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Parente R, Fumagalli MR, Di Claudio A, Cárdenas Rincón CL, Erreni M, Zanini D, Iapichino G, Protti A, Garlanda C, Rusconi R, Doni A. A Multilayered Imaging and Microfluidics Approach for Evaluating the Effect of Fibrinolysis in Staphylococcus aureus Biofilm Formation. Pathogens 2023; 12:1141. [PMID: 37764949 PMCID: PMC10534389 DOI: 10.3390/pathogens12091141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/30/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
The recognition of microbe and extracellular matrix (ECM) is a recurring theme in the humoral innate immune system. Fluid-phase molecules of innate immunity share regulatory roles in ECM. On the other hand, ECM elements have immunological functions. Innate immunity is evolutionary and functionally connected to hemostasis. Staphylococcus aureus (S. aureus) is a major cause of hospital-associated bloodstream infections and the most common cause of several life-threatening conditions such as endocarditis and sepsis through its ability to manipulate hemostasis. Biofilm-related infection and sepsis represent a medical need due to the lack of treatments and the high resistance to antibiotics. We designed a method combining imaging and microfluidics to dissect the role of elements of the ECM and hemostasis in triggering S. aureus biofilm by highlighting an essential role of fibrinogen (FG) in adhesion and formation. Furthermore, we ascertained an important role of the fluid-phase activation of fibrinolysis in inhibiting biofilm of S. aureus and facilitating an antibody-mediated response aimed at pathogen killing. The results define FG as an essential element of hemostasis in the S. aureus biofilm formation and a role of fibrinolysis in its inhibition, while promoting an antibody-mediated response. Understanding host molecular mechanisms influencing biofilm formation and degradation is instrumental for the development of new combined therapeutic approaches to prevent the risk of S. aureus biofilm-associated diseases.
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Affiliation(s)
- Raffaella Parente
- Multiscale ImmunoImaging Unit (mIIu), IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Maria Rita Fumagalli
- Multiscale ImmunoImaging Unit (mIIu), IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Alessia Di Claudio
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
| | - Cindy Lorena Cárdenas Rincón
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
| | - Marco Erreni
- Multiscale ImmunoImaging Unit (mIIu), IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
| | - Damiano Zanini
- Multiscale ImmunoImaging Unit (mIIu), IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Giacomo Iapichino
- Department of Anesthesia and Intensive Care Units, IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Alessandro Protti
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
- Department of Anesthesia and Intensive Care Units, IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Cecilia Garlanda
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Roberto Rusconi
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Andrea Doni
- Multiscale ImmunoImaging Unit (mIIu), IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
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2
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PPARβ/δ Ligands Regulate Oxidative Status and Inflammatory Response in Inflamed Corpus Luteum-An In Vitro Study. Int J Mol Sci 2023; 24:ijms24054993. [PMID: 36902426 PMCID: PMC10003567 DOI: 10.3390/ijms24054993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/19/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023] Open
Abstract
Inflammation in the female reproductive system causes serious health problems including infertility. The aim of this study was to determine the in vitro effects of peroxisome proliferator-activated receptor-beta/delta (PPARβ/δ) ligands on the transcriptomic profile of the lipopolysaccharide (LPS)-stimulated pig corpus luteum (CL) in the mid-luteal phase of the estrous cycle using RNA-seq technology. The CL slices were incubated in the presence of LPS or in combination with LPS and the PPARβ/δ agonist-GW0724 (1 μmol/L or 10 μmol/L) or the antagonist-GSK3787 (25 μmol/L). We identified 117 differentially expressed genes after treatment with LPS; 102 and 97 differentially expressed genes after treatment, respectively, with the PPARβ/δ agonist at a concentration of 1 μmol/L or 10 μmol/L, as well as 88 after the treatment with the PPARβ/δ antagonist. In addition, biochemical analyses of oxidative status were performed (total antioxidant capacity and activity of peroxidase, catalase, superoxide dismutase, and glutathione S-transferase). This study revealed that PPARβ/δ agonists regulate genes involved in the inflammatory response in a dose-dependent manner. The results indicate that the lower dose of GW0724 showed an anti-inflammatory character, while the higher dose seems to be pro-inflammatory. We propose that GW0724 should be considered for further research to alleviate chronic inflammation (at the lower dose) or to support the natural immune response against pathogens (at the higher dose) in the inflamed corpus luteum.
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Visalakshan RM, Bright R, Burzava ALS, Barker AJ, Simon J, Ninan N, Palms D, Wood J, Martínez-Negro M, Morsbach S, Mailänder V, Anderson PH, Brown T, Barker D, Landfester K, Vasilev K. Antibacterial Nanostructured Surfaces Modulate Protein Adsorption, Inflammatory Responses, and Fibrous Capsule Formation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:220-235. [PMID: 36416784 DOI: 10.1021/acsami.2c13415] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The present study interrogates the interaction of highly efficient antibacterial surfaces containing sharp nanostructures with blood proteins and the subsequent immunological consequences, processes that are of key importance for the fate of every implantable biomaterial. Studies with human serum and plasma pointed to significant differences in the composition of the protein corona that formed on control and nanostructured surfaces. Quantitative analysis using liquid chromatography-mass spectrometry demonstrated that the nanostructured surface attracted more vitronectin and less complement proteins compared to the untreated control. In turn, the protein corona composition modulated the adhesion and cytokine expression by immune cells. Monocytes produced lower amounts of pro-inflammatory cytokines and expressed more anti-inflammatory factors on the nanostructured surface. Studies using an in vivo subcutaneous mouse model showed reduced fibrous capsule thickness which could be a consequence of the attenuated inflammatory response. The results from this work suggest that antibacterial surface modification with sharp spike-like nanostructures may not only lead to the reduction of inflammation but also more favorable foreign body response and enhanced healing, processes that are beneficial for most medical devices implanted in patients.
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Affiliation(s)
- Rahul Madathiparambil Visalakshan
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, Oregon 97201, United States
| | - Richard Bright
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
| | - Anouck L S Burzava
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
| | - Alex J Barker
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Johanna Simon
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Neethu Ninan
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
| | - Dennis Palms
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
| | - Jonathan Wood
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
| | - María Martínez-Negro
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Svenja Morsbach
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Volker Mailänder
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Paul H Anderson
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Toby Brown
- Corin Group, Corin Australia, Sydney, New South Wales 2153, Australia
| | - Dan Barker
- Corin Group, Corin Australia, Sydney, New South Wales 2153, Australia
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Krasimir Vasilev
- UniSA STEM, University of South Australia, Adelaide, Mawson Lakes, South Australia 5095, Australia
- College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
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Biasella F, Plössl K, Baird PN, Weber BHF. The extracellular microenvironment in immune dysregulation and inflammation in retinal disorders. Front Immunol 2023; 14:1147037. [PMID: 36936905 PMCID: PMC10014728 DOI: 10.3389/fimmu.2023.1147037] [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: 01/18/2023] [Accepted: 02/15/2023] [Indexed: 03/05/2023] Open
Abstract
Inherited retinal dystrophies (IRDs) as well as genetically complex retinal phenotypes represent a heterogenous group of ocular diseases, both on account of their phenotypic and genotypic characteristics. Therefore, overlaps in clinical features often complicate or even impede their correct clinical diagnosis. Deciphering the molecular basis of retinal diseases has not only aided in their disease classification but also helped in our understanding of how different molecular pathologies may share common pathomechanisms. In particular, these relate to dysregulation of two key processes that contribute to cellular integrity, namely extracellular matrix (ECM) homeostasis and inflammation. Pathological changes in the ECM of Bruch's membrane have been described in both monogenic IRDs, such as Sorsby fundus dystrophy (SFD) and Doyne honeycomb retinal dystrophy (DHRD), as well as in the genetically complex age-related macular degeneration (AMD) or diabetic retinopathy (DR). Additionally, complement system dysfunction and distorted immune regulation may also represent a common connection between some IRDs and complex retinal degenerations. Through highlighting such overlaps in molecular pathology, this review aims to illuminate how inflammatory processes and ECM homeostasis are linked in the healthy retina and how their interplay may be disturbed in aging as well as in disease.
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Affiliation(s)
- Fabiola Biasella
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Karolina Plössl
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Paul N. Baird
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Department of Surgery, Ophthalmology, University of Melbourne, Melbourne, VIC, Australia
- *Correspondence: Paul N. Baird, ; Bernhard H. F. Weber,
| | - Bernhard H. F. Weber
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Institute of Clinical Human Genetics, University Hospital Regensburg, Regensburg, Germany
- *Correspondence: Paul N. Baird, ; Bernhard H. F. Weber,
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Yue Q, Zhang W, Lin S, Zheng T, Hou Y, Zhang Y, Li Z, Wang K, Yue L, Abay B, Li M, Fan L. Ejiao ameliorates lipopolysaccharide-induced pulmonary inflammation via inhibition of NFκB regulating NLRP3 inflammasome and mitochondrial ROS. Biomed Pharmacother 2022; 152:113275. [PMID: 35714510 DOI: 10.1016/j.biopha.2022.113275] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 11/19/2022] Open
Abstract
There is no effective treatment for acute lung injury (ALI) at present. Some studies have reported the anti-inflammatory effect of Ejiao, but no study has addressed the underlying action mechanism. In this study, the CCK8 assay displayed Ejiao had a protective effect against LPS-elicited inflammatory lung epithelial Beas 2B cells (LILEB 2B cells). Beas 2B cells treated with LPS and Ejiao were challenged with NFκB inhibitor Bay11-7082 and ROS scavenger N-acetyl cysteine (NAC) alone and in combination. The results of qRT-PCR, Western blotting and fluorescence labeling experiments using Bay11-7082 and NAC demonstrated Ejiao could significantly decrease the expression of p-p65 and p-IκBα in NFκB signaling pathway and its downstream NLRP3, ASC, Caspase-1 and IL-1β related to pyroptosis of LILEB 2B cells. Moreover, Ejiao reduced the production of mitochondrial ROS and reversed the change of mitochondrial membrane potential of LILEB 2B cells. Then, HE staining demonstrated Ejiao had a protective effect against the LPS-elicited ALI mouse model (LAMM). Ejiao also dramatically decreased the cell amount and the overall protein concentration of bronchoalveolar lavage fluid in LAMM. Immunohistochemical staining showed Ejiao remarkably reduced the expression of p-p65 and p-IκBα in NFκB signaling pathway and its downstream NLRP3, ASC, Caspase-1 and IL-1β. The ELISA of IL-1β revealed Ejiao could dose-dependably decrease the concentration of IL-1β in lung tissues, serum and BALF of LAMM. Finally, fluorescence labeling demonstrated Ejiao significantly reduced the mitochondrial ROS generation in the lung tissue of LAMM. This finding may afford a novel strategy for the precaution and therapy of ALI.
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Affiliation(s)
- Qingxi Yue
- Institute of Energy Metabolism and Health, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Wen Zhang
- Institute of Energy Metabolism and Health, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shumeng Lin
- Institute of Energy Metabolism and Health, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Tiansheng Zheng
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yaqin Hou
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yanfei Zhang
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ziye Li
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Kai Wang
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Liduo Yue
- Institute of Energy Metabolism and Health, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Baigenzhin Abay
- National Scientific Medical Research Center, Astana, Kazakhstan
| | - Ming Li
- Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Lihong Fan
- Institute of Energy Metabolism and Health, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Respiratory Medicine, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China.
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Tajbakhsh A, Gheibihayat SM, Taheri RA, Fasihi-Ramandi M, Bajestani AN, Taheri A. Potential diagnostic and prognostic of efferocytosis-related unwanted soluble receptors/ligands as new non-invasive biomarkers in disorders: a review. Mol Biol Rep 2022; 49:5133-5152. [PMID: 35419645 DOI: 10.1007/s11033-022-07224-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/02/2022] [Indexed: 11/25/2022]
Abstract
Efferocytosis is the process by which apoptotic cells are removed without inflammation to maintain tissue homeostasis, prevent unwanted inflammatory responses, and inhibit autoimmune responses. Coordination of efferocytosis occurs via many surfaces and chemotactic molecules and adaptors. Recently, soluble positive or negative mediators of efferocytosis, have been more noticeable as non-invasive valuable biomarkers in prognosis and targeted therapy. These soluble factors can be detected in different bodily fluids, such as serum, plasma, and urine as a non-invasive method. There are lots of studies that have tried to show the importance of receptors and ligands in disorders; while a few studies tried to indicate the importance of soluble forms of receptors/ligands and their clinical aspects as a systemic compound and shedding of targets related to efferocytosis. Some of these soluble forms also can be as sensitive as specific biomarkers for certain diseases compared with routine biomarkers, such as soluble circulatory Lectin-like oxidized low-density lipoprotein receptor-1 vs. troponin T in the acute coronary syndrome. Thus, this review tried to gain more understanding about efferocytosis-related unwanted soluble receptors/ligands, their roles, the clinical significance, and potential for diagnosis, and prognosis related to different diseases.
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Affiliation(s)
- Amir Tajbakhsh
- Molecular Biology Research Center, Systems Biology and Poisoning Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Gheibihayat
- Department of Medical Biotechnology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ramezan Ali Taheri
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mahdi Fasihi-Ramandi
- Molecular Biology Research Center, Systems Biology and Poisoning Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Abolfazl Nesaei Bajestani
- Department of Medical Genetics, Ayatollah Madani Hospital, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Abolfazl Taheri
- School of Medicine, New Hearing Technologies Research Center, Baghiyyatollah Al-Azam Hospital, Baqiyatallah University of Medical Sciences, Tehran, Iran.
- Department of ENT, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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7
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Zhou T, Li Z, Chen H. Melatonin alleviates lipopolysaccharide (LPS) / adenosine triphosphate (ATP)-induced pyroptosis in rat alveolar Type II cells (RLE-6TN) through nuclear factor erythroid 2-related factor 2 (Nrf2)-driven reactive oxygen species (ROS) downregulation. Bioengineered 2022; 13:1880-1892. [PMID: 35109747 PMCID: PMC8973817 DOI: 10.1080/21655979.2021.2018981] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Pyroptosis has pivotal parts within disease development, rendering this attractive mechanism for novel therapeutics. This investigation aimed at analyzing melatonin roles within pyroptosis together with related mechanistics. RLE-6TN cultures were exposed to varying LPS doses for 4.5 h followed by concomitant culturing in the presence of ATP (5 mM) for 0.5 h to induce injury, and the roles of melatonin, N-Acety-L-cysteine (NAC - a ROS scavenger), ML385 (specific Nrf2 inhibitor) were examined. Apoptosis analysis was performed through lactate dehydrogenase (LDH) activity assays, together with propidium iodide (PI) stain-assay. Intracellular ROS were quantified through 2, 7-dichlorodihydrofluorescein diacetate (DCFH-DA). Pyrolysis-associated proteins, such as nucleotide-binding oligomerization domain-like receptor containing pyrin domain 3 (NLRP3), apoptosis-associated speck-like protein containing a CARD (ASC), cysteine aspartate-specific protease-1 P20 (Caspase-1 P20), gasdermin D-N (GSDMD-N), and mature interleukin-1β (IL-1β), were identified through Western blotting. Dataset outcomes demonstrated LPS/ATP induce RLE-6TN cell pyroptosis, while melatonin alleviated this phenomenon, visualized through increased cell survival rate, reduction of LDH discharge and PI+ cellular count. Moreover, melatonin effectively reduced NLRP3 inflammasome triggering in RLE-6TN cells. Meanwhile, this study demonstrated melatonin thwarting over NLRP3 inflammasome triggering was depending on ROS. In addition, this study found that melatonin activated Nrf2/Heme Oxygenase-1 (HO-1) pathway, with pyroptotic-inhibiting function of melatonin was reverted through a bespoke Nrf2-inhibitor and siNrf2. In summary, this study concluded that melatonin prevents RLE-6TN cellular pyroptosis through Nrf2-triggered ROS downregulation.
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Affiliation(s)
- Tao Zhou
- Department of Pulmonary and Critical care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhaodong Li
- Basic Medicine College, Chongqing Medical University,1# Medical College Road, Yuzhong District, Chongqing, China
| | - Hong Chen
- Department of Pulmonary and Critical care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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8
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Chakravarty D, Ray AG, Chander V, Mabalirajan U, Mondal PC, Siddiqui KN, Sinha BP, Konar A, Bandyopadhyay A. Systemic deficiency of vitronectin is associated with aortic inflammation and plaque progression in ApoE-Knockout mice. FASEB Bioadv 2022; 4:121-137. [PMID: 35141476 PMCID: PMC8814562 DOI: 10.1096/fba.2021-00108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/22/2021] [Accepted: 10/22/2021] [Indexed: 12/30/2022] Open
Abstract
Optimal cell spreading and interplay of vascular smooth muscle cells (VSMC), inflammatory cells, and cell adhesion molecules (CAM) are critical for progressive atherosclerosis and cardiovascular complications. The role of vitronectin (VTN), a major cell attachment glycoprotein, in the pathogenesis of atherosclerosis remains elusive. In this study, we attempt to examine the pathological role of VTN in arterial plaque progression and inflammation. We found that, relative expression analysis of VTN from the liver of Apolipoprotein E (ApoE) Knockout mice revealed that atherosclerotic progression induced by feeding mice with high cholesterol diet (HCD) causes a significant downregulation of VTN mRNA as well as protein after 60 days. Promoter assay confirmed that cholesterol modulates the expression of VTN by influencing its promoter. Mimicking VTN reduction with siRNA in HCD fed ApoE Knockout mice, accelerated athero-inflammation with an increase in NF-kB, ICAM-1, and VCAM-1 at the site of the plaque along with upregulation of inflammatory proteins like MCP-1 and IL-1β in the plasma. Also, matrix metalloprotease (MMP)-9 and MMP-12 expression were increased and collagen content was decreased in the plaque, in VTN deficient condition. This might pose a challenge to plaque integrity. Human subjects with acute coronary syndrome or having risk factors of atherosclerosis have lower levels of VTN compared to healthy controls suggesting a clinical significance of plasma VTN in the pathophysiology of coronary artery disease. We establish that, VTN plays a pivotal role in cholesterol-driven atherosclerosis and aortic inflammation and might be a useful indicator for atherosclerotic plaque burden and stability.
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Affiliation(s)
- Devasmita Chakravarty
- Department of Cell Biology and PhysiologyCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | - Aleepta Guha Ray
- Department of Cell Biology and PhysiologyCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | - Vivek Chander
- Department of Cell Biology and PhysiologyCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | - Ulaganathan Mabalirajan
- Department of Cell Biology and PhysiologyCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | | | | | - Bishnu Prasad Sinha
- Department of Cancer Biology and Inflammatory DisorderCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | - Aditya Konar
- Department of Laboratory Animal FacilityCSIR‐Indian Institute of Chemical BiologyKolkataIndia
| | - Arun Bandyopadhyay
- Department of Cell Biology and PhysiologyCSIR‐Indian Institute of Chemical BiologyKolkataIndia
- Department of Cancer Biology and Inflammatory DisorderCSIR‐Indian Institute of Chemical BiologyKolkataIndia
- Department of Laboratory Animal FacilityCSIR‐Indian Institute of Chemical BiologyKolkataIndia
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9
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Zuchtriegel G, Uhl B, Pick R, Ramsauer M, Dominik J, Mittmann LA, Canis M, Kanse S, Sperandio M, Krombach F, Reichel CA. Vitronectin stabilizes intravascular adhesion of neutrophils by coordinating β2 integrin clustering. Haematologica 2021; 106:2641-2653. [PMID: 32703799 PMCID: PMC8485676 DOI: 10.3324/haematol.2019.226241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Indexed: 11/09/2022] Open
Abstract
The recruitment of neutrophils from the microvasculature to the site of injury or infection represents a key event in the inflammatory response. Vitronectin (VN) is a multifunctional macromolecule abundantly present in blood and extracellular matrix. The role of this glycoprotein in the extravasation process of circulating neutrophils remains elusive. Employing advanced in vivo/ex vivo imaging techniques in different mouse models as well as in vitro methods, we uncovered a previously unrecognized function of VN in the transition of dynamic to static intravascular interactions of neutrophils with microvascular endothelial cells. These distinct properties of VN require the heteromerization of this glycoprotein with plasminogen activator inhibitor-1 (PAI- 1) on the activated venular endothelium and subsequent interactions of this protein complex with the scavenger receptor low-density lipoprotein receptor-related protein-1 on intravascularly adhering neutrophils. This induces p38 mitogen-activated protein kinases-dependent intracellular signaling events which, in turn, regulates the proper clustering of the b2 integrin lymphocyte function associated antigen-1 on the surface of these immune cells. As a consequence of this molecular interplay, neutrophils become able to stabilize their adhesion to the microvascular endothelium and, subsequently, to extravasate to the perivascular tissue. Hence, endothelial-bound VN-PAI-1 heteromers stabilize intravascular adhesion of neutrophils by coordinating b2 integrin clustering on the surface of these immune cells, thereby effectively controlling neutrophil trafficking to inflamed tissue. Targeting this protein complex might be beneficial for the prevention and treatment of inflammatory pathologies.
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Affiliation(s)
- Gabriele Zuchtriegel
- Walter Brendel Centre of Experimental Medicine and Klinikum der Universität München, Germany
| | - Bernd Uhl
- Walter Brendel Centre of Experimental Medicine and Klinikum der Universität München, Germany
| | - Robert Pick
- Dept. of Otorhinolaryngology, Klinikum der Universität Munchen, Munich, Germany
| | - Michaela Ramsauer
- Walter Brendel Centre of Experimental Medicine and Klinikum der Universität Munchen, Germany
| | - Julian Dominik
- Dept. of Otorhinolaryngology, Klinikum der Universität Munchen, Munich, Germany
| | - Laura A Mittmann
- Walter Brendel Centre of Experimental Medicine and Klinikum der Universität Munchen, Germany
| | | | - Sandip Kanse
- Institute of Basic Medical Sciences, University of Oslo, Norway
| | - Markus Sperandio
- Dept. of Otorhinolaryngology, Klinikum der Universität Munchen, Munich, Germany
| | - Fritz Krombach
- Walter Brendel Centre of Experimental Medicine, Munich, Germany
| | - Christoph A Reichel
- Walter Brendel Centre of Experimental Medicine and Klinikum der Universität Munchen, Germany
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10
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Analyzing the Effect of Vitronectin on Cell Growth and Mesenchymal-Epithelial Transition of Pulmonary Fibroblast Cells. Lung 2021; 199:389-394. [PMID: 34415400 DOI: 10.1007/s00408-021-00467-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/07/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Vitronectin (VTN), a multifunctional glycoprotein, is involved in various biological and pathological processes. The purpose of this study was to explore the effect of VTN on mesenchymal-epithelial transition (MET) of pulmonary fibroblast cells. METHODS Lentivirus encoding for VTN-specific shRNA was constructed and infected into the cultured fibroblast WI-38 cells. Real-time PCR and Western blot were applied to examine the expression of VTN in WI-38 cells. MTT assay was used to assess cell proliferation. Western blot was conducted to examine the expression of MET-related and apoptosis-related proteins. RESULTS The knockdown of VTN significantly inhibited the growth of WI-38 cells compared to the control group. Meanwhile, knockdown of VTN remarkably increased the expression of Bax and Caspase 3 compared with the control group. Furthermore, knockdown of VTN significantly promoted the expression of E-cadherin in comparison to control group. CONCLUSIONS Knockdown of VTN promoted the expression of apoptosis-related factors, meanwhile, facilitated the MET process of fibroblast cells by regulating the expression of relevant factors. In sum, VTN performed a potential regulator in cell growth and MET of pulmonary fibroblast cells, which can be considered as a potential target for diagnose and therapy of relevant diseases.
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Modulation of α Vβ 6 integrin in osteoarthritis-related synovitis and the interaction with VTN (381-397 a.a.) competing for TGF-β1 activation. Exp Mol Med 2021; 53:210-222. [PMID: 33526813 PMCID: PMC8080589 DOI: 10.1038/s12276-021-00558-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/16/2020] [Accepted: 11/16/2020] [Indexed: 12/13/2022] Open
Abstract
Osteoarthritis is characterized by structural alteration of joints. Fibrosis of the synovial tissue is often detected and considered one of the main causes of joint stiffness and pain. In our earlier proteomic study, increased levels of vitronectin (VTN) fragment (amino acids 381–397) were observed in the serum of osteoarthritis patients. In this work, the affinity of this fragment for integrins and its putative role in TGF-β1 activation were investigated. A competition study determined the interaction of VTN(381–397 a.a.) with αVβ6 integrin. Subsequently, the presence of αVβ6 integrin was substantiated on primary human fibroblast-like synoviocytes (FLSs) by western blot and flow cytometry. By immunohistochemistry, β6 was detected in synovial membranes, and its expression showed a correlation with tissue fibrosis. Moreover, β6 expression was increased under TGF-β1 stimulation; hence, a TGF-β bioassay was applied. We observed that αVβ6 could mediate TGF-β1 bioavailability and that VTN(381–397 a.a.) could prevent TGF-β1 activation by interacting with αVβ6 in human FLSs and increased α-SMA. Finally, we analyzed serum samples from healthy controls and patients with osteoarthritis and other rheumatic diseases by nano-LC/Chip MS–MS, confirming the increased expression of VTN(381–397 a.a.) in osteoarthritis as well as in lupus erythematosus and systemic sclerosis. These findings corroborate our previous observations concerning the overexpression of VTN(381–397 a.a.) in osteoarthritis but also in other rheumatic diseases. This fragment interacts with αVβ6 integrin, a receptor whose expression is increased in FLSs from the osteoarthritic synovial membrane and that can mediate the activation of the TGF-β1 precursor in human FLSs. Insights into a mechanism underlying the formation of fibrotic tissue within joints in osteoarthritis may also prove relevant to other rheumatological disorders. The general mechanisms underlying fibrosis are reasonably well understood, but it remains unclear what triggers these processes in osteoarthitis. Researchers of the University of Liège in Belgium have uncovered a possible explanation based on experiments with cultured primary synovial fibroblasts from patients. Osteoarthitis is characterized by increased levels of a fragment of the protein vitronectin, and the researchers demonstrated that this in turn binds to a protein called αVβ6, potentially promoting initiation of fibrosis. They also observed elevated levels of the same vitronectin fragment in two other rheumatoid disorders, lupus and systemic sclerosis, and concluded that further research is needed to characterize this protein’s role in inflammation and fibrosis.
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12
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Ko HK, Lin AH, Perng DW, Lee TS, Kou YR. Lung Epithelial TRPA1 Mediates Lipopolysaccharide-Induced Lung Inflammation in Bronchial Epithelial Cells and Mice. Front Physiol 2020; 11:596314. [PMID: 33281629 PMCID: PMC7705107 DOI: 10.3389/fphys.2020.596314] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/30/2020] [Indexed: 12/22/2022] Open
Abstract
Toll-like receptor (TLR) 4 was originally thought to be the sole pattern recognition receptor for lipopolysaccharide (LPS). Transient receptor potential ankyrin 1 (TRPA1), a Ca2+-permeant channel, has been suggested as a non-TLR receptor membrane-bound sensor of LPS. We recently reported that TRPA1 is expressed in lung epithelial cells (LECs) and mediates lung inflammation induced by cigarette smoke. However, the role of TRPA1 in LPS-induced lung inflammation has not been conclusively defined, and its underlying cellular mechanisms remain unclear. In this study, our in vitro results showed that LPS sequentially produced a cascade of events, including the elevation of intracellular Ca2+, the activation of NADPH oxidase, increase in intracellular reactive oxygen species (ROS), the activation of mitogen-activated protein kinase (MAPK)/nuclear factor-kB (NF-κB) signaling, and the induction of IL-8. The increase in intracellular Ca2+ was inhibited by HC030031 (a TRPA1 antagonist) but was unaffected by TAK-242 (a TLR-4 inhibitor). The activation of NADPH oxidase was prevented by its inhibitor apocynin, EGTA (an extracellular Ca2+ chelator), and HC030031. The increase in intracellular ROS was attenuated by apocynin, N-acetyl-cysteine (NAC, a ROS scavenger), EGTA, and HC030031. The activation of the MAPK/NF-κB signaling was halted by NAC, EGTA, and HC030031. IL-8 induction was suppressed by HC030031 and TRPA1 siRNA, and further reduced by the combination of HC030031 and TAK-242. Our in vivo studies showed that trpa1–/– mice exhibited a reduced level of LPS-induced lung inflammation compared with wild-type mice as evidenced by the alleviations of increases in vascular permeability, inflammatory cell infiltration, inflammatory cytokine levels, oxidative stress, and MAPK signaling activation. Thus, in LECs, LPS may activate TRPA1 resulting in an increase in Ca2+ influx. The increased intracellular Ca2+ leads to NADPH oxidase activation, which causes an increase in intracellular ROS. The intracellular ROS activates the MAPK/NF-κB signaling resulting in IL-8 induction. This mechanism may possibly be at work to induce lung inflammation in mice.
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Affiliation(s)
- Hsin-Kuo Ko
- Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - An-Hsuan Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Physiology, University of Kentucky, Lexington, KY, United States
| | - Diahn-Warng Perng
- Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Tzong-Shyuan Lee
- Graduate Institute and Department of Physiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yu Ru Kou
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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13
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Schmid C, Ignjatovic V, Pang B, Nie S, Williamson NA, Tingay DG, Pereira-Fantini PM. Proteomics reveals region-specific hemostatic alterations in response to mechanical ventilation in a preterm lamb model of lung injury. Thromb Res 2020; 196:466-475. [PMID: 33075590 DOI: 10.1016/j.thromres.2020.09.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Preterm infants often require assisted ventilation, however ventilation when applied to the immature lung can initiate ventilator-induced lung injury (VILI). The biotrauma which underscores VILI is largely undefined, and is likely to involve vascular injury responses, including hemostasis. We aimed to use a ventilated, preterm lamb model to: (1) characterize regional alterations in hemostatic mediators within the lung and (2) assess the functional impact of protein alterations on hemostasis by analyzing temporal thrombin generation. MATERIALS AND METHODS Preterm lambs delivered at 124 to 127 days gestation received 90 min of mechanical ventilation (positive end-expiratory pressure = 8 cm H2O, VT = 6-8 ml/kg) and were compared with unventilated control lambs. At study completion, lung tissue was taken from standardized nondependent and gravity-dependent regions, and Orbitrap-mass spectrometry and KEGG were used to identify and map regional alterations in hemostasis pathway members. Temporal alterations in plasma thrombin generation were assessed. RESULTS Ventilation was distributed towards the nondependent lung. Significant changes in hemostatic protein abundance, were detected at a two-fold higher rate in the nondependent lung when compared with the gravity-dependent lung. Seven proteins were uniquely altered in non-dependent lung (SERPINA1, MYL12A, RAP1B, RHOA, ITGB1, A2M, GNAI2), compared with a single proteins in gravity-dependent lung (COL1A2). Four proteins were altered in both regions (VTN, FGG, FGA, and ACTB). Tissue protein alterations were mirrored by plasma hypocoagulability at 90-minutes of ventilation. CONCLUSIONS We observed regionally specific, hemostatic alterations within the preterm lung together with disturbed fibrinolysis following a short period of mechanical ventilation.
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Affiliation(s)
- Christine Schmid
- Neonatal Research, Murdoch Childrens Research Institute, Parkville, Australia; Department of Neonatology, Royal Children's Hospital, Parkville, Australia
| | - Vera Ignjatovic
- Department of Paediatrics, University of Melbourne, Parkville, Australia; Haematology Research, Murdoch Children's Research Institute, Parkville, Australia
| | - Boyuan Pang
- Neonatal Research, Murdoch Childrens Research Institute, Parkville, Australia; Department of Paediatrics, University of Melbourne, Parkville, Australia
| | - Shuai Nie
- Bio21 Institute, University of Melbourne, Parkville, Australia
| | | | - David G Tingay
- Neonatal Research, Murdoch Childrens Research Institute, Parkville, Australia; Department of Neonatology, Royal Children's Hospital, Parkville, Australia; Department of Paediatrics, University of Melbourne, Parkville, Australia
| | - Prue M Pereira-Fantini
- Neonatal Research, Murdoch Childrens Research Institute, Parkville, Australia; Department of Paediatrics, University of Melbourne, Parkville, Australia.
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14
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Lepedda AJ, Deiana GA, Lobina O, Nieddu G, Baldinu P, De Muro P, Andreetta F, Sechi E, Arru G, Corda DG, Sechi GP, Formato M. Plasma vitronectin is reduced in patients with myasthenia gravis: Diagnostic and pathophysiological potential. J Circ Biomark 2019; 8:1849454419875912. [PMID: 31588250 PMCID: PMC6740073 DOI: 10.1177/1849454419875912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 08/18/2019] [Indexed: 01/03/2023] Open
Abstract
Myasthenia gravis (MG) is an autoimmune disease leading to varying degrees of skeletal muscle weakness. It is caused by specific antibodies directed against definite components in the postsynaptic membrane at the neuromuscular junction (NMJ), such as the acetylcholine receptor (AChR) and the muscle-specific kinase (MUSK) receptor. In clinical practice, MG patients may be classified into three main subgroups based on the occurrence of serum autoantibodies directed against AChR or MUSK receptor or antibody-negative. As the MG subgroups differ in terms of clinical characteristics, disease pathogenesis, prognosis, and response to therapies, they could benefit from targeted treatment as well as the detection of other possible disease biomarkers. We performed proteomics on plasma fractions enriched in low-abundance proteins to identify potential biomarkers according to different autoimmune responses. By this approach, we evidenced a significant reduction of vitronectin in MG patients compared to healthy controls, irrespective of the autoantibodies NMJ target. The obtained results were validated by mono- and two-dimensional Western blotting analysis. Vitronectin is a multifunctional glycoprotein involved in the regulation of several pathophysiological processes, including complement-dependent immune response, coagulation, fibrinolysis, pericellular proteolysis, cell attachment, and spreading. The pathophysiological significance of the reduction of plasma vitronectin in MG patients has yet to be fully elucidated. It could be related either to a possible deposition of vitronectin at NMJ to counteract the complement-mediated muscle damage at this level or to a parallel variation of this glycoprotein in the muscle extracellular matrix with secondary induced alteration in clustering of AChRs at NMJ, as it occurs with variation in concentrations of agrin, another extracellular matrix component. The clinical value of measuring plasma vitronectin has yet to be defined. According to present findings, significantly lower plasma values of this glycoprotein might be indicative of an impaired complement-dependent immune response.
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Affiliation(s)
- Antonio Junior Lepedda
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Giovanni Andrea Deiana
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Omar Lobina
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Gabriele Nieddu
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Paola Baldinu
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Pierina De Muro
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Francesca Andreetta
- Diagnostic Laboratory of Neuroimmunolgy, U.O. Neurologia IV, I.R.C.C.S. Fondazione Istituto Neurologico "C. Besta", Milano, Italy
| | - Elia Sechi
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Giannina Arru
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Davide Giacomo Corda
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Gian Pietro Sechi
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Marilena Formato
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
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15
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Fetz AE, Fantaziu CA, Smith RA, Radic MZ, Bowlin GL. Surface Area to Volume Ratio of Electrospun Polydioxanone Templates Regulates the Adsorption of Soluble Proteins from Human Serum. Bioengineering (Basel) 2019; 6:E78. [PMID: 31480458 PMCID: PMC6784194 DOI: 10.3390/bioengineering6030078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/21/2019] [Accepted: 08/29/2019] [Indexed: 12/27/2022] Open
Abstract
Neutrophils, the first cells that interact with surface-adsorbed proteins on biomaterials, have been increasingly recognized as critical maestros in the foreign body response for guided tissue regeneration. Recent research has shown that small diameter (SD) fibers of electrospun tissue regeneration templates, which have a high surface area to volume ratio (SAVR), enhance the release of neutrophil extracellular traps (NETs) compared to large diameter (LD) fibers, resulting in impaired tissue regeneration. In this study, we evaluated the adsorption of eight human serum proteins on the surface of electrospun templates to investigate how protein adsorption may regulate the release of NETs. Electrospun polydioxanone templates made from SD fibers with high SAVR and LD fibers with low SAVR, were incubated with 0.2% human serum and in situ protein adsorption was quantified with infrared-based immunodetection. Of the detected proteins, IgM and vitronectin adsorbed at low levels, suggesting that they do not play a central role in the release of NETs. Contrastingly, albumin and IgG adsorbed rapidly to the surface of the templates. One-hundred to 200 times more IgG adsorbed on the templates compared to albumin, with significantly greater adsorption occurring on the SD templates with high SAVR. Given that neutrophils express receptors that interact with IgG during phagocytosis and NET release, these results suggest that SAVR-dependent adsorption of IgG on the SD electrospun templates may contribute to the up-regulated release of NETs. Overall, this study may aid in the design of immunomodulatory biomaterials that regulate NET release and thus the potential for neutrophil-driven tissue regeneration.
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Affiliation(s)
- Allison E Fetz
- Department of Biomedical Engineering, University of Memphis, Memphis, TN 38152, USA
| | - Cristina A Fantaziu
- Department of Biomedical Engineering, University of Memphis, Memphis, TN 38152, USA
| | - Richard A Smith
- Department of Biomedical Engineering, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Marko Z Radic
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Gary L Bowlin
- Department of Biomedical Engineering, University of Memphis, Memphis, TN 38152, USA.
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16
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Hessenauer MET, Lauber K, Zuchtriegel G, Uhl B, Hussain T, Canis M, Strieth S, Berghaus A, Reichel CA. Vitronectin promotes the vascularization of porous polyethylene biomaterials. Acta Biomater 2018; 82:24-33. [PMID: 30296618 DOI: 10.1016/j.actbio.2018.10.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 09/29/2018] [Accepted: 10/04/2018] [Indexed: 01/22/2023]
Abstract
Rapid implant vascularization is a prerequisite for successful biomaterial engraftment. Vitronectin (VN) is a matricellular glycoprotein well known for its capability to interact with growth factors, proteases, and protease inhibitors/receptors. Since such proteins are highly relevant for angiogenic processes, we hypothesized that VN contributes to the tissue integration of biomaterials. Employing different in vivo and ex vivo microscopy techniques, engraftment of porous polyethylene (PPE) implants was analyzed in the dorsal skinfold chamber model in wild-type (WT) and VN-/- mice. Upon PPE implantation, vascularization of this biomaterial was severely compromised in animals lacking this matricellular protein. Proteome profiling revealed that VN deficiency does not cause major changes in angiogenic protein composition in the implants suggesting that VN promotes PPE vascularization via mechanisms modulating the activity of angiogenic factors rather than by directly enriching them in the implant. Consequently, surface coating with recombinant VN (embedded in Matrigel®) accelerated implant vascularization in WT mice by enhancing the maturation of a vascular network. Thus, VN contributes to the engraftment of PPE implants by promoting the vascularization of this biomaterial. Surface coating with VN might provide a promising strategy to improve the vascularization of PPE implants without affecting the host's integrity. STATEMENT OF SIGNIFICANCE: Porous polyethylene (PPE) is a biomaterial frequently used in reconstructive surgery. The proper vascularization of PPE implants is a fundamental prerequisite for its successful engraftment in host tissue. Although the overall biocompatibility of PPE is good, there are less favorable application sites for its use in tissue reconstruction mostly characterized by low blood supply. Employing advanced in vivo microscopy methods and proteomic analyses in genetically engineered mice, we here describe a previously unrecognized function of vitronectin (VN) that enables this abundantly present glycoprotein to particularly promote the vascularization of PPE biomaterial. These properties of VN specifically facilitate the formation of a dense vessel network within the implant which relies on modulating the activity of angiogenic mediators rather than on the enrichment of these factors in the implant. Consequently, surface coating with this matricellular protein effectively accelerated and intensified implant vascularization which might be beneficial for its implementation at unfavorable sites for implantation without affecting the host's integrity.
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Affiliation(s)
- Maximilian E T Hessenauer
- Department of Plastic and Reconstructive Surgery, Friedrich-Alexander-Universität Erlangen, Erlangen, Germany; Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Kirsten Lauber
- Department of Radiotherapy and Radiation Oncology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Gabriele Zuchtriegel
- Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Bernd Uhl
- Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Timon Hussain
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Department of Otorhinolaryngology, University of Essen, Essen, Germany
| | - Martin Canis
- Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Sebastian Strieth
- Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of Mainz, Mainz, Germany
| | - Alexander Berghaus
- Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christoph A Reichel
- Department of Otorhinolaryngology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.
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17
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Lee EH, Shin JH, Kim SS, Lee H, Yang S, Seo SR. Laurus nobilis
leaf extract controls inflammation by suppressing NLRP3 inflammasome activation. J Cell Physiol 2018; 234:6854-6864. [DOI: 10.1002/jcp.27434] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 08/27/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Eun Hye Lee
- Department of Molecular Bioscience College of Biomedical Science, Institute of Bioscience and Biotechnology, Kangwon National University Chuncheon Republic of Korea
| | - Jin Hak Shin
- Department of Molecular Bioscience College of Biomedical Science, Institute of Bioscience and Biotechnology, Kangwon National University Chuncheon Republic of Korea
| | - Seon Sook Kim
- Department of Molecular Bioscience College of Biomedical Science, Institute of Bioscience and Biotechnology, Kangwon National University Chuncheon Republic of Korea
| | - Hanbyeol Lee
- Department of Thoracic and Cardiovascular Surgery School of Medicine, Kangwon National University Chuncheon Republic of Korea
| | - Se‐Ran Yang
- Department of Thoracic and Cardiovascular Surgery School of Medicine, Kangwon National University Chuncheon Republic of Korea
| | - Su Ryeon Seo
- Department of Molecular Bioscience College of Biomedical Science, Institute of Bioscience and Biotechnology, Kangwon National University Chuncheon Republic of Korea
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18
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Park JR, Lee H, Kim SI, Yang SR. The tri-peptide GHK-Cu complex ameliorates lipopolysaccharide-induced acute lung injury in mice. Oncotarget 2018; 7:58405-58417. [PMID: 27517151 PMCID: PMC5295439 DOI: 10.18632/oncotarget.11168] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/28/2016] [Indexed: 12/22/2022] Open
Abstract
The tripeptide-copper complex glycyl-l-histidyl-l-lysine-Cu (II) (GHK-Cu) is involved in wound healing and tissue remodeling. Although GHK-Cu exhibits anti-aging and tissue renewing properties, its roles in acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) are still unknown. Therefore, we examined the effects of GHK-Cu in lipopolysaccharide (LPS)-induced RAW 264.7 macrophages in vitro and ALI in mice in vivo. GHK-Cu treatment reduced reactive oxygen species (ROS) production, increased superoxide dismutase (SOD) activity while decreased TNF-α and IL-6 production through the suppression of NF-κB p65 and p38 MAPK signaling in vitro and in vivo model of ALI. Moreover, GHK-Cu attenuated LPS-induced lung histological alterations, suppressed the infiltration of inflammatory cells into the lung parenchyma in LPS-induced ALI in mice. Taken together, these findings demonstrate that GHK-Cu possesses a protective effect in LPS-induced ALI by inhibiting excessive inflammatory responses; accordingly it may represent a novel therapeutic approach for ALI/ARDS.
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Affiliation(s)
- Jeong-Ran Park
- Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kangwon National University, Chuncheon, Republic of Korea.,Institute of Medical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hanbyeol Lee
- Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kangwon National University, Chuncheon, Republic of Korea
| | - Seok-In Kim
- Bioceltran Co., Ltd., Chuncheon, Republic of Korea
| | - Se-Ran Yang
- Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kangwon National University, Chuncheon, Republic of Korea
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19
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Keasey MP, Jia C, Pimentel LF, Sante RR, Lovins C, Hagg T. Blood vitronectin is a major activator of LIF and IL-6 in the brain through integrin-FAK and uPAR signaling. J Cell Sci 2018; 131:jcs.202580. [PMID: 29222114 DOI: 10.1242/jcs.202580] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 12/06/2017] [Indexed: 12/18/2022] Open
Abstract
We defined how blood-derived vitronectin (VTN) rapidly and potently activates leukemia inhibitory factor (LIF) and pro-inflammatory interleukin 6 (IL-6) in vitro and after vascular injury in the brain. Treatment with VTN (but not fibrinogen, fibronectin, laminin-111 or collagen-I) substantially increased LIF and IL-6 within 4 h in C6-astroglioma cells, while VTN-/- mouse plasma was less effective than that from wild-type mice. LIF and IL-6 were induced by intracerebral injection of recombinant human (rh)VTN in mice, but induction seen upon intracerebral hemorrhage was less in VTN-/- mice than in wild-type littermates. In vitro, VTN effects were inhibited by RGD, αvβ3 and αvβ5 integrin-blocking peptides and antibodies. VTN activated focal adhesion kinase (FAK; also known as PTK2), whereas pharmacological- or siRNA-mediated inhibition of FAK, but not PYK2, reduced the expression of LIF and IL-6 in C6 and endothelial cells and after traumatic cell injury. Dominant-negative FAK (Y397F) reduced the amount of injury-induced LIF and IL-6. Pharmacological inhibition or knockdown of uPAR (also known as PLAUR), which binds VTN, also reduced cytokine expression, possibly through a common target of uPAR and integrins. We propose that VTN leakage into tissues promotes inflammation. Integrin-FAK signaling is therefore a novel IL-6 and LIF regulation mechanism relevant to the inflammation and stem cell fields.
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Affiliation(s)
- Matthew P Keasey
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Cuihong Jia
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Lylyan F Pimentel
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA.,Keizo Asami Laboratory (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brasil
| | - Richard R Sante
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Chiharu Lovins
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Theo Hagg
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
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20
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Jiang X, Xu L, Tang L, Liu F, Chen Z, Zhang J, Chen L, Pang C, Yu X. Role of the indoleamine-2,3-dioxygenase/kynurenine pathway of tryptophan metabolism in behavioral alterations in a hepatic encephalopathy rat model. J Neuroinflammation 2018; 15:3. [PMID: 29301550 PMCID: PMC5753541 DOI: 10.1186/s12974-017-1037-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 12/12/2017] [Indexed: 01/08/2023] Open
Abstract
Background This study aims to explore the role of indoleamine-2,3-dioxygenase (IDO)/kynurenine (KYN) pathway of tryptophan (TRY) metabolism in behavioral alterations observed in hepatic encephalopathy (HE) rats. Methods Expression levels of proinflammatory cytokines were tested by QT-PCR and ELISA, levels of IDOs were tested by QT-PCR and Western blot, and levels of 5-hydroxytryptamine (5-HT), KYN, TRY, 3-hydroxykynurenine (3-HK), and kynurenic acid (KA) in different brain regions were estimated using HPLC. Effects of the IDO direct inhibitor 1-methyl-l-tryptophan (1-MT) on cognitive, anxiety, and depressive-like behavior were evaluated in bile duct ligation (BDL) rats. Results Increased serum TNF-α, IL-1β, and IL-6 levels were shown in rats 7 days after BDL, and these increases were observed earlier than those in the brain, indicating peripheral immune activation may result in central upregulation of proinflammatory cytokines. Moreover, BDL rats showed a progressive decline in memory formation, as well as anxiety and depressive-like behavior. Further study revealed that IDO expression increased after BDL, accompanied by a decrease of 5-HT and an increase of KYN, as well as abnormal expression of 3-HK and KA. The above results affected by BDL surgery were reversed by IDO inhibitor 1-MT treatment. Conclusion Taken together, these findings indicate that (1) behavioral impairment in BDL rats is correlated with proinflammatory cytokines; (2) TRY pathway of KYN metabolism, activated by inflammation, may play an important role in HE development; and (3) 1-MT may serve as a therapeutic agent for HE. Electronic supplementary material The online version of this article (10.1186/s12974-017-1037-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xi Jiang
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China. .,Mingzhou Hospital, Zhejiang University, Hangzhou, Zhejiang Province, 315000, China.
| | - Lexing Xu
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Lin Tang
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Fuhe Liu
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Ziwei Chen
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Jiajia Zhang
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Lei Chen
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China
| | - Cong Pang
- Department of Neurosurgery, Huai'an First People's Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 223001, China.
| | - Xuefeng Yu
- Department of Pharmacy, Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, 315000, China.
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21
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Aulakh GK. Neutrophils in the lung: “the first responders”. Cell Tissue Res 2017; 371:577-588. [DOI: 10.1007/s00441-017-2748-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 11/21/2017] [Indexed: 12/27/2022]
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22
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Hashimoto K, Ikeda N, Nakashima M, Ikeshima-Kataoka H, Miyamoto Y. Vitronectin Regulates the Fibrinolytic System during the Repair of Cerebral Cortex in Stab-Wounded Mice. J Neurotrauma 2017; 34:3183-3191. [DOI: 10.1089/neu.2017.5008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Kei Hashimoto
- Graduate School of Humanities and Sciences, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Institute for Human Life Innovation, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Program for Leading Graduate Schools, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Research Fellow of Japan Society for the Promotion of Science, Kojimachi, Chiyoda-ku, Tokyo, Japan
| | - Natsumi Ikeda
- Graduate School of Humanities and Sciences, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
| | - Mari Nakashima
- Graduate School of Humanities and Sciences, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Institute for Human Life Innovation, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
| | - Hiroko Ikeshima-Kataoka
- Faculty of Science and Engineering, Waseda University, Okubo, Shinjuku-ku, Tokyo, Japan
- Department of Pharmacology and Neuroscience, Keio University School of Medicine, Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Yasunori Miyamoto
- Graduate School of Humanities and Sciences, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Institute for Human Life Innovation, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- Program for Leading Graduate Schools, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
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Vallabhajosyula P, Korutla L, Habertheuer A, Reddy S, Schaufler C, Lasky J, Diamond J, Cantu E. Ex Vivo Lung Perfusion Model to Study Pulmonary Tissue Extracellular Microvesicle Profiles. Ann Thorac Surg 2017; 103:1758-1766. [DOI: 10.1016/j.athoracsur.2016.11.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/14/2016] [Accepted: 11/17/2016] [Indexed: 12/22/2022]
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Li S, Hao G, Peng W, Geng X, Sun J. Expression and functional characterization of vitronectin gene from Japanese flounder (Paralichthys olivaceus). FISH & SHELLFISH IMMUNOLOGY 2017; 65:9-16. [PMID: 28377270 DOI: 10.1016/j.fsi.2017.03.055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 03/30/2017] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Vitronectin (Vtn) is a multifunctional protein that plays significant roles in cell adhesion, migration, spreading and survival, and in the regulation of membrane attack complex formation and the terminal pathway of complement activation in innate immune response. However, the expression and immune significance of Vtn in fish remains largely unknown. In order to understand the involvement of Vtn in fish innate immune response, here we cloned and characterized a full-length Vtn ortholog cDNA, termed PoVtn, from Japanese flounder Paralichthys olivaceus. The deduced PoVtn protein is comprised of 438 amino acids with a 19-amino-acid signal peptide sequence (1Met-19Ala) at the N-terminus. Protein domain analysis revealed that PoVtn possesses a conserved N-terminal somatomedin B domain followed by a conserved RGD motif and four haemopexin-like domains. Sequence analysis revealed that PoVtn has two potential glycosylation sites and shares 44-74% sequence identity with other teleost Vtn proteins. PoVtn mRNA was ubiquitously distributed in all examined normal tissues and showed the highest expression in Japanese flounder hepatopancreas tissue. PoVtn expression was induced by LPS and poly(I:C) challenges in the Japanese flounder head kidney macrophages (HKMs) and peripheral blood leucocytes (PBLs) and shows a pathogen-associated molecular pattern- and cell type-dependent manner. The expression of PoVtn was also modulated by bacterial challenge with Edwardsiella tarda in Japanese flounder immune-related tissues including head kidney, gill and spleen. Furthermore, overexpression of PoVtn in Japanese flounder FG-9307 cells significantly attenuated the LPS- and poly(I:C)-induced proinflammatory cytokines IL-1beta and TNF-alpha gene expression. Taken our findings together, we for the first time characterized Vtn gene expression in response to inflammatory stimuli in fish. Our results suggested a potential role of PoVtn in regulating fish innate immunity.
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Affiliation(s)
- Shuo Li
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, 393 West Binshui Road, Xiqing District, Tianjin 300387, China.
| | - Gaixiang Hao
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, 393 West Binshui Road, Xiqing District, Tianjin 300387, China
| | - Weijiao Peng
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, 393 West Binshui Road, Xiqing District, Tianjin 300387, China
| | - Xuyun Geng
- Tianjin Center for Control and Prevention of Aquatic Animal Infectious Disease, 442 South Jiefang Road, Hexi District, Tianjin 300221, China
| | - Jinsheng Sun
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, 393 West Binshui Road, Xiqing District, Tianjin 300387, China.
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Doni A, Garlanda C, Mantovani A. Innate immunity, hemostasis and matrix remodeling: PTX3 as a link. Semin Immunol 2016; 28:570-577. [PMID: 27881292 DOI: 10.1016/j.smim.2016.10.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/07/2016] [Accepted: 10/12/2016] [Indexed: 12/20/2022]
Abstract
Innate immunity is evolutionarily connected with hemostasis. PTX3 is an essential fluid-phase pattern recognition molecule of the innate immune system that acts as a functional ancestor of antibodies. PTX3 by interacting with defense collagens and fibrinogens amplifies effector functions of the innate immune system. At wound sites, PTX3 regulates the injury-induced thrombotic response and promotes wound healing by favoring timely fibrinolysis. Therefore, PTX3 interacts with ancestral domains conserved in innate immunity, hemostasis and extracellular matrix and exerts functions related to both antimicrobial resistance and tissue repair. These findings strengthen the connection between innate immune system and hemostasis, and suggest that recognition of microbes and extracellular matrix are evolutionarily conserved and integrated functions of the innate immune system.
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Affiliation(s)
- Andrea Doni
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy.
| | - Cecilia Garlanda
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy; Humanitas University, via Manzoni 113, 20089 Rozzano, Italy
| | - Alberto Mantovani
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy; Humanitas University, via Manzoni 113, 20089 Rozzano, Italy
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26
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Yu X, Jiang X, Zhang X, Chen Z, Xu L, Chen L, Wang G, Pan J. The effects of fisetin on lipopolysaccharide-induced depressive-like behavior in mice. Metab Brain Dis 2016; 31:1011-21. [PMID: 27209403 DOI: 10.1007/s11011-016-9839-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 05/16/2016] [Indexed: 02/08/2023]
Abstract
Major depressive disorder (MDD) involves a series of pathological changes including the inflammation and increased cytokine levels. Fisetin, a natural flavonoid, has anti-inflammatory and antioxidant, and also has been shown in our previous studies to exert anti-depressant-like properties. The present study aimed to investigate the effect of fisetin on lipopolysaccharide (LPS)-induced depressive-like behavior and inflammation in mice. The results suggested that the immobility time in the forced swimming test (FST) and tail suspension test (TST) were increased at 6 h, 12 h and 24 h after LPS injection (0.83 mg/kg). However, only the group of 24 h treatment did not show any effect on locomotion counts. Pretreatment with fisetin at doses of 20, 40 and 80 mg/kg (p.o.) for 7 days reversed LPS-induced alterations of the immobility time in both of these two tests. Further neurochemical assays suggested that pretreatment with fisetin reversed LPS-induced overexpression of pro-inflammatory cytokine (IL-1β, IL-6 and TNF-α) in the hippocampus and the prefrontal cortex (PFC). Moreover, higher dose of fisetin effectively antagonized iNOS mRNA expression and nitrite levels via the modulation of NF-κB in the hippocampus and PFC. Taken together, fisetin may be an effective therapeutic agent for LPS-induced depressive-like behaviors, which is due to its anti-inflammatory property.
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Affiliation(s)
- Xuefeng Yu
- Department of Pharmacy, Zhejiang Pharmaceutical College, Zhejiang Province, 315000, China.
| | - Xi Jiang
- Zhejiang University Mingzhou Hospital, Zhejiang Province, 315000, China
| | - Xiangming Zhang
- Department of Neurology, Ningbo Medical Treatment Center Lihuili Hospital, Ningbo, Zhejiang Province, 315000, China
| | - Ziwei Chen
- Department of Pharmacy, Zhejiang Pharmaceutical College, Zhejiang Province, 315000, China
| | - Lexing Xu
- Department of Pharmacy, Zhejiang Pharmaceutical College, Zhejiang Province, 315000, China
| | - Lei Chen
- Department of Pharmacy, Zhejiang Pharmaceutical College, Zhejiang Province, 315000, China
| | - Guokang Wang
- Department of Pharmacy, Zhejiang Pharmaceutical College, Zhejiang Province, 315000, China
| | - Jianchun Pan
- Brain Institute, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang Province, 325035, China.
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27
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Wheaton AK, Velikoff M, Agarwal M, Loo TT, Horowitz JC, Sisson TH, Kim KK. The vitronectin RGD motif regulates TGF-β-induced alveolar epithelial cell apoptosis. Am J Physiol Lung Cell Mol Physiol 2016; 310:L1206-17. [PMID: 27106291 PMCID: PMC4935469 DOI: 10.1152/ajplung.00424.2015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 04/14/2016] [Indexed: 01/11/2023] Open
Abstract
Transforming growth factor-β (TGF-β) is a critical driver of acute lung injury and fibrosis. Injury leads to activation of TGF-β, which regulates changes in the cellular and matrix makeup of the lung during the repair and fibrosis phase. TGF-β can also initiate alveolar epithelial cell (AEC) apoptosis. Injury leads to destruction of the laminin-rich basement membrane, which is replaced by a provisional matrix composed of arginine-glycine-aspartate (RGD) motif-containing plasma matrix proteins, including vitronectin and fibronectin. To determine the role of specific matrix proteins on TGF-β-induced apoptosis, we studied primary AECs cultured on different matrix conditions and utilized mice with deletion of vitronectin (Vtn(-/-)) or mice in which the vitronectin RGD motif is mutated to nonintegrin-binding arginine-glycine-glutamate (RGE) (Vtn(RGE/RGE)). We found that AECs cultured on fibronectin and vitronectin or in wild-type mouse serum are resistant to TGF-β-induced apoptosis. In contrast, AECs cultured on laminin or in serum from Vtn(-/-) or Vtn(RGE/RGE) mice undergo robust TGF-β-induced apoptosis. Plasminogen activator inhibitor-1 (PAI-1) sensitizes AECs to greater apoptosis by disrupting AEC engagement to vitronectin. Inhibition of integrin-associated signaling proteins augments AEC apoptosis. Mice with transgenic deletion of PAI-1 have less apoptosis after bleomycin, but deletion of vitronectin or disruption of the vitronectin RGD motif reverses this protection, suggesting that the proapoptotic function of PAI-1 is mediated through vitronectin inhibition. Collectively, these data suggest that integrin-matrix signaling is an important regulator of TGF-β-mediated AEC apoptosis and that PAI-1 functions as a natural regulator of this interaction.
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Affiliation(s)
- Amanda K Wheaton
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Miranda Velikoff
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Manisha Agarwal
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Tiffany T Loo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Jeffrey C Horowitz
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Thomas H Sisson
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Kevin K Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
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Nyström A, Thriene K, Mittapalli V, Kern JS, Kiritsi D, Dengjel J, Bruckner-Tuderman L. Losartan ameliorates dystrophic epidermolysis bullosa and uncovers new disease mechanisms. EMBO Mol Med 2016. [PMID: 26194911 PMCID: PMC4568953 DOI: 10.15252/emmm.201505061] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Genetic loss of collagen VII causes recessive dystrophic epidermolysis bullosa (RDEB)—a severe skin fragility disorder associated with lifelong blistering and disabling progressive soft tissue fibrosis. Causative therapies for this complex disorder face major hurdles, and clinical implementation remains elusive. Here, we report an alternative evidence-based approach to ameliorate fibrosis and relieve symptoms in RDEB. Based on the findings that TGF-β activity is elevated in injured RDEB skin, we targeted TGF-β activity with losartan in a preclinical setting. Long-term treatment of RDEB mice efficiently reduced TGF-β signaling in chronically injured forepaws and halted fibrosis and subsequent fusion of the digits. In addition, proteomics analysis of losartan- vs. vehicle-treated RDEB skin uncovered changes in multiple proteins related to tissue inflammation. In line with this, losartan reduced inflammation and diminished TNF-α and IL-6 expression in injured forepaws. Collectively, the data argue that RDEB fibrosis is a consequence of a cascade encompassing tissue damage, TGF-β-mediated inflammation, and matrix remodeling. Inhibition of TGF-β activity limits these unwanted outcomes and thereby substantially ameliorates long-term symptoms.
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Affiliation(s)
- Alexander Nyström
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Kerstin Thriene
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany ZBSA Center for Biological Systems Analysis, Freiburg, Germany FRIAS Freiburg Institute for Advanced Studies, Freiburg, Germany
| | - Venugopal Mittapalli
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Johannes S Kern
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Dimitra Kiritsi
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Jörn Dengjel
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany ZBSA Center for Biological Systems Analysis, Freiburg, Germany FRIAS Freiburg Institute for Advanced Studies, Freiburg, Germany BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Leena Bruckner-Tuderman
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany FRIAS Freiburg Institute for Advanced Studies, Freiburg, Germany
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CD97/ADGRE5 Inhibits LPS Induced NF-κB Activation through PPAR-γ Upregulation in Macrophages. Mediators Inflamm 2016; 2016:1605948. [PMID: 26997758 PMCID: PMC4779537 DOI: 10.1155/2016/1605948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/28/2015] [Accepted: 12/28/2015] [Indexed: 12/13/2022] Open
Abstract
CD97/ADGRE5 protein is predominantly expressed on leukocytes and belongs to the EGF-TM7 receptors family. It mediates granulocytes accumulation in the inflammatory tissues and is involved in firm adhesion of PMNC on activated endothelial cells. There have not been any studies exploring the role of CD97 in LPS induced NF-κB activation in macrophages. Therefore, we first measured the CD97 expression in LPS treated human primary macrophages and subsequently analyzed the levels of inflammatory factor TNF-α and transcription factor NF-κB in these macrophages that have been manipulated with either CD97 knockdown or overexpression. We found that a reported anti-inflammatory transcription factor, PPAR-γ, was involved in the CD97 mediated NF-κB suppression. Furthermore, by immunofluorescence staining, we established that CD97 overexpression not only inhibited LPS induced p65 expression in the nucleus but also promoted the PPAR-γ expression. Moreover, using CD97 knockout THP-1 cells, we further demonstrated that CD97 promoted PPAR-γ expression and decreased LPS induced NF-κB activation. In conclusion, CD97 plays a negative role in LPS induced NF-κB activation and TNF-α secretion, partly through PPAR-γ upregulation.
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30
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Liu L, He H, Liu A, Xu J, Han J, Chen Q, Hu S, Xu X, Huang Y, Guo F, Yang Y, Qiu H. Therapeutic Effects of Bone Marrow-Derived Mesenchymal Stem Cells in Models of Pulmonary and Extrapulmonary Acute Lung Injury. Cell Transplant 2015; 24:2629-42. [PMID: 25695285 DOI: 10.3727/096368915x687499] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cells (MSCs) offer a promising therapy for acute lung injury (ALI). However, whether the same MSC treatments possess similar potential for different ALI models is not fully clear. The present study evaluated the distribution and therapeutic effects of intravenous MSC administration for the treatment of intratracheal lipopolysaccharide (LPS)-induced intrapulmonary ALI and intravenous LPS/zymosan-induced extrapulmonary ALI, matched with lung injury severity, at 30 min and 1, 3, and 7 days. We found that MSC transplantation attenuated lung injury and inhibited lung inflammation in both ALI models. The benefits of MSCs were more significant in the intrapulmonary ALI mice. In vivo and ex vivo fluorescence imaging showed that MSCs primarily homed into the lung. However, more MSCs were recruited into the lungs of the intrapulmonary ALI mice than those of the extrapulmonary ALI mice over the time course. A few MSCs were also detected in the liver and spleen at days 3 and 7. In addition, the two ALI models showed different extrapulmonary organ dysfunction. A lower percentage of cell apoptosis and SDF-1α levels was found in the liver and spleen of the intrapulmonary ALI mice than in those of the extrapulmonary ALI mice. These results suggested that the two ALI models were accompanied with different degrees of extrapulmonary organ damage, which resulted in differences in the trafficking and accumulation of MSCs to the injured lung and consequently accounted for different therapeutic effects of MSCs for lung repair in the two ALI models. These data suggest that intravenous administration of MSCs has a greater potential for the treatment of intrapulmonary ALI than extrapulmonary ALI matched with lung injury severity; these differences were due to more recruitment of MSCs in the lungs of intrapulmonary ALI mice than those of extrapulmonary ALI mice. This finding may contribute to the clinical use of MSCs for the treatment of ALI.
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Affiliation(s)
- Ling Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, P. R. China
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Okawa S, Unuma K, Yamada A, Aki T, Uemura K. Lipopolysaccharide induces expression of collagen VI in the rat lung. J Toxicol Pathol 2014; 28:37-41. [PMID: 26023260 PMCID: PMC4337498 DOI: 10.1293/tox.2014-0053] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 12/02/2014] [Indexed: 12/02/2022] Open
Abstract
The involvement of the lung during the septic systemic inflammatory response elicited by administration of lipopolysaccharide (LPS) was investigated. Eight-week-old male Sprague–Dawley rats were injected i.p. with 15 mg/kg LPS. After 24 h, the lungs were excised to evaluate the cellular responses to LPS. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF) analysis revealed that type VI collagen (ColVI) was extremely upregulated during sepsis in the rat lung within the first 24 h of LPS administration. Upregulation of ColVI protein and its mRNA was demonstrated by Western blot analysis, real time PCR, and immunohistochemistry. To the best of our knowledge, this is the first report demonstrating the activation of ColVI in the rat lung at the early stage of systemic inflammation. Activation of ColVI might be involved in sepsis-mediated lung fibrosis at an early stage.
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Affiliation(s)
- Sayuri Okawa
- Department of Forensic Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Kana Unuma
- Department of Forensic Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Atsushi Yamada
- Department of Forensic Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Toshihiko Aki
- Department of Forensic Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Koichi Uemura
- Department of Forensic Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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iTRAQ-based proteomics reveals novel members involved in pathogen challenge in sea cucumber Apostichopus japonicus. PLoS One 2014; 9:e100492. [PMID: 24949634 PMCID: PMC4065040 DOI: 10.1371/journal.pone.0100492] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 05/22/2014] [Indexed: 01/08/2023] Open
Abstract
Skin ulceration syndrome (SUS) is considered to be a major constraint for the stable development of Apostichopus japonicus culture industries. In this study, we investigated protein changes in the coelomocytes of A. japonicus challenged by Vibrio splendidus using isobaric tags for relative and absolute quantification (iTRAQ) over a 96 h time course. Consequently, 228 differentially expressed proteins were identified in two iTRAQs. A comparison of the protein expression profiles among different time points detected 125 proteins primarily involved in response to endogenous stimuli at 24 h. At 48 h, the number of differentially expressed proteins decreased to 67, with their primary function being oxidation reduction. At the end of pathogen infection, proteins responsive to amino acid stimuli and some metabolic processes were classified as the predominant group. Fifteen proteins were differentially expressed at all time points, among which eight proteins related to pathologies in higher animals were shown to be down-regulated after V. splendidus infection: paxillin, fascin-2, aggrecan, ololfactomedin-1, nesprin-3, a disintegrin-like and metallopeptidase with thrombospondin type 1 motif (Adamts7), C-type lectin domain family 4 (Clec4g) and n-myc downstream regulated gene 1 (Ndrg1). To gain more insight into two SUS-related miRNA (miR-31 and miR-2008) targets at the protein level, all 129 down-regulated proteins were further analyzed in combination with RNA-seq. Twelve and eight proteins were identified as putative targets for miR-31 and miR-2008, respectively, in which six proteins (5 for miR-31 and 1 for miR-2008) displayed higher possibilities to be regulated at the level of translation. Overall, the present work enhances our understanding of the process of V. splendidus-challenged sea cucumber and provides a new method for screening miRNAs targets at the translation level.
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Anti-inflammatory effects of Reduning Injection on lipopolysaccharide-induced acute lung injury of rats. Chin J Integr Med 2014; 20:591-9. [PMID: 24916807 PMCID: PMC7101712 DOI: 10.1007/s11655-014-1758-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Indexed: 12/12/2022]
Abstract
Objective To evaluate the protective effects of Reduning Injection (热毒宁注射液, RDN), a patent Chinese medicine, on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats and its underlying mechanisms of action. Methods Sixty male Sprague-Dawley rats were randomly divided into 6 groups, including normal control, model, dexamethasone (DEX, 5 mg/kg), RDN-H (720 mg/kg), RDN-M (360 mg/kg) and RDN-L (180 mg/kg) groups, with 10 rats in each group. Rats were challenged with intravenous injection of LPS 1 h after intraperitoneal treatment with RDN or DEX. At 6 h after LPS challenge, lung tissues and bronchoalveolar lavage fluid (BALF) were collected, and the number of inflammatory cells was determined. The right lungs were collected for histopathologic examination, measurement of gene and protein expressions, superoxide dismutase (SOD) and myeloperoxidase (MPO) activities. Results In vivo pretreatment of RDN (360, 720 mg/kg) significantly reduced the weight of wet to dry (W/D) ratio of lung, protein content in BALF, and led to remarkable attenuation of LPS-induced histopathological changes in the lungs. Meanwhile, RDN enormously decreased BALF total inflammatory cells, especially neutrophil and macrophage cell numbers. Moreover, RDN increased SOD activity, inhibited MPO activity, alleviated LPS-induced tumor neurosis factor-α (TNF-α) and inducible nitric oxide synthase (iNOS) expression in lung tissues. Furthermore, RDN (720 mg/kg) efficiently weakened nuclear factorkappa B (NF-κB) gene and protein expression. Conclusion Anti-inflammatory effects of RDN was demonstrated to be preventing pulmonary neutrophil infiltration, lowering MPO activity, TNF-α and iNOS gene expression by inhibiting NF-κB activity in LPS-induced ALI.
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Jordan RPC, Williams DW, Moran GP, Coleman DC, Sullivan DJ. Comparative adherence of Candida albicans and Candida dubliniensis to human buccal epithelial cells and extracellular matrix proteins. Med Mycol 2014; 52:254-63. [PMID: 24625677 DOI: 10.1093/mmy/myt032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Candida albicans and Candida dubliniensis are very closely related pathogenic yeast species. Despite their close relationship, C. albicans is a far more successful colonizer and pathogen of humans. The purpose of this study was to determine if the disparity in the virulence of the two species is attributed to differences in their ability to adhere to human buccal epithelial cells (BECs) and/or extracellular matrix proteins. When grown overnight at 30°C in yeast extract peptone dextrose, genotype 1 C. dubliniensis isolates were found to be significantly more adherent to human BECs than C. albicans or C. dubliniensis genotypes 2-4 (P < 0.001). However, when the yeast cells were grown at 37°C, no significant difference between the adhesion of C. dubliniensis genotype 1 and C. albicans to human BECs was observed, and C. dubliniensis genotype 1 and C. albicans adhered to BECs in significantly greater numbers than the other C. dubliniensis genotypes (P < 0.001). Using surface plasmon resonance analysis, C. dubliniensis isolates were found to adhere in significantly greater numbers than C. albicans to type I and IV collagen, fibronectin, laminin, vitronectin, and proline-rich peptides. These data suggest that C. albicans is not more adherent to epithelial cells or matrix proteins than C. dubliniensis and therefore other factors must contribute to the greater levels of virulence exhibited by C. albicans.
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Affiliation(s)
- Rachael P C Jordan
- Microbiology Research Unit, Division of Oral Biosciences, Dublin Dental University Hospital, University of Dublin, Trinity College, Dublin 2, Ireland
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Riley SP, Patterson JL, Nava S, Martinez JJ. Pathogenic Rickettsia species acquire vitronectin from human serum to promote resistance to complement-mediated killing. Cell Microbiol 2013; 16:849-61. [PMID: 24286496 DOI: 10.1111/cmi.12243] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 10/30/2013] [Accepted: 11/15/2013] [Indexed: 01/01/2023]
Abstract
Bacteria of the genus Rickettsia are transmitted from arthropod vectors and primarily infect cells of the mammalian endothelial system. Throughout this infectious cycle, the bacteria are exposed to the deleterious effects of serum complement. Using Rickettsia conorii, the etiologic agent of Mediterranean spotted fever (MSF), as a model rickettsial species, we have previously demonstrated that this class of pathogen interacts with human factor H to mediate partial survival in human serum. Herein, we demonstrate that R. conorii also interacts with the terminal complement complex inhibitor vitronectin (Vn). We further demonstrate that an evolutionarily conserved rickettsial antigen, Adr1/RC1281, interacts with human vitronectin and is sufficient to mediate resistance to serum killing when expressed at the outer-membrane of serum sensitive Escherichia coli. Adr1 is an integral outer-membrane protein whose structure is predicted to contain eight membrane-embedded β-strands and four 'loop' regions that are exposed to extracellular milieu. Site-directed mutagenesis of Adr1 revealed that at least two predicted 'loop' regions are required to mediate resistance to complement-mediatedkilling and vitronectin acquisition. These results demonstrate that rickettsial species have evolved multiple mechanisms to evade complement deposition and that evasion of killing in serum is an evolutionarily conserved virulence attribute for this genus of obligate intracellular pathogens.
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Affiliation(s)
- Sean P Riley
- Department of Microbiology, University of Chicago, Chicago, IL, 60637, USA; Howard T. Ricketts Laboratory, Argonne, IL, 60439, USA; Vector-Borne Diseases Laboratories, Department of Pathobiological Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, LA, 70803, USA
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Bae HB, Tadie JM, Jiang S, Park DW, Bell CP, Thompson LC, Peterson CB, Thannickal VJ, Abraham E, Zmijewski JW. Vitronectin inhibits efferocytosis through interactions with apoptotic cells as well as with macrophages. THE JOURNAL OF IMMUNOLOGY 2013; 190:2273-81. [PMID: 23345331 DOI: 10.4049/jimmunol.1200625] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Effective removal of apoptotic cells, particularly apoptotic neutrophils, is essential for the successful resolution of acute inflammatory conditions. In these experiments, we found that whereas interaction between vitronectin and integrins diminished the ability of macrophages to ingest apoptotic cells, interaction between vitronectin with urokinase-type plasminogen activator receptor (uPAR) on the surface of apoptotic cells also had equally important inhibitory effects on efferocytosis. Preincubation of vitronectin with plasminogen activator inhibitor-1 eliminated its ability to inhibit phagocytosis of apoptotic cells. Similarly, incubation of apoptotic cells with soluble uPAR or Abs to uPAR significantly diminished efferocytosis. In the setting of LPS-induced ALI, enhanced efferocytosis and decreased numbers of neutrophils were found in bronchoalveolar lavage obtained from vitronectin-deficient (vtn(-/-)) mice compared with wild type (vtn(+/+)) mice. Furthermore, there was increased clearance of apoptotic vtn(-/-) as compared with vtn(+/+) neutrophils after introduction into the lungs of vtn(-/-) mice. Incubation of apoptotic vtn(-/-) neutrophils with purified vitronectin before intratracheal instillation decreased efferocytosis in vivo. These findings demonstrate that the inhibitory effects of vitronectin on efferocytosis involve interactions with both the engulfing phagocyte and the apoptotic target cell.
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Affiliation(s)
- Hong-Beom Bae
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294-0012, USA
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Li W, Xie JY, Li H, Zhang YY, Cao J, Cheng ZH, Chen DF. Viola yedoensis liposoluble fraction ameliorates lipopolysaccharide-induced acute lung injury in mice. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2012; 40:1007-18. [PMID: 22928831 DOI: 10.1142/s0192415x12500747] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Viola yedoensis is a component of traditional Chinese herb medicine for inflammatory diseases. Chemical constituents of V. yedoensis have been shown to possess antibacterial, anti-HIV, and anticoagulant effects in experimental research; however, their anti-inflammatory properties remain to be demonstrated. In this study, a mouse model of lipopolysaccharide (LPS)-induced acute lung injury was used to investigate the effect of petroleum ether fraction of V. yedoensis (PEVY) on inflammation in vivo. After being shown to have anti-complementary activity in vitro, PEVY was orally administered to the mice at doses of 2, 4, and 8 mg/kg. Treatment with PEVY significantly decreased the wet-to-dry weight ratio of the lung, total cells, red blood cells, protein concentration, and myeloperoxidase activity in bronchoalveolar lavage fluid. PEVY markedly attenuated lung injury with improved lung morphology and reduced complement deposition. In addition, PEVY suppressed the expression of pro-inflammatory cytokines, TNF-α, IL-1β, and IL-6. Taken together, PEVY protects the lung from acute injury, potentially via inhibiting the activation of the complement system and excessive production of proinflammatory mediators.
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Affiliation(s)
- Wen Li
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China
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Narasaki R, Xu Z, Liang Z, Fung LCW, Donahue D, Castellino FJ, Ploplis VA. The vitronectin-binding domain of plasminogen activator inhibitor-1 plays an important functional role in lipopolysaccharide-induced lethality in mice. J Thromb Haemost 2012; 10:2618-21. [PMID: 23082983 PMCID: PMC3674865 DOI: 10.1111/jth.12032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alberti MO, Roth JC, Ismail M, Tsuruta Y, Abraham E, Pereboeva L, Gerson SL, Curiel DT. Derivation of a myeloid cell-binding adenovirus for gene therapy of inflammation. PLoS One 2012; 7:e37812. [PMID: 22624065 PMCID: PMC3356302 DOI: 10.1371/journal.pone.0037812] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 04/24/2012] [Indexed: 11/21/2022] Open
Abstract
The gene therapy field is currently limited by the lack of vehicles that permit efficient gene delivery to specific cell or tissue subsets. Native viral vector tropisms offer a powerful platform for transgene delivery but remain nonspecific, requiring elevated viral doses to achieve efficacy. In order to improve upon these strategies, our group has focused on genetically engineering targeting domains into viral capsid proteins, particularly those based on adenovirus serotype 5 (Ad5). Our primary strategy is based on deletion of the fiber knob domain, to eliminate broad tissue specificity through the human coxsackie-and-adenovirus receptor (hCAR), with seamless incorporation of ligands to re-direct Ad tropism to cell types that express the cognate receptors. Previously, our group and others have demonstrated successful implementation of this strategy in order to specifically target Ad to a number of surface molecules expressed on immortalized cell lines. Here, we utilized phage biopanning to identify a myeloid cell-binding peptide (MBP), with the sequence WTLDRGY, and demonstrated that MBP can be successfully incorporated into a knob-deleted Ad5. The resulting virus, Ad.MBP, results in specific binding to primary myeloid cell types, as well as significantly higher transduction of these target populations ex vivo, compared to unmodified Ad5. These data are the first step in demonstrating Ad targeting to cell types associated with inflammatory disease.
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Affiliation(s)
- Michael O. Alberti
- Division of Human Gene Therapy, Departments of Medicine, Obstetrics and Gynecology, Pathology, Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Justin C. Roth
- Division of Human Gene Therapy, Departments of Medicine, Obstetrics and Gynecology, Pathology, Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail: (JCR); (DTC)
| | - Mourad Ismail
- Division of Hematology and Oncology, Department of Medicine, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, United States of America
- National Center for Regenerative Medicine, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Yuko Tsuruta
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Edward Abraham
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Larisa Pereboeva
- Division of Human Gene Therapy, Departments of Medicine, Obstetrics and Gynecology, Pathology, Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Stanton L. Gerson
- Division of Hematology and Oncology, Department of Medicine, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, United States of America
- National Center for Regenerative Medicine, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - David T. Curiel
- Division of Human Gene Therapy, Departments of Medicine, Obstetrics and Gynecology, Pathology, Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail: (JCR); (DTC)
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Li R, Ren M, Chen N, Luo M, Zhang Z, Wu J. Vitronectin increases vascular permeability by promoting VE-cadherin internalization at cell junctions. PLoS One 2012; 7:e37195. [PMID: 22606350 PMCID: PMC3350505 DOI: 10.1371/journal.pone.0037195] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 04/17/2012] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Cross-talk between integrins and cadherins regulates cell function. We tested the hypothesis that vitronectin (VN), a multi-functional adhesion molecule present in the extracellular matrix and plasma, regulates vascular permeability via effects on VE-cadherin, a critical regulator of endothelial cell (EC) adhesion. METHODOLOGY/PRINCIPAL FINDINGS Addition of multimeric VN (mult VN) significantly increased VE-cadherin internalization in human umbilical vein EC (HUVEC) monolayers. This effect was blocked by the anti-α(V)β(3) antibody, pharmacological inhibition and knockdown of Src kinase. In contrast to mult VN, monomeric VN did not trigger VE-cadherin internalization. In a modified Miles assay, VN deficiency impaired vascular endothelial growth factor-induced permeability. Furthermore, ischemia-induced enhancement of vascular permeability, expressed as the ratio of FITC-dextran leakage from the circulation into the ischemic and non-ischemic hindlimb muscle, was significantly greater in the WT mice than in the Vn(-/-) mice. Similarly, ischemia-mediated macrophage infiltration was significantly reduced in the Vn(-/-) mice vs. the WT controls. We evaluated changes in the multimerization of VN in ischemic tissue in a mouse hindlimb ischemia model. VN plays a previously unrecognized role in regulating endothelial permeability via conformational- and integrin-dependent effects on VE-cadherin trafficking. CONCLUSION/SIGNIFICANCE These results have important implications for the regulation of endothelial function and angiogenesis by VN under normal and pathological conditions.
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Affiliation(s)
- Rong Li
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
| | - Meiping Ren
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
| | - Ni Chen
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
| | - Mao Luo
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
| | - Zhuo Zhang
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
| | - Jianbo Wu
- Drug Discovery Research Center of Luzhou Medical College, Luzhou Medical College, Luzhou, Sichuan, People's Republic of China
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri, United States of America
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Bae HB, Zmijewski JW, Deshane JS, Zhi D, Thompson LC, Peterson CB, Chaplin DD, Abraham E. Vitronectin inhibits neutrophil apoptosis through activation of integrin-associated signaling pathways. Am J Respir Cell Mol Biol 2012; 46:790-6. [PMID: 22281987 DOI: 10.1165/rcmb.2011-0187oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Vitronectin is present in large concentrations in serum and the extracellular matrix. Although vitronectin is known to modulate neutrophil adhesion and chemotaxis, and to contribute to neutrophil-associated proinflammatory processes, a role in apoptosis has not been demonstrated. In the present studies, we found that neutrophils demonstrated more rapid progression to spontaneous or TNF-related apoptosis-inducing ligand-induced apoptosis when incubated under vitronectin-free conditions than when vitronectin was present. The ability of native vitronectin to delay neutrophil apoptosis was not recapitulated by the vitronectin somatomedin B domain. In contrast, inclusion of the cyclo[Arg-Gly-Asp-D-Phe-Val] peptide in cultures containing vitronectin resulted in enhanced neutrophil apoptosis, showing that the vitronectin RGD motif (Arg-Gly-Asp motif) was responsible for the antiapoptotic effects of vitronectin. Addition of antibodies to β(1), β(3), or β(5), but not to β(2) or β(4) integrins, reversed the ability of vitronectin to diminish neutrophil apoptosis. The ability of vitronectin to enhance neutrophil viability was dependent on activation of phosphatidylinositol 3-kinase and extracellular signal-regulated kinase 1/2 kinases, but not on the p38 kinase. Increased numbers of apoptotic neutrophils were present in the lungs of LPS-treated transgenic vitronectin-deficient mice, as compared with control mice. These results demonstrate a novel antiapoptotic function for vitronectin.
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Affiliation(s)
- Hong-Beom Bae
- Department of Medicine, University of Alabama at Birmingham Division of Pulmonary, Allergy & Critical Care Medicine, 901 19th Street South, Birmingham, AL 35294, USA
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Kim TW, Joh EH, Kim B, Kim DH. Ginsenoside Rg5 ameliorates lung inflammation in mice by inhibiting the binding of LPS to toll-like receptor-4 on macrophages. Int Immunopharmacol 2011; 12:110-6. [PMID: 22107725 DOI: 10.1016/j.intimp.2011.10.023] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Revised: 10/14/2011] [Accepted: 10/27/2011] [Indexed: 10/15/2022]
Abstract
Heating and steaming processes have been applied to various natural medicines for either enhancing or altering their pharmacological activities, and the chemical compositions of the active components. While ginsenoside Rb1, which is the major constituent of raw ginseng, has been studied extensively for its anti-inflammatory effect, the biological activity of ginsenoside Rg5, a major constituent of steamed ginseng, remains to be explored. Here, we isolated Rg5 and examined anti-inflammatory effect in lipopolysaccharide (LPS)-stimulated macrophages and on LPS-induced lung inflammation. Rg5 inhibited the expression of proinflammatory cytokines, IL-1β and TNF-α, as well as inflammatory enzymes, COX-2 and iNOS in LPS-stimulated alveolar macrophages. Rg5 also reduced LPS-induced phosphorylation of IL-1 receptor-associated kinases (IRAK)-1 and IKK-β, as well as the degradation of IRAK-1 and IRAK-4. Rg5 inhibited the phosphorylation of NF-κB as well as the translocation of p65 into the nucleus. When macrophages were treated with Alexa Fluor 594-conjugated LPS in the presence of Rg5, the fluorescence intensity of LPS observed outside the cell membrane was lower than that in LPS-stimulated alveolar macrophages alone. Rg5, inhibited the levels of protein and neutrophils in bronchoalveolar lavage fluid of LPS-stimulated mice, as well as pro-inflammatory cytokines, TNF-α and IL-1β. Rg5 also inhibited iNOS and COX expressions, and NF-κB activation in LPS-stimulated lung inflammation of mice. The inhibitory effect of Rg5 (10 mg/kg) was comparable to that of dexamethasone (5 mg/kg). Based on these findings, Rg5 can ameliorate lung inflammation possibly by inhibiting the binding of LPS to toll-like receptor (TLR)-4 on macrophages.
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Affiliation(s)
- Tae-Wan Kim
- College of Pharmacy, University of Sciences in Philadelphia, 600 South 43rd Street, Philadelphia, PA 19104-4495, USA
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Liu G, Yang Y, Yang S, Banerjee S, De Freitas A, Friggeri A, Davis KI, Abraham E. The receptor for urokinase regulates TLR2 mediated inflammatory responses in neutrophils. PLoS One 2011; 6:e25843. [PMID: 21998707 PMCID: PMC3187811 DOI: 10.1371/journal.pone.0025843] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 09/12/2011] [Indexed: 01/02/2023] Open
Abstract
The urokinase-type plasminogen activator receptor (uPAR), a glycosylphosphatidylinositol (GPI) anchored membrane protein, regulates urokinase (uPA) protease activity, chemotaxis, cell-cell interactions, and phagocytosis of apoptotic cells. uPAR expression is increased in cytokine or bacteria activated cell populations, including macrophages and monocytes. However, it is unclear if uPAR has direct involvement in the response of inflammatory cells, such as neutrophils and macrophages, to Toll like receptor (TLR) stimulation. In this study, we found that uPAR is required for optimal neutrophil activation after TLR2, but not TLR4 stimulation. We found that the expression of TNF-α and IL-6 induced by TLR2 engagement in uPAR-/- neutrophils was less than that in uPAR+/+ (WT) neutrophils. Pretreatment of neutrophils with PI-PLC, which cleaves GPI moieties, significantly decreased TLR2 induced expression of TNF-α in WT neutrophils, but demonstrated only marginal effects on TNF-α expression in PAM treated uPAR-/- neutrophils. IκB-α degradation and NF-κB activation were not different in uPAR-/- or WT neutrophils after TLR2 stimulation. However, uPAR is required for optimal p38 MAPK activation after TLR2 engagement. Consistent with the in vitro findings that uPAR modulates TLR2 engagement induced neutrophil activation, we found that pulmonary and systemic inflammation induced by TLR2, but not TLR4 stimulation is reduced in uPAR-/- mice compared to WT counterparts. Therefore, our data suggest that neutrophil associated uPAR could be a potential target for treating acute inflammation, sepsis, and organ injury related to severe bacterial and other microbial infections in which TLR2 engagement plays a major role.
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Affiliation(s)
- Gang Liu
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yanping Yang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Shanzhong Yang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Sami Banerjee
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Andressa De Freitas
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Arnaud Friggeri
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Pole Anesthésie Réanimation, CHU d'Amiens and INSERM, ERI-12, Amiens, France
| | - Kasey I. Davis
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Edward Abraham
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Bae HB, Zmijewski JW, Deshane JS, Tadie JM, Chaplin DD, Takashima S, Abraham E. AMP-activated protein kinase enhances the phagocytic ability of macrophages and neutrophils. FASEB J 2011; 25:4358-68. [PMID: 21885655 DOI: 10.1096/fj.11-190587] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Although AMPK plays well-established roles in the modulation of energy balance, recent studies have shown that AMPK activation has potent anti-inflammatory effects. In the present experiments, we examined the role of AMPK in phagocytosis. We found that ingestion of Escherichia coli or apoptotic cells by macrophages increased AMPK activity. AMPK activation increased the ability of neutrophils or macrophages to ingest bacteria (by 46 ± 7.8 or 85 ± 26%, respectively, compared to control, P<0.05) and the ability of macrophages to ingest apoptotic cells (by 21 ± 1.4%, P<0.05 compared to control). AMPK activation resulted in cytoskeletal reorganization, including enhanced formation of actin and microtubule networks. Activation of PAK1/2 and WAVE2, which are downstream effectors of Rac1, accompanied AMPK activation. AMPK activation also induced phosphorylation of CLIP-170, a protein that participates in microtubule synthesis. The increase in phagocytosis was reversible by the specific AMPK inhibitor compound C, siRNA to AMPKα1, Rac1 inhibitors, or agents that disrupt actin or microtubule networks. In vivo, AMPK activation resulted in enhanced phagocytosis of bacteria in the lungs by 75 ± 5% vs. control (P<0.05). These results demonstrate a novel function for AMPK in enhancing the phagocytic activity of neutrophils and macrophages.
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Affiliation(s)
- Hong-Beom Bae
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Zhou H, Bian D, Jiao X, Wei Z, Zhang H, Xia Y, He Y, Dai Y. Paeoniflorin protects against lipopolysaccharide-induced acute lung injury in mice by alleviating inflammatory cell infiltration and microvascular permeability. Inflamm Res 2011; 60:981-90. [PMID: 21744312 DOI: 10.1007/s00011-011-0359-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 06/20/2011] [Accepted: 06/21/2011] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE The present study aims to explore the effects of paeoniflorin (PF), a monoterpene glycoside isolated from the roots of Paeonia lactiflora Pallas, on acute lung injury (ALI) and the possible mechanisms. MATERIALS AND METHOD ALI was induced in mice by an intratracheal instillation of lipopolysaccharide (LPS, 1 mg/kg), and PF was injected intraperitoneally 30 min prior to LPS administration. After 24 h, lung water content, histology, microvascular permeability and proinflammatory cytokines in the bronchoaveolar lavage fluid were evaluated. RESULTS It was shown that PF (50, 100 mg/kg) could alleviate LPS-induced ALI, evidenced by reduced pulmonary edema, improved histological changes, and attenuated inflammatory cell accumulation in the interstitium and alveolar space as well as microvascular permeability. It also markedly down-regulated the expressions of proinflammatory cytokines interleukin (IL)-1β and tumor necrosis factor (TNF)-α at both transcription and protein levels. Additionally, PF inhibited the phosphorylations of p38 MAP kinase (p38) and c-Jun NH2-terminal kinase (JNK) but not extracellular signal-regulated kinase (ERK), and prevented the activation of nuclear factor-kappa B (NF-κB) in the lung tissues. CONCLUSION The findings suggest that PF is able to alleviate ALI, and the underlying mechanisms are probably attributed to decreasing the production of proinflammatory cytokines through down-regulation of the activation of p38, JNK and NF-κB pathways in lung tissues.
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Affiliation(s)
- Haiqiang Zhou
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
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Kojima K, Arikawa T, Saita N, Goto E, Tsumura S, Tanaka R, Masunaga A, Niki T, Oomizu S, Hirashima M, Kohrogi H. Galectin-9 attenuates acute lung injury by expanding CD14- plasmacytoid dendritic cell-like macrophages. Am J Respir Crit Care Med 2011; 184:328-39. [PMID: 21562126 DOI: 10.1164/rccm.201010-1566oc] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
RATIONALE Galectin (Gal)-9 plays a crucial role in the modulation of innate and adaptive immunity. OBJECTIVES To investigate whether Gal-9 plays a role in a murine acute lung injury (ALI) model. METHODS C57BL/6 mice were pretreated with Gal-9 by subcutaneous injection 24 and 48 hours before intranasal LPS inoculation. MEASUREMENTS AND MAIN RESULTS Gal-9 suppressed pathological changes of ALI induced by LPS. Gal-9 reduced levels of proinflammatory cytokines and chemokines, such as tumor necrosis factor (TNF)-α, IL-1β, IL-6, and keratinocyte-derived cytokine; decreased neutrophils; and increased IL-10 and CD11b(+)Gr-1(+) macrophages in the bronchoalveolar lavage fluid of ALI mice. In Gal-9-deficient mice, pathological changes of ALI were exaggerated, and the number of neutrophils and the TNF-α level were increased. CD11b(+)Gr-1(+) cells were increased in the spleen of both Gal-9-treated and phosphate-buffered saline (PBS)-treated ALI mice, but only Gal-9 increased the ability of CCR2-expressing macrophages to migrate toward monocyte chemoattractant protein-1. Transfer of CD11b(+)Gr-1(+) macrophages obtained from Gal-9-treated mice ameliorated ALI. CD11b(+)Gr-1(+) macrophages obtained from Gal-9-treated but not PBS-treated mice suppressed TNF-α and keratinocyte-derived cytokine production from LPS-stimulated macrophages, and down-regulated Toll-like receptor-4 (TLR4) and TLR2 expression on thioglycollate-elicited macrophages. Fluorescence-activated cell-sorting analysis revealed that CD14 is negligible on CD11b(+)Gr-1(+) macrophages obtained from Gal-9-treated mice, although those from both groups resembled plasmacytoid dendritic cells (pDCs). Gal-9 down-regulated CD14 on pDC-like macrophages from PBS-treated mice independently of Gal-9/Tim-3 (T-cell immunoglobulin- and mucin domain-containing molecule-3) interaction, resulting in the acquisition of suppressive function, suggesting that the loss of CD14 by Gal-9 is critical for the suppression of pDC-like macrophages. CONCLUSIONS Gal-9 attenuates ALI by expanding CD14(-)CD11b(+)Gr-1(+) pDC-like macrophages by preferentially suppressing macrophage functions to release proinflammatory cytokines through TLR4 and TLR2 down-regulation.
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Affiliation(s)
- Keisuke Kojima
- Department of Respiratory Medicine, Faculty of Life Science, Kumamoto University, Japan
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Stepanek O, Brdicka T, Angelisova P, Horvath O, Spicka J, Stockbauer P, Man P, Horejsi V. Interaction of late apoptotic and necrotic cells with vitronectin. PLoS One 2011; 6:e19243. [PMID: 21573223 PMCID: PMC3087723 DOI: 10.1371/journal.pone.0019243] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 03/30/2011] [Indexed: 11/25/2022] Open
Abstract
Background Vitronectin is an abundant plasma glycoprotein identified also as a part of extracellular matrix. Vitronectin is substantially enriched at sites of injured, fibrosing, inflamed, and tumor tissues where it is believed to be involved in wound healing and tissue remodeling. Little is known about the mechanism of vitronectin localization into the damaged tissues. Methodology/Principal Findings 2E12 antibody has been described to bind a subset of late apoptotic cells. Using immunoisolation followed by mass spectrometry, we identified the antigen recognized by 2E12 antibody as vitronectin. Based on flow cytometry, we described that vitronectin binds to the late apoptotic and necrotic cells in cell cultures in vitro as well as in murine thymus and spleen in vivo. Confocal microscopy revealed that vitronectin binds to an intracellular cytoplasmic structure after the membrane rupture. Conclusions/Significance We propose that vitronectin could serve as a marker of membrane disruption in necrosis and apoptosis for flow cytometry analysis. Moreover, we suggest that vitronectin binding to dead cells may represent one of the mechanisms of vitronectin incorporation into the injured tissues.
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Affiliation(s)
- Ondrej Stepanek
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Tomas Brdicka
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Pavla Angelisova
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Ondrej Horvath
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Jiri Spicka
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Petr Stockbauer
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Petr Man
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - Vaclav Horejsi
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
- * E-mail:
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Friggeri A, Yang Y, Banerjee S, Park YJ, Liu G, Abraham E. HMGB1 inhibits macrophage activity in efferocytosis through binding to the alphavbeta3-integrin. Am J Physiol Cell Physiol 2010; 299:C1267-76. [PMID: 20826760 DOI: 10.1152/ajpcell.00152.2010] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Phagocytosis of apoptotic cells is critical to resolution of inflammation. High mobility group box 1 protein (HMGB1), a mediator of inflammation, has been shown to diminish phagocytosis through binding to phosphatidylserine (PS) exposed on the surface of apoptotic neutrophils. However, it is currently unknown whether HMGB1 also modulates the activity of receptors involved in PS recognition on the surface of phagocytes. In the present studies, we found that preincubation of macrophages with HMGB1 decreased their ability to engulf apoptotic neutrophils or thymocytes. Preincubation of macrophages with HMGB1 prevented the enhancement of efferocytosis resulting from exposure to milk fat globule EGF factor 8 (MFG-E8), an opsonin that bridges PS and α(v)β(3) as well as α(v)β(5)-integrins on the surface of phagocytes. The inhibitory effect of HMGB1 on the phagocytic activity of macrophages was prevented by preincubation of HMGB1 with soluble α(v)β(3), but not with soluble α(v)β(5). HMGB1 colocalized with the β(3)-integrin on the cell membrane of macrophages and bound to soluble α(v)β(3), but not to soluble α(v)β(5). HMGB1 suppressed the interaction between MFG-E8 and α(v)β(3). HMGB1 also inhibited intracellular signaling events, including ERK phosphorylation and Rac-1 activation, which are activated in macrophages during phagocytosis of apoptotic cells. These results demonstrate that HMGB1 blocks α(v)β(3)-dependent recognition and uptake of apoptotic cells.
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Affiliation(s)
- Arnaud Friggeri
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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Duan GJ, Zhu J, Wan JY, Li X, Ge XD, Liu LM, Liu YS. A synthetic MD-2 mimetic peptide attenuates lipopolysaccharide-induced inflammatory responses in vivo and in vitro. Int Immunopharmacol 2010; 10:1091-100. [DOI: 10.1016/j.intimp.2010.06.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 05/20/2010] [Accepted: 06/15/2010] [Indexed: 10/19/2022]
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Zmijewski JW, Banerjee S, Bae H, Friggeri A, Lazarowski ER, Abraham E. Exposure to hydrogen peroxide induces oxidation and activation of AMP-activated protein kinase. J Biol Chem 2010; 285:33154-33164. [PMID: 20729205 DOI: 10.1074/jbc.m110.143685] [Citation(s) in RCA: 295] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Although metabolic conditions associated with an increased AMP/ATP ratio are primary factors in the activation of 5'-adenosine monophosphate-activated protein kinase (AMPK), a number of recent studies have shown that increased intracellular levels of reactive oxygen species can stimulate AMPK activity, even without a decrease in cellular levels of ATP. We found that exposure of recombinant AMPKαβγ complex or HEK 293 cells to H(2)O(2) was associated with increased kinase activity and also resulted in oxidative modification of AMPK, including S-glutathionylation of the AMPKα and AMPKβ subunits. In experiments using C-terminal truncation mutants of AMPKα (amino acids 1-312), we found that mutation of cysteine 299 to alanine diminished the ability of H(2)O(2) to induce kinase activation, and mutation of cysteine 304 to alanine totally abrogated the enhancing effect of H(2)O(2) on kinase activity. Similar to the results obtained with H(2)O(2)-treated HEK 293 cells, activation and S-glutathionylation of the AMPKα subunit were present in the lungs of acatalasemic mice or mice treated with the catalase inhibitor aminotriazole, conditions in which intracellular steady state levels of H(2)O(2) are increased. These results demonstrate that physiologically relevant concentrations of H(2)O(2) can activate AMPK through oxidative modification of the AMPKα subunit. The present findings also imply that AMPK activation, in addition to being a response to alterations in intracellular metabolic pathways, is directly influenced by cellular redox status.
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Affiliation(s)
- Jaroslaw W Zmijewski
- From the Department of Medicine, Birmingham, Alabama 35294-0012; Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama 35294-0012.
| | - Sami Banerjee
- From the Department of Medicine, Birmingham, Alabama 35294-0012
| | - Hongbeom Bae
- From the Department of Medicine, Birmingham, Alabama 35294-0012; Department of Anesthesiology and Pain Medicine, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Arnaud Friggeri
- From the Department of Medicine, Birmingham, Alabama 35294-0012
| | - Eduardo R Lazarowski
- Department of Medicine, University of North Carolina, Chapel Hill, North Carolina 27599-7248
| | - Edward Abraham
- From the Department of Medicine, Birmingham, Alabama 35294-0012; Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama 35294-0012.
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