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Dong Y, He L, Zhu Z, Yang F, Ma Q, Zhang Y, Zhang X, Liu X. The mechanism of gut-lung axis in pulmonary fibrosis. Front Cell Infect Microbiol 2024; 14:1258246. [PMID: 38362497 PMCID: PMC10867257 DOI: 10.3389/fcimb.2024.1258246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 01/16/2024] [Indexed: 02/17/2024] Open
Abstract
Pulmonary fibrosis (PF) is a terminal change of a lung disease that is marked by damage to alveolar epithelial cells, abnormal proliferative transformation of fibroblasts, excessive deposition of extracellular matrix (ECM), and concomitant inflammatory damage. Its characteristics include short median survival, high mortality rate, and limited treatment effectiveness. More in-depth studies on the mechanisms of PF are needed to provide better treatment options. The idea of the gut-lung axis has emerged as a result of comprehensive investigations into the microbiome, metabolome, and immune system. This theory is based on the material basis of microorganisms and their metabolites, while the gut-lung circulatory system and the shared mucosal immune system act as the connectors that facilitate the interplay between the gastrointestinal and respiratory systems. The emergence of a new view of the gut-lung axis is complementary and cross-cutting to the study of the mechanisms involved in PF and provides new ideas for its treatment. This article reviews the mechanisms involved in PF, the gut-lung axis theory, and the correlation between the two. Exploring the gut-lung axis mechanism and treatments related to PF from the perspectives of microorganisms, microbial metabolites, and the immune system. The study of the gut-lung axis and PF is still in its early stages. This review systematically summarizes the mechanisms of PF related to the gut-lung axis, providing ideas for subsequent research and treatment of related mechanisms.
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Affiliation(s)
- Yawei Dong
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Lanlan He
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Zhongbo Zhu
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Fan Yang
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Quan Ma
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Respiratory Medicine, Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Yanmei Zhang
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Xuhui Zhang
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Respiratory Medicine, Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Xiping Liu
- Key Laboratory of Gansu Provincial Prescription Mining and Innovative Translational Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Gansu Provincial Traditional Chinese Medicine New Product Creation Engineering Laboratory, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
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Diwan R, Bhatt HN, Beaven E, Nurunnabi M. Emerging delivery approaches for targeted pulmonary fibrosis treatment. Adv Drug Deliv Rev 2024; 204:115147. [PMID: 38065244 PMCID: PMC10787600 DOI: 10.1016/j.addr.2023.115147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 11/02/2023] [Accepted: 11/29/2023] [Indexed: 01/01/2024]
Abstract
Pulmonary fibrosis (PF) is a progressive, and life-threatening interstitial lung disease which causes scarring in the lung parenchyma and thereby affects architecture and functioning of lung. It is an irreversible damage to lung functioning which is related to epithelial cell injury, immense accumulation of immune cells and inflammatory cytokines, and irregular recruitment of extracellular matrix. The inflammatory cytokines trigger the differentiation of fibroblasts into activated fibroblasts, also known as myofibroblasts, which further increase the production and deposition of collagen at the injury sites in the lung. Despite the significant morbidity and mortality associated with PF, there is no available treatment that efficiently and effectively treats the disease by reversing their underlying pathologies. In recent years, many therapeutic regimens, for instance, rho kinase inhibitors, Smad signaling pathway inhibitors, p38, BCL-xL/ BCL-2 and JNK pathway inhibitors, have been found to be potent and effective in treating PF, in preclinical stages. However, due to non-selectivity and non-specificity, the therapeutic molecules also result in toxicity mediated severe side effects. Hence, this review demonstrates recent advances on PF pathology, mechanism and targets related to PF, development of various drug delivery systems based on small molecules, RNAs, oligonucleotides, peptides, antibodies, exosomes, and stem cells for the treatment of PF and the progress of various therapeutic treatments in clinical trials to advance PF treatment.
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Affiliation(s)
- Rimpy Diwan
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Texas El Paso, El Paso, TX 79902, United States; Department of Biomedical Engineering, College of Engineering, The University of Texas El Paso, El Paso, TX 79968, United States
| | - Himanshu N Bhatt
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Texas El Paso, El Paso, TX 79902, United States; Department of Biomedical Engineering, College of Engineering, The University of Texas El Paso, El Paso, TX 79968, United States
| | - Elfa Beaven
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Texas El Paso, El Paso, TX 79902, United States; Department of Biomedical Engineering, College of Engineering, The University of Texas El Paso, El Paso, TX 79968, United States
| | - Md Nurunnabi
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Texas El Paso, El Paso, TX 79902, United States; Department of Biomedical Engineering, College of Engineering, The University of Texas El Paso, El Paso, TX 79968, United States; The Border Biomedical Research Center, The University of Texas El Paso, El Paso, TX 79968, United States.
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Hamdi E, Bekhit AA, Higazi A, Ahmed ABF, Hussein Kasem A, Najim MA, Alshammari TM, Thabet K. Interferon-λ3 rs12979860 can regulate inflammatory cytokines production in pulmonary fibrosis. Saudi Pharm J 2023; 31:101816. [PMID: 37876736 PMCID: PMC10590737 DOI: 10.1016/j.jsps.2023.101816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/01/2023] [Indexed: 10/26/2023] Open
Abstract
Pulmonary fibrosis (PF) is the last phase of interstitial lung diseases (ILDs), which are a collection of pulmonary illnesses marked by parenchymal remodeling and scarring. Treatment can only halt the functional decline of the lung, raising the necessity of identifying the basic processes implicated in lung fibrogenesis. The Interferon lambda-3 (IFNL3) gene variant, rs12979860, was determined to be related to an elevated risk of fibrosis in different organs, but the mechanism through which it mediates fibrogenesis is not clear. In the current research, we aim to figure out some of the mechanistic pathways by which IFN-λ3 mediates ILDs. 100 healthy controls and 74 ILD patients were genotyped for IFNL3 rs12979860. Then the mRNA expression of IFNL3 and some other proinflammatory mediators was examined according to genotype in the peripheral blood mononuclear cells (PBMCs) of ILDs patients. The IFNL3 rs12979860 genotype distribution of healthy individuals and ILDs patients was shown to be in Hardy-Weinberg equilibrium (HWE) with a minor allele frequency (MAF) of 0.293 and 0.326, respectively. Furthermore, the CC genotype was demonstrated to be linked to enhanced IFNL3 expression. Also, the CC genotype was linked to an increase in the mRNA expression of TLR4 (P = 0.03) and the inflammatory cytokines IL-1β and TNF-α (P = 0.01 and 0.04, respectively) and had no effect on the NF-kB level (P = 0.3). From these results, we can deduce that IFN-λ3 may mediate tissue fibrosis via increasing the expression of IFN-λ3 itself and other proinflammatory mediators. This stimulates a self-sustaining loop mechanism which includes a reciprocal production of IFN-λ3, TLR4, IL-1β, and TNF-α leading to persistent inflammation and fibrosis.
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Affiliation(s)
- Eman Hamdi
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | - Amany A. Bekhit
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | - Aliaa Higazi
- Department of Clinical Pathology, Faculty of Medicine, Minia University, Minia 61519, Egypt
| | - Abo Bakr F. Ahmed
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | - Ahmed Hussein Kasem
- Department of Chest Diseases, Faculty of Medicine, Minia University, Minia 61519, Egypt
| | - Mustafa A.M. Najim
- Department of Medical Laboratories Technology, Faculty of Applied Medical Sciences, Taibah University, Medina, Saudi Arabia
| | - Thamir M. Alshammari
- Medication Safety Research Chair, King Saud University, Riyadh, Saudi Arabia
- College of pharmacy, Almaarefa University, Riyadh, Saudi Arabia
| | - Khaled Thabet
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
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Li Y, Xu M, Zhai H, Yang C, Yang J, Ke Z, Chen W, Ou J, Sha Z, Xiao Q. Lipopolysaccharide (LPS) extracted from Bacteroides vulgatus effectively prevents LPS extracted from Escherichia coli from inducing epithelial‑mesenchymal transition. Mol Med Rep 2023; 28:195. [PMID: 37681466 PMCID: PMC10502948 DOI: 10.3892/mmr.2023.13082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 08/09/2023] [Indexed: 09/09/2023] Open
Abstract
Pathological epithelial‑mesenchymal transition (EMT) has been shown to fulfill a key role in the development and progression of a variety of lung diseases. It has been demonstrated that the inflammatory microenvironment is a decisive factor in inducing pathological EMT. Hexacylated lipopolysaccharide (LPS) [or proacylated lipopolysaccharide (P‑LPS), which functions as proinflammatory lipopolysaccharide] is one of the most effective Toll‑like receptor 4 (TLR4) agonists. Furthermore, the pentacylated and tetracylated form of lipopolysaccharide (or A‑LPS, which functions as anti‑inflammatory lipopolysaccharide) has been shown to elicit competitive antagonistic effects against the pro‑inflammatory activity of P‑LPS. At present, it remains unclear whether LPS extracted from Bacteroides vulgatus (BV‑LPS) can prevent LPS extracted from Escherichia coli (EC‑LPS) from inducing pathological EMT. In the present study, A549 cells and C57BL/6 mice lung tissue were both induced by EC‑LPS (P‑LPS) and BV‑LPS (A‑LPS), either alone or in combination. The anticipated anti‑inflammatory effects of BV‑LPS were analyzed by examining the lung coefficient, lung pathology, A549 cell morphology and expression levels both of the inflammatory cytokines, IL‑1β, IL‑6 and TNF‑α and of the EMT signature proteins, epithelial cadherin (E‑cadherin), α‑smooth muscle actin (α‑SMA) and vimentin. In addition, the expression levels of TLR4, bone morphogenic protein and activin membrane‑bound inhibitor (BAMBI) and Snail were detected and the possible mechanism underlying how BV‑LPS may prevent EC‑LPS‑induced EMT was analyzed. The results obtained showed that the morphology of the A549 cells was significantly polarized, the lung index was significantly increased, the alveolar structure was collapsed and the expression levels of IL‑1β, IL‑6, TNF‑α, α‑SMA, vimentin, TLR4 and Snail in both lung tissue and A549 cells were significantly increased, whereas those of E‑cadherin and BAMBI were significantly decreased. Treatment with BV‑LPS in combination with EC‑LPS was found to reverse these changes. In conclusion, the present study demonstrated that BV‑LPS is able to effectively prevent EC‑LPS‑induced EMT in A549 cells and in mouse lung tissue and furthermore, the underlying mechanism may be associated with inhibition of the TLR4/BAMBI/Snail signaling pathway.
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Affiliation(s)
- Yuping Li
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Mengdan Xu
- Shizhen College, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550200, P.R. China
| | - Haiying Zhai
- The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550000, P.R. China
| | - Changfu Yang
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Jiaotong Yang
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Zunli Ke
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Wanhao Chen
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Jiangqin Ou
- The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550000, P.R. China
| | - Zongge Sha
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
| | - Qiaoqiao Xiao
- Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
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Zerikiotis S, Efentakis P, Dapola D, Agapaki A, Seiradakis G, Kostomitsopoulos N, Skaltsounis AL, Tseti I, Triposkiadis F, Andreadou I. Synergistic Pulmonoprotective Effect of Natural Prolyl Oligopeptidase Inhibitors in In Vitro and In Vivo Models of Acute Respiratory Distress Syndrome. Int J Mol Sci 2023; 24:14235. [PMID: 37762537 PMCID: PMC10531912 DOI: 10.3390/ijms241814235] [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: 08/23/2023] [Revised: 09/13/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a highly morbid inflammatory lung disease with limited pharmacological interventions. The present study aims to evaluate and compare the potential pulmonoprotective effects of natural prolyl oligopeptidase (POP) inhibitors namely rosmarinic acid (RA), chicoric acid (CA), epigallocatechin-3-gallate (EGCG) and gallic acid (GA), against lipopolysaccharide (LPS)-induced ARDS. Cell viability and expression of pro-inflammatory mediators were measured in RAW264.7 cells and in primary murine lung epithelial and bone marrow cells. Nitric oxide (NO) production was also assessed in unstimulated and LPS-stimulated RAW264.7 cells. For subsequent in vivo experiments, the two natural products (NPs) with the most favorable effects, RA and GA, were selected. Protein, cell content and lipid peroxidation levels in bronchoalveolar lavage fluid (BALF), as well as histopathological changes and respiratory parameters were evaluated in LPS-challenged mice. Expression of key mediators involved in ARDS pathophysiology was detected by Western blotting. RA and GA favorably reduced gene expression of pro-inflammatory mediators in vitro, while GA decreased NO production in macrophages. In LPS-challenged mice, RA and GA co-administration improved respiratory parameters, reduced cell and protein content and malondialdehyde (MDA) levels in BALF, decreased vascular cell adhesion molecule-1 (VCAM-1) and the inducible nitric oxide synthase (iNOS) protein expression, activated anti-apoptotic mechanisms and down-regulated POP in the lung. Conclusively, these synergistic pulmonoprotective effects of RA and GA co-administration could render them a promising prophylactic/therapeutic pharmacological intervention against ARDS.
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Affiliation(s)
- Stelios Zerikiotis
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (S.Z.); (P.E.); (D.D.); (G.S.)
| | - Panagiotis Efentakis
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (S.Z.); (P.E.); (D.D.); (G.S.)
| | - Danai Dapola
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (S.Z.); (P.E.); (D.D.); (G.S.)
| | - Anna Agapaki
- Histochemistry Facility, Biomedical Research Foundation of the Academy of Athens, 115 27 Athens, Greece;
| | - Georgios Seiradakis
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (S.Z.); (P.E.); (D.D.); (G.S.)
| | - Nikolaos Kostomitsopoulos
- Laboratory Animal Facility, Centre of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 115 27 Athens, Greece;
| | - Alexios-Leandros Skaltsounis
- Section of Pharmacognosy and Natural Product Chemistry Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece;
| | | | - Filippos Triposkiadis
- Department of Cardiology, University General Hospital of Larissa, 413 34 Larissa, Greece;
- Faculty of Health Sciences, University of Thessaly, 413 34 Larissa, Greece
| | - Ioanna Andreadou
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (S.Z.); (P.E.); (D.D.); (G.S.)
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Alan E, Daldaban F, Alan A, Aksel EG, Orhan İ, Ulaş Çinar M, Akyüz B, Arslan K. TLR4, MyD88, and TNF-α Expression in the Lungs of Akkaraman and Romanov Lambs in Response to LPS and LTA. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2023; 29:1488-1502. [PMID: 37488827 DOI: 10.1093/micmic/ozad071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/19/2023] [Accepted: 06/18/2023] [Indexed: 07/26/2023]
Abstract
Toll-like receptors are involved in the recognition of bacterial toxins, which cause infection in the respiratory system. This study aimed to evaluate microanatomical and histological alterations in the lungs of 24 healthy Akkaraman and Romanov lambs after the administration of lipoteichoic acid (LTA), lipopolysaccharide (LPS), and LTA + LPS and investigate the gene, protein, and immune expression levels of TLR4, MyD88, and TNF-α molecules, known to have immune functions. Microanatomical examinations showed thickened peribronchial and alveolar walls in the lungs of groups LTA, LPS, and LTA + LPS of both breeds due to immune cell infiltration. TLR4, MyD88, and TNF-α immunoexpressions were positive to varying degrees in the cytoplasm and nucleus of the bronchial and bronchiolar luminal epithelial cells, alveolar epithelial cells, and alveolar macrophages. TLR4 and TNF-α protein expressions were statistically different in the LPS-treated Romanov lambs, compared to the other groups. Among the Akkaraman lambs, TLR4 gene expression was significantly higher in group LPS, and among the Romanov lambs, TLR4, MyD88, and TNF-α gene expressions were significantly higher in group LTA + LPS. Therefore, TLR4, MyD88, and TNF-α molecules, involved in the immune response, were found to be expressed at different levels against LTA and LPS in the lungs of two different sheep breeds.
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Affiliation(s)
- Emel Alan
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Fadime Daldaban
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Aydın Alan
- Department of Anatomy, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Esma Gamze Aksel
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - İmdat Orhan
- Department of Anatomy, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Mehmet Ulaş Çinar
- Department of Animal Science, Faculty of Agriculture, Erciyes University, 38039 Kayseri, Turkey
- Department of Veterinary Microbiology & Pathology, Washington State University, Pullman, WA 99164, USA
| | - Bilal Akyüz
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Korhan Arslan
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
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Repositioning itraconazole for amelioration of bleomycin-induced pulmonary fibrosis: Targeting HMGB1/TLR4 Axis, NLRP3 inflammasome/NF-κB signaling, and autophagy. Life Sci 2023; 313:121288. [PMID: 36528079 DOI: 10.1016/j.lfs.2022.121288] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/07/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS Bleomycin (BLM) is one of the antitumor medications that had proven efficacy in the treatment of a wide range of malignant conditions. Pulmonary fibrosis which is frequently encountered during the course of bleomycin therapy may significantly reduce the potential efficacy of bleomycin in cancer therapy. This study tested the hypothesis that itraconazole may have mitigating effects on BLM-induced pulmonary fibrosis and tried to delineate the potential mechanisms of these effects. MATERIALS AND METHODS In a rat model of pulmonary fibrosis elicited by BLM, the effect of different doses of itraconazole was explored at the biochemical, histopathological, and electron microscopic levels. KEY FINDINGS Itraconazole, in a dose-dependent manner, exhibited significant effects on the pro-oxidant/antioxidant balance, the inflammatory consequences, high-mobility group box 1/toll-like receptor-4 Axis, autophagy and nuclear factor kappa B/Nod-like receptor protein 3 inflammasome signaling and alleviated the histopathological, immunohistochemical, and electron microscopic perturbations induced by BLM in the pulmonary tissues. SIGNIFICANCE In view of the afore-mentioned data, itraconazole may be a promising drug that efficiently mitigates the deleterious effects of BLM on the pulmonary tissues.
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Ding Q, Wang Y, Yang C, Li X, Yu X. Clinical Utility of the Sivelestat for the Treatment of ALI/ARDS: Moving on in the Controversy? INTENSIVE CARE RESEARCH 2023; 3:12-17. [PMID: 36911225 PMCID: PMC9412801 DOI: 10.1007/s44231-022-00012-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/27/2022] [Indexed: 01/08/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a serious condition that can arise following direct or indirect acute lung injury (ALI). It is heterogeneous and has a high mortality rate. Supportive care is the mainstay of treatment and there is no definitive pharmacological treatment as yet. In nonclinical studies, neutrophil elastase inhibitor sivelestat appears to show benefit in ARDS without inhibiting the host immune defense in cases of infection. In clinical studies, the efficacy of sivelestat in the treatment of ARDS remains controversial. The currently available evidence suggests that sivelestat may show some benefit in the treatment of ARDS, although large, randomized controlled trials are needed in specific pathophysiological conditions to explore these potential benefits.
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Affiliation(s)
- Qiongli Ding
- Critical Medicine Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China
| | - Yi Wang
- Critical Medicine Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Uygur Autonomous Region Institute of Critical Medicine, Urumqi, 830054 Xinjiang Uygur Autonomous Region China
| | - Chunbo Yang
- Critical Medicine Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Uygur Autonomous Region Institute of Critical Medicine, Urumqi, 830054 Xinjiang Uygur Autonomous Region China
| | - Xiang Li
- Critical Medicine Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Uygur Autonomous Region Institute of Critical Medicine, Urumqi, 830054 Xinjiang Uygur Autonomous Region China
| | - Xiangyou Yu
- Critical Medicine Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Medical University, Urumqi, 830054 Xinjiang Uygur Autonomous Region China.,Xinjiang Uygur Autonomous Region Institute of Critical Medicine, Urumqi, 830054 Xinjiang Uygur Autonomous Region China
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9
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Liu X, Lu F, Chen X. Examination of the role of necroptotic damage-associated molecular patterns in tissue fibrosis. Front Immunol 2022; 13:886374. [PMID: 36110858 PMCID: PMC9468929 DOI: 10.3389/fimmu.2022.886374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 08/08/2022] [Indexed: 11/29/2022] Open
Abstract
Fibrosis is defined as the abnormal and excessive deposition of extracellular matrix (ECM) components, which leads to tissue or organ dysfunction and failure. However, the pathological mechanisms underlying fibrosis remain unclear. The inflammatory response induced by tissue injury is closely associated with tissue fibrosis. Recently, an increasing number of studies have linked necroptosis to inflammation and fibrosis. Necroptosis is a type of preprogrammed death caused by death receptors, interferons, Toll-like receptors, intracellular RNA and DNA sensors, and other mediators. These activate receptor-interacting protein kinase (RIPK) 1, which recruits and phosphorylates RIPK3. RIPK3 then phosphorylates a mixed lineage kinase domain-like protein and causes its oligomerization, leading to rapid plasma membrane permeabilization, the release of cellular contents, and exposure of damage-associated molecular patterns (DAMPs). DAMPs, as inflammatory mediators, are involved in the loss of balance between extensive inflammation and tissue regeneration, leading to remodeling, the hallmark of fibrosis. In this review, we discuss the role of necroptotic DAMPs in tissue fibrosis and highlight the inflammatory responses induced by DAMPs in tissue ECM remodeling. By summarizing the existing literature on this topic, we underscore the gaps in the current research, providing a framework for future investigations into the relationship among necroptosis, DAMPs, and fibrosis, as well as a reference for later transformation into clinical treatment.
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Affiliation(s)
| | - Feng Lu
- *Correspondence: Feng Lu, ; Xihang Chen,
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10
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Oxy210, a Semi-Synthetic Oxysterol, Exerts Anti-Inflammatory Effects in Macrophages via Inhibition of Toll-like Receptor (TLR) 4 and TLR2 Signaling and Modulation of Macrophage Polarization. Int J Mol Sci 2022; 23:ijms23105478. [PMID: 35628290 PMCID: PMC9141227 DOI: 10.3390/ijms23105478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/04/2022] [Accepted: 05/11/2022] [Indexed: 02/06/2023] Open
Abstract
Inflammatory responses by the innate and adaptive immune systems protect against infections and are essential to health and survival. Many diseases including atherosclerosis, osteoarthritis, rheumatoid arthritis, psoriasis, and obesity involve persistent chronic inflammation. Currently available anti-inflammatory agents, including non-steroidal anti-inflammatory drugs, steroids, and biologics, are often unsafe for chronic use due to adverse effects. The development of effective non-toxic anti-inflammatory agents for chronic use remains an important research arena. We previously reported that oral administration of Oxy210, a semi-synthetic oxysterol, ameliorates non-alcoholic steatohepatitis (NASH) induced by a high-fat diet in APOE*3-Leiden.CETP humanized mouse model of NASH and inhibits expression of hepatic and circulating levels of inflammatory cytokines. Here, we show that Oxy210 also inhibits diet-induced white adipose tissue inflammation in APOE*3-Leiden.CETP mice, evidenced by the inhibition of adipose tissue expression of IL-6, MCP-1, and CD68 macrophage marker. Oxy210 and related analogs exhibit anti-inflammatory effects in macrophages treated with lipopolysaccharide in vitro, mediated through inhibition of toll-like receptor 4 (TLR4), TLR2, and AP-1 signaling, independent of cyclooxygenase enzymes or steroid receptors. The anti-inflammatory effects of Oxy210 are correlated with the inhibition of macrophage polarization. We propose that Oxy210 and its structural analogs may be attractive candidates for future therapeutic development for targeting inflammatory diseases.
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Xu Q, Mei S, Nie F, Zhang Z, Feng J, Zhang J, Qian X, Gao Y, He Z, Xing S. The role of macrophage-fibroblast interaction in lipopolysaccharide-induced pulmonary fibrosis: an acceleration in lung fibroblast aerobic glycolysis. J Transl Med 2022; 102:432-439. [PMID: 34775492 DOI: 10.1038/s41374-021-00701-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/22/2021] [Accepted: 10/22/2021] [Indexed: 11/09/2022] Open
Abstract
Recent evidence has shown that lipopolysaccharide (LPS)-induced aerobic glycolysis of lung fibroblasts is closely associated with the pathogenesis of septic pulmonary fibrosis. Nevertheless, the underlying mechanism remains poorly defined. In this study, we demonstrate that LPS promotes c-Jun N-terminal kinase (JNK) signaling pathway activation and endogenous tumor necrosis factor-α (TNF-α) secretion in pulmonary macrophages. This, in turn, could significantly promote aerobic glycolysis and increase lactate production in lung fibroblasts through 6-phosphofructo-2-kinase/fructose-2, 6-biphosphatase 3 (PFKFB3) activation. Culturing human lung fibroblast MRC-5 cell line with TNF-α or endogenous TNF-α (cell supernatants of macrophages after LPS stimulation) both enhanced the aerobic glycolysis and increased lactate production. These effects could be prevented by treating macrophages with JNK pathway inhibitor, by administering TNF-α receptor 1 (TNFR1) siRNA, PFKFB3 inhibitor, or by silencing PFKFB3 with fibroblasts-specific shRNA. In addition, the inhibition of TNF-α secretion and PFKFB3 expression prevented LPS-induced pulmonary fibrosis in vivo. In conclusion, this study revealed that LPS-induced macrophage secretion of TNF-α could initiate fibroblast aerobic glycolysis and lactate production, implying that inflammation-metabolism interactions between lung macrophages and fibroblasts might play an essential role in LPS-induced pulmonary fibrosis.
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Affiliation(s)
- Qiaoyi Xu
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuya Mei
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fang Nie
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhiyun Zhang
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Junqi Feng
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinyuan Zhang
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiaoqing Qian
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan Gao
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhengyu He
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Shunpeng Xing
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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12
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Ishikawa G, Liu A, Herzog EL. Evolving Perspectives on Innate Immune Mechanisms of IPF. Front Mol Biosci 2021; 8:676569. [PMID: 34434962 PMCID: PMC8381017 DOI: 10.3389/fmolb.2021.676569] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/29/2021] [Indexed: 12/29/2022] Open
Abstract
While epithelial-fibroblast interactions are viewed as the primary drivers of Idiopathic Pulmonary Fibrosis (IPF), evidence gleaned from animal modeling and human studies implicates innate immunity as well. To provide perspective on this topic, this review synthesizes the available data regarding the complex role of innate immunity in IPF. The role of substances present in the fibrotic microenvironment including pathogen associated molecular patterns (PAMPs) derived from invading or commensal microbes, and danger associated molecular patterns (DAMPs) derived from injured cells and tissues will be discussed along with the proposed contribution of innate immune populations such as macrophages, neutrophils, fibrocytes, myeloid suppressor cells, and innate lymphoid cells. Each component will be considered in the context of its relationship to environmental and genetic factors, disease outcomes, and potential therapies. We conclude with discussion of unanswered questions and opportunities for future study in this area.
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Affiliation(s)
- Genta Ishikawa
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
| | - Angela Liu
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
| | - Erica L. Herzog
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States,Department of Pathology, Yale School of Medicine, New Haven, CT, United States,*Correspondence: Erica L. Herzog,
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13
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The interplay of DAMPs, TLR4, and proinflammatory cytokines in pulmonary fibrosis. J Mol Med (Berl) 2021; 99:1373-1384. [PMID: 34258628 PMCID: PMC8277227 DOI: 10.1007/s00109-021-02113-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 06/29/2021] [Accepted: 07/05/2021] [Indexed: 02/07/2023]
Abstract
Pulmonary fibrosis is a chronic debilitating condition characterized by progressive deposition of connective tissue, leading to a steady restriction of lung elasticity, a decline in lung function, and a median survival of 4.5 years. The leading causes of pulmonary fibrosis are inhalation of foreign particles (such as silicosis and pneumoconiosis), infections (such as post COVID-19), autoimmune diseases (such as systemic autoimmune diseases of the connective tissue), and idiopathic pulmonary fibrosis. The therapeutics currently available for pulmonary fibrosis only modestly slow the progression of the disease. This review is centered on the interplay of damage-associated molecular pattern (DAMP) molecules, Toll-like receptor 4 (TLR4), and inflammatory cytokines (such as TNF-α, IL-1β, and IL-17) as they contribute to the pathogenesis of pulmonary fibrosis, and the possible avenues to develop effective therapeutics that disrupt this interplay.
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Planté-Bordeneuve T, Pilette C, Froidure A. The Epithelial-Immune Crosstalk in Pulmonary Fibrosis. Front Immunol 2021; 12:631235. [PMID: 34093523 PMCID: PMC8170303 DOI: 10.3389/fimmu.2021.631235] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 05/04/2021] [Indexed: 12/12/2022] Open
Abstract
Interactions between the lung epithelium and the immune system involve a tight regulation to prevent inappropriate reactions and have been connected to several pulmonary diseases. Although the distal lung epithelium and local immunity have been implicated in the pathogenesis and disease course of idiopathic pulmonary fibrosis (IPF), consequences of their abnormal interplay remain less well known. Recent data suggests a two-way process, as illustrated by the influence of epithelial-derived periplakin on the immune landscape or the effect of macrophage-derived IL-17B on epithelial cells. Additionally, damage associated molecular patterns (DAMPs), released by damaged or dying (epithelial) cells, are augmented in IPF. Next to “sterile inflammation”, pathogen-associated molecular patterns (PAMPs) are increased in IPF and have been linked with lung fibrosis, while outer membrane vesicles from bacteria are able to influence epithelial-macrophage crosstalk. Finally, the advent of high-throughput technologies such as microbiome-sequencing has allowed for the identification of a disease-specific microbial environment. In this review, we propose to discuss how the interplays between the altered distal airway and alveolar epithelium, the lung microbiome and immune cells may shape a pro-fibrotic environment. More specifically, it will highlight DAMPs-PAMPs pathways and the specificities of the IPF lung microbiome while discussing recent elements suggesting abnormal mucosal immunity in pulmonary fibrosis.
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Affiliation(s)
- Thomas Planté-Bordeneuve
- Pôle de pneumologie, O.R.L. et dermatologie, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Bruxelles, Belgium
| | - Charles Pilette
- Pôle de pneumologie, O.R.L. et dermatologie, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Bruxelles, Belgium.,Service de pneumologie, Cliniques universitaires Saint-Luc, Bruxelles, Belgium
| | - Antoine Froidure
- Pôle de pneumologie, O.R.L. et dermatologie, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Bruxelles, Belgium.,Service de pneumologie, Cliniques universitaires Saint-Luc, Bruxelles, Belgium
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15
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Macrophage Autophagy and Silicosis: Current Perspective and Latest Insights. Int J Mol Sci 2021; 22:ijms22010453. [PMID: 33466366 PMCID: PMC7795780 DOI: 10.3390/ijms22010453] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 12/16/2022] Open
Abstract
Silicosis is an urgent public health problem in many countries. Alveolar macrophage (AM) plays an important role in silicosis progression. Autophagy is a balanced mechanism for regulating the cycle of synthesis and degradation of cellular components. Our previous study has shown that silica engulfment results in lysosomal rupture, which may lead to the accumulation of autophagosomes in AMs of human silicosis. The excessive accumulation of autophagosomes may lead to apoptosis in AMs. Herein, we addressed some assumptions concerning the complex function of autophagy-related proteins on the silicosis pathogenesis. We also recapped the molecular mechanism of several critical proteins targeting macrophage autophagy in the process of silicosis fibrosis. Furthermore, we summarized several exogenous chemicals that may cause an aggravation or alleviation for silica-induced pulmonary fibrosis by regulating AM autophagy. For example, lipopolysaccharides or nicotine may have a detrimental effect combined together with silica dust via exacerbating the blockade of AM autophagic degradation. Simultaneously, some natural product ingredients such as atractylenolide III, dioscin, or trehalose may be the potential AM autophagy regulators, protecting against silicosis fibrosis. In conclusion, the deeper molecular mechanism of these autophagy targets should be explored in order to provide feasible clues for silicosis therapy in the clinical setting.
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16
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Manfredi A, Luppi F, Cassone G, Vacchi C, Salvarani C, Sebastiani M. Pathogenesis and treatment of idiopathic and rheumatoid arthritis-related interstitial pneumonia. The possible lesson from COVID-19 pneumonia. Expert Rev Clin Immunol 2020; 16:751-770. [PMID: 32722946 PMCID: PMC7594185 DOI: 10.1080/1744666x.2020.1803064] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 07/27/2020] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Main clinical manifestations of SARS-CoV-2 infection are characterized by fever, dyspnea, and interstitial pneumonia, frequently evolving in acute respiratory distress syndrome (ARDS). AREAS COVERED Features of coronavirus disease 2019 (COVID-19) presents some common points with interstitial lung disease (ILD) both idiopathic and related to rheumatoid arthritis (RA), typically characterized by a chronic progression over time and possibly complicated by acute exacerbation (AE). The study of common pathogenetic mechanisms, such as the involvement of toll-like receptor 4, could contribute to the knowledge and treatment of idiopathic and RA-ILD. Moreover, hyperinflammation, mainly characterized by increase of effector T-cells and inflammatory cytokines, and activation of coagulation cascade, observed in COVID-19 related ARDS have been already shown in patients with AE of idiopathic and RA-ILD. A literature search was performed in PubMed, Embase, Scopus, and Web of Science, together with a manual search in COVID-resource centers of the main journals. EXPERT OPINION Despite the uncertainty about pathogenetic aspects about COVID-19- pneumonia, it could be a possible model for other forms of ILD and AE. The great amount of data from studies on COVID-19 could be helpful in proposing safe therapeutic approaches for RA-ILD, in understanding pathogenesis of usual interstitial pneumonia and to develop new therapeutic strategies for AE.
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Affiliation(s)
- A Manfredi
- Rheumatology Unit, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico Di Modena, Modena, Italy
| | - F Luppi
- Department of Medicine and Surgery, University of Milan Bicocca, Respiratory Unit, San Gerardo Hospital, ASST Monza, Monza, Italy
| | - G Cassone
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, Modena, Italy
- Rheumatology Unit, Santa Maria Hospital, IRCCS, Reggio Emilia, Italy
| | - C Vacchi
- Rheumatology Unit, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico Di Modena, Modena, Italy
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, Modena, Italy
| | - C Salvarani
- Rheumatology Unit, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico Di Modena, Modena, Italy
- Rheumatology Unit, Santa Maria Hospital, IRCCS, Reggio Emilia, Italy
| | - M Sebastiani
- Rheumatology Unit, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico Di Modena, Modena, Italy
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Giovannetti A, Straface E, Rosato E, Casciaro M, Pioggia G, Gangemi S. Role of Alarmins in the Pathogenesis of Systemic Sclerosis. Int J Mol Sci 2020; 21:ijms21144985. [PMID: 32679721 PMCID: PMC7404317 DOI: 10.3390/ijms21144985] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/10/2020] [Accepted: 07/14/2020] [Indexed: 12/22/2022] Open
Abstract
Systemic sclerosis (SSc) is a rare chronic autoimmune disease associated with significant morbidity and mortality. Two main subsets of SSc are recognized: (i) diffuse cutaneous SSc with rapidly progressive fibrosis of the skin, lungs, and other internal organs; and (ii) limited cutaneous SSc, which is dominated by vascular manifestations, with skin and organ fibrosis generally limited and slowly progressing. In spite of intense investigation, both etiology and pathogenesis of SSc are still unknown. Genetic and environmental factors, as well as abnormalities of immune functions, are strongly suggested for etiology, while microvascular abnormalities, immune system activation, and oxidative stress are suggested for the pathogenesis. Recently, it has been found that a multitude of mediators and cytokines are implicated in the fibrotic processes observed in SSc. Among these, a central role could be exerted by “alarmins”, endogenous and constitutively expressed proteins/peptides that function as an intercellular signal defense. This review describes, in a detailed manner, the role of alarmins in the pathogenesis of scleroderma.
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Affiliation(s)
- Antonello Giovannetti
- Department of Translational and Precision Medicine, Sapienza University of Rome, 00185 Rome, Italy;
- Correspondence: ; Tel.: +39-3476138512
| | - Elisabetta Straface
- Center for Gender-Specific Medicine, Biomarkers Unit, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Edoardo Rosato
- Department of Translational and Precision Medicine, Sapienza University of Rome, 00185 Rome, Italy;
| | - Marco Casciaro
- School and Operative Unit of Allergy and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy; (M.C.); (S.G.)
| | - Giovanni Pioggia
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), 98164 Messina, Italy;
| | - Sebastiano Gangemi
- School and Operative Unit of Allergy and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy; (M.C.); (S.G.)
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18
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Araujo GR, Aglas L, Vaz ER, Machado Y, Huber S, Himly M, Duschl A, Goulart LR, Ferreira F. TGFβ1 mimetic peptide modulates immune response to grass pollen allergens in mice. Allergy 2020; 75:882-891. [PMID: 31750952 PMCID: PMC7217028 DOI: 10.1111/all.14108] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 09/22/2019] [Accepted: 09/29/2019] [Indexed: 12/15/2022]
Abstract
Background Transforming growth factor β1 (TGFβ1) is a cytokine that exerts immunosuppressive functions, as reflected by its ability to induce regulatory T (Treg) cell differentiation and inhibit Th1 and Th2 responses. Hence, peptides that mimic the active core domain of TGFβ1 may be promising candidates for modulation of the allergic response. This study aimed to investigate a synthetic TGFβ1 mimetic peptide (TGFβ1‐mim) for its ability to modulate the immune response during allergic sensitization to grass pollen allergens. Methods The in vitro action of TGFβ1‐mim was evaluated in human lung epithelial cells, Jurkat cells, and rat basophilic leukemia cells. The in vivo action was evaluated in a murine model of Phl p 5 allergic sensitization. Additionally, the Th2 modulatory response was evaluated in IL‐4 reporter mice. Results In vitro, TGFβ1‐mim downregulated TNF‐α production, IL‐8 gene expression, and cytokine secretion, upregulated IL‐10 secretion, and inhibited Phl p 5‐induced basophil degranulation. During Phl p 5 sensitization in mice, TGFβ1‐mim downregulated IL‐2, IL‐4, IL‐5, IL‐13, and IFN‐γ, upregulated IL‐10, and induced Treg cell production. Furthermore, mice treated with TGFβ1‐mim had lower levels of IgE, IgG1, IgG2a and higher levels of IgA antibodies than control mice. In a reporter mouse, the mimetic inhibited Th2 polarization. Conclusion The TGFβ1‐mim efficiently modulated various important events that exacerbate the allergic microenvironment, including the production of main cytokines that promote Th1 and Th2 differentiation, and the induction of allergen‐specific regulatory T cells, highlighting its potential use in therapeutic approaches to modulate the immune response toward environmental allergens.
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Affiliation(s)
- Galber R. Araujo
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Lorenz Aglas
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Emília R. Vaz
- Laboratory of Nanobiotechnology Institute of Biotechnology Federal University of Uberlândia Uberlândia Brazil
| | - Yoan Machado
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Sara Huber
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Martin Himly
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Albert Duschl
- Department of Biosciences University of Salzburg Salzburg Austria
| | - Luiz R. Goulart
- Laboratory of Nanobiotechnology Institute of Biotechnology Federal University of Uberlândia Uberlândia Brazil
| | - Fatima Ferreira
- Department of Biosciences University of Salzburg Salzburg Austria
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19
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Ahmed MB, Islam SU, Lee YS. Decursin negatively regulates LPS-induced upregulation of the TLR4 and JNK signaling stimulated by the expression of PRP4 in vitro. Anim Cells Syst (Seoul) 2020; 24:44-52. [PMID: 32158615 PMCID: PMC7048231 DOI: 10.1080/19768354.2020.1726811] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/09/2020] [Accepted: 02/03/2020] [Indexed: 02/08/2023] Open
Abstract
The current investigation was carried out to analyze the correlation of bacterial lipopolysaccharide (LPS) and pre-mRNA processing factor 4B (PRP4) in inducing inflammatory response and cell actin cytoskeleton rearrangement in macrophages (Raw 264.7) and colorectal (HCT116) as well as skin cancer (B16-F10) cells. Cell lines were stimulated with LPS, and the expression of PRP4 as well as pro-inflammatory cytokines and proteins like IL-6, IL-1β, TLR4, and NF-κB were assayed. The results demonstrated that LPS markedly increased the expression of PRP4, IL-6, IL-1β, TLR4, and NF-κB in the cells. LPS and PRP4 concomitantly altered the morphology of cells from an aggregated, flattened shape to a round shape. Decursin, a pyranocoumarin from Angelica gigas, inhibited the LPS and PRP4-induced inflammatory response, and reversed the induction of morphological changes. Finally, we established a possible link of LPS with TLR4 and JNK signaling, through which it activated PRP4. Our study provides molecular insights for LPS and PRP4-related pathogenesis and a basis for developing new strategies against metastasis in colorectal cancer and skin melanoma. Our study emphasizes that decursin may be an effective treatment strategy for various cancers in which LPS and PRP4 perform a critical role in inducing inflammatory response and morphological changes leading to cell survival and protection against anti-cancer drugs.
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Affiliation(s)
- Muhammad Bilal Ahmed
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu, Korea
| | - Salman Ul Islam
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu, Korea
| | - Young Sup Lee
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu, Korea
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20
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Domscheit H, Hegeman MA, Carvalho N, Spieth PM. Molecular Dynamics of Lipopolysaccharide-Induced Lung Injury in Rodents. Front Physiol 2020; 11:36. [PMID: 32116752 PMCID: PMC7012903 DOI: 10.3389/fphys.2020.00036] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/16/2020] [Indexed: 12/29/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a common disease entity in critical care medicine and is still associated with a high mortality. Because of the heterogeneous character of ARDS, animal models are an insturment to study pathology in relatively standardized conditions. Rodent models can bridge the gap from in vitro investigations to large animal and clinical trials by facilitating large sample sizes under physiological conditions at comparatively low costs. One of the most commonly used rodent models of acute lung inflammation and ARDS is administration of lipopolysaccharide (LPS), either into the airways (direct, pulmonary insult) or systemically (indirect, extra-pulmonary insult). This narrative review discusses the dynamics of important pathophysiological pathways contributing to the physiological response to LPS-induced injury. Pathophysiological pathways of LPS-induced lung injury are not only influenced by the type of the primary insult (e.g., pulmonary or extra-pulmonary) and presence of additional stimuli (e.g., mechanical ventilation), but also by time. As such, findings in animal models of LPS-induced lung injury may depend on the time point at which samples are obtained and physiological data are captured. This review summarizes the current evidence and highlights uncertainties on the molecular dynamics of LPS-induced lung injury in rodent models, encouraging researchers to take accurate timing of LPS-induced injury into account when designing experimental trials.
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Affiliation(s)
- Hannes Domscheit
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
| | - Maria A Hegeman
- Laboratory of Experimental Intensive Care and Anesthesiology (L∙E∙I∙C∙A), Department of Intensive Care, Academic Medical Center, Amsterdam, Netherlands.,Department of Educational Consultancy and Professional Development, Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, Netherlands
| | - Niedja Carvalho
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
| | - Peter M Spieth
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
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Liu X, Jin X, Yu D, Liu G. Suppression of NLRP3 and NF-κB signaling pathways by α-Cyperone via activating SIRT1 contributes to attenuation of LPS-induced acute lung injury in mice. Int Immunopharmacol 2019; 76:105886. [DOI: 10.1016/j.intimp.2019.105886] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/20/2019] [Accepted: 09/05/2019] [Indexed: 10/26/2022]
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Targeting oxidative stress, proinflammatory cytokines, apoptosis and toll like receptor 4 by empagliflozin to ameliorate bleomycin-induced lung fibrosis. Respir Physiol Neurobiol 2019; 273:103316. [PMID: 31600583 DOI: 10.1016/j.resp.2019.103316] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/14/2019] [Accepted: 10/04/2019] [Indexed: 02/07/2023]
Abstract
Lung fibrosis is one of the serious complications of bleomycin use in cancer therapy. The aim of this study was to investigate the effect of pre-treatment versus post-treatment with empagliflozin on pulmonary fibrosis induced by bleomycin. One hundred male C57BL/6 mice were divided into 5 equal groups as follows: control group; bleomycin group; bleomycin + carboxymethyl cellulose group; bleomycin group pretreated with empagliflozin and a group treated with empagliflozin after 15 days from starting bleomycin injection. The survival rate, lung weight/body weight ratio, lung tissue hydroxyproline, malondialdehyde, glutathione reductase, superoxide dismutase, nuclear factor (Erythroid-derived 2)-like 2 (Nrf2), heme oxygenase-1 (HO-1) and toll-like receptor 4 (TLR4) were assessed. Also, bronchoalveolar lavage fluid (BALF) was analyzed for total and differential leucocytic count, lactate dehydrogenase, interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α) and transforming growth factor-beta 1 (TGF-β1). The pulmonary tissues were subjected to histopathological, immunohistochemical and electron microscopic study. Empagliflozin induced significant decrease in lung weight/body weight ratio, BALF lactate dehydrogenase, total leucocytic count, IL-6, TNF-α, TLR4 and TGF-β1 associated with significant decrease in lung tissue oxidative stress and hydroxyproline and significant increase in the survival rate and tissue Nrf2/HO-1 content compared to bleomycin group. This was accompanied with significant improvement of the histopathological, immunohistochemical and electron microscopic picture compared to bleomycin group. These effects were significant in mice pretreated with empagliflozin compared to the group that received empagliflozin 15 days after starting bleomycin injection. In conclusion, empagliflozin may be used prophylactically to prevent pulmonary fibrosis induced by bleomycin.
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Kaya S, Albayrak Kaya S, Polat E, Fidanol Erboğa Z, Duran Y, Polat FR, Okuyan HM, Karaboğa İ. Protective effects of hesperetin on lipopolysaccharide-induced acute lung injury in a rat model. TURK GOGUS KALP DAMAR CERRAHISI DERGISI 2019; 28:359-368. [PMID: 32551168 PMCID: PMC7298383 DOI: 10.5606/tgkdc.dergisi.2020.18816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 01/22/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND In this experimental study, we aimed to investigate the effects of hesperetin, a natural flavonoid, on a lipopolysaccharideinduced acute lung injury model in rats. METHODS Between March 2019 and May 2019, a total of 18 adult male Wistar albino rats, weighing approximately 250 to 300 g, were randomly divided into three groups as control, lipopolysaccharide, and lipopolysaccharide + hesperetin groups (n=6 in each group). The wet/dry weight ratio of lung tissue was determined. Histopathological changes were examined using light and scanning electron microscopy. Pulmonary nuclear factor-kappa beta, inducible nitric oxide synthase, and alpha-smooth muscle antigen activity were determined with indirect immunohistochemical methods. Pulmonary apoptosis was detected with the terminal deoxynucleotidyl transferase dUTP nick-end labeling method. Tumor necrosis factor-alpha, interleukin-1 beta, interleukin-6, and interleukin-10 concentrations were measured with enzyme-linked immunosorbent assay. RESULTS Treatment with hesperetin significantly improved the architecture of lung tissue and reduced the wet/dry weight ratio, nuclear factor-kappa beta, inducible nitric oxide synthase, and alphasmooth muscle antigen expression, pulmonary apoptosis, and levels of proinflammatory cytokines. CONCLUSION Our study results suggest that hesperetin has a potent protective effect against lipopolysaccharide-induced acute lung injury in rats via suppression of the proinflammatory cytokine cascade, nuclear factor-kappa beta, signaling pathway activation, and apoptosis.
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Affiliation(s)
- Serkan Kaya
- Department of Thoracic Surgery, Tekirdağ Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey
| | - Sinem Albayrak Kaya
- Department of Midwifery, Biruni University, Faculty of Health Sciences, Istanbul, Turkey
| | - Elif Polat
- Department of Histology and Embriology, Tekirdağ Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey
| | - Zeynep Fidanol Erboğa
- Department of Histology and Embriology, Tekirdağ Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey
| | - Yasin Duran
- Department of General Surgery, Tekirdağ Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey
| | - Fatin Rüştü Polat
- Department of General Surgery, Tekirdağ Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey
| | - Hamza Malik Okuyan
- Department of Medical Services and Techniquies, Mustafa Kemal University, Hatay Vocational School of Health Sciences, Hatay, Turkey
| | - İhsan Karaboğa
- Department of Emergency and Disaster Medicine, Tekirdağ Namık Kemal University, School of Health, Tekirdağ, Turkey
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24
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Lu Y, Xu D, Liu J, Gu L. Protective effect of sophocarpine on lipopolysaccharide-induced acute lung injury in mice. Int Immunopharmacol 2019; 70:180-186. [DOI: 10.1016/j.intimp.2019.02.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 02/12/2019] [Accepted: 02/12/2019] [Indexed: 01/01/2023]
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25
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Li L, Li Q, Wei L, Wang Z, Ma W, Liu F, Shen Y, Zhang S, Zhang X, Li H, Qian Y. Chemokine (C‐X‐C motif) ligand 14 contributes to lipopolysaccharide‐induced fibrogenesis in mouse L929 fibroblasts via modulating PPM1A. J Cell Biochem 2019; 120:13372-13381. [PMID: 30920024 DOI: 10.1002/jcb.28612] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 01/13/2019] [Accepted: 01/25/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Li Li
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Qiuhong Li
- Department of Respiratory Medicine Shanghai Pulmonary Hospital, School of Medicine, Tongji University Shanghai China
| | - Lei Wei
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Zhongfu Wang
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Wei Ma
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Fangying Liu
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Yanhua Shen
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Shanfang Zhang
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Xiulian Zhang
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
| | - Huiping Li
- Department of Respiratory Medicine Shanghai Pulmonary Hospital, School of Medicine, Tongji University Shanghai China
| | - Yechang Qian
- Department of Respiratory Disease Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine Shanghai China
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26
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Nova Z, Skovierova H, Calkovska A. Alveolar-Capillary Membrane-Related Pulmonary Cells as a Target in Endotoxin-Induced Acute Lung Injury. Int J Mol Sci 2019; 20:ijms20040831. [PMID: 30769918 PMCID: PMC6412348 DOI: 10.3390/ijms20040831] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 02/06/2023] Open
Abstract
The main function of the lungs is oxygen transport from the atmosphere into the blood circulation, while it is necessary to keep the pulmonary tissue relatively free of pathogens. This is a difficult task because the respiratory system is constantly exposed to harmful substances entering the lungs by inhalation or via the blood stream. Individual types of lung cells are equipped with the mechanisms that maintain pulmonary homeostasis. Because of the clinical significance of acute respiratory distress syndrome (ARDS) the article refers to the physiological role of alveolar epithelial cells type I and II, endothelial cells, alveolar macrophages, and fibroblasts. However, all these cells can be damaged by lipopolysaccharide (LPS) which can reach the airspaces as the major component of the outer membrane of Gram-negative bacteria, and lead to local and systemic inflammation and toxicity. We also highlight a negative effect of LPS on lung cells related to alveolar-capillary barrier and their response to LPS exposure. Additionally, we describe the molecular mechanism of LPS signal transduction pathway in lung cells.
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Affiliation(s)
- Zuzana Nova
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Henrieta Skovierova
- Biomedical Center Martin, Division of Molecular Medicine, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Andrea Calkovska
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
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27
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Laurent P, Sisirak V, Lazaro E, Richez C, Duffau P, Blanco P, Truchetet ME, Contin-Bordes C. Innate Immunity in Systemic Sclerosis Fibrosis: Recent Advances. Front Immunol 2018; 9:1702. [PMID: 30083163 PMCID: PMC6064727 DOI: 10.3389/fimmu.2018.01702] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/10/2018] [Indexed: 12/20/2022] Open
Abstract
Systemic sclerosis (SSc) is a heterogeneous autoimmune disease characterized by three interconnected hallmarks (i) vasculopathy, (ii) aberrant immune activation, and (iii) fibroblast dysfunction leading to extracellular matrix deposition and fibrosis. Blocking or reversing the fibrotic process associated with this devastating disease is still an unmet clinical need. Although various components of innate immunity, including macrophages and type I interferon, have long been implicated in SSc, the precise mechanisms that regulate the global innate immune contribution to SSc pathogenesis remain poorly understood. Recent studies have identified new innate immune players, such as pathogen-recognition receptors, platelet-derived danger-associated molecular patterns, innate lymphoid cells, and plasmacytoid dendritic cells in the pathophysiology of SSc, including vasculopathy and fibrosis. In this review, we describe the evidence demonstrating the importance of innate immune processes during SSc development with particular emphasis on their role in the initiation of pathology. We also discuss potential therapeutic options to modulate innate immune cells or signaling in SSc that are emerging from these recent advances.
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Affiliation(s)
- Paoline Laurent
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France
| | - Vanja Sisirak
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France
| | - Estibaliz Lazaro
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Internal Medicine Department, Bordeaux University Hospital, Bordeaux, France
| | - Christophe Richez
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Rheumatology Department, Bordeaux University Hospital, Bordeaux, France
| | - Pierre Duffau
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Internal Medicine Department, Bordeaux University Hospital, Bordeaux, France
| | - Patrick Blanco
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Immunology and Immunogenetic Department, Bordeaux University Hospital, Bordeaux, France
| | - Marie-Elise Truchetet
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Rheumatology Department, Bordeaux University Hospital, Bordeaux, France
| | - Cécile Contin-Bordes
- CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.,Immunology and Immunogenetic Department, Bordeaux University Hospital, Bordeaux, France
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28
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Bhattacharyya S, Wang W, Qin W, Cheng K, Coulup S, Chavez S, Jiang S, Raparia K, De Almeida LMV, Stehlik C, Tamaki Z, Yin H, Varga J. TLR4-dependent fibroblast activation drives persistent organ fibrosis in skin and lung. JCI Insight 2018; 3:98850. [PMID: 29997297 DOI: 10.1172/jci.insight.98850] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 05/23/2018] [Indexed: 01/01/2023] Open
Abstract
Persistent fibrosis in multiple organs is the hallmark of systemic sclerosis (SSc). Recent genetic and genomic studies implicate TLRs and their damage-associated molecular pattern (DAMP) endogenous ligands in fibrosis. To test the hypothesis that TLR4 and its coreceptor myeloid differentiation 2 (MD2) drive fibrosis persistence, we measured MD2/TLR4 signaling in tissues from patients with fibrotic SSc, and we examined the impact of MD2 targeting using a potentially novel small molecule. Levels of MD2 and TLR4, and a TLR4-responsive gene signature, were enhanced in SSc skin biopsies. We developed a small molecule that selectively blocks MD2, which is uniquely required for TLR4 signaling. Targeting MD2/TLR4 abrogated inducible and constitutive myofibroblast transformation and matrix remodeling in fibroblast monolayers, as well as in 3-D scleroderma skin equivalents and human skin explants. Moreover, the selective TLR4 inhibitor prevented organ fibrosis in several preclinical disease models and mouse strains, and it reversed preexisting fibrosis. Fibroblast-specific deletion of TLR4 in mice afforded substantial protection from skin and lung fibrosis. By comparing experimentally generated fibroblast TLR4 gene signatures with SSc skin biopsy gene expression datasets, we identified a subset of SSc patients displaying an activated TLR4 signature. Together, results from these human and mouse studies implicate MD2/TLR4-dependent fibroblast activation as a key driver of persistent organ fibrosis. The results suggest that SSc patients with high TLR4 activity might show optimal therapeutic response to selective inhibitors of MD2/TLR4 complex formation.
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Affiliation(s)
- Swati Bhattacharyya
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Wenxia Wang
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Wenyi Qin
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kui Cheng
- Department of Chemistry and Biochemistry and the BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA
| | - Sara Coulup
- Department of Chemistry and Biochemistry and the BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA
| | - Sherry Chavez
- Department of Chemistry and Biochemistry and the BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA
| | - Shuangshang Jiang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Kirtee Raparia
- Feinberg School of Medicine, Northwestern University, Evanston, Illinois, USA
| | | | - Christian Stehlik
- Feinberg School of Medicine, Northwestern University, Evanston, Illinois, USA
| | - Zenshiro Tamaki
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Hang Yin
- Department of Chemistry and Biochemistry and the BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA.,School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - John Varga
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois, USA
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29
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Chen X, Tang L, Feng J, Wang Y, Han Z, Meng J. Downregulation of Paralemmin-3 Ameliorates Lipopolysaccharide-Induced Acute Lung Injury in Rats by Regulating Inflammatory Response and Inhibiting Formation of TLR4/MyD88 and TLR4/TRIF Complexes. Inflammation 2018; 40:1983-1999. [PMID: 28801798 PMCID: PMC7102376 DOI: 10.1007/s10753-017-0639-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Previous studies have demonstrated paralemmin-3 (PALM3) participates in Toll-like receptor (TLR) signaling. This study investigated the effect of PALM3 knockdown on lipopolysaccharide (LPS)-induced acute lung injury (ALI) and its underlying mechanisms. We constructed a recombinant adenoviral vector containing short hairpin RNA for PALM3 to knockdown PALM3 expression. A transgene-free adenoviral vector was used as a negative control. The ALI rat model was established by LPS peritoneal injection at 48-h post-transfection. Results showed that downregulation of PALM3 improved the survival rate, attenuated lung pathological changes, alleviated pulmonary edema, lung vascular leakage and neutrophil infiltration, inhibited the production of proinflammatory cytokines and activation of nuclear factor κB and interferon β regulatory factor 3, and promoted the secretion of anti-inflammatory cytokine interleukin-10 and expression of suppressor of cytokine signaling-3 in the ALI rat model. However, PALM3 knockdown had no effect on TLR4, myeloid differentiation factor 88 (MyD88), and Toll-interleukin-1 receptor domain-containing adaptor inducing interferon β (TRIF) expression. Moreover, PALM3 knockdown reduced the interaction of TLR4 with MyD88 or TRIF induced by LPS in rat lungs. Therefore, the downregulation of PALM3 protected rats from LPS-induced ALI and its mechanisms were partially associated with the modulation of inflammatory responses and inhibition of TLR4/MyD88 and TLR4/TRIF complex formation.
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Affiliation(s)
- Xuxin Chen
- Department of Respiratory Medicine, Navy General Hospital of the PLA, No. 6 Fucheng Road, Beijing, 100037, China
| | - Lu Tang
- Department of Neurology, The First Hospital of Changsha, Changsha, 430100, People's Republic of China
| | - Jian Feng
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Yi Wang
- Department of Respiratory Medicine, The Sixth People's Hospital of Jinan City Affiliated to Jining Medical College, Jinan, 250200, People's Republic of China
| | - Zhihai Han
- Department of Respiratory Medicine, Navy General Hospital of the PLA, No. 6 Fucheng Road, Beijing, 100037, China.
| | - Jiguang Meng
- Department of Respiratory Medicine, Navy General Hospital of the PLA, No. 6 Fucheng Road, Beijing, 100037, China.
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30
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Desai O, Winkler J, Minasyan M, Herzog EL. The Role of Immune and Inflammatory Cells in Idiopathic Pulmonary Fibrosis. Front Med (Lausanne) 2018; 5:43. [PMID: 29616220 PMCID: PMC5869935 DOI: 10.3389/fmed.2018.00043] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 02/06/2018] [Indexed: 12/15/2022] Open
Abstract
The contribution of the immune system to idiopathic pulmonary fibrosis (IPF) remains poorly understood. While most sources agree that IPF does not result from a primary immunopathogenic mechanism, evidence gleaned from animal modeling and human studies suggests that innate and adaptive immune processes can orchestrate existing fibrotic responses. This review will synthesize the available data regarding the complex role of professional immune cells in IPF. The role of innate immune populations such as monocytes, macrophages, myeloid suppressor cells, and innate lymphoid cells will be discussed, as will the activation of these cells via pathogen-associated molecular patterns derived from invading or commensural microbes, and danger-associated molecular patterns derived from injured cells and tissues. The contribution of adaptive immune responses driven by T-helper cells and B cells will be reviewed as well. Each form of immune activation will be discussed in the context of its relationship to environmental and genetic factors, disease outcomes, and potential therapies. We conclude with discussion of unanswered questions and opportunities for future study in this area.
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Affiliation(s)
- Omkar Desai
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
| | - Julia Winkler
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
| | - Maksym Minasyan
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
| | - Erica L Herzog
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States
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31
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Haw TJ, Starkey MR, Pavlidis S, Fricker M, Arthurs AL, Nair PM, Liu G, Hanish I, Kim RY, Foster PS, Horvat JC, Adcock IM, Hansbro PM. Toll-like receptor 2 and 4 have opposing roles in the pathogenesis of cigarette smoke-induced chronic obstructive pulmonary disease. Am J Physiol Lung Cell Mol Physiol 2018; 314:L298-L317. [PMID: 29025711 PMCID: PMC5866502 DOI: 10.1152/ajplung.00154.2017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 09/08/2017] [Accepted: 10/03/2017] [Indexed: 12/18/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is the third leading cause of morbidity and death and imposes major socioeconomic burdens globally. It is a progressive and disabling condition that severely impairs breathing and lung function. There is a lack of effective treatments for COPD, which is a direct consequence of the poor understanding of the underlying mechanisms involved in driving the pathogenesis of the disease. Toll-like receptor (TLR)2 and TLR4 are implicated in chronic respiratory diseases, including COPD, asthma and pulmonary fibrosis. However, their roles in the pathogenesis of COPD are controversial and conflicting evidence exists. In the current study, we investigated the role of TLR2 and TLR4 using a model of cigarette smoke (CS)-induced experimental COPD that recapitulates the hallmark features of human disease. TLR2, TLR4, and associated coreceptor mRNA expression was increased in the airways in both experimental and human COPD. Compared with wild-type (WT) mice, CS-induced pulmonary inflammation was unaltered in TLR2-deficient ( Tlr2-/-) and TLR4-deficient ( Tlr4-/-) mice. CS-induced airway fibrosis, characterized by increased collagen deposition around small airways, was not altered in Tlr2-/- mice but was attenuated in Tlr4-/- mice compared with CS-exposed WT controls. However, Tlr2-/- mice had increased CS-induced emphysema-like alveolar enlargement, apoptosis, and impaired lung function, while these features were reduced in Tlr4-/- mice compared with CS-exposed WT controls. Taken together, these data highlight the complex roles of TLRs in the pathogenesis of COPD and suggest that activation of TLR2 and/or inhibition of TLR4 may be novel therapeutic strategies for the treatment of COPD.
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Affiliation(s)
- Tatt Jhong Haw
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Malcolm R Starkey
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
- Priority Research Centre for Grow Up Well, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Stelios Pavlidis
- The Airways Disease Section, National Heart and Lung Institute, Imperial College London , London , United Kingdom
| | - Michael Fricker
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Anya L Arthurs
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Prema M Nair
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Gang Liu
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Irwan Hanish
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor , Malaysia
| | - Richard Y Kim
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Paul S Foster
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Jay C Horvat
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
| | - Ian M Adcock
- The Airways Disease Section, National Heart and Lung Institute, Imperial College London , London , United Kingdom
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, School of Biomedical Sciences and Pharmacy, Hunter Medical Research Institute and University of Newcastle, Callaghan, New South Wales , Australia
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32
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Suzuki T, Tada Y, Gladson S, Nishimura R, Shimomura I, Karasawa S, Tatsumi K, West J. Vildagliptin ameliorates pulmonary fibrosis in lipopolysaccharide-induced lung injury by inhibiting endothelial-to-mesenchymal transition. Respir Res 2017; 18:177. [PMID: 29037205 PMCID: PMC5644255 DOI: 10.1186/s12931-017-0660-4] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 10/06/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pulmonary fibrosis is a late manifestation of acute respiratory distress syndrome (ARDS). Sepsis is a major cause of ARDS, and its pathogenesis includes endotoxin-induced vascular injury. Recently, endothelial-to-mesenchymal transition (EndMT) was shown to play an important role in pulmonary fibrosis. On the other hand, dipeptidyl peptidase (DPP)-4 was reported to improve vascular dysfunction in an experimental sepsis model, although whether DPP-4 affects EndMT and fibrosis initiation during lipopolysaccharide (LPS)-induced lung injury is unclear. The aim of this study was to investigate the anti-EndMT effects of the DPP-4 inhibitor vildagliptin in pulmonary fibrosis after systemic endotoxemic injury. METHODS A septic lung injury model was established by intraperitoneal injection of lipopolysaccharide (LPS) in eight-week-old male mice (5 mg/kg for five consecutive days). The mice were then treated with vehicle or vildagliptin (intraperitoneally, 10 mg/kg, once daily for 14 consecutive days from 1 day before the first administration of LPS.). Flow cytometry, immunohistochemical staining, and quantitative polymerase chain reaction (qPCR) analysis was used to assess cell dynamics and EndMT function in lung samples from the mice. RESULTS Lung tissue samples from treated mice revealed obvious inflammatory reactions and typical interstitial fibrosis 2 days and 28 days after LPS challenge. Quantitative flow cytometric analysis showed that the number of pulmonary vascular endothelial cells (PVECs) expressing alpha-smooth muscle actin (α-SMA) or S100 calcium-binding protein A4 (S100A4) increased 28 days after LPS challenge. Similar increases in expression were also confirmed by qPCR of mRNA from isolated PVECs. EndMT cells had higher proliferative activity and migration activity than mesenchymal cells. All of these changes were alleviated by intraperitoneal injection of vildagliptin. Interestingly, vildagliptin and linagliptin significantly attenuated EndMT in the absence of immune cells or GLP-1. CONCLUSIONS Inhibiting DPP-4 signaling by vildagliptin could ameliorate pulmonary fibrosis by downregulating EndMT in systemic LPS-induced lung injury.
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Affiliation(s)
- Toshio Suzuki
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA. .,Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan.
| | - Yuji Tada
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Santhi Gladson
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Rintaro Nishimura
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan.,Department of Advanced Medicine in Pulmonary Hypertension, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Iwao Shimomura
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Satoshi Karasawa
- Department of Emergency and Critical Care Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Koichiro Tatsumi
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - James West
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
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33
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Bhattacharyya S, Varga J. Endogenous ligands of TLR4 promote unresolving tissue fibrosis: Implications for systemic sclerosis and its targeted therapy. Immunol Lett 2017; 195:9-17. [PMID: 28964818 DOI: 10.1016/j.imlet.2017.09.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/27/2017] [Accepted: 09/27/2017] [Indexed: 02/07/2023]
Abstract
Fibrosis, the hallmark of scleroderma or systemic sclerosis (SSc), is a complex, dynamic and generally irreversible pathophysiological process that leads to tissue disruption, and lacks effective therapy. While early-stage fibrosis resembles normal wound healing, in SSc fibrosis fails to resolve. Innate immune signaling via toll-like receptors (TLRs) has recently emerged as a key driver of persistent fibrotic response in SSc. Recurrent injury in genetically predisposed individual causes generation of "damage-associated molecular patterns" (DAMPs) such as fibronectin-EDA and tenascin-C. Sensing of these danger signals by TLR4 on resident cells elicits potent stimulatory effects on fibrotic gene expression and myofibroblast differentiation, and appears to sensitize fibroblasts to the profibrotic stimulatory effect of TGF-β. Thus, DAMPs induce TLR4-mediated innate immune signaling on resident mesenchymal cells which drives the emergence and persistence of fibrotic cells in tissues, and underlies the switch from a self-limited repair response to non-resolving pathological fibrosis characteristic of SSc. In this review, we present current views of the DAMP-TLR4 axis in driving sustained fibroblasts activation and its pathogenic roles in fibrosis progression in SSc, and potential anti-fibrotic approaches for selective therapeutic targeting of TLR4 signaling.
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Affiliation(s)
- Swati Bhattacharyya
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, IL, United States.
| | - John Varga
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, IL, United States
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Tao L, Yang J, Cao F, Xie H, Zhang M, Gong Y, Zhang C. Mogroside IIIE, a Novel Anti-Fibrotic Compound, Reduces Pulmonary Fibrosis through Toll-Like Receptor 4 Pathways. J Pharmacol Exp Ther 2017; 361:268-279. [DOI: 10.1124/jpet.116.239137] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/07/2017] [Indexed: 12/24/2022] Open
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Glaser K, Fehrholz M, Henrich B, Claus H, Papsdorf M, Speer CP. Anti-inflammatory effects of the new generation synthetic surfactant CHF5633 on Ureaplasma-induced cytokine responses in human monocytes. Expert Rev Anti Infect Ther 2016; 15:181-189. [PMID: 27828734 DOI: 10.1080/14787210.2017.1259067] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Synthetic surfactants represent a promising alternative to animal-derived preparations in the treatment of neonatal respiratory distress syndrome. The synthetic surfactant CHF5633 has proven biophysical effectiveness and, moreover, demonstrated anti-inflammatory effects in LPS-stimulated monocytes. With ureaplasmas being relevant pathogens in preterm lung inflammation, the present study addressed immunomodulatory features on Ureaplasma-induced monocyte cytokine responses. METHODS Ureaplasma parvum-stimulated monocytes were exposed to CHF5633. TNF-α, IL-1β, IL-8, IL-10, TLR2 and TLR4 expression were analyzed using qPCR and flow cytometry. RESULTS CHF5633 did not induce pro-inflammation, and did not aggravate Ureaplasma-induced pro-inflammatory cytokine responses. It suppressed U. parvum-induced intracellular TNF-α (p < 0.05) and IL-1β (p < 0.05) in neonatal monocytes and inhibited Ureaplasma-induced TNF-α mRNA (p < 0.05), TNF-α protein (p < 0.001), and IL-1β (p = 0.05) in adult monocytes. Ureaplasma-modulated IL-8, IL-10, TLR2 and TLR4 were unaffected. CONCLUSION CHF5633 does neither act pro-apoptotic nor pro-inflammatory in native and Ureaplasma-infected monocytes. Suppression of Ureaplasma-induced TNF-α and IL-1β underlines anti-inflammatory features of CHF5633.
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Affiliation(s)
- Kirsten Glaser
- a University Children´s Hospital , University of Wuerzburg , Wuerzburg , Germany
| | - Markus Fehrholz
- a University Children´s Hospital , University of Wuerzburg , Wuerzburg , Germany
| | - Birgit Henrich
- b Institute of Medical Microbiology and Hospital Hygiene , University Clinic of Heinrich-Heine University Duesseldorf , Duesseldorf , Germany
| | - Heike Claus
- c Institute for Hygiene and Microbiology , University of Wuerzburg , Wuerzburg , Germany
| | - Michael Papsdorf
- d Department of Obstetrics and Gynecology , University of Wuerzburg , Wuerzburg , Germany
| | - Christian P Speer
- a University Children´s Hospital , University of Wuerzburg , Wuerzburg , Germany
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The neutrophil elastase inhibitor, sivelestat, attenuates sepsis-related kidney injury in rats. Int J Mol Med 2016; 38:767-75. [PMID: 27430552 PMCID: PMC4990314 DOI: 10.3892/ijmm.2016.2665] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 06/24/2016] [Indexed: 12/18/2022] Open
Abstract
Sepsis-induced acute kidney injury (AKI) represents a major cause of mortality in intensive care units. Sivelestat, a selective inhibitor of neutrophil elastase (NE), can attenuate sepsis-related acute lung injury. However, whether sivelestat can preserve kidney function during sepsis remains unclear. In this study, we thus examined the effects of sivelestat on sepsis-related AKI. Cecal ligation and puncture (CLP) was performed to induce multiple bacterial infection in male Sprague-Dawley rats, and subsequently, 50 or 100 mg/kg sivelestat were administered by intraperitoneal injection immediately after the surgical procedure. In the untreated rats with sepsis, the mean arterial pressure (MAP) and glomerular filtration rate (GFR) were decreased, whereas serum blood urea nitrogen (BUN) and neutrophil gelatinase-associated lipocalin (NGAL) levels were increased. We found that sivelestat promoted the survival of the rats with sepsis, restored the impairment of MAP and GFR, and inhibited the increased BUN and NGAL levels; specifically, the higher dose was more effective. In addition, sivelestat suppressed the CLP-induced macrophage infiltration, the overproduction of pro-inflammatory mediators (tumor necrosis factor-α, interleukin-1β, high-mobility group box 1 and inducible nitric oxide synthase) and serine/threonine kinase (Akt) pathway activation in the rats. Collectively, our data suggest that the inhibition of NE activity with the inhibitor, sivelestat, is beneficial in ameliorating sepsis-related kidney injury.
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Karampitsakos T, Woolard T, Bouros D, Tzouvelekis A. Toll-like receptors in the pathogenesis of pulmonary fibrosis. Eur J Pharmacol 2016; 808:35-43. [PMID: 27364757 DOI: 10.1016/j.ejphar.2016.06.045] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/26/2016] [Accepted: 06/27/2016] [Indexed: 02/08/2023]
Abstract
Pulmonary fibrosis (PF) constitutes the end stage of a broad range of heterogeneous interstitial lung diseases, characterized by the destruction of the pulmonary parenchyma, deposition of extracellular matrix and dramatic changes in the phenotype of both fibroblasts and alveolar epithelial cells. More than 200 causes of pulmonary fibrosis have been identified so far, yet the most common form is idiopathic pulmonary fibrosis (IPF). IPF is a lethal lung disorder of unknown etiology with a gradually increasing worldwide incidence and a median survival of 3-5 years from the time of diagnosis. Despite intense research efforts, the pathogenesis remains elusive and no effective treatment is available. Accumulating body of evidence suggests an abnormal wound healing response followed by extracellular matrix deposition, destruction of lung architecture, ultimately leading to respiratory failure. The contribution of immune system in lung fibrogenesis had been largely underscored due to the absence of response to immunosuppressive agents; however, the premise that lung fibrosis has an immunologic background has been recently revived. Toll-like receptors (TLRs) are pattern recognition receptors (PRRs), which link innate and adaptive immune response and regulate wound healing. TLRs promote tissue repair or fibrosis in many disease settings including lung fibrosis, albeit with profound differences depending on the cellular microenvironment. This review summarizes the current state of knowledge regarding the mechanistic implications between TLRs and lung fibrosis and highlights the therapeutic potential of targeting TLR signaling at the ligand or receptor level.
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Affiliation(s)
- Theodoros Karampitsakos
- Academic Department of Pneumonology, Hospital for Diseases of the Chest, "Sotiria", Medical School, University of Athens, Messogion Avenue 152, Athens 11527, Greece
| | - Tony Woolard
- Department of Internal Medicine, Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, P.O. Box 208057 New Haven, CT, USA
| | - Demosthenes Bouros
- Academic Department of Pneumonology, Hospital for Diseases of the Chest, "Sotiria", Medical School, University of Athens, Messogion Avenue 152, Athens 11527, Greece
| | - Argyris Tzouvelekis
- Department of Internal Medicine, Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, P.O. Box 208057 New Haven, CT, USA.
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Suzuki T, Tada Y, Nishimura R, Kawasaki T, Sekine A, Urushibara T, Kato F, Kinoshita T, Ikari J, West J, Tatsumi K. Endothelial-to-mesenchymal transition in lipopolysaccharide-induced acute lung injury drives a progenitor cell-like phenotype. Am J Physiol Lung Cell Mol Physiol 2016; 310:L1185-98. [PMID: 27106288 DOI: 10.1152/ajplung.00074.2016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 04/17/2016] [Indexed: 12/15/2022] Open
Abstract
Pulmonary vascular endothelial function may be impaired by oxidative stress in endotoxemia-derived acute lung injury. Growing evidence suggests that endothelial-to-mesenchymal transition (EndMT) could play a pivotal role in various respiratory diseases; however, it remains unclear whether EndMT participates in the injury/repair process of septic acute lung injury. Here, we analyzed lipopolysaccharide (LPS)-treated mice whose total number of pulmonary vascular endothelial cells (PVECs) transiently decreased after production of reactive oxygen species (ROS), while the population of EndMT-PVECs significantly increased. NAD(P)H oxidase inhibition suppressed EndMT of PVECs. Most EndMT-PVECs derived from tissue-resident cells, not from bone marrow, as assessed by mice with chimeric bone marrow. Bromodeoxyuridine-incorporation assays revealed higher proliferation of capillary EndMT-PVECs. In addition, EndMT-PVECs strongly expressed c-kit and CD133. LPS loading to human lung microvascular endothelial cells (HMVEC-Ls) induced reversible EndMT, as evidenced by phenotypic recovery observed after removal of LPS. LPS-induced EndMT-HMVEC-Ls had increased vasculogenic ability, aldehyde dehydrogenase activity, and expression of drug resistance genes, which are also fundamental properties of progenitor cells. Taken together, our results demonstrate that LPS induces EndMT of tissue-resident PVECs during the early phase of acute lung injury, partly mediated by ROS, contributing to increased proliferation of PVECs.
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Affiliation(s)
- Toshio Suzuki
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Yuji Tada
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Rintaro Nishimura
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Takeshi Kawasaki
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Ayumi Sekine
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Takashi Urushibara
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Fumiaki Kato
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Taku Kinoshita
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - Jun Ikari
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
| | - James West
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Koichiro Tatsumi
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan; and
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Xi ZD, Xie CY, Xi YB. Macrophage migration inhibitory factor enhances lipopolysaccharide-induced fibroblast proliferation by inducing toll-like receptor 4. BMC Musculoskelet Disord 2016; 17:43. [PMID: 26813112 PMCID: PMC4728926 DOI: 10.1186/s12891-016-0895-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 01/19/2016] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Fibroblast proliferation is a common manifestation of chronic inflammatory diseases, including rheumatoid arthritis (RA), Crohn's disease and ulcerative colitis, etc. To alleviate patient suffering, the mechanism underlying fibroblast proliferation should be elucidated. METHODS CCK-8 assay was used to assess the stimulatory effect of LPS and macrophage migration inhibitory factor (MIF) on fibroblast proliferation. Then, TLR4 expression on fibroblast cell membrane was carried out by confocal scanning microscopy. Finally, real-time fluorescent quantitative PCR and flow cytometry were applied to determine the expression of TLR4 after MIF challenge. RESULTS LPS alone directly stimulated the fibroblast proliferation. In addition, MIF showed co-stimulatory effect on LPS-induced fibroblast proliferation. Interestingly, fibroblast overtly expressed TLR4 without stimulation. After MIF stimulation, real-time PCR showed TLR4 mRNA levels were increased by about 33% in the fibroblasts; in agreement, TLR4 expression on the fibroblast membrane was increased by about 20%, as shown by flow cytometry. CONCLUSIONS These findings indicated MIF elevates TLR4 expression in fibroblast, enhancing LPS-induced cell proliferation.
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Affiliation(s)
- Zheng-de Xi
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Room 905, Building 5, 280 South Shanghai Chongqing Road, Shanghai, 200025, China.
| | - Chang-Yi Xie
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Room 905, Building 5, 280 South Shanghai Chongqing Road, Shanghai, 200025, China
| | - Ye-Bin Xi
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Room 905, Building 5, 280 South Shanghai Chongqing Road, Shanghai, 200025, China
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Ometto F, Friso L, Astorri D, Botsios C, Raffeiner B, Punzi L, Doria A. Calprotectin in rheumatic diseases. Exp Biol Med (Maywood) 2016; 242:859-873. [PMID: 27895095 DOI: 10.1177/1535370216681551] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Calprotectin is a heterodimer formed by two proteins, S100A8 and S100A9, which are mainly produced by activated monocytes and neutrophils in the circulation and in inflamed tissues. The implication of calprotectin in the inflammatory process has already been demonstrated, but its role in the pathogenesis, diagnosis, and monitoring of rheumatic diseases has gained great attention in recent years. Calprotectin, being stable at room temperature, is a candidate biomarker for the follow-up of disease activity in many autoimmune disorders, where it can predict response to treatment or disease relapse. There is evidence that a number of immunomodulators, including TNF-α inhibitors, may reduce calprotectin expression. S100A8 and S100A9 have a potential role as a target of treatment in murine models of autoimmune disorders, since the direct or indirect blockade of these proteins results in amelioration of the disease process. In this review, we will go over the biologic functions of calprotectin which might be involved in the etiology of rheumatic disorders. We will also report evidence of its potential use as a disease biomarker. Impact statement Calprotectin is an acute-phase protein produced by monocytes and neutrophils in the circulation and inflamed tissues. Calprotectin seems to be more sensitive than CRP, being able to detect minimal residual inflammation and is a candidate biomarker in inflammatory diseases. High serum levels are associated with some severe manifestations of rheumatic diseases, such as glomerulonephritis and lung fibrosis. Calprotectin levels in other fluids, such as saliva and synovial fluid, might be helpful in the diagnosis of rheumatic diseases. Of interest is also the potential role of calprotectin as a target of treatment.
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Affiliation(s)
- Francesca Ometto
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Lara Friso
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Davide Astorri
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Costantino Botsios
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Bernd Raffeiner
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Leonardo Punzi
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
| | - Andrea Doria
- Medicine Department - DIMED, Rheumatology Unit, University of Padova, Padova 35128, Italy
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HDAC is essential for epigenetic regulation of Thy-1 gene expression during LPS/TLR4-mediated proliferation of lung fibroblasts. J Transl Med 2015; 95:1105-16. [PMID: 26214583 DOI: 10.1038/labinvest.2015.97] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 06/05/2015] [Accepted: 06/23/2015] [Indexed: 11/09/2022] Open
Abstract
Lipopolysaccharide (LPS)-induced proliferation of lung fibroblasts is closely correlated with loss of gene expression of thymocyte differentiation antigen-1 (Thy-1), accompanied with deacetylation of histones H3 and H4 at the Thy-1 gene promoter region; however, the mechanism remains enigmatic. We report here that LPS downregulates Thy-1 gene expression by activating histone deacetylases (HDACs) via Toll-like receptor 4 (TLR4) signaling. Treatment of primary cultured mouse lung fibroblasts with LPS resulted in significant upregulation of TLR4 and enhanced cell proliferation that was abolished by silencing TLR4 with lentivirus-delivered TLR4 shRNA. Interestingly, LPS increased the mRNA and protein levels of HDAC-4, -5, and -7, an effect that was abrogated by HDAC inhibitor trichostatin A (TSA) or TLR4-shRNA-lentivirus. Consistent with these findings, Ace-H3 and Ace-H4 were decreased by LPS that was prevented by TSA. Most importantly, chromosome immunoprecipitation (ChIP) analysis demonstrated that LPS decreased the association of Ace-H4 at the Thy-1 promoter region that was efficiently restored by pretreatment with TSA. Accordingly, LPS decreased the mRNA and protein levels of Thy-1 that was inhibited by TSA. Furthermore, silencing the Thy-1 gene by lentivirus-delivered Thy-1 shRNA could promote lung fibroblast proliferation, even in the absence of LPS. Conversely, overexpressing Thy-1 gene could inhibit lung fibroblast proliferation and reduce LPS-induced lung fibroblast proliferation. Our data suggest that LPS upregulates and activates HDACs through TLR4, resulting in deacetylation of histones H3 and H4 at the Thy-1 gene promoter that may contribute to Thy-1 gene silencing and lung fibroblast proliferation.
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Bhattacharyya S, Varga J. Emerging roles of innate immune signaling and toll-like receptors in fibrosis and systemic sclerosis. Curr Rheumatol Rep 2015; 17:474. [PMID: 25604573 DOI: 10.1007/s11926-014-0474-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Pathological fibrosis is a distinguishing hallmark of systemic sclerosis (SSc) as well as a number of more common conditions. Fibrosis is a complex and dynamic process associated with immune dysregulation, vasculopathy, and uncontrolled extracellular matrix production leading to intractable scar formation in the skin and internal organs. Persistent or recurrent chemical, infectious, mechanical, or autoimmune injury in genetically predisposed individuals causes sustained fibroblasts activation. Innate immune signaling via toll-like receptors (TLRs) is increasingly recognized as a key player driving the persistent fibrotic response in SSc. In particular, expression of TLR4 as well as its endogenous ligands are elevated in lesional tissue from patients with SSc. Ligand-induced TLR4 activation elicits potent stimulatory effects on fibrotic gene expression and myofibroblast differentiation. Furthermore, TLR4 appears to sensitize fibroblasts to the profibrotic stimulatory effect of transforming growth factor-β. This review highlights recent advances and emerging paradigms for understanding the regulation, complex functional roles, and therapeutic potential of TLRs in SSc pathogenesis.
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Affiliation(s)
- Swati Bhattacharyya
- Division of Rheumatology, Northwestern University Feinberg School of Medicine, 240 E. Huron St., Chicago, IL, 60611, USA,
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43
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Li W, Xu Q, Deng Y, Yang Z, Xing S, Zhao X, Zhu P, Wang X, He Z, Gao Y. High-mobility group box 1 accelerates lipopolysaccharide-induced lung fibroblast proliferation in vitro: involvement of the NF-κB signaling pathway. J Transl Med 2015; 95:635-47. [PMID: 25867768 DOI: 10.1038/labinvest.2015.44] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 02/23/2015] [Accepted: 02/24/2015] [Indexed: 01/18/2023] Open
Abstract
The mechanism underlying lipopolysaccharide (LPS)-induced aberrant proliferation of lung fibroblasts in Gram-negative bacilli-associated pulmonary fibrosis is unknown. High-mobility group box 1 (HMGB1) is a ubiquitous nuclear protein that is released from the nuclei of lung fibroblasts after LPS stimulation. It can exasperate LPS-induced inflammation and hasten cell proliferation. Thus, this study investigated the effects of LPS- and/or HMGB1-stimulating murine lung fibroblasts on gene expression using various assays in vitro. Thiazolyl-diphenyl-tetrazolium bromide (MTT) assay data showed that either LPS or HMGB1 could induce lung fibroblast proliferation. Endogenous HMGB1 secreted from lung fibroblasts was detected by enzyme-linked immunosorbent assay (ELISA) 48 h after LPS stimulation. Pretreatment with an anti-HMGB1 antibody inhibited the proliferative effects of LPS on lung fibroblasts. DNA microarray data showed that the NF-κB signaling genes were upregulated in cells after stimulated with LPS, HMGB1, or both. Secretion of matrix metalloproteinase (MMP)-2 and MMP-9, and tissue inhibitor of metalloproteinase 2 (TIMP-2) was significantly upregulated after treatment with LPS, HMGB1, or their combination. However, an NF-κB inhibitor was able to downregulate levels of these proteins. In addition, levels of Toll-like receptor 4 (TLR4), Toll-like receptor 2 (TLR2), and receptors for advanced glycation end products (RAGE) mRNA and proteins were also upregulated in these cells after LPS treatment and further upregulated by LPS plus HMGB1. In conclusion, the data from the current study demonstrate that LPS-induced lung fibroblast secretion of endogenous HMGB1 can augment the proproliferative effects of LPS and, therefore, may play a key role in exacerbation of pulmonary fibrosis. The underlying molecular mechanisms are related to the activation of the TLR4/NF-κB signaling pathway and its downstream targets.
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Affiliation(s)
- Wen Li
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiaoyi Xu
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuxiao Deng
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhongwei Yang
- Department of Anesthesiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shunpeng Xing
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xianyuan Zhao
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ping Zhu
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiangrui Wang
- Department of Anesthesiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhengyu He
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan Gao
- Department of Critical Care Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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LI SHANCHENG, XU XIAOYA, JIANG MAN, BI YULI, XU JIYING, HAN MINGYONG. Lipopolysaccharide induces inflammation and facilitates lung metastasis in a breast cancer model via the prostaglandin E2-EP2 pathway. Mol Med Rep 2015; 11:4454-62. [DOI: 10.3892/mmr.2015.3258] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 11/20/2014] [Indexed: 11/06/2022] Open
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45
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Chen WY, Huang YC, Yang ML, Lee CY, Chen CJ, Yeh CH, Pan PH, Horng CT, Kuo WH, Kuan YH. Protective effect of rutin on LPS-induced acute lung injury via down-regulation of MIP-2 expression and MMP-9 activation through inhibition of Akt phosphorylation. Int Immunopharmacol 2014; 22:409-13. [DOI: 10.1016/j.intimp.2014.07.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 07/16/2014] [Accepted: 07/21/2014] [Indexed: 12/13/2022]
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Lee CY, Yang JJ, Lee SS, Chen CJ, Huang YC, Huang KH, Kuan YH. Protective effect of Ginkgo biloba leaves extract, EGb761, on endotoxin-induced acute lung injury via a JNK- and Akt-dependent NFκB pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:6337-6344. [PMID: 24956234 DOI: 10.1021/jf501913b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Acute lung injury (ALI) is a clinical syndrome mainly caused by Gram-negative bacteria which is still in need of an effective therapeutic medicine. EGb761, an extract of Ginkgo biloba leaves, has several bioeffects including anti-inflammation, cardioprotection, neuroprotection, and free radical scavenging. Preadministration of EGb761 inhibited lipopolysaccharide (LPS)-induced histopathological changes and exchange of arterial blood gas. In addition, LPS-induced expression of proinflammatory mediators, such as tumor necrosis factor (TNF)-α, interleukin (IL)-6, macrophage inflammatory protein (MIP)-2, inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2), were suppressed by EGb761. The activation of nuclear factor (NF)κB, a transcription factor of proinflammatory mediators, and phosphorylation of IκB, an inhibitor of NFκB, were also reduced by EGb761. Furthermore, we found the inhibitory concentration of EGb761 on phosphorylation of JNK and Akt was less than those of ERK and p38 MAPK. In conclusion, EGb761 is a potential protective agent for ALI, possibly via downregulating the JNK- and Akt-dependent NFκB activation pathway.
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Affiliation(s)
- Chien-Ying Lee
- Department of Pharmacology, Chung Shan Medical University , No. 110, Sec. 1, Jianguo North Road, Taichung 40201, Taiwan
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Rhieu BH, Epperly MW, Cao S, Goff J, Shields D, Franicola D, Wang H, Greenberger JS. Improved longevity of hematopoiesis in long-term bone marrow cultures and reduced irradiation-induced pulmonary fibrosis in Toll-like receptor-4 deletion recombinant-negative mice. In Vivo 2014; 28:441-448. [PMID: 24982208 PMCID: PMC6436103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM We measured long-term hematopoiesis in continuous bone marrow cultures derived from Toll-like receptor-4 (Tlr4(-/-))(C57BL/6J) mice. MATERIALS AND METHODS We measured hematopoiesis in vitro over 27 weeks in long-term bone marrow cultures from Tlr4(-/-) and control mice, and irradiation-induced pulmonary fibrosis in mice irradiated to 20 Gy to the thorax. RESULTS There was a significant increase in the duration of hematopoiesis in long-term bone marrow cultures from Tlr4(-/-) mice in production of total non-adherent cells and day 7 and day 14 multi-lineage colony-forming cells. The histology of bone marrow hematopoietic and stromal cell lines was indistinguishable between different mouse strains. There was no detectable late irradiation pulmonary fibrosis in Tlr4(-/-) mice. CONCLUSION Homozygous deletion of both alleles of Tlr4, encoding for an inflammatory mediator receptor, improves the duration of hematopoiesis in vitro and reduces irradiation-induced lung fibrosis.
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Affiliation(s)
- Byung Han Rhieu
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Michael W Epperly
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Shaonan Cao
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Julie Goff
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Donna Shields
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Darcy Franicola
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Hong Wang
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Joel S Greenberger
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A.
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van Bon L, Cossu M, Loof A, Gohar F, Wittkowski H, Vonk M, Roth J, van den Berg W, van Heerde W, Broen JCA, Radstake TRDJ. Proteomic analysis of plasma identifies the Toll-like receptor agonists S100A8/A9 as a novel possible marker for systemic sclerosis phenotype. Ann Rheum Dis 2014; 73:1585-9. [PMID: 24718960 DOI: 10.1136/annrheumdis-2013-205013] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Systemic sclerosis (SSc) is an autoimmune disease characterised by fibrosis of the skin and the internal organs. Except for anticentromere, antitopoisomerase I and antipolymerase III antibodies, there are no reliable circulating markers predicting susceptibility and internal organ complications. This study has exploited a proteome-wide profiling method with the aim to identify new markers to identify SSc phenotype. METHOD 40 SSc patients were included for proteomic identification. Patients were stratified as having diffuse cutaneous SSc (dcSSc) (n=19) or limited cutaneous SSc (lcSSc) (n=21) according to the extent of skin involvement. As controls 19 healthy donors were included. Blood was drawn and plasma was stored before analysing with the SELDI-TOF-MS. For replication in serum, the cohort was extended with 60 SSc patients. RESULTS Proteomic analysis revealed a list of 25 masspeaks that were differentially expressed between SSc patients and healthy controls. One of the peaks was suggestive for S100A8, a masspeak we previously found in supernatant of plasmacytoid dendritic cells from SSc patients. Increased expression of S100A8/A9 in SSc patients was confirmed in replication cohort compared with controls. Intriguingly, S100A8/A9 was highest in patients with limited cutaneous SSc having lung fibrosis. CONCLUSIONS S100A8/A9 was robustly found to be elevated in the circulation of SSc patients, suggesting its use as a biomarker for SSc lung disease and the need to further explore the role of TLR in SSc.
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Affiliation(s)
- L van Bon
- Department of Rheumatology, Clinical Immunology and Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, The Netherlands Department of Rheumatology, Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Nijmegen Center for molecular life sciences (NCMLS), Nijmegen, The Netherlands
| | - M Cossu
- Department of Rheumatology, Clinical Immunology and Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, The Netherlands Department of Rheumatology, Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Nijmegen Center for molecular life sciences (NCMLS), Nijmegen, The Netherlands
| | - A Loof
- Central Laboratory for Haematology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - F Gohar
- Department of Pediatric Rheumatology and Immunology, University Children's Hospital Muenster, Muenster, Germany
| | - H Wittkowski
- Department of Pediatric Rheumatology and Immunology, University Children's Hospital Muenster, Muenster, Germany
| | - M Vonk
- Department of Rheumatology, Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Nijmegen Center for molecular life sciences (NCMLS), Nijmegen, The Netherlands
| | - J Roth
- Institute of Immunology, University of Muenster, Muenster, Germany
| | - W van den Berg
- Department of Rheumatology, Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Nijmegen Center for molecular life sciences (NCMLS), Nijmegen, The Netherlands
| | - W van Heerde
- Central Laboratory for Haematology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - J C A Broen
- Department of Rheumatology, Clinical Immunology and Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - T R D J Radstake
- Department of Rheumatology, Clinical Immunology and Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
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Kalash R, Berhane H, Au J, Rhieu BH, Epperly MW, Goff J, Dixon T, Wang H, Zhang X, Franicola D, Shinde A, Greenberger JS. Differences in irradiated lung gene transcription between fibrosis-prone C57BL/6NHsd and fibrosis-resistant C3H/HeNHsd mice. In Vivo 2014; 28:147-71. [PMID: 24632969 PMCID: PMC4074886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND/AIM We compared pulmonary irradiation-induced whole-lung, gene transcripts over 200 days after 20 Gy thoracic irradiation in female fibrosis-prone C57BL/6NHsd mice with fibrosis-resistant C3H/HeNHsd mice. MATERIALS AND METHODS Lung specimens were analyzed by real time polymerase chain reaction (rt-PCR) and changes over time in representative gene transcript levels were correlated with protein levels using western blot. RESULTS C3H/HeNHsd mice showed a significantly longer duration of elevation of gene transcripts for stress-response genes nuclear factor kappa-light-chain-enhancer of activated B cells (Nfkb), nuclear factor (erythroid-derived 2)-like 2 (Nrf2), transcription factor SP1 (SP1), activator protein 1 (AP1), radioprotection gene manganese superoxide dismutase (Sod2), and endothelial cell-associated genes von Willebrand factor (Vwf) and vascular endothelial growth factor (Vegf). C57BL/6NHsd mice showed acute elevation then down-regulation and a second elevation in gene transcripts for Nfkb, connective tissue growth factor (Ctgf), insulin-like growth factor-binding protein 7 (Igfbp7), tumor necrosis factor-alpha (Tnfa) Ctgf, Igfbp7, Tnfa, collagen 1a, and toll like receptor 4 (Tlr4). There were reciprocal patterns of elevation and decrease in levels of transcripts for epigenetic reader proteins bromodomain coding protein 1 (Brd1)Brd2,-3, and -4 between mouse strains. CONCLUSION Regulatory pathways linked to radiation pulmonary fibrosis may identify new targets for mitigators of radiation-induced fibrosis.
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Affiliation(s)
- Ronny Kalash
- Professor and Chairman, Department of Radiation Oncology, University of Pittsburgh Cancer Institute, UPMC Cancer Pavilion, 5150 Centre Avenue, Rm. 533, Pittsburgh, P A 15232, U.S.A.
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50
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Go H, Koh J, Kim HS, Jeon YK, Chung DH. Expression of toll-like receptor 2 and 4 is increased in the respiratory epithelial cells of chronic idiopathic interstitial pneumonia patients. Respir Med 2014; 108:783-92. [PMID: 24613046 DOI: 10.1016/j.rmed.2013.12.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 10/22/2013] [Accepted: 12/16/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND Idiopathic interstitial pneumonia (IIP) is characterized by chronic interstitial inflammation and fibrosis. Although mounting evidence has suggested that toll-like receptor (TLR) 2 and TLR4 are involved in the pathogenesis of non-infectious lung injury in vitro and in mouse models, their roles in human IIP remain unknown. METHODS To address this issue, we investigated the expression patterns of TLR2 and TLR4 by immunohistochemistry in resected lung tissues from patients with usual interstitial pneumonia (UIP) or nonspecific interstitial pneumonia (NSIP). RESULTS Type II pneumocytes, bronchial epithelial cells (BECs), and alveolar macrophages accounted for the majority of TLR2- and TLR4-expressing cells in both UIP and NSIP. The numbers of TLR2 and TLR4-positive respiratory epithelial (RE) cells, including type II pneumocytes and BECs, were significantly greater in UIP and NSIP than in the control. In particular, the numbers of TLR2-positive RE cells were much greater in UIP than in NSIP. The intensities of TLR2 and TLR4 expression in type II pneumocytes were also significantly stronger in UIP and NSIP than in the control. A comparison of the TLR expression patterns between the fibroblastic and fibrotic areas in UIP indicated that the numbers TLR2 and TLR4-positive RE cells were similar in fibroblastic areas, whereas the TLR2-positive RE cells outnumbered the TLR4-positive RE cells in the fibrotic areas. CONCLUSIONS This study demonstrates that RE cells over-express TLR2 and TLR4 in the lungs of IIP patients. These findings suggest that high expression of TLRs may contribute to the pathogenesis of human IIP.
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Affiliation(s)
- Heounjeong Go
- Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea; Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine,88 Olympic-ro, 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - Jaemoon Koh
- Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - Hye Sung Kim
- Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea; Department of Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - Yoon Kyung Jeon
- Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea.
| | - Doo Hyun Chung
- Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea; Ischemic/Hypoxia Institute, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea; Department of Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea.
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