes before harvest and reperfusion, followed by 12.5 mg/kg/hour continuous perfusion during the 8-hour observation period (NAC). Control animals did not receive any treatment. Hemodynamic and respiratory parameters were recorded throughout the observation period. Bronchoalveolar lavage (BAL) nitrite, neutrophil elastase (NE), protein accumulation, interleukin (IL)-8, nuclear factor-κB (p50 sub-unit), and reduced glutathione (GSH) in lung tissue and red blood were measured. RESULTS During the observation period, the mean pulmonary artery pressure, oxygenation, airway pressure, and static lung compliance were significantly better in NAC animals compared with controls (p < 0.05). Extravascular lung water index was higher at points during the reperfusion in the control group. BAL protein, nitrite, NE, and IL-8 cytokine levels at the end of the experiment were significantly higher in the controls than in the NAC group (p < 0.05). Lung tissue reduced GSH levels were significantly higher in the NAC group than in the control group. Red blood cell GSH levels were always higher in the NAC group during the reperfusion period. Reverse transcription polymerase chain reaction for IL-8 messenger RNA was significantly higher in controls during the reperfusion period than in the NAC group (p = 0.001). The amount of lung tissue nuclear NF-κB (p50 sub-unit) was significantly higher in controls than in NAC pigs (p = 0.03). CONCLUSION In this model, donor and recipient treatment with NAC effectively protected the lung from primary graft dysfunction after prolonged cold ischemia.
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Affiliation(s)
- Ilhan Inci
- Division of Thoracic Surgery, University of Zurich, Rämistrasse 100, Zurich, Switzerland.
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26
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Li NYK, Vodovotz Y, Hebda PA, Abbott KV. Biosimulation of inflammation and healing in surgically injured vocal folds. Ann Otol Rhinol Laryngol 2010; 119:412-23. [PMID: 20583741 DOI: 10.1177/000348941011900609] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVES The pathogenesis of vocal fold scarring is complex and remains to be deciphered. The current study is part of research endeavors aimed at applying systems biology approaches to address the complex biological processes involved in the pathogenesis of vocal fold scarring and other lesions affecting the larynx. METHODS We developed a computational agent-based model (ABM) to quantitatively characterize multiple cellular and molecular interactions involved in inflammation and healing in vocal fold mucosa after surgical trauma. The ABM was calibrated with empirical data on inflammatory mediators (eg, tumor necrosis factor) and extracellular matrix components (eg, hyaluronan) from published studies on surgical vocal fold injury in the rat population. RESULTS The simulation results reproduced and predicted trajectories seen in the empirical data from the animals. Moreover, the ABM studies suggested that hyaluronan fragments might be the clinical surrogate of tissue damage, a key variable that in these simulations both is enhanced by and further induces inflammation. CONCLUSIONS A relatively simple ABM such as the one reported in this study can provide new understanding of laryngeal wound healing and generate working hypotheses for further wet-lab studies.
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Affiliation(s)
- Nicole Y K Li
- Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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27
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Rajaram MVS, Brooks MN, Morris JD, Torrelles JB, Azad AK, Schlesinger LS. Mycobacterium tuberculosis activates human macrophage peroxisome proliferator-activated receptor gamma linking mannose receptor recognition to regulation of immune responses. THE JOURNAL OF IMMUNOLOGY 2010; 185:929-42. [PMID: 20554962 DOI: 10.4049/jimmunol.1000866] [Citation(s) in RCA: 199] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mycobacterium tuberculosis enhances its survival in macrophages by suppressing immune responses in part through its complex cell wall structures. Peroxisome proliferator-activated receptor gamma (PPARgamma), a nuclear receptor superfamily member, is a transcriptional factor that regulates inflammation and has high expression in alternatively activated alveolar macrophages and macrophage-derived foam cells, both cell types relevant to tuberculosis pathogenesis. In this study, we show that virulent M. tuberculosis and its cell wall mannose-capped lipoarabinomannan induce PPARgamma expression through a macrophage mannose receptor-dependent pathway. When activated, PPARgamma promotes IL-8 and cyclooxygenase 2 expression, a process modulated by a PPARgamma agonist or antagonist. Upstream, MAPK-p38 mediates cytosolic phospholipase A(2) activation, which is required for PPARgamma ligand production. The induced IL-8 response mediated by mannose-capped lipoarabinomannan and the mannose receptor is independent of TLR2 and NF-kappaB activation. In contrast, the attenuated Mycobacterium bovis bacillus Calmette-Guérin induces less PPARgamma and preferentially uses the NF-kappaB-mediated pathway to induce IL-8 production. Finally, PPARgamma knockdown in human macrophages enhances TNF production and controls the intracellular growth of M. tuberculosis. These data identify a new molecular pathway that links engagement of the mannose receptor, an important pattern recognition receptor for M. tuberculosis, with PPARgamma activation, which regulates the macrophage inflammatory response, thereby playing a role in tuberculosis pathogenesis.
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Affiliation(s)
- Murugesan V S Rajaram
- Center for Microbial Interface Biology, Ohio State University, Columbus, OH 43210, USA
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Sharma PR, Jain S, Bamezai RNK, Tiwari PK. Utility of serum LDH isoforms in the assessment of mycobacterium tuberculosis induced pathology in TB patients of Sahariya tribe. Indian J Clin Biochem 2010; 25:57-63. [PMID: 23105885 PMCID: PMC3453013 DOI: 10.1007/s12291-010-0012-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present study was carried out in the Sahariya tribe of Central India, which reportedly have high prevalence of pulmonary tuberculosis. Total serum LDH and its tissue specific isoforms were estimated in TB patients and matched healthy controls to test the utility of LDH as diagnostic marker for tuberculosis. About 210 sputum positive cases and 328 age and sex matched sputum negative controls were recruited. The spectrophotometeric and densitometric analysis of each LDH isoform was carried out in both cases and controls. The mean values of serum LDH were estimated and compared for each class by t-test. The statistical comparisons were made between sputum negative controls and sputum positive cases by Mann-Whitney's U test. The spectrophotometric estimation of serum LDH revealed significant (P=0.0016) increase in its level in cases (290 IU/L) as compared to controls (248 IU/L). The densitometric analysis of individual LDH isoforms in cases and controls demonstrated significant elevation in LDH1 (P>0.05), LDH2 (P>0.05) and LDH3 (P<0.005) in sputum positive cases in comparison to sputum negative controls. Our study revealed a positive correlation between serum LDH level and the presence of mycobacteria and their load, suggesting utility of LDH as an important diagnostic marker of tuberculosis induced stress, at least in tribal areas lacking access to modern clinical tests.
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Affiliation(s)
- P. R. Sharma
- Centre for Genomics, School of Studies in Zoology (CG-SSZ), Jiwaji University, Gwalior, 474011 India
- National Centre for Applied Human Genetics (NCAHG), SLS, Jawaharlal Nehru University (JNU), New Delhi, India
| | - S. Jain
- District Hospital, Sheopur, M.P. India
| | - R. N. K. Bamezai
- National Centre for Applied Human Genetics (NCAHG), SLS, Jawaharlal Nehru University (JNU), New Delhi, India
| | - P. K. Tiwari
- Centre for Genomics, School of Studies in Zoology (CG-SSZ), Jiwaji University, Gwalior, 474011 India
- Molecular & Human Genetics School of Studies in Zoology, Jiwaji University, Gwalior, 474011 India
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Kim YJ, Song M, Ryu JC. Mechanisms underlying methotrexate-induced pulmonary toxicity. Expert Opin Drug Saf 2009; 8:451-8. [DOI: 10.1517/14740330903066734] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Kim YJ, Song M, Ryu JC. Inflammation in methotrexate-induced pulmonary toxicity occurs via the p38 MAPK pathway. Toxicology 2008; 256:183-90. [PMID: 19100307 DOI: 10.1016/j.tox.2008.11.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 11/25/2022]
Abstract
Methotrexate (MTX) has been widely used for the treatment of inflammatory diseases and rheumatoid arthritis (RA), as well as a variety of tumors. However, MTX-induced toxicity is a serious and unpredictable side effect of this therapy and an important clinical problem. We used microarray analysis to examine MTX-induced gene expression in a human lung epithelial cell line (BEAS-2B) and identified 10 differentially expressed genes related to the p38 mitogen-activated protein kinase (MAPK) pathway, including IL-1beta, MKK6, and MAPKAPK2. Differential gene expression was confirmed via real-time RT-PCR. To determine the functional significance of MTX-induced p38 MAPK activation, we used a p38 MAPK inhibitor (SB203580) to block the p38 MAPK cascade. We also used protein array technology to investigate the modulated expression of pro- and anti-inflammatory cytokines in BEAS-2B cells. MTX activated IL-1beta expression and induced the phosphorylation of various proteins in the p38 MAPK cascade, including TAK1, MKK3/MKK6, p38 MAPK, MAPKAPK2, and HSP27. Finally, HSP27 activation may increase IL-8 secretion, resulting in a pulmonary inflammatory response such as pneumonitis. Although IL-1beta and IL-8 expression increased, the expression of IL-4, IL-6, IL-12, TNF-alpha, MIP-1alpha, and MIP-1beta decreased in a dose-dependent manner. These results suggest that the modulation of cytokine expression may play an important role in MTX-induced pulmonary toxicity.
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Affiliation(s)
- Youn-Jung Kim
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul, Republic of Korea
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O'Neill HC, Rancourt RC, White CW. Lipoic acid suppression of neutrophil respiratory burst: effect of NADPH. Antioxid Redox Signal 2008; 10:277-85. [PMID: 18158760 DOI: 10.1089/ars.2007.1890] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Lipoic acid (LA) and its reduced product dihydrolipoic acid (DHLA) are potent antioxidants with capacity to scavenge reactive oxygen species (ROS) and recycle endogenous antioxidants. LA may increase cellular glutathione (GSH), an antioxidant lacking in the lung's epithelial lining fluid in lung disorders such as idiopathic pulmonary fibrosis (IPF). Neutrophils (PMN) are key innate responders and are pivotal in clearing bacterial infection, therefore it is crucial to understand the impact LA may have on their function. Circulating neutrophils were isolated from healthy volunteers and pretreated with LA or diluent. Cells were subsequently activated with phorbol 12-myristate 13-acetate (PMA, 100 ng/ml) to induce ROS production. SOD-inhibitable reduction of acetylated cytochrome c demonstrated the PMA-dependent respiratory burst was suppressed by LA. Oxygen consumption also was diminished when PMA-stimulated cells were pretreated with LA. PMN respiratory burst was partially restored by addition of NADPH but not other pyridine nucleotides. LA did not inhibit glucose-6-phosphate dehydrogenase activity of PMN. These data together suggest that the reduction of LA to DHLA using cellular NADPH may limit the capacity of the PMN NADPH oxidase to produce superoxide. Further studies will be required to determine if LA can diminish excessive superoxide produced by PMN and/or alveolar macrophages in IPF or relevant disease models in vivo.
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Affiliation(s)
- Heidi C O'Neill
- Department of Pharmaceutical Sciences, Program in Toxicology, School of Pharmacy, University of Colorado Health Sciences Center, Denver, Colorado, USA
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Takahashi T, Wada I, Ohtsuka Y, Munakata M, Homma Y, Kuroki Y. Autoantibody to alanyl-tRNA synthetase in patients with idiopathic pulmonary fibrosis. Respirology 2007; 12:642-53. [PMID: 17875050 DOI: 10.1111/j.1440-1843.2007.01140.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES The pathogenesis of IPF is unknown and it is hypothesized that immunological responses are involved. The purpose of this study was to detect autoantibodies in IPF patients and to identify the relevant antigens. METHODS Sera from 37 healthy subjects and 22 IPF patients who had no clinical symptoms of collagen vascular disease were examined for immunostaining of A549 human type II cells and human lung tissue. Immunoprecipitation and proteome analysis were performed to identify the antigen. RESULTS Fifty per cent of the patient sera and none of the control sera exhibited positive staining. Sera from 10 of the 22 IPF patients showed positive immunohistochemistry and immunoprecipitated a 110-kDa protein from the A549 cell lysate. Sera from only two of 41 patients with collagen vascular disease showed positive immunoreactivity. Proteome analysis using tandem mass spectrometry revealed that the protein was alanyl-tRNA synthetase. Transfection of cDNA of this enzyme into CHO-K1 cells conferred positive staining on these cells with the patients' IgG. The 135-kDa fusion protein consisting of 108-kDa enzyme protein and 27-kDa YFP from the cell lysate of the transfected cells was immunoprecipitated by the patient IgG. In addition, sera from IPF patients significantly inhibited the enzyme activity of alanyl-tRNA synthetase. CONCLUSION A significant number of IPF patients possess circulating autoantibodies against alanyl-tRNA synthetase, suggesting the involvement of an autoimmune background in the pathogenesis of IPF.
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Affiliation(s)
- Toru Takahashi
- Department of Biochemistry, Sapporo Medical University School of Medicine, Sapporo, Japan
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Papiris SA, Kollintza A, Karatza M, Manali ED, Sotiropoulou C, Milic-Emili J, Roussos C, Daniil Z. CD8+ T lymphocytes in bronchoalveolar lavage in idiopathic pulmonary fibrosis. JOURNAL OF INFLAMMATION-LONDON 2007; 4:14. [PMID: 17578573 PMCID: PMC1906752 DOI: 10.1186/1476-9255-4-14] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2006] [Accepted: 06/19/2007] [Indexed: 11/24/2022]
Abstract
Background Recently it was shown that in Idiopathic Pulmonary Fibrosis (IPF) tissue infiltrating CD8+ T lymphocytes (TLs) are associated with breathlessness and physiological indices of disease severity, as well as that CD8+ TLs recovered by bronchoalveolar lavage (BAL) relate to those infiltrating lung tissue. Since BAL is a far less invasive technique than tissue biopsy to study mechanisms in IPF we further investigated the usefulness offered by this means by studying the relationship between BAL macrophages, neutrophils, eosinophils, CD3+, CD4+, CD8+, CD8+/38+ TLs and CD4+/CD8+ ratio with breathlessness and physiological indices. Patients and methods 27 IPF patients, 63 ± 9 years of age were examined. Cell counts were expressed as percentages of total cells and TLs were evaluated by flow cytometry. FEV1, FVC, TLC, RV, DLCO, PaO2, and PaCO2 were measured in all. Breathlessness was assessed by the Medical Research Council (MRC) chronic dyspnoea scale. Results CD8+ TLs correlated positively (rs = 0.46, p = 0.02), while CD4+/CD8+ ratio negatively (rs = -0.54, p = 0.006) with the MRC grade. CD8+ TLs correlated negatively with RV (rs = -0.50, p = 0.017). CD8+/38+ TLs were negatively related to the FEV1 and FVC (rs = -0.53, p = 0.03 and rs = -0.59, p = 0.02, respectively). Neutrophils correlated positively with the MRC grade (rs = 0.42, p = 0.03), and negatively with the DLCO (rs = -0.54, p = 0.005), PaO2 (rs = -0.44, p = 0.03), and PaCO2 (rs = -0.52, p = 0.01). Conclusion BAL CD8+ TLs associations with physiological and clinical indices seem to indicate their implication in IPF pathogenesis, confirming our previous tissue study.
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Affiliation(s)
- Spyros A Papiris
- 2Pulmonary Department, National and Kapodistrian University of Athens, "Attikon" University Hospital, Athens, Greece
- Associate Professor of Medicine and Chairman, 2Pulmonary Department, National and Kapodistrian University of Athens, Medical School of Athens, "ATTIKON" University Hospital 1 Rimini Street, 12462 Haidari, Athens, Greece
| | - Androniki Kollintza
- Department of Critical Care and Pulmonary Services, National and Kapodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | | | - Effrosyni D Manali
- 2Pulmonary Department, National and Kapodistrian University of Athens, "Attikon" University Hospital, Athens, Greece
| | - Christina Sotiropoulou
- Applied Biomedical Research & Training Laboratory "Marianthi Simou", National and Kapodistrian University of Athens, Greece
| | - Joseph Milic-Emili
- Meakins-Cristie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Charis Roussos
- Department of Critical Care and Pulmonary Services, National and Kapodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | - Zoe Daniil
- Medical School, University of Thessaly, 41222 Larissa, Greece
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Chen E, Moller D. Cytokines and Chemokines in Sarcoidosis. LUNG BIOLOGY IN HEALTH AND DISEASE 2005. [DOI: 10.1201/b13773-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Tsoutsou PG, Gourgoulianis KI, Petinaki E, Germenis A, Tsoutsou AG, Mpaka M, Efremidou S, Molyvdas PA. Cytokine levels in the sera of patients with idiopathic pulmonary fibrosis. Respir Med 2005; 100:938-45. [PMID: 16236490 DOI: 10.1016/j.rmed.2005.06.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2004] [Revised: 03/04/2005] [Accepted: 06/16/2005] [Indexed: 02/06/2023]
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) is a fibroproliferative disorder. Cytokines contribute an important but yet undefined role to its pathogenesis. OBJECTIVES The present study aims to compare serum levels of cytokines involved in Th-1 and Th-2 immunity, such as interleukins (IL) IL-2, IL-4, IL-8, IL-10, interferon-gamma (IFN-gamma) and IL-12 (p40) in patients with IPF and healthy volunteers. Twenty patients with IPF and 40 healthy controls (HC) participated. METHODS Cytokines were assessed by enzyme-linked immunoabsorbent assay (ELISA). RESULTS Median values of serum IL-2, IL-8, IL-10, IL-12 (p40) were higher in the IPF than the control group: IPF group: 1.05 U/ml, 12.55, 10.13, 44.17 pg/ml; control group: 0.05 U/ml, 6.91, 0.75, 4.51 pg/ml, respectively (P<0.05). IFN-gamma serum levels were lower in the IPF (0.19 pg/ml) than in the control group (0.49 pg/ml). IL-4 values did not differ in a statistically significant way among the groups: 8.40 pg/ml in the IPF group, and 7.46 pg/ml in the control group (P>0.05). IL-4 positively correlated to fast expiratory volume in 1s (FEV1%) and forced vital capacity (FVC%), while IL-8 negatively correlated to the respective values (P<0.005). CONCLUSIONS IL-2, IL-8, IL-10 and IL-12 (p40) were found to be elevated in the sera of patients with IPF. IFN-gamma was found to be decreased in the sera of patients with IPF.
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Affiliation(s)
- Pelagia G Tsoutsou
- Pulmonary Department, University of Thessaly, Universal Hospital of Larissa, Mezourlo, Larissa, Greece.
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Daniil Z, Kitsanta P, Kapotsis G, Mathioudaki M, Kollintza A, Karatza M, Milic-Emili J, Roussos C, Papiris SA. CD8+ T lymphocytes in lung tissue from patients with idiopathic pulmonary fibrosis. Respir Res 2005; 6:81. [PMID: 16042790 PMCID: PMC1199622 DOI: 10.1186/1465-9921-6-81] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2005] [Accepted: 07/24/2005] [Indexed: 01/12/2023] Open
Abstract
Background Several studies have implicated a role of inflammation in the pathogenesis of lung damage in idiopathic pulmonary fibrosis (IPF). Parenchymal lung damage leads to defects in mechanics and gas exchange and clinically manifests with exertional dyspnea. Investigations of inflammatory cells in IPF have shown that eosinophils, neutrophils and CD8+ TLs may be associated with worse prognosis. We wished to investigate by quantitative immunohistochemistry infiltrating macrophages, neutrophils and T lymphocytes (TLs) subpopulations (CD3+, CD4+ and CD8+) in lung tissue of patients with IPF and their correlation with lung function indices and grade of dyspnoea. Methods Surgical biopsies of 12 patients with IPF were immunohistochemically stained with mouse monoclonal antibodies (anti-CD68 for macrophages, anti-elastase for neutrophils, and anti-CD3, anti-CD4, anti-CD8 for CD3+TLs, CD4+TLs, and CD8+TLs respectively). The number of positively stained cells was determined by observer-interactive computerized image analysis (SAMBA microscopic image processor). Cell numbers were expressed in percentage of immunopositive nuclear surface in relation to the total nuclear surface of infiltrative cells within the tissue (labeling Index). Correlations were performed between cell numbers and physiological indices [FEV1, FVC, TLC, DLCO, PaO2, PaCO2 and P(A-a)O2)] as well as dyspnoea scores assessed by the Medical Research Council (MRC) scale. Results Elastase positive cells accounted for the 7.04% ± 1.1 of total cells, CD68+ cells for the 16.6% ± 2, CD3+ TLs for the 28.8% ± 7, CD4+ TLs for the 14.5 ± 4 and CD8+ TLs for the 13.8 ± 4. CD8+TLs correlated inversely with FVC % predicted (rs = -0.67, p = 0.01), TLC % predicted (rs = -0.68, p = 0.01), DLCO % predicted (rs = -0.61, p = 0.04), and PaO2 (rs = -0.60, p = 0.04). Positive correlations were found between CD8+TLs and P(A-a)O2 (rs = 0.65, p = 0.02) and CD8+TLs and MRC score (rs = 0.63, p = 0.02). Additionally, CD68+ cells presented negative correlations with both FVC % predicted (rs = -0.80, p = 0.002) and FEV1 % predicted (rs = -0.68, p = 0.01). Conclusion In UIP/IPF tissue infiltrating mononuclear cells and especially CD8+ TLs are associated with the grade of dyspnoea and functional parameters of disease severity implicating that they might play a role in its pathogenesis.
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Affiliation(s)
- Zoe Daniil
- Department of Critical Care and Pulmonary Services, National and Capodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | | | - George Kapotsis
- Department of Critical Care and Pulmonary Services, National and Capodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | | | - Androniki Kollintza
- Department of Critical Care and Pulmonary Services, National and Capodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | | | - Joseph Milic-Emili
- Meakins-Cristie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Charis Roussos
- Department of Critical Care and Pulmonary Services, National and Capodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
| | - Spyros A Papiris
- Department of Critical Care and Pulmonary Services, National and Capodistrian University of Athens, "Evangelismos" Hospital, Athens, Greece
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Babu PBR, Chidekel A, Shaffer TH. Association of interleukin-8 with inflammatory and innate immune components in bronchoalveolar lavage of children with chronic respiratory diseases. Clin Chim Acta 2005; 350:195-200. [PMID: 15530478 DOI: 10.1016/j.cccn.2004.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Revised: 07/27/2004] [Accepted: 07/29/2004] [Indexed: 11/16/2022]
Abstract
BACKGROUND The host inflammatory response and innate immunity play a complex role in respiratory diseases. METHODS We evaluated the levels of inflammatory mediators and antibacterial proteins in children who required bronchoscopy and bronchoalveolar lavage fluid (BALF) for clinical indications such as chronic tracheostomy (n=15) and chronic suppurative lung disease (n=8). RESULTS Our results suggested the presence of interleukin-1beta (IL-1beta) and IL-8 as major inflammatory mediators in BALF samples. The level of the antibacterial protein sIgA was higher than lactoferrin and lysozyme. BALF IL-8 levels significantly correlated with the presence of IL-1beta, IL-6, IL-10, IL-16, sIgA and lysozyme. BALF IL-8 levels did not correlate with the levels of immunomodulatory and anti-inflammatory clara cell 10 kDa protein (CC10) or lactoferrin. CONCLUSION This study suggests that patients with high levels of BALF IL-8 could potentially have high levels of IL-6, IL-10, IL-16, lysozyme and sIgA. Evaluating the inflammatory mediators (IL-8) in relation to other BALF protein components provides insight into understanding the role of inflammatory mediators in the regulation of host defense and the response to lung inflammation and injury.
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Affiliation(s)
- Polani B Ramesh Babu
- Department of Biomedical Research, Nemours Research Lung Center, Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE 19803, USA.
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Abstract
Considerable progress has been made in understanding the similarities and differences among the forms of the interstitial lung diseases (ILDs), particularly the forms of idiopathic interstitial pneumonia, now recognized as distinct clinicopathologic entities. Lung parenchymal evaluation by high-resolution CT scanning of the chest may provide images that are virtually diagnostic of certain forms of ILD, but other testing, including bronchoalveolar lavage (BAL) and lung biopsy, may be required for accurate diagnosis. The differential diagnosis of these disorders rests on the clinician's interpretation of the clinical presentation and physical examination findings, pulmonary function testing, radiographic imaging, and, if required, sampling of lung tissue. This discussion examines the usefulness of BAL in the diagnosis of specific forms of ILD.
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Affiliation(s)
- Keith C Meyer
- Department of Medicine, University of Wisconsin Medical School, K4/930 Clinical Sciences Center, 600 Highland Avenue, Madison, WI 53792-9988, USA.
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White ES, Lazar MH, Thannickal VJ. Pathogenetic mechanisms in usual interstitial pneumonia/idiopathic pulmonary fibrosis. J Pathol 2004; 201:343-54. [PMID: 14595745 PMCID: PMC2810622 DOI: 10.1002/path.1446] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive, usually fatal, form of interstitial lung disease characterized by failure of alveolar re-epithelialization, persistence of fibroblasts/myofibroblasts, deposition of extracellular matrix, and distortion of lung architecture which ultimately results in respiratory failure. Clinical IPF is associated with a histopathological pattern of usual interstitial pneumonia (UIP) on surgical lung biopsy. Therapy for this disease with glucocorticoids and other immunomodulatory agents is largely ineffective and recent trials of newer anti-fibrotic agents have been disappointing. While the inciting event(s) leading to the initiation of scar formation in UIP remain unknown, recent advances in our understanding of the mechanisms underlying both normal and aberrant wound healing have shed some light on pathogenetic mechanisms that may play significant roles in this disease. Unlike other fibrotic diseases of the lung, such as those associated with collagen vascular disease, occupational exposure, or chemotherapeutic agents, UIP is not associated with a significant inflammatory response; rather, dysregulated epithelial-mesenchymal interactions predominate. Identification of pathways crucial to fibrogenesis might offer potentially novel therapeutic targets to slow or halt the progression of IPF. This review focuses on evolving concepts of cellular and molecular mechanisms in the pathogenesis of UIP/IPF.
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Affiliation(s)
- Eric S White
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109-0642, USA.
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D'Angio CT, LoMonaco MB, Johnston CJ, Reed CK, Finkelstein JN. Differential roles for NF-kappa B in endotoxin and oxygen induction of interleukin-8 in the macrophage. Am J Physiol Lung Cell Mol Physiol 2004; 286:L30-6. [PMID: 12909591 DOI: 10.1152/ajplung.00360.2002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The alveolar macrophage is an important source of interleukin (IL)-8 during pulmonary injury. The IL-8 gene promoter sequence contains nuclear factor (NF)-kappa B, NF-IL6, and activator protein (AP)-1 binding sequences. These sites may have differing regulatory roles in hyperoxia-exposed macrophages than in those stimulated by bacterial lipopolysaccharide (LPS). U-937 and THP-1 macrophage-like cells were exposed to air-5% CO2 or 95% O2-5% CO2, with or without 1.0 microg/ml of LPS, and transfected with an IL-8 promoter-reporter containing NF-kappa B, NF-IL6, or AP-1 mutations. Hyperoxia and LPS caused additive increases in IL-8 production by U-937 cells, whereas THP-1 cells responded only to LPS. An NF-kappa B mutation ablated baseline and O2- and LPS-stimulated reporter activity in both cell lines, whereas NF-IL6 mutations had little effect. An AP-1 mutation had an intermediate effect. LPS, but not hyperoxia, stimulated nuclear translocation of NF-kappa B in both cell lines. Pharmacological blockade of NF-kappa B nuclear translocation ablated LPS-, but not hyperoxia-, stimulated IL-8 production. Although an intact promoter NF-kappa B site is crucial to macrophage IL-8 production, only LPS-stimulated production appears to require additional nuclear translocation of NF-kappa B.
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Affiliation(s)
- Carl T D'Angio
- Departmentof Pediatrics, Strong Children's Research Center, University of Rochester School of Medicine, NY 14642, USA.
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Strieter R, Belperio J, Keane M. CXC Chemokines in Angiogenesis Related to Pulmonary Fibrosis. LUNG BIOLOGY IN HEALTH AND DISEASE 2003. [DOI: 10.1201/b14211-13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Hope-Gill BDM, Hilldrup S, Davies C, Newton RP, Harrison NK. A study of the cough reflex in idiopathic pulmonary fibrosis. Am J Respir Crit Care Med 2003; 168:995-1002. [PMID: 12917229 DOI: 10.1164/rccm.200304-597oc] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Little is known about the pathogenesis of cough in idiopathic pulmonary fibrosis (IPF). We hypothesized that abnormalities of respiratory tract tachykinin-containing sensory nerves may be implicated. We studied cough response to capsaicin, substance P (SP), and bradykinin in 10 healthy control subjects and 10 patients with IPF. Six patients were tested before and after steroid therapy. Induced sputum cell counts and neurotrophic factor levels were also measured in 13 patients and 13 control subjects. The results show that cough sensitivity to capsaicin was greater in patients (p < 0.01). Neither SP nor bradykinin induced cough in normal subjects. SP and bradykinin induced cough in 7/10 patients (p < 0.002) and 2/10 patients (not significant) with IPF, respectively. Prednisolone caused a reduction in cough sensitivity to capsaicin (p < 0.05) and SP (p < 0.05) in all six patients treated. There were significantly more neutrophils (p = 0.001) and higher levels of nerve growth factor (p < 0.01) and brain-derived neurotrophic factor (p < 0.01) in patient's sputa. These findings suggest functional upregulation of lung sensory neurones in IPF. The cough response to inhaled SP in most patients may reflect disrupted respiratory epithelium. The response to corticosteroids demonstrates that the cough is amenable to therapy.
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Chilosi M, Poletti V, Zamò A, Lestani M, Montagna L, Piccoli P, Pedron S, Bertaso M, Scarpa A, Murer B, Cancellieri A, Maestro R, Semenzato G, Doglioni C. Aberrant Wnt/beta-catenin pathway activation in idiopathic pulmonary fibrosis. THE AMERICAN JOURNAL OF PATHOLOGY 2003; 162:1495-502. [PMID: 12707032 PMCID: PMC1851206 DOI: 10.1016/s0002-9440(10)64282-4] [Citation(s) in RCA: 543] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
To investigate the molecular events that may underpin dysfunctional repair processes that characterize idiopathic pulmonary fibrosis/usual interstitial pneumonia (IPF/UIP), we analyzed the expression patterns of beta-catenin on 20 IPF/UIP lung samples, together with two downstream target genes of Wnt signaling, cyclin-D1, and matrilysin. In 18 of 20 cases of IPF/UIP investigated on serial sections, nuclear beta-catenin immunoreactivity and abnormal levels of cyclin-D1 and matrilysin were demonstrated in proliferative bronchiolar lesions (basal-cell hyperplasia, squamous metaplasia, bronchiolization, honeycombing). The nature of these lesions was precisely defined using specific markers (DeltaN-p63, surfactant-protein-A, cytokeratin-5). Interestingly, nuclear beta-catenin accumulation was also demonstrated in fibroblast foci in most (16 of 20) IPF/UIP samples, often associated with bronchiolar lesions. Similar features were not observed in normal lung and other fibrosing pulmonary diseases (diffuse alveolar damage, organizing pneumonia, nonspecific interstitial pneumonia, desquamative interstitial pneumonia). Sequence analysis performed on DNA extracted from three samples of IPF/UIP did not reveal abnormalities affecting the beta-catenin gene. On the basis of these findings new models for IPF/UIP pathogenesis can be hypothesized, centered on the aberrant activation of Wnt/beta-catenin signaling, with eventual triggering of divergent epithelial regeneration at bronchiolo-alveolar junctions and epithelial-mesenchymal-transitions, leading to severe and irreversible remodeling of the pulmonary tissue.
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Affiliation(s)
- Marco Chilosi
- Department of Pathology, University of Verona, Verona, Italy.
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Chung YJ, Yang GH, Islam Z, Pestka JJ. Up-regulation of macrophage inflammatory protein-2 and complement 3A receptor by the trichothecenes deoxynivalenol and satratoxin G. Toxicology 2003; 186:51-65. [PMID: 12604170 DOI: 10.1016/s0300-483x(02)00605-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The trichothecenes are a group of mycotoxins that target leukocytes and have a wide range of immunomodulatory effects. Differential display analysis was applied to assess the effects of the trichothecenes deoxynivalenol (vomitoxin, DON) and satratoxin G (SG), on mRNA in the RAW 264.7 macrophage cell line. Cells were incubated with DON (1 microg/ml) or SG (5 ng/ml) for 2 h and total RNA then subjected to RT-PCR with a set of oligo(dT) primers. Resultant cDNA was amplified using an oligo (dT) downstream primer and an arbitrary decanucleotide upstream primer to make 35S-labeled PCR products. After separation of the products in denaturing polyacrylamide gel, 23 differentially expressed cDNA fragments were isolated and sequenced. Two of these were identified as known genes, namely, macrophage inflammatory protein-2 (MIP-2), a potent neutrophil chemoattractant involved in tissue injury and inflammation, and complement 3a receptor (C3aR), a proinflammatory mediator. Both MIP-2 and C3aR mRNAs were up-regulated by DON while only MIP-2 mRNA was induced by SG. Using commercially available antibodies, MIP-2 protein was also found to be induced by both DON and SG in RAW 264.7 cell cultures. When mice were treated with DON (12.5 mg/kg), splenic MIP-2 mRNA and serum MIP-2 levels were increased. MIP-2 mRNA and serum MIP-2 levels were synergistically increased when mice were co-treated with DON and LPS. Up-regulation of MIP-2 and C3aR are consistent with previous reports of trichothecene-induced inflammatory gene up-regulation and suggest that the specific genes affected may depend on trichothecene structures.
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Affiliation(s)
- Yong-Joo Chung
- Department of Food Science and Human Nutrition, 234 G M Trout Building, Michigan State University, East Lansing, MI 48824-1224, USA
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Abstract
There have been several new insights into the cause and treatment of sarcoidosis. Studies of genetic variation have shown that specific genetic polymorphisms are associated with increased risk of disease or affect disease presentation. These polymorphisms include variation of MHC and cytokines such as tumour necrosis factor (TNF). Not all investigators have come to the same conclusion, suggesting an interaction of various factors, including the patient's ethnic origin. Treatment of sarcoidosis varies considerably. Patients with symptomatic disease for more than 2-5 years have been of particular interest. Corticosteroids remain the standard of care in such cases, but immunosuppressive drugs have proved steroid-sparing in many patients. New agents, including pentoxifylline, thalidomide, and infliximab have proved useful in selected cases. The effectiveness of these agents seems to lie in their ability to block TNF, especially in the treatment of chronic disease.
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Affiliation(s)
- Robert P Baughman
- Department of Internal Medicine, University of Cincinnati, Cincinnati Medical Center, Cincinnati, OH 45267-0565, USA.
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Fujimori Y, Kataoka M, Tada S, Takehara H, Matsuo K, Miyake T, Okahara M, Yamadori I, Tanimoto M. The role of interleukin-8 in interstitial pneumonia. Respirology 2003; 8:33-40. [PMID: 12856739 DOI: 10.1046/j.1440-1843.2003.00420.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE A variety of inflammatory cells accumulate in the lungs of patients with interstitial lung disease. The potential for IL-8 to be released from these cells into the lungs of patients with idiopathic interstitial pneumonia (IIP), interstitial pneumonia with collagen vascular disease (IP-CVD), sarcoidosis (SAR) and hypersensitivity pneumonitis (HP) was investigated. METHODOLOGY IL-8 levels were assessed by enzyme-linked immunosorbent assay in BAL fluid and serum, and the expression of IL-8 in the lungs of these patients was evaluated by immunohistochemistry. RESULTS Serum IL-8 levels were significantly elevated in patients with IIP (P < 0.05) and SAR (P < 0.01). In BAL fluid, the IL-8 level was significantly higher in patients with IIP (P < 0.05), IP-CVD (P < 0.01), SAR (P < 0.01) and HP (P < 0.01). In several cases, IL-8 level correlated with neutrophil density. The IL-8 immunopositive cells were type II pulmonary epithelial cells and alveolar and interstitial macrophages in patients with IIP and IP-CVD. CONCLUSIONS IL-8 is likely to be a key factor in the pathogenesis of fibrosis of the lung and in lung injury.
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Affiliation(s)
- Yoshiaki Fujimori
- Department of Internal Medicine II, Okayama University Medical School, Okayama City, Okayama, Japan
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Abstract
Angiogenesis, defined as the growth of new capillaries from preexisting vessels, is a pervasive biological phenomenon that is at the core of many physiologic and pathologic processes. An opposing balance of angiogenic and angiostatic factors regulates angiogenesis. Examples of physiologic processes that depend on angiogenesis include embryogenesis, wound repair, and the ovarian/menstrual cycle. In contrast, chronic inflammation associated with chronic fibroproliferative disorders as well as growth and metastasis of solid tumors are associated with aberrant angiogenesis. CXC chemokines comprise a unique cytokine family that contains members that exhibit on a structural/functional basis either angiogenic or angiostatic biological activity. In this review, we will discuss the role of CXC chemokines and angiogenesis in pulmonary fibrosis.
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Affiliation(s)
- Robert M Strieter
- Department of Medicine, UCLA School of Medicine, Los Angeles, CA CA 90024-1922, USA.
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Takahashi T, Munakata M, Ohtsuka Y, Nisihara H, Nasuhara Y, Kamachi-Satoh A, Dosaka-Akita H, Homma Y, Kawakami Y. Expression and alteration of ras and p53 proteins in patients with lung carcinoma accompanied by idiopathic pulmonary fibrosis. Cancer 2002; 95:624-33. [PMID: 12209756 DOI: 10.1002/cncr.10708] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND The ras oncogene and the p53 tumor suppressor gene play important roles in the carcinogenic process of lung carcinoma. The authors evaluated whether alterations of the ras and p53 proteins may contribute to the development of lung carcinoma in patients with idiopathic pulmonary fibrosis (IPF) and whether such alterations may explain the high incidence of lung carcinoma among patients with IPF. METHODS Lung tissues were obtained from 35 patients who had IPF without complications of lung carcinoma and from 36 patients who had IPF with complications of lung carcinoma. Altered expression of ras and p53 proteins was evaluated by immunohistochemistry, and mutations of both genes were evaluated by polymerase chain reaction-single strand conformation polymorphism and sequencing analyses. RESULTS The frequency of expression of ras protein in type II alveolar pneumocytes was significantly greater in lung tissues from patients with IPF who had lung carcinoma compared with lung tissues from patients with IPF who did not have lung carcinoma (75% vs. 40%, respectively; P < 0.01). K-ras point mutation in codon 12 (GGT to GTT transversion) was detected in lung tissue with interstitial pneumonia, in which ras protein was overexpressed in type II alveolar pneumocytes obtained from 2 of 41 patients with IPF complicated by lung carcinoma, causing amino acid substitution (Gly to Val) in both patients. A p53 mutation was detected in three of six lung tissue samples from patients who had IPF lung with positive p53 immunoreactivity, and multiple mutations were detected in two samples. CONCLUSIONS Expression of ras protein in type II alveolar pneumocytes and mutation in the codon 12 of K-ras gene in lung tissue may contribute to the induction of lung carcinoma in patients with IPF. Furthermore, the presence of multiple mutations in the p53 gene may explain the high incidence lung carcinoma in patients with IPF.
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Affiliation(s)
- Toru Takahashi
- First Department of Medicine, School of Medicine, Hokkaido University, N-15, W-7, Kita-ku, Sapporo 060-8638, Japan.
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