1
|
Gaudreau PO, Cousineau I, Stagg J. Optimal CCN4 Immunofluorescence for Tissue Microarray. Methods Mol Biol 2023; 2582:13-21. [PMID: 36370340 DOI: 10.1007/978-1-0716-2744-0_2] [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] [Indexed: 06/16/2023]
Abstract
CCN4 (also known as WNT1-Inducible Signaling Pathway Protein 1 or WISP1) is a 367 amino acid, 40 kDa protein located on chromosome 8q24.1-8q24.3. Prior studies have provided support for a pro-inflammatory role for CCN4. We have shown recently that CCN4 expression is associated with advanced disease, epithelial-mesenchymal transition, and an inflamed tumor microenvironment in multiple solid tumors. We detail here the CCN4 tissue microarray immunofluorescence protocol related to these findings.
Collapse
Affiliation(s)
- Pierre-Olivier Gaudreau
- Department of Oncology, Queen's University and Canadian Cancer Trials Group, Kingston, ON, Canada.
| | - Isabelle Cousineau
- Centre de recherche du Centre hospitalier de l'Université de Montréal, Institut du Cancer de Montréal, Montréal, QC, Canada
| | - John Stagg
- Centre de recherche du Centre hospitalier de l'Université de Montréal, Institut du Cancer de Montréal, Montréal, QC, Canada
- Faculté de Pharmacie, Université de Montréal, Montréal, QC, Canada
| |
Collapse
|
2
|
Mei S, Tang R, Hu Y, Feng J, Xu Q, Zhou Y, Zhong H, Gao Y, He Z, Xing S. Integrin β3 Mediates Sepsis and Mechanical Ventilation-Associated Pulmonary Fibrosis Through Glycometabolic Reprogramming. J Transl Med 2023; 103:100021. [PMID: 36748196 DOI: 10.1016/j.labinv.2022.100021] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/18/2022] [Accepted: 10/17/2022] [Indexed: 01/18/2023] Open
Abstract
Mechanical ventilation (MV) has become a clinical first-line treatment option for patients with respiratory failure. However, it was unclear whether MV further aggravates the process of sepsis-associated pulmonary fibrosis and eventually leads to sepsis and mechanical ventilation-associated pulmonary fibrosis (S-MVPF). This study aimed to explore the mechanism of S-MVPF concerning integrin β3 activation in glycometabolic reprogramming of lung fibroblasts. We found that MV exacerbated sepsis-associated pulmonary fibrosis induced by lipopolysaccharide, which was accompanied by proliferation of lung fibroblasts, increased deposition of collagen in lung tissue, and increased procollagen type I carboxy-terminal propeptide in the bronchoalveolar lavage fluid. A large number of integrin β3- and pyruvate kinase M2-positive fibroblasts were detected in lung tissue after stimulation with lipopolysaccharide and MV, with an increase in lactate dehydrogenase A expression and lactate levels. S-MVPF was primarily attenuated in integrin β3-knockout mice, which also resulted in a decrease in the levels of pyruvate kinase M2, lactate dehydrogenase A, and lactate. In conclusion, MV aggravated sepsis-associated pulmonary fibrosis, with glycometabolic reprogramming mediated by integrin β3 activation. Thus, integrin β3-mediated glycometabolic reprogramming might be a potential therapeutic target for S-MVPF.
Collapse
Affiliation(s)
- Shuya Mei
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Ri Tang
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yue Hu
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jinhua Feng
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Qiaoyi Xu
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yang Zhou
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Han Zhong
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yuan Gao
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Zhengyu He
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
| | - Shunpeng Xing
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
| |
Collapse
|
3
|
Davis MJ, Martin RE, Pinheiro GM, Hoke ES, Moyer S, Mayer-Barber KD, Chang YC, Kwon-Chung KJ. MDA5 signaling induces type 1 IFN- and IL-1-dependent lung vascular permeability which protects mice from opportunistic fungal infection. Front Immunol 2022; 13:931194. [PMID: 35967332 PMCID: PMC9368195 DOI: 10.3389/fimmu.2022.931194] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/29/2022] [Indexed: 11/13/2022] Open
Abstract
Lungs balance threat from primary viral infection, secondary infection, and inflammatory damage. Severe pulmonary inflammation induces vascular permeability, edema, and organ dysfunction. We previously demonstrated that poly(I:C) (pICLC) induced type 1 interferon (t1IFN) protected mice from Cryptococcus gattii (Cg) via local iron restriction. Here we show pICLC increased serum protein and intravenously injected FITC-dextran in the lung airspace suggesting pICLC induces vascular permeability. Interestingly, pICLC induced a pro-inflammatory signature with significant expression of IL-1 and IL-6 which depended on MDA5 and t1IFN. Vascular permeability depended on MDA5, t1IFN, IL-1, and IL-6. T1IFN also induced MDA5 and other MDA5 signaling components suggesting that positive feedback contributes to t1IFN dependent expression of the pro-inflammatory signature. Vascular permeability, induced by pICLC or another compound, inhibited Cg by limiting iron. These data suggest that pICLC induces t1IFN which potentiates pICLC-MDA5 signaling increasing IL-1 and IL-6 resulting in leakage of antimicrobial serum factors into lung airspace. Thus, induced vascular permeability may act as an innate defense mechanism against opportunistic fungal infection, such as cryptococcosis, and may be exploited as a host-directed therapeutic target.
Collapse
Affiliation(s)
- Michael J. Davis
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Rachel E. Martin
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Giovana M. Pinheiro
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Elizabeth S. Hoke
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Shannon Moyer
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Katrin D. Mayer-Barber
- Inflammation and Innate Immunity Unit, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Yun C. Chang
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Kyung J. Kwon-Chung
- Molecular Microbiology Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
- *Correspondence: Kyung J. Kwon-Chung,
| |
Collapse
|
4
|
Lai Y, Huang Y. Mechanisms of Mechanical Force Induced Pulmonary Vascular Endothelial Hyperpermeability. Front Physiol 2021; 12:714064. [PMID: 34671268 PMCID: PMC8521004 DOI: 10.3389/fphys.2021.714064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/30/2021] [Indexed: 12/27/2022] Open
Abstract
Mechanical ventilation is a supportive therapy for patients with acute respiratory distress syndrome (ARDS). However, it also inevitably produces or aggravates the original lung injury with pathophysiological changes of pulmonary edema caused by increased permeability of alveolar capillaries which composed of microvascular endothelium, alveolar epithelium, and basement membrane. Vascular endothelium forms a semi-selective barrier to regulate body fluid balance. Mechanical ventilation in critically ill patients produces a mechanical force on lung vascular endothelium when the endothelial barrier was destructed. This review aims to provide a comprehensive overview of molecular and signaling mechanisms underlying the endothelial barrier permeability in ventilator-induced lung jury (VILI).
Collapse
Affiliation(s)
- Yan Lai
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Critical Care Medicine, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yongbo Huang
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Critical Care Medicine, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| |
Collapse
|
5
|
Jin S, Ding X, Yang C, Li W, Deng M, Liao H, Lv X, Pitt BR, Billiar TR, Zhang LM, Li Q. Mechanical Ventilation Exacerbates Poly (I:C) Induced Acute Lung Injury: Central Role for Caspase-11 and Gut-Lung Axis. Front Immunol 2021; 12:693874. [PMID: 34349759 PMCID: PMC8327178 DOI: 10.3389/fimmu.2021.693874] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/02/2021] [Indexed: 11/22/2022] Open
Abstract
Background The mechanisms by which moderate tidal volume ventilation (MTV) exacerbates preexisting lung injury are unclear. We hypothesized that systemic endotoxemia via the gut-lung axis would lead to non-canonical and canonical inflammasome activation and pyroptosis in a two-hit model involving polyinosinic-polycytidylic acid (Poly(I:C)), a synthetic analog of dsRNA and MTV and that this would associate with acute lung injury (ALI). Methods Anesthetized mice were administered Poly(I:C) intratracheally and then 6 h later, they were mechanically ventilated for 4 h with otherwise non-injurious MTV (10ml/kg). Changes in intestinal and alveolar capillary permeability were measured. Further documentation of ALI was assessed by evans blue albumin permeability, protein and IL-1 family concentration in bronchoalveolar lavage fluid (BALF) or plasma, and histopathology in cohorts of wildtype (WT), whole body genetically ablated caspase-11 (caspase-11-/-), caspase-1/caspase-11 double knockout (caspase-1/11-/-), gasdermin D (GSDMD)-/-, nucleotide-binding domain leucine-rich repeat-containing protein 3 (NLRP3)-/- and advanced glycosylation end product-specific receptor (RAGE) -/- mice. Results Non-injurious MTV exacerbated the mild lung injury associated with Poly(I:C) administration. This included the disruption of alveolar-capillary barrier and increased levels of interleukin (IL)-6, high mobility group proteins 1 (HMGB-1), IL-1β in BALF and IL-18 in plasma. Combined (Poly(I:C)-MTV) injury was associated with increase in gastrointestinal permeability and endotoxin in plasma and BALF. Poly(I:C)-MTV injury was sensitive to caspase-11 deletion with no further contribution of caspase-1 except for maturation and release of IL-18 (that itself was sensitive to deletion of NLRP3). Combined injury led to large increases in caspase-1 and caspase-11. Genetic ablation of GSDMD attenuated alveolar-capillary disruption and release of cytokines in combined injury model. Conclusions The previously noted exacerbation of mild Poly(I:C)-induced ALI by otherwise non-injurious MTV is associated with an increase in gut permeability resulting in systemic endotoxemia. The gut-lung axis resulted in activation of pulmonary non-canonical (cytosolic mediated caspase-11 activation) and canonical (caspase-1) inflammasome (NLRP3) mediated ALI in this two-hit model resulting in GSDMD sensitive alveolar capillary barrier disruption, pyroptosis (alveolar macrophages) and cytokine maturation and release (IL-1β; IL-18). Pharmacologic strategies aimed at disrupting communication between gut and lung, inhibition of inflammasomes or GSDMD in pyroptosis may be useful in ALI.
Collapse
MESH Headings
- Acute Lung Injury/chemically induced
- Acute Lung Injury/enzymology
- Acute Lung Injury/microbiology
- Acute Lung Injury/pathology
- Animals
- Bacteria/metabolism
- Caspases, Initiator/genetics
- Caspases, Initiator/metabolism
- Disease Models, Animal
- Gastrointestinal Microbiome
- Intestines/microbiology
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- Lipopolysaccharides/metabolism
- Lung/enzymology
- Lung/pathology
- Macrophages, Alveolar/enzymology
- Macrophages, Alveolar/pathology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- NLR Family, Pyrin Domain-Containing 3 Protein/genetics
- NLR Family, Pyrin Domain-Containing 3 Protein/metabolism
- Phosphate-Binding Proteins/genetics
- Phosphate-Binding Proteins/metabolism
- Poly I-C
- Pyroptosis
- Receptor for Advanced Glycation End Products/genetics
- Receptor for Advanced Glycation End Products/metabolism
- Respiration, Artificial
- Signal Transduction
- Ventilator-Induced Lung Injury/enzymology
- Ventilator-Induced Lung Injury/etiology
- Ventilator-Induced Lung Injury/microbiology
- Ventilator-Induced Lung Injury/pathology
- Mice
Collapse
Affiliation(s)
- Shuqing Jin
- Department of Anesthesiology, Shanghai Pulmonary Hospital, TongJi University, Shanghai, China
- Department of Surgery, University of Pittsburgh Medical School, Pennsylvania, PA, United States
| | - Xibing Ding
- Department of Anesthesiology, Renji Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
| | - Chenxuan Yang
- Department of Surgery, University of Pittsburgh Medical School, Pennsylvania, PA, United States
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Wenbo Li
- Department of Surgery, University of Pittsburgh Medical School, Pennsylvania, PA, United States
| | - Meihong Deng
- Department of Surgery, The Ohio State University, Ohio, OH, United States
| | - Hong Liao
- Department of Surgery, University of Pittsburgh Medical School, Pennsylvania, PA, United States
| | - Xin Lv
- Department of Anesthesiology, Shanghai Pulmonary Hospital, TongJi University, Shanghai, China
| | - Bruce R. Pitt
- Department of Environmental Occupational Health, University of Pittsburgh Graduate School Public Health, Pennsylvania, PA, United States
| | - Timothy R. Billiar
- Department of Surgery, University of Pittsburgh Medical School, Pennsylvania, PA, United States
| | - Li-Ming Zhang
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh School of Medicine, Pennsylvania, PA, United States
| | - Quan Li
- Department of Anesthesiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China
| |
Collapse
|
6
|
Yu Z, Wang T, Zhang L, Yang X, Li Q, Ding X. WISP1 and TLR4 on Macrophages Contribute to Ventilator-Induced Lung Injury. Inflammation 2021; 43:425-432. [PMID: 32130574 PMCID: PMC7170822 DOI: 10.1007/s10753-019-01103-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Injurious mechanical ventilation has been shown to directly affect pulmonary and systemic immune responses. How these responses propagate or attenuate remains unknown. The goal of this study was to further determine whether toll-like receptor (TLR) 4 and WNT1-inducible signaling pathway protein 1 (WISP1) could contribute to injurious mechanical ventilation, especially focusing on the role of macrophages during experimental ventilator-induced lung injury. A prospective, randomized, and controlled animal study was designed, and male, wild-type (WT) C57BL/6 mice, TLR4 knockout (TLR4-/-), and lyzTLR4 knockout (lyzTLR4-/-) mice aging 8~12 weeks were used. Animals were anesthetized and randomized to spontaneous breathing (SB) group or to high tidal volume (VT, 20 ml/kg) mechanical ventilation (HTV) group. Histological evaluation, alveolar-capillary permeability of Evan's blue albumin (EBA), WISP1 protein levels, macrophage inflammatory protein-2 (MIP-2), and interleukin-6 (IL-6) in plasma and bronchoalveolar lavage fluid (BALF) concentrations were analyzed. HTV group was associated with a significant increase of WISP1 and EBA ratio in C57BL/6 mice, a significant decrease of WISP1 protein levels, and a significant decrease of IL-6, MIP-2 in plasma, and BALF concentrations of pro-inflammatory cytokines in TLR4-/- and lyzTLR4-/- knockout mice. In TLR4-/- mice and lyzTLR4-/- mice, there were also significant differences between SB group and HTV group in terms of H&E score and EBA ratio and level of pro-inflammation cytokines. The entire TLR4-targeted mice could further improve various inflammatory changes and damages when compared with lyzTLR4-targeted mice. What is more, TLR4-/- mice and lyzTLR4-/- mice reacted differently to rWISP1 and/or BMMC treated. TLR4-/- mice had no response to rWISP1, while lyzTLR4-/- mice still showed drastic response to both treatments. TLR4 and WISP1, especially the former one, on macrophages could contribute to releasing of pro-inflammatory cytokines during ventilator-induced lung injury. Injurious mechanical ventilation may result in an immune response which is similar to that of infection.
Collapse
Affiliation(s)
- Zhuang Yu
- Department of Anesthesiology, Shanghai General Hospital, Jiaotong University School of Medicine, Shanghai, China
| | - Tingting Wang
- Department of Anesthesiology, Huashan Hospital, Fudan University School of Medicine, Shanghai, China
| | - Liming Zhang
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Xiaohu Yang
- Department of Anesthesiology, Shanghai East Hospital, Shanghai, China.
| | - Quan Li
- Department of Anesthesiology, Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen, China.
| | - Xibing Ding
- Department of Anesthesiology, Shanghai Renji Hospital, Jiaotong University School of Medicine, Shanghai, China.
| |
Collapse
|
7
|
Wang L, Yang Z, Wu Z, He J, Xu S, Li D, Zou Q, Yuan Y. Increased expression of cystathionine beta-synthase and chemokine ligand 21 is closely associated with poor prognosis in extrahepatic cholangiocarcinoma. Medicine (Baltimore) 2020; 99:e22255. [PMID: 32957374 PMCID: PMC7505348 DOI: 10.1097/md.0000000000022255] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The expression of Cystathionine beta-synthase (CBS) and Chemokine ligand 21 (CCL21) is associated with the tumorigenesis and progression of a variety of tumors, but whether alterations in their expression levels correlates with the carcinogenesis and progression of EHCC is still unknown. This study investigated the clinicopathological significance of CBS and CCL21 expression in EHCC.We investigated the correlations between the expression of CBS and CCL21 and clinicopathological characteristics in EHCC using EnVision immunohistochemistry.The expression of CBS and CCL21 was significantly higher in EHCC tumors than in nontumor tissues (P < .05 and P < .01). EHCC patients with CBS and CCL21 expression combined with lymph node metastasis, tumor cell invasion, and TNM III/IV stage had more severe conditions than those with no lymph node metastasis, distant invasion and TNM I/II stage (P < .01). Kaplan-Meier survival analysis showed that the overall survival rates for EHCC patients with negative CBS or CCL21 reaction were significantly higher than those for patients with positive CBS or CCL21 reaction((P < .01). CBS or CCL21 expression was revealed as an independent poor prognostic factor for EHCC patients by Cox multivariate analysis.The present study indicates that CBS and CCL21 expression is closely associated with the pathogenesis of clinical, pathological and biological behaviors and poor prognosis in EHCC.
Collapse
Affiliation(s)
- Lingxiang Wang
- Hunan Provincial Key Laboratory of Hepatobiliary Disease Research, Department of General Surgery
| | - Zhulin Yang
- Hunan Provincial Key Laboratory of Hepatobiliary Disease Research, Department of General Surgery
| | - Zhengchun Wu
- Hunan Provincial Key Laboratory of Hepatobiliary Disease Research, Department of General Surgery
| | - Jun He
- Hunan Provincial Key Laboratory of Hepatobiliary Disease Research, Department of General Surgery
| | - Shu Xu
- Hunan Provincial Key Laboratory of Hepatobiliary Disease Research, Department of General Surgery
| | - Daiqiang Li
- Department of Pathology, Second Xiangya Hospital
| | - Qiong Zou
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Yuan Yuan
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| |
Collapse
|
8
|
Liu N, Lin X, Huang C. Activation of the reverse transsulfuration pathway through NRF2/CBS confers erastin-induced ferroptosis resistance. Br J Cancer 2019; 122:279-292. [PMID: 31819185 PMCID: PMC7052275 DOI: 10.1038/s41416-019-0660-x] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 11/02/2019] [Accepted: 11/08/2019] [Indexed: 12/26/2022] Open
Abstract
Background Ferroptosis is an iron-dependent, lipid peroxide-mediated cell death that may be exploited to selective elimination of damaged and malignant cells. Recent studies have identified that small-molecule erastin specifically inhibits transmembrane cystine–glutamate antiporter system xc−, prevents extracellular cystine import and ultimately causes ferroptosis in certain cancer cells. In this study, we aimed to investigate the molecular mechanism underlying erastin-induced ferroptosis resistance in ovarian cancer cells. Methods We treated ovarian cancer cells with erastin and examined cell viability, cellular ROS and metabolites of the transsulfuration pathway. We also depleted cystathionine β-synthase (CBS) and NRF2 to investigate the CBS and NRF2 dependency in erastin-resistant cells. Results We found that prolonged erastin treatment induced ferroptosis resistance. Upon exposure to erastin, cells gradually adapted to cystine deprivation via sustained activation of the reverse transsulfuration pathway, allowing the cells to bypass erastin insult. CBS, the biosynthetic enzyme for cysteine, was constantly upregulated and was critical for the resistance. Knockdown of CBS by RNAi in erastin-resistant cells caused ferroptotic cell death, while CBS overexpression conferred ferroptosis resistance. We determined that the antioxidant transcriptional factor, NRF2 was constitutively activated in erastin-resistant cells and NRF2 transcriptionally upregulated CBS. Genetically repression of NRF2 enhanced ferroptosis susceptibility. Conclusions Based on these results, we concluded that constitutive activation of NRF2/CBS signalling confers erastin-induced ferroptosis resistance. This study demonstrates a new mechanism underlying ferroptosis resistance, and has implications for the therapeutic response to erastin-induced ferroptosis.
Collapse
Affiliation(s)
- Nan Liu
- Division of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Xiaoli Lin
- Division of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Chengying Huang
- Division of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| |
Collapse
|
9
|
The IL-33-ST2 Pathway Contributes to Ventilator-Induced Lung Injury in Septic Mice in a Tidal Volume-Dependent Manner. Shock 2019; 52:e1-e11. [DOI: 10.1097/shk.0000000000001260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
10
|
Marechal D, Brault V, Leon A, Martin D, Lopes Pereira P, Loaëc N, Birling MC, Friocourt G, Blondel M, Herault Y. Cbs overdosage is necessary and sufficient to induce cognitive phenotypes in mouse models of Down syndrome and interacts genetically with Dyrk1a. Hum Mol Genet 2019; 28:1561-1577. [PMID: 30649339 DOI: 10.1093/hmg/ddy447] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/17/2018] [Accepted: 12/18/2018] [Indexed: 01/16/2023] Open
Abstract
Identifying dosage-sensitive genes is a key to understand the mechanisms underlying intellectual disability in Down syndrome (DS). The Dp(17Abcg1-Cbs)1Yah DS mouse model (Dp1Yah) shows cognitive phenotypes that need to be investigated to identify the main genetic driver. Here, we report that three copies of the cystathionine-beta-synthase gene (Cbs) in the Dp1Yah mice are necessary to observe a deficit in the novel object recognition (NOR) paradigm. Moreover, the overexpression of Cbs alone is sufficient to induce deficits in the NOR test. Accordingly, overexpressing human CBS specifically in Camk2a-expressing neurons leads to impaired objects discrimination. Altogether, this shows that Cbs overdosage is involved in DS learning and memory phenotypes. To go further, we identified compounds that interfere with the phenotypical consequence of CBS overdosage in yeast. Pharmacological intervention in Tg(CBS) mice with one selected compound restored memory in the NOR test. In addition, using a genetic approach, we demonstrated an epistatic interaction between Cbs and Dyrk1a, another human chromosome 21-located gene (which encodes the dual-specificity tyrosine phosphorylation-regulated kinase 1a) and an already known target for DS therapeutic intervention. Further analysis using proteomic approaches highlighted several molecular pathways, including synaptic transmission, cell projection morphogenesis and actin cytoskeleton, that are affected by DYRK1A and CBS overexpression. Overall, we demonstrated that CBS overdosage underpins the DS-related recognition memory deficit and that both CBS and DYRK1A interact to control accurate memory processes in DS. In addition, our study establishes CBS as an intervention point for treating intellectual deficiencies linked to DS.
Collapse
Affiliation(s)
- Damien Marechal
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Véronique Brault
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Alice Leon
- Inserm UMR 1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest, France
| | - Dehren Martin
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Patricia Lopes Pereira
- Transgenese et Archivage Animaux Modèles, TAAM, CNRS, 3B Rue de la Férollerie Orléans, France
| | - Nadege Loaëc
- Inserm UMR 1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest, France
| | | | - Gaelle Friocourt
- Inserm UMR 1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest, France
| | - Marc Blondel
- Inserm UMR 1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest, France
| | - Yann Herault
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, Illkirch, France
- Université de Strasbourg, Illkirch, France
- CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, ICS, Illkirch, France
| |
Collapse
|
11
|
Gaudreau PO, Clairefond S, Class CA, Boulay PL, Chrobak P, Allard B, Azzi F, Pommey S, Do KA, Saad F, Trudel D, Young M, Stagg J. WISP1 is associated to advanced disease, EMT and an inflamed tumor microenvironment in multiple solid tumors. Oncoimmunology 2019; 8:e1581545. [PMID: 31069142 PMCID: PMC6492985 DOI: 10.1080/2162402x.2019.1581545] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 01/21/2019] [Accepted: 02/06/2019] [Indexed: 02/08/2023] Open
Abstract
Background: WNT1-Inducible Signaling Pathway Protein 1 (WISP1) is implicated in prostate cancer growth and metastasis and the regulation of inflammation in diverse benign diseases. The objectives of this study were to assess the prognostic value of WISP1, its association to inflammation and its relevance as a biomarker for immune checkpoint blockade (ICB) response. Methods: Publicly available RNA-seq datasets were used to evaluate the prognostic value of WISP1 gene expression and its association with tumor-infiltrating lymphocytes, inflamed tumor microenvironment, and anti-PD-1 ICB response. A tissue microarray (TMA) including 285 radical prostatectomy specimens was used to confirm these associations in prostate cancer. The effect of recombinant WISP1 (rWISP1) on inflammatory cytokines was assessed in vitro. Results: High levels of WISP1 correlated with BCR-free survival in prostate adenocarcinoma and overall survival in primary melanoma, low-grade glioma, and kidney papillary cell carcinoma. Some effects could be accounted for by higher WISP1 expression in advanced disease. High WISP1 expression in prostate adenocarcinoma was correlated with CD8+ cells density. In vitro, rWISP1 increased inflammatory cytokine production. High WISP1 gene expression in RNA-seq datasets was correlated with gene signatures of multiple immune cell types as well as an inflammatory cytokine, immune checkpoint, and epithelial-mesenchymal transition (EMT) gene expression. WISP1 mRNA expression was associated with primary resistance to ICB in datasets showing EMT. Conclusions: Our results support an association between WISP1 expression and advanced disease, EMT and an inflamed tumor microenvironment in multiple solid tumors. The consequences of WISP1 expression on cancer immunotherapy remains to be addressed.
Collapse
Affiliation(s)
- Pierre-Olivier Gaudreau
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sylvie Clairefond
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Caleb A Class
- T. Boone Pickens Academic Tower, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Pierre-Luc Boulay
- Département de pharmacologie et de physiologie, Université de Montréal, Montreal, QC, Canada
| | - Pavel Chrobak
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Bertrand Allard
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Feryel Azzi
- Centre de Recherche du Centre Hospitalier Universitaire de Montréal (CRCHUM)/Institut du Cancer de Montréal, Montreal, QC, Canada
| | - Sandra Pommey
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Kim-Anh Do
- T. Boone Pickens Academic Tower, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Fred Saad
- Département d'Urologie du Centre Hospitalier Universitaire de Montréal (CHUM) et Institut du Cancer de Montréal / CRCHUM, Montreal, QC, Canada
| | - Dominique Trudel
- Centre Hospitalier de l'Université de Montréal (Département de pathologie), Département de pathologie et axe cancer, Université de Montréal (Département de pathologie et de biologie cellulaire) et Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, Quebec, Canada
| | - Marian Young
- NIDCR, National Institutes of Health, Bethesda, MD, USA
| | - John Stagg
- Faculté de Pharmacie, Université de Montréal et Institut du Cancer de Montréal / CRCHUM, Axe Cancer, Montreal, QC, Canada
| |
Collapse
|
12
|
Non‑canonical Wnt signaling contributes to ventilator‑induced lung injury through upregulation of WISP1 expression. Int J Mol Med 2019; 43:1217-1228. [PMID: 30664165 PMCID: PMC6365043 DOI: 10.3892/ijmm.2019.4067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/17/2018] [Indexed: 12/25/2022] Open
Abstract
Mechanical ventilation may cause ventilator-induced lung injury (VILI). Canonical Wnt signaling has been reported to serve an important role in the pathogenesis of VILI. Bioinformatics analysis revealed that canonical and non-canonical Wnt signaling pathways were activated in VILI. However, the role of non-canonical Wnt signaling in the pathogenesis of VILI remains unclear. The present study aimed to analyze the potential role of non-canonical Wnt signaling in VILI pathogenesis. Lung injury was assessed via Evans blue albumin permeability and histological scoring, as well as by inflammatory cytokine expression and total protein concentration in bronchoalveolar lavage fluid. The relative protein expression of canonical and non-canonical Wnt signaling pathway components were examined via western blotting and immunohistochemistry. The results demonstrated that 6 h of mechanical ventilation at low tidal volume (LTV; 6 ml/kg) or moderate tidal volume (MTV; 12 ml/kg) induced lung injury in sensitive A/J mice. Ventilation with MTV increased the protein levels of Wnt-induced secreted protein 1 (WISP1), Rho-associated protein kinase 1 (ROCK1), phosphorylated (p)-Ras homolog gene family, member A and p-C-Jun N-terminal kinase (JNK). Inhibition of ROCK1 by Y27632 and JNK by SP600125 attenuated MTV-induced lung injury and decreased the expression of proteins involved in non-canonical Wnt signaling, including WISP1. In conclusion, non-canonical Wnt signaling participates in VILI by modulating WISP1 expression, which has been previously noted as critical for VILI development. Therefore, the non-canonical Wnt signaling pathway may provide a preventive and therapeutic target in VILI.
Collapse
|
13
|
Ding X, Tong Y, Jin S, Chen Z, Li T, Billiar TR, Pitt BR, Li Q, Zhang LM. Mechanical ventilation enhances extrapulmonary sepsis-induced lung injury: role of WISP1-αvβ5 integrin pathway in TLR4-mediated inflammation and injury. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2018; 22:302. [PMID: 30445996 PMCID: PMC6240278 DOI: 10.1186/s13054-018-2237-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 10/15/2018] [Indexed: 12/19/2022]
Abstract
Background High tidal volume ventilation of healthy lungs or exacerbation of existing acute lung injury (ALI) by more moderate mechanical ventilation (MTV) produces ventilator-induced lung injury. It is less clear whether extrapulmonary sepsis sensitizes the lung to MTV. Methods We used a two-hit model of cecal ligation and puncture (CLP) followed 12 h later by MTV (10 ml/kg; 6 h) to determine whether otherwise noninjurious MTV enhances CLP-induced ALI by contrasting wildtype and TLR4−/− mice with respect to: alveolar-capillary permeability, histopathology and intrapulmonary levels of WNT-inducible secreted protein 1 (WISP1) and integrin β5; plasma levels of cytokines and chemokines (TNF-α, IL-6, MIP-2, MCP-1) and intrapulmonary neutrophil infiltration; and other inflammatory signaling via intrapulmonary activation of JNK, p38 and ERK. A separate cohort of mice was pretreated with intratracheal neutralizing antibodies to WISP1, integrin β5 or IgG as control and the presented phenotyping repeated in a two-hit model; there were 10 mice per group in these first three experiments. Also, isolated peritoneal macrophages (PM) from wildtype and TLR4−/−, MyD88−/− and TRIF−/− mice were used to identify a WISP1–TLR4–integrin β5 pathway; and the requisite role of integrin β5 in WISP1-induced cytokine and chemokine production in LPS-primed PM was examined by siRNA treatment. Results MTV, that in itself did not cause ALI, exacerbated increases in alveolar-capillary permeability, histopathologic scoring and indices of pulmonary inflammation in mice that previously underwent CLP; the effects of this two-hit model were abrogated in TLR4−/− mice. Attendant with these findings was a significant increase in intrapulmonary WISP1 and integrin β5 in the two-hit model. Anti-WISP1 or anti-integrin β5 antibodies partially inhibited the two-hit phenotype. In PM, activation of TLR4 led to an increase in integrin β5 expression that was MyD88 and NF-κB dependent. Recombinant WISP1 increased LPS-induced cytokine release in PM that was inhibited by silencing either TLR4 or integrin β5. Conclusions These data show for the first time that otherwise noninjurious mechanical ventilation can exacerbate ALI due to extrapulmonary sepsis underscoring a potential interactive contribution of common events (sepsis and mechanical ventilation) in critical care, and that a WISP1–TLR4–integrin β5 pathway contributes to this phenomenon. Electronic supplementary material The online version of this article (10.1186/s13054-018-2237-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Xibing Ding
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Anesthesiology, University of Pittsburgh School of Medicine, 200 Lothrop St. UPMC MUH N467, Pittsburgh, 15213, PA, USA.,Department of Anesthesiology, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yao Tong
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China
| | - Shuqing Jin
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Zhixia Chen
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China
| | - Tunliang Li
- Department of Anesthesiology, Xiangya 3rd Hospital, Central South University, Hunan, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Bruce R Pitt
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School Public Health, Pittsburgh, PA, USA
| | - Quan Li
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China. .,Department of Anesthesiology, Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen, China.
| | - Li-Ming Zhang
- Department of Anesthesiology, University of Pittsburgh School of Medicine, 200 Lothrop St. UPMC MUH N467, Pittsburgh, 15213, PA, USA.
| |
Collapse
|
14
|
Tsai HC, Tzeng HE, Huang CY, Huang YL, Tsai CH, Wang SW, Wang PC, Chang AC, Fong YC, Tang CH. WISP-1 positively regulates angiogenesis by controlling VEGF-A expression in human osteosarcoma. Cell Death Dis 2017; 8:e2750. [PMID: 28406476 PMCID: PMC5477571 DOI: 10.1038/cddis.2016.421] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/13/2016] [Accepted: 11/17/2016] [Indexed: 12/14/2022]
Abstract
In recent years, much research has focused on the role of angiogenesis in osteosarcoma, which occurs predominantly in adolescents and young adults. The vascular endothelial growth factor-A (VEGF-A) pathway is the key regulator of angiogenesis and in osteosarcoma. VEGF-A expression has been recognized as a prognostic marker in angiogenesis. Aberrant WNT1-inducible signaling pathway protein-1 (WISP-1) expression is associated with various cancers. However, the function of WISP-1 in osteosarcoma angiogenesis is poorly understood. We demonstrate a positive correlation between WISP-1 and VEGF-A expression in human osteosarcoma. Moreover, we show that WISP-1 promotes VEGF-A expression in human osteosarcoma cells, subsequently inducing human endothelial progenitor cell (EPC) migration and tube formation. The focal adhesion kinase (FAK), Jun amino-terminal kinase (JNK), and hypoxia-inducible factor (HIF)-1α signaling pathways were activated after WISP-1 stimulation, while FAK, JNK, and HIF-1α inhibitors or small interfering RNA (siRNA) abolished WISP-1-induced VEGF-A expression and angiogenesis. In vitro and in vivo studies revealed down-regulation of microRNA-381 (miR-381) in WISP-1-induced VEGF-A expression and angiogenesis. Our findings reveal that WISP-1 enhances VEGF-A expression and angiogenesis through the FAK/JNK/HIF-1α signaling pathways, as well as via down-regulation of miR-381 expression. WISP-1 may be a promising target in osteosarcoma angiogenesis.
Collapse
Affiliation(s)
- Hsiao-Chi Tsai
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | - Huey-En Tzeng
- Division of Hematology/Oncology, Department of Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,School of Medicine, China Medical University, Taichung, Taiwan
| | - Chun-Yin Huang
- School of Medicine, China Medical University, Taichung, Taiwan.,Department of Orthopaedic Surgery, China Medical University Beigang Hospital, Yun-Lin County, Taiwan
| | - Yuan-Li Huang
- Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan
| | - Chun-Hao Tsai
- School of Medicine, China Medical University, Taichung, Taiwan.,Department of Orthopedic Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Po-Chuan Wang
- Department of Gastroenterology, Hsinchu MacKay Memorial Hospital, Hsinchu City, Taiwan
| | - An-Chen Chang
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Yi-Chin Fong
- Department of Orthopaedic Surgery, China Medical University Beigang Hospital, Yun-Lin County, Taiwan.,Department of Sports Medicine, College of Health Care, China Medical University, Taichung, Taiwan
| | - Chih-Hsin Tang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan.,School of Medicine, China Medical University, Taichung, Taiwan.,Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan
| |
Collapse
|
15
|
WISP1-αvβ3 integrin signaling positively regulates TLR-triggered inflammation response in sepsis induced lung injury. Sci Rep 2016; 6:28841. [PMID: 27349568 PMCID: PMC4923866 DOI: 10.1038/srep28841] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 06/08/2016] [Indexed: 01/11/2023] Open
Abstract
We recently noted that the matricellular protein WISP1 contributes to sepsis induced acute lung injury (ALI) via integrin β6. In the current study, we pursued further aspects of WISP1 modulation of TLR signaling in lungs of mice after sepsis and TLR4 mediated release of TNF-α in macrophages. After confirming that TLR4 and CD14 are critical in transducing sepsis mediated ALI, we now demonstrate that intrapulmonary αvβ3 is increased by polymicrobrial sepsis in a TLR4, CD14 dependent fashion. Comparison of cultured macrophages revealed that WISP1 increased release of TNF-α from RAW264.7 cells with baseline expression of αvβ3, but primary cultures of peritoneal macrophages (PMø) required activation of TLR4 to induce de novo synthesis of αvβ3 enabling WISP1 to stimulate release of TNF-α. The specific requirement for β3 integrin was apparent when the effect of WISP1 was lost in PMø isolated from β3(-/-) mice. WISP1 enhanced TLR4 mediated ERK signaling and U0126 (an ERK inhibitor) blocked LPS induced β3 integrin expression and WISP1 enhanced TNF-α release. Collectively these data suggest that WISP1-αvβ3 integrin signaling is involved in TLR4 pathways in macrophages and may be an important contributor to TLR4/CD14 mediated inflammation in sepsis induced lung injury.
Collapse
|