1
|
Xiao Y, Martinez L, Zigmond Z, Woltmann D, Singer DV, Singer HA, Vazquez-Padron RI, Salman LH. Functions for platelet factor 4 (PF4/CXCL4) and its receptors in fibroblast-myofibroblast transition and fibrotic failure of arteriovenous fistulas (AVFs). J Vasc Access 2023:11297298231192386. [PMID: 37589266 PMCID: PMC10998683 DOI: 10.1177/11297298231192386] [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] [Indexed: 08/18/2023] Open
Abstract
BACKGROUND Over 60% of End Stage Renal Disease (ESRD) patients are relying on hemodialysis (HD) to survive, and the arteriovenous fistula (AVF) is the preferred vascular access method for HD. However approximately half of all newly created AVF fail to mature and cannot be used without a salvage procedure. We have recently demonstrated an association between AVF maturation failure and post-operative fibrosis, while our RNA-seq study also revealed that veins that ultimately failed during AVF maturation had elevated levels of platelet factor 4 (PF4/CXCL4). However, a link between these two findings was yet to be established. METHODS In this study, we investigated potential mechanisms between PF4 levels and fibrotic remodeling in veins. We compared the local expression of PF4 and fibrosis marker integrin β6 (ITGB6) in veins that successfully underwent maturation with that in veins that ultimately failed to mature. We also measured the changes of expression level of α-smooth muscle actin (αSMA/ACTA2) and collagen (Col1/COL1A1) in venous fibroblasts upon various treatments, such as PF4 pharmacological treatment, alteration of PF4 expression, and blocking of PF4 receptors. RESULTS We found that PF4 is expressed in veins and co-localizes with αSMA. In venous fibroblasts, PF4 stimulates expression of αSMA and Col1 via different pathways. The former requires integrins αvβ5 and α5β1, while chemokine receptor CXCR3 is needed for the latter. Interestingly, we also discovered that the expression of PF4 is associated with that of ITGB6, the β subunit of integrin αvβ6. This integrin is critical for the activation of the major fibrosis factor TGFβ, and overexpression of PF4 promotes activation of the TGFβ pathway. CONCLUSIONS These results indicate that upregulation of PF4 may cause venous fibrosis both directly by stimulating fibroblast differentiation and expression of extracellular matrix (ECM) molecules and indirectly by facilitating the activation of the TGFβ pathway.
Collapse
Affiliation(s)
- Yuxuan Xiao
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Laisel Martinez
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Zachary Zigmond
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Daniel Woltmann
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Diane V Singer
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Harold A Singer
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Roberto I Vazquez-Padron
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Loay H Salman
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
- Division of Nephrology & Hypertension, Albany Medical College, Albany, NY, USA
| |
Collapse
|
2
|
Langlois B, Martin J, Schneider C, Hachet C, Terryn C, Rioult D, Martiny L, Théret L, Salesse S, Dedieu S. LRP-1-dependent control of calpain expression and activity: A new mechanism regulating thyroid carcinoma cell adhesion. Front Oncol 2022; 12:981927. [PMID: 36052226 PMCID: PMC9424861 DOI: 10.3389/fonc.2022.981927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/28/2022] [Indexed: 11/13/2022] Open
Abstract
The low-density lipoprotein receptor-related protein 1 (LRP1) is a multifunctional endocytic receptor mediating the clearance of various molecules from the extracellular matrix. LRP1 also regulates cell surface expression of matrix receptors by modulating both extracellular and intracellular signals, though current knowledge of the underlying mechanisms remains partial in the frame of cancer cells interaction with matricellular substrates. In this study we identified that LRP1 downregulates calpain activity and calpain 2 transcriptional expression in an invasive thyroid carcinoma cell model. LRP1-dependent alleviation of calpain activity limits cell-matrix attachment strength and contributes to FTC133 cells invasive abilities in a modified Boyden chamber assays. In addition, using enzymatic assays and co-immunoprecipitation experiments, we demonstrated that LRP1 exerts post-translational inhibition of calpain activity through PKA-dependent phosphorylation of calpain-2. This LRP-1 dual mode of control of calpain activity fine-tunes carcinoma cell spreading. We showed that LRP1-mediated calpain inhibition participates in talin-positive focal adhesions dissolution and limits β1-integrin expression at carcinoma cell surface. In conclusion, we identified an additional and innovative intracellular mechanism which demonstrates LRP-1 pro-motile action in thyroid cancer cells. LRP-1 ability to specifically control calpain-2 expression and activity highlights a novel facet of its de-adhesion receptor status.
Collapse
Affiliation(s)
- Benoit Langlois
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
- *Correspondence: Benoit Langlois,
| | - Julie Martin
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Christophe Schneider
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Cathy Hachet
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Christine Terryn
- Plate-Forme Imagerie Cellulaire et Tissulaire (PICT), Université de Reims Champagne-Ardenne, UFR Médecine, Reims, France
| | - Damien Rioult
- Plateau Technique Mobile de Cytométrie Environnementale MOBICYTE, Université de Reims Champagne-Ardenne/INERIS, Reims, France
| | - Laurent Martiny
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Louis Théret
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Stéphanie Salesse
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| | - Stéphane Dedieu
- UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
- Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, UMR 7369 CNRS, Reims, France
| |
Collapse
|
3
|
Hashiguchi S, Tanaka T, Mano R, Kondo S, Kodama S. CCN2-induced lymphangiogenesis is mediated by the integrin αvβ5-ERK pathway and regulated by DUSP6. Sci Rep 2022; 12:926. [PMID: 35042954 PMCID: PMC8766563 DOI: 10.1038/s41598-022-04988-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 01/05/2022] [Indexed: 12/20/2022] Open
Abstract
Lymphangiogenesis is essential for the development of the lymphatic system and is important for physiological processes such as homeostasis, metabolism and immunity. Cellular communication network factor 2 (CCN2, also known as CTGF), is a modular and matricellular protein and a well-known angiogenic factor in physiological and pathological angiogenesis. However, its roles in lymphangiogenesis and intracellular signaling in lymphatic endothelial cells (LECs) remain unclear. Here, we investigated the effects of CCN2 on lymphangiogenesis. In in vivo Matrigel plug assays, exogenous CCN2 increased the number of Podoplanin-positive vessels. Subsequently, we found that CCN2 induced phosphorylation of ERK in primary cultured LECs, which was almost completely inhibited by the blockade of integrin αvβ5 and partially decreased by the blockade of integrin αvβ3. CCN2 promoted direct binding of ERK to dual-specific phosphatase 6 (DUSP6), which regulated the activation of excess ERK by dephosphorylating ERK. In vitro, CCN2 promoted tube formation in LECs, while suppression of Dusp6 further increased tube formation. In vivo, immunohistochemistry also detected ERK phosphorylation and DUSP6 expression in Podoplanin-positive cells on CCN2-supplemented Matrigel. These results indicated that CCN2 promotes lymphangiogenesis by enhancing integrin αvβ5-mediated phosphorylation of ERK and demonstrated that DUSP6 is a negative regulator of excessive lymphangiogenesis by CCN2.
Collapse
Affiliation(s)
- Shiho Hashiguchi
- Department of Oral Surgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan.,Department of Regenerative Medicine and Transplantation, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Tomoko Tanaka
- Department of Regenerative Medicine and Transplantation, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Ryosuke Mano
- Department of Oral Surgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan.,Department of Regenerative Medicine and Transplantation, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Seiji Kondo
- Department of Oral Surgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Shohta Kodama
- Department of Regenerative Medicine and Transplantation, Faculty of Medicine, Fukuoka University, Fukuoka, Japan.
| |
Collapse
|
4
|
Leguit RJ, Raymakers RAP, Hebeda KM, Goldschmeding R. CCN2 (Cellular Communication Network factor 2) in the bone marrow microenvironment, normal and malignant hematopoiesis. J Cell Commun Signal 2021; 15:25-56. [PMID: 33428075 PMCID: PMC7798015 DOI: 10.1007/s12079-020-00602-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 12/20/2020] [Indexed: 02/06/2023] Open
Abstract
CCN2, formerly termed Connective Tissue Growth Factor, is a protein belonging to the Cellular Communication Network (CCN)-family of secreted extracellular matrix-associated proteins. As a matricellular protein it is mainly considered to be active as a modifier of signaling activity of several different signaling pathways and as an orchestrator of their cross-talk. Furthermore, CCN2 and its fragments have been implicated in the regulation of a multitude of biological processes, including cell proliferation, differentiation, adhesion, migration, cell survival, apoptosis and the production of extracellular matrix products, as well as in more complex processes such as embryonic development, angiogenesis, chondrogenesis, osteogenesis, fibrosis, mechanotransduction and inflammation. Its function is complex and context dependent, depending on cell type, state of differentiation and microenvironmental context. CCN2 plays a role in many diseases, especially those associated with fibrosis, but has also been implicated in many different forms of cancer. In the bone marrow (BM), CCN2 is highly expressed in mesenchymal stem/stromal cells (MSCs). CCN2 is important for MSC function, supporting its proliferation, migration and differentiation. In addition, stromal CCN2 supports the maintenance and longtime survival of hematopoietic stem cells, and in the presence of interleukin 7, stimulates the differentiation of pro-B lymphocytes into pre-B lymphocytes. Overexpression of CCN2 is seen in the majority of B-acute lymphoblastic leukemias, especially in certain cytogenetic subgroups associated with poor outcome. In acute myeloid leukemia, CCN2 expression is increased in MSCs, which has been associated with leukemic engraftment in vivo. In this review, the complex function of CCN2 in the BM microenvironment and in normal as well as malignant hematopoiesis is discussed. In addition, an overview is given of data on the remaining CCN family members regarding normal and malignant hematopoiesis, having many similarities and some differences in their function.
Collapse
Affiliation(s)
- Roos J. Leguit
- Department of Pathology, University Medical Center Utrecht, H04-312, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - Reinier A. P. Raymakers
- Department of Hematology, UMCU Cancer Center, Heidelberglaan 100 B02.226, 3584 CX Utrecht, The Netherlands
| | - Konnie M. Hebeda
- Department of Pathology, Radboud University Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Roel Goldschmeding
- Department of Pathology, University Medical Centre Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| |
Collapse
|
5
|
Campion O, Al Khalifa T, Langlois B, Thevenard-Devy J, Salesse S, Savary K, Schneider C, Etique N, Dedieu S, Devy J. Contribution of the Low-Density Lipoprotein Receptor Family to Breast Cancer Progression. Front Oncol 2020; 10:882. [PMID: 32850302 PMCID: PMC7406569 DOI: 10.3389/fonc.2020.00882] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/05/2020] [Indexed: 12/18/2022] Open
Abstract
The low-density lipoprotein receptor (LDLR) family comprises 14 single-transmembrane receptors sharing structural homology and common repeats. These receptors specifically recognize and internalize various extracellular ligands either alone or complexed with membrane-spanning co-receptors that are then sorted for lysosomal degradation or cell-surface recovery. As multifunctional endocytic receptors, some LDLR members from the core family were first considered as potential tumor suppressors due to their clearance activity against extracellular matrix-degrading enzymes. LDLRs are also involved in pleiotropic functions including growth factor signaling, matricellular proteins, and cell matrix adhesion turnover and chemoattraction, thereby affecting both tumor cells and their surrounding microenvironment. Therefore, their roles could appear controversial and dependent on the malignancy state. In this review, recent advances highlighting the contribution of LDLR members to breast cancer progression are discussed with focus on (1) specific expression patterns of these receptors in primary cancers or distant metastasis and (2) emerging mechanisms and signaling pathways. In addition, potential diagnosis and therapeutic options are proposed.
Collapse
Affiliation(s)
- Océane Campion
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Tesnim Al Khalifa
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Benoit Langlois
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Jessica Thevenard-Devy
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Stéphanie Salesse
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Katia Savary
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Christophe Schneider
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Nicolas Etique
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Stéphane Dedieu
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| | - Jérôme Devy
- Université de Reims Champagne-Ardenne (URCA), Reims, France.,CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, MEDyC, Reims, France
| |
Collapse
|
6
|
Schnieder J, Mamazhakypov A, Birnhuber A, Wilhelm J, Kwapiszewska G, Ruppert C, Markart P, Wujak L, Rubio K, Barreto G, Schaefer L, Wygrecka M. Loss of LRP1 promotes acquisition of contractile-myofibroblast phenotype and release of active TGF-β1 from ECM stores. Matrix Biol 2019; 88:69-88. [PMID: 31841706 DOI: 10.1016/j.matbio.2019.12.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 12/06/2019] [Accepted: 12/07/2019] [Indexed: 12/16/2022]
Abstract
In healing tissue, fibroblasts differentiate to α-smooth muscle actin (SMA)-expressing contractile-myofibroblasts, which pull the wound edges together ensuring proper tissue repair. Uncontrolled expansion of the myofibroblast population may, however, lead to excessive tissue scarring and finally to organ dysfunction. Here, we demonstrate that the loss of low-density lipoprotein receptor-related protein (LRP) 1 overactivates the JNK1/2-c-Jun-Fra-2 signaling pathway leading to the induction of α-SMA and periostin expression in human lung fibroblasts (hLF). These changes are accompanied by increased contractility of the cells and the integrin- and protease-dependent release of active transforming growth factor (TGF)-β1 from the extracellular matrix (ECM) stores. Liberation of active TGF-β1 from the ECM further enhances α-SMA and periostin expression thus accelerating the phenotypic switch of hLF. Global gene expression profiling of LRP1-depleted hLF revealed that the loss of LRP1 affects cytoskeleton reorganization, cell-ECM contacts, and ECM production. In line with these findings, fibrotic changes in the skin and lung of Fra-2 transgenic mice were associated with LRP1 depletion and c-Jun overexpression. Altogether, our results suggest that dysregulation of LRP1 expression in fibroblasts in healing tissue may lead to the unrestrained expansion of contractile myofibroblasts and thereby to fibrosis development. Further studies identifying molecules, which regulate LRP1 expression, may provide new therapeutic options for largely untreatable human fibrotic diseases.
Collapse
Affiliation(s)
- Jennifer Schnieder
- Departments of Biochemistry and Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Argen Mamazhakypov
- Departments of Biochemistry and Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Anna Birnhuber
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Jochen Wilhelm
- Departments of Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | | | - Clemens Ruppert
- Departments of Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Philipp Markart
- Department of Pulmonary Medicine, Fulda Hospital, University Medicine Marburg, Campus Fulda, Fulda, Germany
| | - Lukasz Wujak
- Departments of Biochemistry and Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Karla Rubio
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Guillermo Barreto
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany; Brain and Lung Epigenetics, Laboratoire Croissance, Réparation et Régénération Tissulaires (CRRET), Université Paris Est Créteil (UPEC), Créteil, France
| | - Liliana Schaefer
- Institute of Pharmacology and Toxicology, Goethe University, Frankfurt Am Main, Germany
| | - Malgorzata Wygrecka
- Departments of Biochemistry and Internal Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany.
| |
Collapse
|
7
|
Au DT, Arai AL, Fondrie WE, Muratoglu SC, Strickland DK. Role of the LDL Receptor-Related Protein 1 in Regulating Protease Activity and Signaling Pathways in the Vasculature. Curr Drug Targets 2019; 19:1276-1288. [PMID: 29749311 DOI: 10.2174/1389450119666180511162048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 04/24/2018] [Accepted: 04/24/2018] [Indexed: 12/22/2022]
Abstract
Aortic aneurysms represent a significant clinical problem as they largely go undetected until a rupture occurs. Currently, an understanding of mechanisms leading to aneurysm formation is limited. Numerous studies clearly indicate that vascular smooth muscle cells play a major role in the development and response of the vasculature to hemodynamic changes and defects in these responses can lead to aneurysm formation. The LDL receptor-related protein 1 (LRP1) is major smooth muscle cell receptor that has the capacity to mediate the endocytosis of numerous ligands and to initiate and regulate signaling pathways. Genetic evidence in humans and mouse models reveal a critical role for LRP1 in maintaining the integrity of the vasculature. Understanding the mechanisms by which this is accomplished represents an important area of research, and likely involves LRP1's ability to regulate levels of proteases known to degrade the extracellular matrix as well as its ability to modulate signaling events.
Collapse
Affiliation(s)
- Dianaly T Au
- Center for Vascular and Inflammatory Diseases, Biopark I, R213, 800 W. Baltimore Street, Baltimore, Maryland 21201, MD, United States
| | - Allison L Arai
- Center for Vascular and Inflammatory Diseases, Biopark I, R213, 800 W. Baltimore Street, Baltimore, Maryland 21201, MD, United States
| | - William E Fondrie
- Center for Vascular and Inflammatory Diseases, Biopark I, R213, 800 W. Baltimore Street, Baltimore, Maryland 21201, MD, United States
| | - Selen C Muratoglu
- Center for Vascular and Inflammatory Diseases, Biopark I, R213, 800 W. Baltimore Street, Baltimore, Maryland 21201, MD, United States.,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, MD, United States
| | - Dudley K Strickland
- Center for Vascular and Inflammatory Diseases, Biopark I, R213, 800 W. Baltimore Street, Baltimore, Maryland 21201, MD, United States.,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, MD, United States.,Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland 21201, MD, United States
| |
Collapse
|
8
|
Potere N, Del Buono MG, Mauro AG, Abbate A, Toldo S. Low Density Lipoprotein Receptor-Related Protein-1 in Cardiac Inflammation and Infarct Healing. Front Cardiovasc Med 2019; 6:51. [PMID: 31080804 PMCID: PMC6497734 DOI: 10.3389/fcvm.2019.00051] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 04/09/2019] [Indexed: 01/07/2023] Open
Abstract
Acute myocardial infarction (AMI) leads to myocardial cell death and ensuing sterile inflammatory response, which represents an attempt to clear cellular debris and promote cardiac repair. However, an overwhelming, unopposed or unresolved inflammatory response following AMI leads to further injury, worse remodeling and heart failure (HF). Additional therapies are therefore warranted to blunt the inflammatory response associated with ischemia and reperfusion and prevent long-term adverse events. Low-density lipoprotein receptor-related protein 1 (LRP1) is a ubiquitous endocytic cell surface receptor with the ability to recognize a wide range of structurally and functionally diverse ligands. LRP1 transduces multiple intracellular signal pathways regulating the inflammatory reaction, tissue remodeling and cell survival after organ injury. In preclinical studies, activation of LRP1-mediated signaling in the heart with non-selective and selective LRP1 agonists is linked with a powerful cardioprotective effect, reducing infarct size and cardiac dysfunction after AMI. The data from early phase clinical studies with plasma-derived α1-antitrypsin (AAT), an endogenous LRP1 agonist, and SP16 peptide, a synthetic LRP1 agonist, support the translational value of LRP1 as a novel therapeutic target in AMI. In this review, we will summarize the cellular and molecular bases of LRP1 functions in modulating the inflammatory reaction and the reparative process after injury in various peripheral tissues, and discuss recent evidences implicating LRP1 in myocardial inflammation and infarct healing.
Collapse
Affiliation(s)
- Nicola Potere
- VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Marco Giuseppe Del Buono
- VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, United States
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Rome, Italy
| | - Adolfo Gabriele Mauro
- VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Antonio Abbate
- VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, United States
| | - Stefano Toldo
- VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, United States
| |
Collapse
|
9
|
Yin Q, Liu H. Connective Tissue Growth Factor and Renal Fibrosis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1165:365-380. [PMID: 31399974 DOI: 10.1007/978-981-13-8871-2_17] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
CCN2, also known as connective tissue growth factor (CTGF), is one of important members of the CCN family. Generally, CTGF expresses at low levels in normal adult kidney, while increases significantly in various kidney diseases, playing an important role in the development of glomerular and tubulointerstitial fibrosis in progressive kidney diseases. CTGF is involved in cell proliferation, migration, and differentiation and can promote the progression of fibrosis directly or act as a downstream factor of transforming growth factor β (TGF-β). CTGF also regulates the expression and activity of TGF-β and bone morphogenetic protein (BMP), thereby playing an important role in the process of kidney repair. In patients with chronic kidney disease, elevated plasma CTGF is an independent risk factor for progression to end-stage renal disease and is closely related to glomerular filtration rate. Therefore, CTGF may be a potential biological marker of kidney fibrosis, but more clinical studies are needed to confirm this view. This section briefly describes the role and molecular mechanisms of CTGF in renal fibrosis and also discusses the potential value of targeting CCN2 for the treatment of renal fibrosis.
Collapse
Affiliation(s)
- Qing Yin
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, China
| | - Hong Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, China.
| |
Collapse
|
10
|
Verjans R, Peters T, Beaumont FJ, van Leeuwen R, van Herwaarden T, Verhesen W, Munts C, Bijnen M, Henkens M, Diez J, de Windt LJ, van Nieuwenhoven FA, van Bilsen M, Goumans MJ, Heymans S, González A, Schroen B. MicroRNA-221/222 Family Counteracts Myocardial Fibrosis in Pressure Overload-Induced Heart Failure. Hypertension 2017; 71:280-288. [PMID: 29255073 DOI: 10.1161/hypertensionaha.117.10094] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 08/21/2017] [Accepted: 11/29/2017] [Indexed: 02/06/2023]
Abstract
Pressure overload causes cardiac fibroblast activation and transdifferentiation, leading to increased interstitial fibrosis formation and subsequently myocardial stiffness, diastolic and systolic dysfunction, and eventually heart failure. A better understanding of the molecular mechanisms underlying pressure overload-induced cardiac remodeling and fibrosis will have implications for heart failure treatment strategies. The microRNA (miRNA)-221/222 family, consisting of miR-221-3p and miR-222-3p, is differentially regulated in mouse and human cardiac pathology and inversely associated with kidney and liver fibrosis. We investigated the role of this miRNA family during pressure overload-induced cardiac remodeling. In myocardial biopsies of patients with severe fibrosis and dilated cardiomyopathy or aortic stenosis, we found significantly lower miRNA-221/222 levels as compared to matched patients with nonsevere fibrosis. In addition, miRNA-221/222 levels in aortic stenosis patients correlated negatively with the extent of myocardial fibrosis and with left ventricular stiffness. Inhibition of both miRNAs during AngII (angiotensin II)-mediated pressure overload in mice led to increased fibrosis and aggravated left ventricular dilation and dysfunction. In rat cardiac fibroblasts, inhibition of miRNA-221/222 derepressed TGF-β (transforming growth factor-β)-mediated profibrotic SMAD2 (mothers against decapentaplegic homolog 2) signaling and downstream gene expression, whereas overexpression of both miRNAs blunted TGF-β-induced profibrotic signaling. We found that the miRNA-221/222 family may target several genes involved in TGF-β signaling, including JNK1 (c-Jun N-terminal kinase 1), TGF-β receptor 1 and TGF-β receptor 2, and ETS-1 (ETS proto-oncogene 1). Our findings show that heart failure-associated downregulation of the miRNA-221/222 family enables profibrotic signaling in the pressure-overloaded heart.
Collapse
Affiliation(s)
- Robin Verjans
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Tim Peters
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Francisco Javier Beaumont
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Rick van Leeuwen
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Tessa van Herwaarden
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Wouter Verhesen
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Chantal Munts
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Mitchell Bijnen
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Michiel Henkens
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Javier Diez
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Leon J de Windt
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Frans A van Nieuwenhoven
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Marc van Bilsen
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Marie José Goumans
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Stephane Heymans
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Arantxa González
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.)
| | - Blanche Schroen
- From the Department of Cardiology (R.V., T.P., R.v.L., W.V., M.H., L.J.d.W., S.H., B.S.), Department of Physiology (C.M., F.A.v.N., M.v.B.), and Department of Internal Medicine (M.B.), CARIM School for Cardiovascular Diseases, Maastricht University, The Netherlands; Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamplona, Spain (F.J.B., J.D., A.G.); Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain (F.J.B., J.D., A.G.); CIBERCV, Carlos III Institute of Health, Madrid, Spain (F.J.B., J.D., A.G.); Department of Molecular Cell Biology, Leiden University Medical Biology Center, The Netherlands (T.v.H., M.J.G.); Department of Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamplona, Spain (J.D.); Netherlands Heart Institute (ICIN), Utrecht; and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology (CMVB), KU Leuven, Belgium (S.H.).
| |
Collapse
|
11
|
Wujak L, Schnieder J, Schaefer L, Wygrecka M. LRP1: A chameleon receptor of lung inflammation and repair. Matrix Biol 2017; 68-69:366-381. [PMID: 29262309 DOI: 10.1016/j.matbio.2017.12.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 12/17/2022]
Abstract
The lung displays a remarkable capability to regenerate following injury. Considerable effort has been made thus far to understand the cardinal processes underpinning inflammation and reconstruction of lung tissue. However, the factors determining the resolution or persistence of inflammation and efficient wound healing or aberrant remodeling remain largely unknown. Low density lipoprotein receptor-related protein 1 (LRP1) is an endocytic/signaling cell surface receptor which controls cellular and molecular mechanisms driving the physiological and pathological inflammatory reactions and tissue remodeling in several organs. In this review, we will discuss the impact of LRP1 on the consecutive steps of the inflammatory response and its role in the balanced tissue repair and aberrant remodeling in the lung.
Collapse
Affiliation(s)
- Lukasz Wujak
- Department of Biochemistry, Justus Liebig University, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Jennifer Schnieder
- Department of Biochemistry, Justus Liebig University, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Liliana Schaefer
- Goethe University School of Medicine, University Hospital, Theodor-Stern Kai 7, 60590 Frankfurt am Main, Germany
| | - Malgorzata Wygrecka
- Department of Biochemistry, Justus Liebig University, Friedrichstrasse 24, 35392 Giessen, Germany; Member of the German Center for Lung Research (DZL), Germany.
| |
Collapse
|
12
|
Takigawa M. An early history of CCN2/CTGF research: the road to CCN2 via hcs24, ctgf, ecogenin, and regenerin. J Cell Commun Signal 2017; 12:253-264. [PMID: 29076115 DOI: 10.1007/s12079-017-0414-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 09/27/2017] [Indexed: 02/06/2023] Open
Abstract
The principal aim of this historical review is to present the processes by which the different aspects of CCN2/CTGF/Hcs24 were discovered by different groups and how much CCN2/CTGF, by being integrated into CCN family, has contributed to the establishment of the basic concepts regarding the role and functions of this new class of proteins. This review should be particularly useful to new investigators who have recently entered this exciting field of study and also provides a good opportunity to acknowledge the input of those individuals who participated in the development of this scientific field.
Collapse
Affiliation(s)
- Masaharu Takigawa
- Advanced Research Center for Oral and Craniofacial Sciences (ARCOCS), Okayama University Dental School/Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Okayama, 700-8525, Japan.
| |
Collapse
|
13
|
Purohit T, Qin Z, Quan C, Lin Z, Quan T. Smad3-dependent CCN2 mediates fibronectin expression in human skin dermal fibroblasts. PLoS One 2017; 12:e0173191. [PMID: 28267785 PMCID: PMC5340390 DOI: 10.1371/journal.pone.0173191] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 02/16/2017] [Indexed: 01/12/2023] Open
Abstract
The potential involvement of connective tissue growth factor (CCN2/CTGF) in extracellular matrix (ECM) production is recognized. However, the role CCN2 in fibronectin (FN) gene expression has remained incompletely understood and even controversial. Here we report that CCN2 is absolutely necessary for FN expression in primary human skin dermal fibroblasts, the major cells responsible for ECM production in skin. Gain- and loss-of-function approaches demonstrate that CCN2 is an essential component of FN expression in both basal and stimulation by TGF-β signaling, the major regulator of FN expression. CCN2 is significantly induced by Smad3, a critical mediator of TGF-β signaling. CCN2 acts as a downstream mediator of TGF-β/Smad signaling and acting synergistically with TGF-β to regulate FN gene expression. Finally, we observed that CCN2 and FN predominantly expressed in the dermis of normal human skin, stromal tissues of skin squamous cell carcinoma (SCC), and simultaneously induced in wounded human skin in vivo. These findings provide evidence that CCN2 is responsible for mediating the stimulatory effects of TGF-β/Smad on FN gene expression, and attenuation of CCN2 expression may benefit to reduce fibrotic ECM microenvironment in disease skin.
Collapse
Affiliation(s)
- Trupta Purohit
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Zhaoping Qin
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Chunji Quan
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji, China
| | - Zhenhua Lin
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji, China
| | - Taihao Quan
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| |
Collapse
|
14
|
Belotti D, Capelli C, Resovi A, Introna M, Taraboletti G. Thrombospondin-1 promotes mesenchymal stromal cell functions via TGFβ and in cooperation with PDGF. Matrix Biol 2016; 55:106-116. [PMID: 26992552 DOI: 10.1016/j.matbio.2016.03.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/04/2016] [Accepted: 03/07/2016] [Indexed: 10/22/2022]
Abstract
Mesenchymal stromal cells (MSC) are characterized by unique tropism for wounded tissues, high differentiating capacity, ability to induce tissue repair, and anti-inflammatory and immunoregulatory activities. This has generated interest in their therapeutic use in severe human conditions as well as in regenerative medicine and tissue engineering. Identification of factors involved in the regulation of MSC proliferation, migration and differentiation could provide insights into the pathophysiological regulation of MSC and be exploited to optimize clinical grade expansion protocols for therapeutic use. Here we identify thrombospondin-1 (TSP-1) as a major regulator of MSC. TSP-1 induced MSC proliferation. This effect was mediated by TSP-1-induced activation of endogenous TGFβ, as shown by the inhibitory effects of anti-TGFβ antibodies and by the lack of activity of TSP-2 - that does not activate TGFβ. Moreover, TSP-1 strongly potentiated the proliferative and migratory activity of PDGF on MSC. TSP-1 directly bound to PDGF, through a site located within the TSP-1 type III repeats, and protected the growth factor from degradation by MSC-derived proteases, hence increasing its stability and bioavailability. The studies presented here identify a more comprehensive picture of the pleiotropic effect of TSP-1 on MSC behavior, setting the basis for further studies aimed at investigating the possible use of PDGF and TSP-1 in the in vitro expansion of MSC for therapeutic applications.
Collapse
Affiliation(s)
- Dorina Belotti
- Tumor Angiogenesis Unit, Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - Chiara Capelli
- USS Centro di Terapia Cellulare "G. Lanzani", USC Haematology, ASST Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Andrea Resovi
- Tumor Angiogenesis Unit, Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - Martino Introna
- USS Centro di Terapia Cellulare "G. Lanzani", USC Haematology, ASST Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Giulia Taraboletti
- Tumor Angiogenesis Unit, Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy.
| |
Collapse
|
15
|
Angelini A, Li Z, Mericskay M, Decaux JF. Regulation of Connective Tissue Growth Factor and Cardiac Fibrosis by an SRF/MicroRNA-133a Axis. PLoS One 2015; 10:e0139858. [PMID: 26440278 PMCID: PMC4595333 DOI: 10.1371/journal.pone.0139858] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/16/2015] [Indexed: 01/26/2023] Open
Abstract
Myocardial fibrosis contributes to the remodeling of heart and the loss of cardiac function leading to heart failure. SRF is a transcription factor implicated in the regulation of a large variety of genes involved in cardiac structure and function. To investigate the impact of an SRF overexpression in heart, we developed a new cardiac-specific and tamoxifen-inducible SRF overexpression mouse model by the Cre/loxP strategy. Here, we report that a high level overexpression of SRF leads to severe modifications of cardiac cytoarchitecture affecting the balance between cardiomyocytes and cardiac fibroblasts and also a profound alteration of cardiac gene expression program. The drastic development of fibrosis was characterized by intense sirius red staining and associated with an increased expression of genes encoding extracellular matrix proteins such as fibronectin, procollagen type 1α1 and type 3α1 and especially connective tissue growth factor (CTGF). Furthermore miR-133a, one of the most predominant cardiac miRNAs, is strongly downregulated when SRF is overexpressed. By comparison a low level overexpression of SRF has minor impact on these different processes. Investigation with miR-133a, antimiR-133a and AdSRF-VP16 experiments in H9c2 cardiac cells demonstrated that: 1)–miR-133a acts as a repressor of SRF and CTGF expression; 2)–a simultaneous overexpression of SRF by AdSRF-VP16 and inhibition of miR-133a by a specific antimiR increase CTGF expression; 3)–miR-133a overexpression can block the upregulation of CTGF induced by AdSRF-VP16. Taken together, these findings reveal a key role of the SRF/CTGF/miR-133a axis in the regulation of cardiac fibrosis.
Collapse
Affiliation(s)
- Aude Angelini
- Biology of Adaptation and Ageing, Institut de Biologie Paris Seine (IBPS), DHU FAST Sorbonne Universités, UPMC Université Paris 06, Paris, France
- CNRS, UMR8256, Paris, France
- INSERM, U1164, Paris, France
| | - Zhenlin Li
- Biology of Adaptation and Ageing, Institut de Biologie Paris Seine (IBPS), DHU FAST Sorbonne Universités, UPMC Université Paris 06, Paris, France
- CNRS, UMR8256, Paris, France
- INSERM, U1164, Paris, France
| | - Mathias Mericskay
- Biology of Adaptation and Ageing, Institut de Biologie Paris Seine (IBPS), DHU FAST Sorbonne Universités, UPMC Université Paris 06, Paris, France
- CNRS, UMR8256, Paris, France
- INSERM, U1164, Paris, France
- * E-mail: (JD); (MM)
| | - Jean-François Decaux
- Biology of Adaptation and Ageing, Institut de Biologie Paris Seine (IBPS), DHU FAST Sorbonne Universités, UPMC Université Paris 06, Paris, France
- CNRS, UMR8256, Paris, France
- INSERM, U1164, Paris, France
- * E-mail: (JD); (MM)
| |
Collapse
|
16
|
Mendes FA, Coelho Aguiar JM, Kahn SA, Reis AH, Dubois LG, Romão LF, Ferreira LSS, Chneiweiss H, Moura Neto V, Abreu JG. Connective-Tissue Growth Factor (CTGF/CCN2) Induces Astrogenesis and Fibronectin Expression of Embryonic Neural Cells In Vitro. PLoS One 2015; 10:e0133689. [PMID: 26241738 PMCID: PMC4524627 DOI: 10.1371/journal.pone.0133689] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 07/01/2015] [Indexed: 02/06/2023] Open
Abstract
Connective-tissue growth factor (CTGF) is a modular secreted protein implicated in multiple cellular events such as chondrogenesis, skeletogenesis, angiogenesis and wound healing. CTGF contains four different structural modules. This modular organization is characteristic of members of the CCN family. The acronym was derived from the first three members discovered, cysteine-rich 61 (CYR61), CTGF and nephroblastoma overexpressed (NOV). CTGF is implicated as a mediator of important cell processes such as adhesion, migration, proliferation and differentiation. Extensive data have shown that CTGF interacts particularly with the TGFβ, WNT and MAPK signaling pathways. The capacity of CTGF to interact with different growth factors lends it an important role during early and late development, especially in the anterior region of the embryo. ctgf knockout mice have several cranio-facial defects, and the skeletal system is also greatly affected due to an impairment of the vascular-system development during chondrogenesis. This study, for the first time, indicated that CTGF is a potent inductor of gliogenesis during development. Our results showed that in vitro addition of recombinant CTGF protein to an embryonic mouse neural precursor cell culture increased the number of GFAP- and GFAP/Nestin-positive cells. Surprisingly, CTGF also increased the number of Sox2-positive cells. Moreover, this induction seemed not to involve cell proliferation. In addition, exogenous CTGF activated p44/42 but not p38 or JNK MAPK signaling, and increased the expression and deposition of the fibronectin extracellular matrix protein. Finally, CTGF was also able to induce GFAP as well as Nestin expression in a human malignant glioma stem cell line, suggesting a possible role in the differentiation process of gliomas. These results implicate ctgf as a key gene for astrogenesis during development, and suggest that its mechanism may involve activation of p44/42 MAPK signaling. Additionally, CTGF-induced differentiation of glioblastoma stem cells into a less-tumorigenic state could increase the chances of successful intervention, since differentiated cells are more vulnerable to cancer treatments.
Collapse
Affiliation(s)
- Fabio A. Mendes
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Juliana M. Coelho Aguiar
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Suzana A. Kahn
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Inserm, UMR894, Team Glial Plasticity, University Paris Descartes, Paris, France
| | - Alice H. Reis
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luiz Gustavo Dubois
- Instituto Estadual do Cérebro Paulo Niemeyer (IEC), Rio de Janeiro, RJ, Brazil
| | | | - Lais S. S. Ferreira
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Hervé Chneiweiss
- Inserm, UMR894, Team Glial Plasticity, University Paris Descartes, Paris, France
| | - Vivaldo Moura Neto
- Instituto Estadual do Cérebro Paulo Niemeyer (IEC), Rio de Janeiro, RJ, Brazil
| | - José G. Abreu
- Instituto de Ciências Biomédicas, Programa de Biologia Celular e do Desenvolvimento, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- * E-mail:
| |
Collapse
|
17
|
Revuelta-López E, Cal R, Herraiz-Martínez A, de Gonzalo-Calvo D, Nasarre L, Roura S, Gálvez-Montón C, Bayes-Genis A, Badimon L, Hove-Madsen L, Llorente-Cortés V. Hypoxia-driven sarcoplasmic/endoplasmic reticulum calcium ATPase 2 (SERCA2) downregulation depends on low-density lipoprotein receptor-related protein 1 (LRP1)-signalling in cardiomyocytes. J Mol Cell Cardiol 2015; 85:25-36. [PMID: 25968337 DOI: 10.1016/j.yjmcc.2015.04.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 04/29/2015] [Accepted: 04/30/2015] [Indexed: 01/30/2023]
Abstract
The maintenance of sarcoplasmic reticulum Ca(2+) ATPase (SERCA2) activity is crucial for cardiac function and SERCA2 is dramatically reduced in the heart exposed to hypoxic/ischemic conditions. Previous work from our group showed that hypoxia upregulates the phosphorylated form of the Ca(2+)-dependent nonreceptor protein tyrosine kinase (PTK) proline-rich tyrosine kinase 2 (pPyk2) protein levels in a low-density lipoprotein receptor-related protein (LRP1)-dependent manner. Pyk2 in turn may modulate SERCA2 in cardiomyocytes although this remains controversial. We therefore aimed to investigate the role of LRP1 on hypoxia-induced SERCA2 depletion in cardiomyocytes and to establish LRP1 signalling mechanisms involved. Western blot analysis showed that hypoxia reduced SERCA2 concomitantly with a sustained increase in LRP1 and pPyk2 protein levels in HL-1 cardiomyocytes. By impairing hypoxia-induced Pyk2 phosphorylation and HIF-1α accumulation, LRP1 deficiency prevented SERCA2 depletion and reduction of the sarcoplasmic reticulum calcium content in cardiomyocytes. Moreover, the inhibition of Pyk2 phosphorylation (with the Src-family inhibitor PP2) or the specific silencing of Pyk2 (with siRNA-anti Pyk2) preserved low HIF-1α and high SERCA2 levels in HL-1 cardiomyocytes exposed to hypoxia. We determined that the LRP1/Pyk2 axis represses SERCA2 mRNA expression via HIF-1α since HIF-1α overexpression abolished the protective effect of LRP1 deficiency on SERCA2 depletion. Our findings show a crucial role of LRP1/Pyk2/HIF-1α in hypoxia-induced cardiomyocyte SERCA2 downregulation, a pathophysiological process closely associated with heart failure.
Collapse
Affiliation(s)
| | - Roi Cal
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain
| | | | | | - Laura Nasarre
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain
| | - Santiago Roura
- ICREC Research Program, Health Science Research Institute Germans Trias i Pujol, Can Ruti Campus, Badalona, Spain
| | - Carolina Gálvez-Montón
- ICREC Research Program, Health Science Research Institute Germans Trias i Pujol, Can Ruti Campus, Badalona, Spain
| | - Antoni Bayes-Genis
- ICREC Research Program, Health Science Research Institute Germans Trias i Pujol, Can Ruti Campus, Badalona, Spain
| | - Lina Badimon
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain
| | - Leif Hove-Madsen
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain
| | | |
Collapse
|
18
|
Lin L, Hu K. LRP-1: functions, signaling and implications in kidney and other diseases. Int J Mol Sci 2014; 15:22887-901. [PMID: 25514242 PMCID: PMC4284744 DOI: 10.3390/ijms151222887] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/06/2014] [Accepted: 12/04/2014] [Indexed: 12/17/2022] Open
Abstract
Low-density lipoprotein (LDL)-related protein-1 (LRP-1) is a member of LDL receptor family that is implicated in lipoprotein metabolism and in the homeostasis of proteases and protease inhibitors. Expression of LRP-1 is ubiquitous. Up-regulation of LRP-1 has been reported in numerous human diseases. In addition to its function as a scavenger receptor for various ligands, LRP-1 has been shown to transduce multiple intracellular signal pathways including mitogen-activated protein kinase (MAPK), Akt, Rho, and the integrin signaling. LRP-1 signaling plays an important role in the regulation of diverse cellular process, such as cell proliferation, survival, motility, differentiation, and transdifferentiation, and thus participates in the pathogenesis of organ dysfunction and injury. In this review, we focus on the current understanding of LRP-1 signaling and its roles in the development and progression of kidney disease. The role and signaling of LRP-1 in the nervous and cardiovascular systems, as well as in carcinogenesis, are also briefly discussed.
Collapse
Affiliation(s)
- Ling Lin
- Division of Nephrology, Department of Medicine, College of Medicine, Penn State University, 500 University Drive, Hershey, PA 17033, USA.
| | - Kebin Hu
- Division of Nephrology, Department of Medicine, College of Medicine, Penn State University, 500 University Drive, Hershey, PA 17033, USA.
| |
Collapse
|
19
|
Murphy-Ullrich JE, Sage EH. Revisiting the matricellular concept. Matrix Biol 2014; 37:1-14. [PMID: 25064829 PMCID: PMC4379989 DOI: 10.1016/j.matbio.2014.07.005] [Citation(s) in RCA: 286] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/07/2014] [Accepted: 07/08/2014] [Indexed: 12/16/2022]
Abstract
The concept of a matricellular protein was first proposed by Paul Bornstein in the mid-1990s to account for the non-lethal phenotypes of mice with inactivated genes encoding thrombospondin-1, tenascin-C, or SPARC. It was also recognized that these extracellular matrix proteins were primarily counter or de-adhesive. This review reappraises the matricellular concept after nearly two decades of continuous investigation. The expanded matricellular family as well as the diverse and often unexpected functions, cellular location, and interacting partners/receptors of matricellular proteins are considered. Development of therapeutic strategies that target matricellular proteins are discussed in the context of pathology and regenerative medicine.
Collapse
Affiliation(s)
- Joanne E Murphy-Ullrich
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, United States.
| | | |
Collapse
|
20
|
Strickland DK, Au DT, Cunfer P, Muratoglu SC. Low-density lipoprotein receptor-related protein-1: role in the regulation of vascular integrity. Arterioscler Thromb Vasc Biol 2014; 34:487-98. [PMID: 24504736 DOI: 10.1161/atvbaha.113.301924] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Low-density lipoprotein receptor-related protein-1 (LRP1) is a large endocytic and signaling receptor that is widely expressed. In the liver, LRP1 plays an important role in regulating the plasma levels of blood coagulation factor VIII (fVIII) by mediating its uptake and subsequent degradation. fVIII is a key plasma protein that is deficient in hemophilia A and circulates in complex with von Willebrand factor. Because von Willebrand factor blocks binding of fVIII to LRP1, questions remain on the molecular mechanisms by which LRP1 removes fVIII from the circulation. LRP1 also regulates cell surface levels of tissue factor, a component of the extrinsic blood coagulation pathway. This occurs when tissue factor pathway inhibitor bridges the fVII/tissue factor complex to LRP1, resulting in rapid LRP1-mediated internalization and downregulation of coagulant activity. In the vasculature LRP1 also plays protective role from the development of aneurysms. Mice in which the lrp1 gene is selectively deleted in vascular smooth muscle cells develop a phenotype similar to the progression of aneurysm formation in human patient, revealing that these mice are ideal for investigating molecular mechanisms associated with aneurysm formation. Studies suggest that LRP1 protects against elastin fiber fragmentation by reducing excess protease activity in the vessel wall. These proteases include high-temperature requirement factor A1, matrix metalloproteinase 2, matrix metalloproteinase-9, and membrane associated type 1-matrix metalloproteinase. In addition, LRP1 regulates matrix deposition, in part, by modulating levels of connective tissue growth factor. Defining pathways modulated by LRP1 that lead to aneurysm formation and defining its role in thrombosis may allow for more effective intervention in patients.
Collapse
Affiliation(s)
- Dudley K Strickland
- From the Center for Vascular and Inflammatory Disease (D.K.S., D.T.A., P.C., S.C.M.), Departments of Surgery (D.K.S.), and Physiology (S.C.M.), University of Maryland School of Medicine, Baltimore
| | | | | | | |
Collapse
|
21
|
Revuelta-López E, Castellano J, Roura S, Gálvez-Montón C, Nasarre L, Benitez S, Bayes-Genis A, Badimon L, Llorente-Cortés V. Hypoxia Induces Metalloproteinase-9 Activation and Human Vascular Smooth Muscle Cell Migration Through Low-Density Lipoprotein Receptor–Related Protein 1–Mediated Pyk2 Phosphorylation. Arterioscler Thromb Vasc Biol 2013; 33:2877-87. [DOI: 10.1161/atvbaha.113.302323] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Elena Revuelta-López
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - José Castellano
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Santiago Roura
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Carolina Gálvez-Montón
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Laura Nasarre
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Sonia Benitez
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Antoni Bayes-Genis
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Lina Badimon
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| | - Vicenta Llorente-Cortés
- From the Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Barcelona, Spain (E.R.-L., J.C., L.N., L.B.); ICREC Research Program, Fundació Institut d´Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain (S.R., C.G.-M., A.B.-G.); and Cardiovascular Biochemistry Group, Biomedical Research Institute Sant Pau, IIB-Sant Pau, Barcelona, Spain (S.B.)
| |
Collapse
|
22
|
Sampson N, Zenzmaier C, Heitz M, Hermann M, Plas E, Schäfer G, Klocker H, Berger P. Stromal insulin-like growth factor binding protein 3 (IGFBP3) is elevated in the diseased human prostate and promotes ex vivo fibroblast-to-myofibroblast differentiation. Endocrinology 2013; 154:2586-99. [PMID: 23720424 DOI: 10.1210/en.2012-2259] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dysregulation of the IGF axis is implicated in the development of benign prostatic hyperplasia (BPH) and prostate cancer (PCa), 2 of the most common diseases affecting elderly males. PCa is the second leading cause of male-related cancer death in Western societies. Although distinct pathologies, BPH and PCa are both characterized by extensive stromal remodeling, in particular fibroblast-to-myofibroblast differentiation, thought to be induced by elevated local production of TGFβ1. We previously showed that TGFβ1-mediated fibroblast-to-myofibroblast differentiation of primary human prostatic stromal cells resulted in the dsyregulation of several components of the IGF axis, including the induction of IGF binding protein 3 (IGFBP3). Using isoform-specific lentiviral-mediated knockdown, we demonstrate herein that IGFBP3 is essential for TGFβ1-mediated differentiation. Although recombinant human IGFBP3 alone was not sufficient to induce differentiation, IGFBP3 synergistically potentiated TGFβ1-mediated stromal remodeling predominantly via an IGF-independent mechanism. Consistent with these in vitro findings, IGFBP3 immunohistochemistry revealed elevated levels of IGFBP3 in the hyperplastic fibromuscular stroma of BPH specimens and in the tumor-adjacent stroma of high-grade PCa. Collectively these data indicate that the dysregulation of the stromal IGF axis, in particular elevated IGFBP3, plays a crucial role in fibroblast-to-myofibroblast differentiation in the diseased prostatic stroma and indicate the therapeutic potential of inhibiting stromal remodeling and the resulting dysregulation of the stromal IGF axis as a novel strategy for the treatment of advanced PCa and BPH.
Collapse
|
23
|
Abstract
CCN family member 2 (CCN2), also known as connective tissue growth factor (CTGF), has been suggested to be an endochondral ossification genetic factor that has been termed “ecogenin”, because in vitro studies revealed that CCN2 promotes the proliferation and differentiation of growth-plate chondrocytes, osteoblasts, and vascular endothelial cells, all of which play important roles in endochondral ossification. In addition to its action toward these three types of cells, CCN2 was recently found to promote the formation of osteoclasts in vitro, which cells play an important role in the replacement of cartilage by bone during endochondral ossification, thus strengthening the “ecogenin” hypothesis. For confirmation of this hypothesis, transgenic mice over-expressing CCN2 in cartilage were generated. The results proved the hypothesis; i.e., the over-expression of CCN2 in cartilage stimulated the proliferation and differentiation of growth-plate chondrocytes, resulting in the promotion of endochondral ossification. In addition to its “ecogenin” action, CCN2 had earlier been shown to promote the differentiation of various cartilage cells including articular cartilage cells. In accordance with these findings, cartilage-specific overexpression of CCN2 in the transgenic mice was shown to protect against the development of osteoarthritic changes in aging articular cartilage. Thus, CCN2 may also play a role as an anti-aging (chondroprotective) factor, stabilizing articular cartilage. CCN2 also had been shown to promote intramembranous ossification, regenerate cartilage and bone, and induce angiogenesis in vivo. For understanding of the molecular mechanism underlying such multifunctional actions, yeast two-hybrid analysis, protein array analysis, solid-phase binding assay, and surface plasmon resonance (SPR) analysis have been used to search for binding partners of CCN2. ECMs such as fibronectin and aggrecan, growth factors including BMPs and FGF2 and their receptors such as FGFR1 and 2 and RANK, as well as CCN family members themselves, were shown to bind to CCN2. Regarding the interaction of CCN2 with some of them, various binding modules in the CCN2 molecule have been identified. Therefore, the numerous biological actions of CCN2 would depend on what kinds of binding partners and what levels of them are present in the microenvironment of different types of cells, as well as on the state of differentiation of these cells. Through this mechanism, CCN2 would orchestrate various signaling pathways, acting as a signal conductor to promote harmonized skeletal growth and regeneration.
Collapse
|
24
|
Yijing L, Liu H, Yuan C, Wang B, Ren M, Yan L, Wang X, Zhang J. The effects of qindan-capsule-containing serum on the TGF-β1/ERK signaling pathway, matrix metalloproteinase synthesis and cell function in adventitial fibroblasts. PHARMACEUTICAL BIOLOGY 2013; 51:712-721. [PMID: 23373709 DOI: 10.3109/13880209.2013.764328] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
CONTEXT Qindan capsule (QC), a compound used in traditional Chinese medicine, has been used as an anti-hypertensive agent in clinical settings for years. Our previous studies have shown that QC can improve the morphological index of the artery, down-regulate the collagen volume fraction in the media and inhibit the transformation of smooth muscle cells. However, the detailed mechanisms underlying its effects require further investigation, which might provide more scientific evidence for the clinical treatment of hypertensive vascular remodeling (VR). OBJECTIVE We investigated the effects of QC-containing serum on the TGF-β1/ERK signaling pathway, cell proliferation, migration, the cell cycle, apoptosis and matrix metalloproteinase synthesis (MMPs) in rat aortic adventitial fibroblasts (AFs). MATERIALS AND METHODS AFs were cultured through tissue explants in vitro. The levels of extracellular signal-regulated kinase 1/2 (ERK1/2), phospho-ERK1/2 (p-ERK1/2), connective tissue growth factor (CTGF), MMP2 and MMP9 expression were measured by western blotting and RT-PCR. The proliferation and migration of AFs were measured by MTT and transwell migration assays. Cell cycle progression and apoptosis in AFs were analyzed by flow cytometry. RESULTS The proliferation and migration rates of AFs treated with transforming growth factor β1 (TGF-β1) for 24 h were 2.4 ± 0.75 and 2.2 ± 0.06 times higher than those of untreated AFs, and increases in the expression of p-ERK1/2 (3.7 ± 0.15 times), CTGF (3.3 ± 0.24 times), MMP2 (5.7 ± 0.37 times) and MMP9 (5.4 ± 0.46 times) (p < 0.05) were observed. Treatment with QC-containing serum significantly down-regulated cell proliferation (1.9 ± 0.06 times), migration (1.6 ± 0.05 times) and the expression of p-ERK1/2 (1.3 ± 0.75 times), CTGF (1.8 ± 0.64 times), MMP2 (1.6 ± 0.65 times) and MMP9 (1.4 ± 0.46 times) (p < 0.05). We also found that QC-containing serum down-regulated the percentage of cells in the G1 phase by 1.6 ± 0.43 times and increased early-phase apoptosis by 2.3 ± 0.33 times (p < 0.05) in AFs. CONCLUSIONS QC effectively inhibits the proliferation and migration of AFs and changes cell bioactivity and MMPs, possibly through the TGF-β/ERK/CTGF signaling pathway. Our findings may provide new insights into the potential function of QC in preventing or treating hypertension.
Collapse
Affiliation(s)
- Lv Yijing
- Department of Traditional Chinese Medicine, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Huang J, Huang H, Wu M, Li J, Xie H, Zhou H, Liao E, Peng Y. Connective tissue growth factor induces osteogenic differentiation of vascular smooth muscle cells through ERK signaling. Int J Mol Med 2013; 32:423-9. [PMID: 23722620 DOI: 10.3892/ijmm.2013.1398] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 04/11/2013] [Indexed: 11/06/2022] Open
Abstract
Connective tissue growth factor (CTGF) plays an important role in the pathogenesis of atherosclerosis by promoting vascular smooth muscle cell (VSMC) growth, migration, apoptosis, adhesion and the secretion of matrix components. The osteogenic differentiation of VSMCs is essential in the development of vascular calcification. However, the role of CTGF in the transdifferentiation and calcification of VSMCs is unclear. In the present study, we examined whether CTGF stimulates VSMC transdifferentiation. Primary VSMCs were obtained from mouse thoracic aortas by enzymatic digestion and identified by immunostaining for smooth muscle specific α-actin antibody (α-SMA). VSMC calcification was induced by the addition of CTGF to the osteogenic mediaum containing 5-10% FBS in the presence of 0.25 mM ascorbic acid and 10 mM β-glycerophosphate for 14 days. Calcified cells were determined by Alizarin Red S staining. Our results revealed that CTGF induced the expression of several bone markers, including alkaline phosphatase (ALP), osteocalcin (OC), osteoprotegerin (OPG) and core-binding factor subunit α1 (Cbfα1)/runt-related transcription factor 2 (Runx2), as well as calcification. However, the inhibition of extracellular signal-regulated kinase (ERK) activity using the ERK-specific inhibitor, PD98059, blocked the induction of these proteins and VSMC calcification. Based on these data, we conclude that CTGF stimulates the transdifferentiation of VSMCs into osteoblasts and that the ERK signaling pathway appears to play a critical role in this process.
Collapse
Affiliation(s)
- Juan Huang
- Institute of Endocrinology and Metabolism, The Second Xiangya Hospital of Central South University, Changsha, Hunan, P.R. China
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Romão LF, Mendes FA, Feitosa NM, Faria JCO, Coelho-Aguiar JM, de Souza JM, Neto VM, Abreu JG. Connective tissue growth factor (CTGF/CCN2) is negatively regulated during neuron-glioblastoma interaction. PLoS One 2013; 8:e55605. [PMID: 23383241 PMCID: PMC3561339 DOI: 10.1371/journal.pone.0055605] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 01/03/2013] [Indexed: 11/18/2022] Open
Abstract
Connective-tissue growth factor (CTGF/CCN2) is a matricellular-secreted protein involved in complex processes such as wound healing, angiogenesis, fibrosis and metastasis, in the regulation of cell proliferation, migration and extracellular matrix remodeling. Glioblastoma (GBM) is the major malignant primary brain tumor and its adaptation to the central nervous system microenvironment requires the production and remodeling of the extracellular matrix. Previously, we published an in vitro approach to test if neurons can influence the expression of the GBM extracellular matrix. We demonstrated that neurons remodeled glioma cell laminin. The present study shows that neurons are also able to modulate CTGF expression in GBM. CTGF immnoreactivity and mRNA levels in GBM cells are dramatically decreased when these cells are co-cultured with neonatal neurons. As proof of particular neuron effects, neonatal neurons co-cultured onto GBM cells also inhibit the reporter luciferase activity under control of the CTGF promoter, suggesting inhibition at the transcription level. This inhibition seems to be contact-mediated, since conditioned media from embryonic or neonatal neurons do not affect CTGF expression in GBM cells. Furthermore, the inhibition of CTGF expression in GBM/neuronal co-cultures seems to affect the two main signaling pathways related to CTGF. We observed inhibition of TGFβ luciferase reporter assay; however phopho-SMAD2 levels did not change in these co-cultures. In addition levels of phospho-p44/42 MAPK were decreased in co-cultured GBM cells. Finally, in transwell migration assay, CTGF siRNA transfected GBM cells or GBM cells co-cultured with neurons showed a decrease in the migration rate compared to controls. Previous data regarding laminin and these results demonstrating that CTGF is down-regulated in GBM cells co-cultured with neonatal neurons points out an interesting view in the understanding of the tumor and cerebral microenvironment interactions and could open up new strategies as well as suggest a new target in GBM control.
Collapse
Affiliation(s)
- Luciana F. Romão
- Universidade Federal do Rio de Janeiro, Campus Macaé, Rio de Janeiro, Brazil
| | - Fabio A. Mendes
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Natalia M. Feitosa
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jane Cristina O. Faria
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Juliana M. Coelho-Aguiar
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jorge Marcondes de Souza
- Serviço de Neurocirurgia do Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro; Rio de Janeiro, Brazil
| | - Vivaldo Moura Neto
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - José Garcia Abreu
- Programa de Anatomia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
| |
Collapse
|
27
|
Mason RM. Fell-Muir lecture: Connective tissue growth factor (CCN2) -- a pernicious and pleiotropic player in the development of kidney fibrosis. Int J Exp Pathol 2012; 94:1-16. [PMID: 23110747 DOI: 10.1111/j.1365-2613.2012.00845.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 08/21/2012] [Indexed: 01/01/2023] Open
Abstract
Connective tissue growth factor (CTGF, CCN2) is a member of the CCN family of matricellular proteins. It interacts with many other proteins, including plasma membrane proteins, modulating cell function. It is expressed at low levels in normal adult kidney cells but is increased in kidney diseases, playing important roles in inflammation and in the development of glomerular and interstitial fibrosis in chronic disease. This review reports the evidence for its expression in human and animal models of chronic kidney disease and summarizes data showing that anti-CTGF therapy can successfully attenuate fibrotic changes in several such models, suggesting that therapies targeting CTGF and events downstream of it in renal cells may be useful for the treatment of human kidney fibrosis. Connective tissue growth factor stimulates the development of fibrosis in the kidney in many ways including activating cells to increase extracellular matrix synthesis, inducing cell cycle arrest and hypertrophy, and prolonging survival of activated cells. The relationship between CTGF and the pro-fibrotic factor TGFβ is examined and mechanisms by which CTGF promotes signalling by the latter are discussed. No specific cellular receptors for CTGF have been discovered but it interacts with and activates several plasma membrane proteins including low-density lipoprotein receptor-related protein (LRP)-1, LRP-6, tropomyosin-related kinase A, integrins and heparan sulphate proteoglycans. Intracellular signalling and downstream events triggered by such interactions are reviewed. Finally, the relationships between CTGF and several anti-fibrotic factors, such as bone morphogenetic factor-4 (BMP4), BMP7, hepatocyte growth factor, CCN3 and Oncostatin M, are discussed. These may determine whether injured tissue heals or progresses to fibrosis.
Collapse
Affiliation(s)
- Roger M Mason
- Renal Section, Department of Medicine, Imperial College London, London, UK.
| |
Collapse
|
28
|
Llorente-Cortes V, Barbarigo V, Badimon L. Low density lipoprotein receptor-related protein 1 modulates the proliferation and migration of human hepatic stellate cells. J Cell Physiol 2012; 227:3528-33. [PMID: 22392894 DOI: 10.1002/jcp.24080] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Human hepatic stellate cells (HHSCs) proliferation and migration play a key role in the pathogenesis of liver inflammation and fibrogenesis. Low density lipoprotein receptor-related protein (LRP1) is an endocytic receptor involved in intracellular signal transduction. The aim of this work was to analyse the role of low density lipoprotein receptor-related protein (LRP1) in HHSCs proliferation and migration and the mechanisms involved. Human LRP1 deficient-HHSCs were generated by nucleofecting the line HHSCs with siRNA anti-LRP1. HHSCs DNA synthesis was measured by [(3) H]-thymidine incorporation and cell cycle progression by flow cytometry after annexin V and iodure propidium staining. Cell migration was assessed using a wound repair model system. LRP1 expression and extracellular matrix-regulated kinase (ERK1,2) phosphorylation were analysed by Western blot analysis. Transforming growth factor-β (TGF-β) extracellular levels were analysed by ELISA. siRNA-antiLRP1 treatment almost completely inhibited LRP1 mRNA and protein expression. LRP1 deficient HHSCs showed higher proliferative response (172 ± 19 vs. 93 ± 8 [(3) H]-thymidine incorporation; 78.68% vs. 82.69% in G0/G1, 21.32% vs. 17.30% in G2/S) and higher migration rates than control HHSCs. LRP1 deficient cells showed higher levels of phosphorylated ERK1,2. TGF-β extracellular levels were threefold higher in LRP1-deficient than in control HHSCs cells. These results demonstrate that LRP1 regulates HHSCs proliferation and migration through modulation of ERK1,2 phosphorylation and TGF-β extracellular levels. These results suggest that HHSCs-LRP1 may play a key role in the modulation of factors determining hepatic fibrosis.
Collapse
Affiliation(s)
- V Llorente-Cortes
- Cardiovascular Research Center of Barcelona, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu I Sant Pau, Barcelona, Spain.
| | | | | |
Collapse
|
29
|
Cabello-Verrugio C, Morales MG, Cabrera D, Vio CP, Brandan E. Angiotensin II receptor type 1 blockade decreases CTGF/CCN2-mediated damage and fibrosis in normal and dystrophic skeletal muscles. J Cell Mol Med 2012; 16:752-64. [PMID: 21645240 PMCID: PMC3822846 DOI: 10.1111/j.1582-4934.2011.01354.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Connective tissue growth factor (CTGF/CCN-2) is mainly involved in the induction of extracellular matrix (ECM) proteins. The levels of CTGF correlate with the degree and severity of fibrosis in many tissues, including dystrophic skeletal muscle. The CTGF overexpression in tibialis anterior skeletal muscle using an adenoviral vector reproduced many of the features observed in dystrophic muscles including muscle damage and regeneration, fibrotic response and decrease in the skeletal muscle strength. The renin-angiotensin system is involved in the genesis and progression of fibrotic diseases through its main fibrotic components angiotensin-II and its transducer receptor AT-1. The use of AT-1 receptor blockers (ARB) has been shown to decrease fibrosis. In this paper, we show the effect of AT-1 receptor blockade on CTGF-dependent biological activity in skeletal muscle cells as well as the response to CTGF overexpression in normal skeletal muscle. Our results show that in myoblasts ARB decreased CTGF-mediated increase of ECM protein levels, extracellular signal regulated kinases 1/2 (ERK-1/2) phosphorylation and stress fibres formation. In tibialis anterior muscle overexpressing CTGF using an adenovirus, ARB treatment decreased CTGF-mediated increase of ECM molecules, α-SMA and ERK-1/2 phosphorylation levels. Quite remarkable, ARB was able to prevent the loss of contractile force of tibialis anterior muscles overexpressing CTGF. Finally, we show that ARB decreased the levels of fibrotic proteins, CTGF and ERK-1/2 phosphorylation augmented in a dystrophic skeletal muscle from mdx mice. We propose that ARB is a novel pharmacological tool that can be used to decrease the fibrosis induced by CTGF in skeletal muscle associated with muscular dystrophies.
Collapse
Affiliation(s)
- Claudio Cabello-Verrugio
- Laboratorio de Diferenciación Celular y Patología, Centro de Regulación Celular y Patología (CRCP), Departamento de Biología Celular y Molecular, Pontificia Universidad Católica de Chile, Santiago, Chile.
| | | | | | | | | |
Collapse
|
30
|
Hoshijima M, Hattori T, Aoyama E, Nishida T, Yamashiro T, Takigawa M. Roles of heterotypic CCN2/CTGF-CCN3/NOV and homotypic CCN2-CCN2 interactions in expression of the differentiated phenotype of chondrocytes. FEBS J 2012; 279:3584-3597. [PMID: 22812570 DOI: 10.1111/j.1742-4658.2012.08717.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
To identify proteins that regulate CCN2 activity, we carried out GAL4-based yeast two-hybrid screening with a cDNA library derived from a chondrocytic cell line, HCS-2/8. CCN2/CTGF and CCN3/NOV polypeptides were picked up as CCN2-binding proteins, and CCN2–CCN2 and CCN2–CCN3 binding domains were identified. Direct binding between CCN2 and CCN3 was confirmed by coimmunoprecipitation in vitro and in vivo and surface plasmon resonance, and the calculated dissociation constants (K(d)) were 1.17 × 10(-9) m for CCN2 and CCN2, and 1.95 × 10(-9) m for CCN2 and CCN3. Ectopically overexpressed green fluorescent protein–CCN2 and Halo–CCN3 in COS7 cells colocalized, as determined by direct fluorescence analysis. We present evidence that CCN2–CCN3 interactions modulated CCN2 activity such as enhancement of ACAN and col2a1 expression. Curiously, CCN2 enhanced, whereas CCN3 inhibited, the expression of aggrecan and col2a1 mRNA in HCS-2/8 cells, and combined treatment with CCN2 and CCN3 abolished the inhibitory effect of CCN3. These effects were neutralized with an antibody against the von Willebrand factor type C domain of CCN2 (11H3). This antibody diminished the binding between CCN2 and CCN2, but enhanced that between CCN3 and CCN2. Our results suggest that CCN2 could form homotypic and heterotypic dimers with CCN2 and CCN3, respectively. Strengthening the binding between CCN2 and CCN3 with the 11H3 antibody had an enhancing effect on aggrecan expression in chondrocytes, suggesting that CCN2 had an antagonizing effect by binding to CCN3.
Collapse
Affiliation(s)
- Mitsuhiro Hoshijima
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| | - Takako Hattori
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| | - Eriko Aoyama
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| | - Takashi Nishida
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| | - Takashi Yamashiro
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| | - Masaharu Takigawa
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan Biodental Research Center, Okayama University Dental School, Japan
| |
Collapse
|
31
|
Proulx DP, Rouleau P, Paré I, Vallières-Noël MM, Bazin R. Interaction between intravenous immunoglobulin (IVIg) and the low-density lipoprotein receptor-related protein 1: a role for transcytosis across the blood brain barrier? J Neuroimmunol 2012; 251:39-44. [PMID: 22796178 DOI: 10.1016/j.jneuroim.2012.06.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 06/19/2012] [Accepted: 06/25/2012] [Indexed: 01/28/2023]
Abstract
Intravenous immunoglobulin (IVIg) is a therapeutic preparation of plasma-derived human IgG and is increasingly used for the treatment of several neurological inflammatory disorders. However, it is not clear whether the IgG molecules contained in IVIg can actually cross the BBB in treated patients. We recently showed that LRP1, an endocytic receptor involved in transcytosis of several proteins across the BBB was able to interact with IVIg. In the present study, we show that LRP1 is involved in IVIg internalization inside living cells. Our data also suggest that following internalization, IVIg is recycled to the cell surface, raising the possibility that LRP1 can mediate IVIg transcytosis across the BBB. Finally, we show that IVIg-LRP1 interaction leads to LRP1 tyrosine phosphorylation.
Collapse
|
32
|
Novel aspects of the apolipoprotein-E receptor family: regulation and functional role of their proteolytic processing. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11515-011-1186-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
33
|
Juric V, Chen CC, Lau LF. TNFα-induced apoptosis enabled by CCN1/CYR61: pathways of reactive oxygen species generation and cytochrome c release. PLoS One 2012; 7:e31303. [PMID: 22363611 PMCID: PMC3281933 DOI: 10.1371/journal.pone.0031303] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 01/06/2012] [Indexed: 12/20/2022] Open
Abstract
Although TNFα is a strong inducer of apoptosis, its cytotoxicity in most normal cells in vitro requires blockade of NFκB signaling or inhibition of de novo protein synthesis, typically by the addition of cycloheximide. However, several members of CCN (CYR61/CTGF/NOV) family of extracellular matrix proteins enable TNFα-dependent apoptosis in vitro without inhibiting NFκB or de novo protein synthesis, and CCN1 (CYR61) is essential for optimal TNFα cytotoxicity in vivo. Previous studies showed that CCN1 unmasks the cytotoxicity of TNFα by binding integrins α(v)β(5), α(6)β(1), and the cell surface heparan sulfate proteoglycan syndecan 4 to induce the accumulation of a high level of reactive oxygen species (ROS), leading to a biphasic activation of JNK necessary for apoptosis. Here we show for the first time that CCN1 interacts with the low density lipoprotein receptor-related protein 1 (LRP1) in a protein complex, and that binding to LRP1 is critical for CCN1-induced ROS generation and apoptotic synergism with TNFα. We also found that neutral sphingomyelinase 1 (nSMase1), which contributes to CCN1-induced ROS generation, is required for CCN1/TNFα-induced apoptosis. Furthermore, CCN1 promotes the activation of p53 and p38 MAPK, which mediate enhanced cytochrome c release to amplify the cytotoxicity of TNFα. By contrast, LRP1, nSMase1, p53, and p38 MAPK are not required when TNFα-dependent apoptosis is facilitated by the presence of cycloheximide, indicating that they function in the CCN1 signaling pathway that converges with TNFα-induced signaling events. Since CCN1/CYR61 is a physiological regulator of TNFα cytotoxicity at least in some contexts, these findings may reveal important mediators of TNFα-induced apoptosis in vivo and identify potential therapeutic targets for thwarting TNFα-dependent tissue damage.
Collapse
Affiliation(s)
- Vladislava Juric
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Chih-Chiun Chen
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Lester F. Lau
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, Illinois, United States of America
- * E-mail:
| |
Collapse
|
34
|
Arnott JA, Lambi AG, Mundy C, Hendesi H, Pixley RA, Owen TA, Safadi FF, Popoff SN. The role of connective tissue growth factor (CTGF/CCN2) in skeletogenesis. Crit Rev Eukaryot Gene Expr 2012; 21:43-69. [PMID: 21967332 DOI: 10.1615/critreveukargeneexpr.v21.i1.40] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Connective tissue growth factor (CTGF) is a 38 kDa, cysteine rich, extracellular matrix protein composed of 4 domains or modules. CTGF has been shown to regulate a diverse array of cellular functions and has been implicated in more complex biological processes such as angiogenesis, chondrogenesis, and osteogenesis. A role for CTGF in the development and maintenance of skeletal tissues first came to light in studies demonstrating its expression in cartilage and bone cells, which was dramatically increased during skeletal repair or regeneration. The physiological significance of CTGF in skeletogenesis was confirmed in CTGF-null mice, which exhibited multiple skeletal dysmorphisms as a result of impaired growth plate chondrogenesis, angiogenesis, and bone formation/mineralization. Given the emerging importance of CTGF in osteogenesis and chondrogenesis, this review will focus on its expression in skeletal tissues, its effects on osteoblast and chondrocyte differentiation and function, and the skeletal implications of ablation or over-expression of CTGF in knockout or transgenic mouse models, respectively. In addition, this review will examine the role of integrin-mediated signaling and the regulation of CTGF expression as it relates to skeletogenesis. We will emphasize CTGF studies in bone or bone cells, and will identify opportunities for future investigations concerning CTGF and chondrogenesis/osteogenesis.
Collapse
Affiliation(s)
- John A Arnott
- Basic Sciences Department, The Commonwealth Medical College, Scranton, PA, USA
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Kawata K, Kubota S, Eguchi T, Aoyama E, Moritani NH, Kondo S, Nishida T, Takigawa M. Role of low-density lipoprotein receptor related protein 1 (LRP1) in CCN2/connective tissue growth factor (CTGF) protein transport in chondrocytes. J Cell Sci 2012; 125:2965-72. [DOI: 10.1242/jcs.101956] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
LRP1 is known to be a receptor for signal transmission and endocytosis. We formerly reported that LRP1 regulates WNT/β-catenin and protein kinase C signaling in chondrocytes and represses the hypertrophy of chondrocytes during endochondral ossification, and that LRP1 is co-localized with a ligand, CCN2, which conducts endochondral ossification, on chondrocytes. However, the role of LRP1 in endocytotic transport of CCN2 in chondrocytes is not yet understood. In the present study, we investigated the interaction between LRP1 and CCN2 during endocytotic trafficking.
RNAi-mediated knockdown of LRP1 in chondrocytic HCS-2/8 cells showed that the amount of exogenous CCN2 binding/incorporation was decreased in the LRP1 down-regulated cells. Importantly, we observed that CCN2 internalization in chondrocytes was dependent on clathrin and internalizated CCN2 was co-localized with an early or recycling endosome marker. Transcytosis of CCN2 through HCS-2/8 cells was confirmed by performing experiments with a trans-well apparatus, and the amount of transcytosed CCN2 was decreased by an LRP1 antagonist. These findings rule out possible leakage and confirm the critical involvement of LRP1 during experimental transcytosis. Moreover, under the hypoxic condition mimicking the cartilaginous microenvironment, the production level of LRP1 and the amount of transcytosed CCN2 were increased, which increases were neutralized by the LRP1 antagonist. The distribution of LRP1 and its antagonist in the growth plate in vivo was consistent with that of CCN2 therein, which was produced by and transported from the chondrocytes in the prehypertrophic layer.
These findings suggest that LRP1 mediates the transcytosis of CCN2, which may be a critical event that determines the distribution of CCN2 in cartilage.
Collapse
|
36
|
Cathepsin D is partly endocytosed by the LRP1 receptor and inhibits LRP1-regulated intramembrane proteolysis. Oncogene 2011; 31:3202-12. [PMID: 22081071 DOI: 10.1038/onc.2011.501] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The aspartic protease cathepsin-D (cath-D) is a marker of poor prognosis in breast cancer that is overexpressed and hypersecreted by human breast cancer cells. Secreted pro-cath-D binds to the extracellular domain of the β-chain of the LDL receptor-related protein-1 (LRP1) in fibroblasts. The LRP1 receptor has an 85-kDa transmembrane β-chain and a noncovalently attached 515-kDa extracellular α-chain. LRP1 acts by (1) internalizing many ligands via its α-chain, (2) activating signaling pathways by phosphorylating the LRP1β-chain tyrosine and (3) modulating gene transcription by regulated intramembrane proteolysis (RIP) of its β-chain. LRP1 RIP involves two cleavages: the first liberates the LRP1 ectodomain to give a membrane-associated form, LRP1β-CTF, and the second generates the LRP1β-intracellular domain, LRP1β-ICD, that modulates gene transcription. Here, we investigated the endocytosis of pro-cath-D by LRP1 and the effect of pro-cath-D/LRP1β interaction on LRP1β tyrosine phosphorylation and/or LRP1β RIP. Our results indicate that pro-cath-D was partially endocytosed by LRP1 in fibroblasts. However, pro-cath-D and ectopic cath-D did not stimulate phosphorylation of the LRP1β-chain tyrosine. Interestingly, ectopic cath-D and its catalytically inactive (D231N)cath-D, and pro-(D231N)cath-D all significantly inhibited LRP1 RIP by preventing LRP1β-CTF production. Thus, cath-D inhibits LRP1 RIP independently of its catalytic activity by blocking the first cleavage. As cath-D triggers fibroblast outgrowth by LRP1, we propose that cath-D modulates the growth of fibroblasts by inhibiting LRP1 RIP in the breast tumor microenvironment.
Collapse
|
37
|
Yuan Q, Wang R, Peng Y, Fu X, Wang W, Wang L, Zhang F, Peng Z, Ning W, Hu G, Wang Z, Tao L. Fluorofenidone attenuates tubulointerstitial fibrosis by inhibiting TGF-β(1)-induced fibroblast activation. Am J Nephrol 2011; 34:181-94. [PMID: 21791914 DOI: 10.1159/000329080] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 04/30/2011] [Indexed: 12/28/2022]
Abstract
BACKGROUND Novel therapeutic agents are urgently needed to combat renal fibrosis. The purpose of this study was to assess, using complete unilateral ureteral obstruction (UUO) in rats, whether fluorofenidone (AKF-PD) [1-(3-fluorophenyl)-5-methyl-2-(1H)-pyridone] inhibits renal fibrosis, and to determine whether it exerts its inhibitory function on renal fibroblast activation. METHODS Sprague-Dawley rats were randomly divided into 3 groups: sham operation, UUO and UUO/AKF-PD (500 mg/kg/day). Renal function, tubulointerstitium damage index score, extracellular matrix (ECM) deposition, and the expressions of TGF-β(1), collagen III, α-SMA, p-Smad2, p-Smad3, p-ERK1/2, p-JNK and p-p38 were measured. In addition, the expressions of α-SMA, fibronectin, CTGF, p-Smad2/3, p-ERK1/2, p-p38 and p-JNK were measured in TGF-β(1)-stimulated normal rat renal fibroblasts (NRK-49F). RESULTS AKF-PD treatment significantly attenuated tubulointerstitium damage, ECM deposition, the expressions of TGF-β(1), collagen III, α-SMA, p-ERK1/2, p-p38 and p-JNK in vivo. In vitro, AKF-PD dose-dependently inhibited expressions of α-SMA, fibronectin and CTGF. Furthermore, AKF-PD did not inhibit Smad2/3 phosphorylation or nuclear accumulation, but rather attenuated ERK, p38 and JNK activation. CONCLUSION AKF-PD treatment inhibits the progression of renal interstitial fibrosis in obstructed kidneys; this is potentially achieved by suppressing fibroblast activation. Therefore, AKF-PD is a special candidate for the treatment of renal fibrosis.
Collapse
Affiliation(s)
- Qiongjing Yuan
- Division of Nephrology, Xiangya Hospital, Central South University, Changsha, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Alapati D, Rong M, Chen S, Hehre D, Rodriguez MM, Lipson KE, Wu S. Connective tissue growth factor antibody therapy attenuates hyperoxia-induced lung injury in neonatal rats. Am J Respir Cell Mol Biol 2011; 45:1169-77. [PMID: 21659659 DOI: 10.1165/rcmb.2011-0023oc] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Despite recent advances in neonatal intensive care and surfactant therapy, bronchopulmonary dysplasia (BPD) continues to be one of the most common long-term pulmonary complications associated with preterm birth. Clinical efforts to prevent and treat BPD have been largely unsuccessful due to its multifactorial nature and poorly understood disease process. Connective tissue growth factor (CTGF) is a matricellular protein that plays an important role in tissue development and remodeling. Previous studies have demonstrated that hyperoxia exposure up-regulates CTGF expression in neonatal rat lungs. Whether CTGF overexpression plays a role in the pathogenesis of BPD, and whether CTGF antagonism has a therapeutic potential for BPD, are unknown. In the present study, we examined CTGF expression in lung autopsy specimens from patients with BPD and control subjects with no BPD. We assessed the effect of a CTGF-neutralizing monoclonal antibody (CTGF Ab) on preventing hyperoxia-induced lung injury in neonatal rats. Our study demonstrates that CTGF expression is increased in BPD lungs. In newborn rats, exposure to 90% oxygen for 14 days resulted in activation of β-catenin signaling, decreased alveolarization and vascular development, and physiological and histological evidence of pulmonary hypertension (PH). However, treatment with CTGF Ab prevented β-catenin signaling activation, improved alveolarization and vascular development, and attenuated PH during hyperoxia. These data indicate that CTGF-β-catenin signaling plays a critical role in the pathogenesis of experimental BPD. CTGF antagonism may offer a novel therapeutic strategy to alleviate BPD and PH in neonates.
Collapse
Affiliation(s)
- Deepthi Alapati
- Department of Pediatrics, Division of Neonatology, Batchelor Children’s Research Institute, Miami, FL, USA
| | | | | | | | | | | | | |
Collapse
|
39
|
Shi Y, Yamauchi T, Gaultier A, Takimoto S, Campana WM, Gonias SL. Regulation of cytokine expression by Schwann cells in response to α2-macroglobulin binding to LRP1. J Neurosci Res 2011; 89:544-51. [PMID: 21290408 DOI: 10.1002/jnr.22576] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 10/18/2010] [Accepted: 11/04/2010] [Indexed: 11/08/2022]
Abstract
Binding of activated α(2)-macroglobulin (α(2)M) to LDL receptor-related protein-1 (LRP1) in Schwann cells activates ERK/MAP kinase and Akt and thereby promotes cell survival and migration. The goal of this study was to determine whether α(2)M binding to LRP1 regulates expression of cytokines and chemokines. To assess the LRP1 response selectively, we studied primary cultures of rat Schwann cells. In a screening assay that detects 84 gene products, monocyte chemoattractant protein-1 (MCP-1/CCL2) mRNA expression was increased more than 13-fold in Schwann cells treated with activated α(2)M. The effects of α(2)M on MCP-1 expression were selective, because expression of the general proinflammatory cytokine tumor necrosis factor-α (TNF-α) was not induced. We confirmed that α(2)M selectively induces expression of MCP-1 and not TNF-α in single-target qPCR assays. MCP-1 protein accumulated at increased levels in conditioned medium of α(2)M-treated cells. LRP1 was necessary for induction of MCP-1 expression, as determined in experiments with the LRP1 antagonist receptor-associated protein, a mutated form of full-length α(2)M that does not bind LRP1, and in studies with Schwann cells in which LRP1 was silenced. Inhibiting ERK/MAP kinase activation blocked expression of MCP-1. These studies support a model in which LRP1 regulates multiple aspects of Schwann cell physiology in the response to PNS injury.
Collapse
Affiliation(s)
- Yang Shi
- Department of Pathology, UCSD School of Medicine, La Jolla, California 92093, USA
| | | | | | | | | | | |
Collapse
|
40
|
Chen S, Rong M, Platteau A, Hehre D, Smith H, Ruiz P, Whitsett J, Bancalari E, Wu S. CTGF disrupts alveolarization and induces pulmonary hypertension in neonatal mice: implication in the pathogenesis of severe bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2011; 300:L330-40. [PMID: 21239535 DOI: 10.1152/ajplung.00270.2010] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The pathological hallmarks of bronchopulmonary dysplasia (BPD), one of the most common long-term pulmonary complications associated with preterm birth, include arrested alveolarization, abnormal vascular growth, and variable interstitial fibrosis. Severe BPD is often complicated by pulmonary hypertension characterized by excessive pulmonary vascular remodeling and right ventricular hypertrophy that significantly contributes to the mortality and morbidity of these infants. Connective tissue growth factor (CTGF) is a multifunctional protein that coordinates complex biological processes during tissue development and remodeling. We have previously shown that conditional overexpression of CTGF in airway epithelium under the control of the Clara cell secretory protein promoter results in BPD-like architecture in neonatal mice. In this study, we have generated a doxycycline-inducible double transgenic mouse model with overexpression of CTGF in alveolar type II epithelial (AT II) cells under the control of the surfactant protein C promoter. Overexpression of CTGF in neonatal mice caused dramatic macrophage and neutrophil infiltration in alveolar air spaces and perivascular regions. Overexpression of CTGF also significantly decreased alveolarization and vascular development. Furthermore, overexpression of CTGF induced pulmonary vascular remodeling and pulmonary hypertension. Most importantly, we have also demonstrated that these pathological changes are associated with activation of integrin-linked kinase (ILK)/glucose synthesis kinase-3β (GSK-3β)/β-catenin signaling. These data indicate that overexpression of CTGF in AT II cells results in lung pathology similar to those observed in infants with severe BPD and that ILK/GSK-3β/β-catenin signaling may play an important role in the pathogenesis of severe BPD.
Collapse
Affiliation(s)
- Shaoyi Chen
- Department of Pediatrics, Division of Neonatology, Univ. of Miami Miller School of Medicine, FL 33101, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Csepeggi C, Jiang M, Kojima F, Crofford LJ, Frolov A. Somatic cell plasticity and Niemann-Pick type C2 protein: fibroblast activation. J Biol Chem 2010; 286:2078-87. [PMID: 21084287 DOI: 10.1074/jbc.m110.135897] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
A growing body of evidence points toward activated fibroblasts, also known as myofibroblasts, as one of the leading mediators in several major human pathologies including proliferative fibrotic disorders, invasive tumor growth, rheumatoid arthritis, and atherosclerosis. Niemann-Pick Type C2 (NPC2) protein has been recently identified as a product of the second gene in NPC disease. It encodes ubiquitous, highly conserved, secretory protein with the poorly defined function. Here we show that NPC2 deficiency in human fibroblasts confers their activation. The activation phenomenon was not limited to fibroblasts as it was also observed in aortic smooth muscle cells upon silencing NPC2 gene by siRNA. More importantly, activated synovial fibroblasts isolated from patients with rheumatoid arthritis were also identified as NPC2-deficient at both the NPC2 mRNA and protein levels. The molecular mechanism responsible for activation of NPC2-null cells was shown to be a sustained phosphorylation of ERK 1/2 mitogen-activated protein kinase (MAPK), which fulfills both the sufficient and necessary fibroblast activation criteria. All of these findings highlight a novel mechanism where NPC2 by negatively regulating ERK 1/2 MAPK phosphorylation may efficiently suppress development of maladaptive tissue remodeling and inflammation.
Collapse
Affiliation(s)
- Chad Csepeggi
- Division of Cardiovascular Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | | | | | | | | |
Collapse
|
42
|
Beaujouin M, Prébois C, Derocq D, Laurent-Matha V, Masson O, Pattingre S, Coopman P, Bettache N, Grossfield J, Hollingsworth RE, Zhang H, Yao Z, Hyman BT, van der Geer P, Smith GK, Liaudet-Coopman E. Pro-cathepsin D interacts with the extracellular domain of the beta chain of LRP1 and promotes LRP1-dependent fibroblast outgrowth. J Cell Sci 2010; 123:3336-46. [PMID: 20826454 DOI: 10.1242/jcs.070938] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Interactions between cancer cells and fibroblasts are crucial in cancer progression. We have previously shown that the aspartic protease cathepsin D (cath-D), a marker of poor prognosis in breast cancer that is overexpressed and highly secreted by breast cancer cells, triggers mouse embryonic fibroblast outgrowth via a paracrine loop. Here, we show the requirement of secreted cath-D for human mammary fibroblast outgrowth using a three-dimensional co-culture assay with breast cancer cells that do or do not secrete pro-cath-D. Interestingly, proteolytically-inactive pro-cath-D remains mitogenic, indicating a mechanism involving protein-protein interaction. We identify the low-density lipoprotein (LDL) receptor-related protein-1, LRP1, as a novel binding partner for pro-cath-D in fibroblasts. Pro-cath-D binds to residues 349-394 of the β chain of LRP1, and is the first ligand of the extracellular domain of LRP1β to be identified. We show that pro-cath-D interacts with LRP1β in cellulo. Interaction occurs at the cell surface, and overexpressed LRP1β directs pro-cath-D to the lipid rafts. Our results reveal that the ability of secreted pro-cath-D to promote human mammary fibroblast outgrowth depends on LRP1 expression, suggesting that pro-cath-D-LRP1β interaction plays a functional role in the outgrowth of fibroblasts. Overall, our findings strongly suggest that pro-cath-D secreted by epithelial cancer cells promotes fibroblast outgrowth in a paracrine LRP1-dependent manner in the breast tumor microenvironment.
Collapse
Affiliation(s)
- Mélanie Beaujouin
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Ito Y, Goldschmeding R, Kasuga H, Claessen N, Nakayama M, Yuzawa Y, Sawai A, Matsuo S, Weening JJ, Aten J. Expression patterns of connective tissue growth factor and of TGF-beta isoforms during glomerular injury recapitulate glomerulogenesis. Am J Physiol Renal Physiol 2010; 299:F545-58. [PMID: 20576680 DOI: 10.1152/ajprenal.00120.2009] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Transforming growth factor (TGF)-beta(1), -beta(2), and -beta(3) are involved in control of wound repair and development of fibrosis. Connective tissue growth factor (CTGF) expression is stimulated by all TGF-beta isoforms and is abundant in glomerulosclerosis and other fibrotic disorders. CTGF is hypothesized to mediate profibrotic effects of TGF-beta(1) or to facilitate interaction of TGF-beta(1) with its receptor, but its interactions with TGF-beta isoforms in nonpathological conditions are unexplored so far. Tissue repair and remodeling may recapitulate gene transcription at play in organogenesis. To further delineate the relationship between CTGF and TGF-beta, we compared expression patterns of CTGF and TGF-beta isoforms in rat and human glomerulogenesis and in various human glomerulopathies. CTGF mRNA was present in the immediate precursors of glomerular visceral and parietal epithelial cells in the comma- and S-shaped stages, but not in earlier stages of nephron development. During the capillary loop and maturing glomerular stages and simultaneous with the presence of TGF-beta(1), -beta(2), and -beta(3) protein, CTGF mRNA expression was maximal and present only in differentiating glomerular epithelial cells. CTGF protein was also present on precursors of mesangium and glomerular endothelium, suggesting possible paracrine interaction. Concomitant with the presence of TGF-beta(2) and -beta(3) protein, and in the absence of TGF-beta(1), CTGF mRNA and protein expression was restricted to podocytes in normal adult glomeruli. However, TGF-beta(1) and CTGF were again coexpressed, often with TGF-beta(2) and -beta(3), in particular in podocytes in proliferative glomerulonephritis and also in mesangial cells in diabetic nephropathy and IgA nephropathy (IgA NP). Coordinated expression of TGF-beta isoforms and of CTGF may be involved in normal glomerulogenesis and possibly in maintenance of glomerular structure and function at adult age. Prolonged overexpression of TGF-beta(1) and CTGF is associated with development of severe glomerulonephritis and glomerulosclerosis.
Collapse
Affiliation(s)
- Yasuhiko Ito
- Department of Pathology, Academic Medical Center, University of Amsterdam, The Netherlands
| | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Kawata K, Kubota S, Eguchi T, Moritani NH, Shimo T, Kondo S, Nishida T, Minagi S, Takigawa M. Role of the low-density lipoprotein receptor-related protein-1 in regulation of chondrocyte differentiation. J Cell Physiol 2010; 222:138-48. [DOI: 10.1002/jcp.21930] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
45
|
Stephens EH, Huynh TN, Cieluch JD, Grande-Allen KJ. Fibronectin-based isolation of valve interstitial cell subpopulations: relevance to valve disease. J Biomed Mater Res A 2010; 92:340-9. [PMID: 19189392 PMCID: PMC4396829 DOI: 10.1002/jbm.a.32382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Myxomatous mitral valves (MVs) contain elevated proportions of unique cell populations such as myofibroblasts. Without a reliable technique to isolate such cell populations, however, it has been difficult to study the role of these cells. The goal of this study was to use fibronectin (FN) to isolate distinct cell subpopulations from normal porcine MVs. Cells from porcine posterior MV leaflets were separated based on time-dependent adhesion to either tissue culture plastic (TCP) flasks or FN-coated flasks. The resultant "FAST" and "SLOW" adhering subpopulations from each technique were phenotyped using flow cytometry and immunocytochemistry to detect expression of myofibroblast markers, enzymes for collagen synthesis, and MAP kinases. Compared with FN SLOW, FN FAST showed significantly higher expression of prolyl 4-hydroxylase, heat shock protein-47 (HSP47), smooth muscle alpha-actin (SMalphaA), nonmuscle myosin (Smem), extracellular-related signaling kinase (ERK) 1, ERK2, and phosphorylated-ERK. In contrast, TCP FAST showed higher expression of only HSP47, SMalphaA, and Smem compared with TCP SLOW. In conclusion, differential adhesion to FN successfully separated a myofibroblast-like subpopulation from the posterior leaflet of the MV. This subpopulation may be useful in studying myxomatous MV disease, although additional studies remain to verify that this myofibroblast-like population resembles that observed in myxomatous MV disease.
Collapse
Affiliation(s)
| | - Thanh N. Huynh
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, 55455
| | | | | |
Collapse
|
46
|
Reduced expression of connective tissue growth factor (CTGF/CCN2) mediates collagen loss in chronologically aged human skin. J Invest Dermatol 2009; 130:415-24. [PMID: 19641518 DOI: 10.1038/jid.2009.224] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Reduced production of type I procollagen is a prominent feature of chronologically aged human skin. Connective tissue growth factor (CTGF/CCN2), a downstream target of the transforming growth factor-beta (TGF-beta)/Smad pathway, is highly expressed in numerous fibrotic disorders, in which it is believed to stimulate excessive collagen production. CTGF is constitutively expressed in normal human dermis in vivo, suggesting that CTGF is a physiological regulator of collagen expression. We report here that the TGF-beta/Smad/CTGF axis is significantly reduced in dermal fibroblasts, the major collagen-producing cells, in aged (> or = 80 years) human skin in vivo. In primary human skin fibroblasts, neutralization of endogenous TGF-beta or knockdown of CTGF substantially reduced the expression of type I procollagen mRNA, protein, and promoter activity. In contrast, overexpression of CTGF stimulated type I procollagen expression, and increased promoter activity. Inhibition of TGF-beta receptor kinase, knockdown of Smad4, or overexpression of inhibitory Smad7 abolished CTGF stimulation of type I procollagen expression. However, CTGF did not stimulate Smad3 phosphorylation or Smad3-dependent transcriptional activity. These data indicate that in human skin fibroblasts, type I procollagen expression is dependent on endogenous production of both TGF-beta and CTGF, which act through interdependent yet distinct mechanisms. Downregulation of the TGF-beta/Smad/CTGF axis likely mediates reduced type I procollagen expression in aged human skin in vivo.
Collapse
|
47
|
Cheng J, Zhou W, Warner GM, Knudsen BE, Garovic VD, Gray CE, Lerman LO, Platt JL, Romero JC, Textor SC, Nath KA, Grande JP. Temporal analysis of signaling pathways activated in a murine model of two-kidney, one-clip hypertension. Am J Physiol Renal Physiol 2009; 297:F1055-68. [PMID: 19625373 DOI: 10.1152/ajprenal.90439.2008] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Unilateral renal artery stenosis (RAS) leads to atrophy of the stenotic kidney and compensatory enlargement of the contralateral kidney. Although the two-kidney, one-clip (2K1C) model has been extensively used to model human RAS, the cellular responses in the stenotic and contralateral kidneys, particularly in the murine model, have received relatively little attention. We studied mice 2, 5, and 11 wk after unilateral RAS. These mice became hypertensive within 1 wk. The contralateral kidney increased in size within 2 wk after surgery. This enlargement was associated with a transient increase in expression of phospho-extracellular signal-regulated kinase (p-ERK), the proliferation markers proliferating cell nuclear antigen and Ki-67, the cell cycle inhibitors p21 and p27, and transforming growth factor-beta, with return to baseline levels by 11 wk. The size of the stenotic kidney was unchanged at 2 wk but progressively decreased between 5 and 11 wk. Unlike the contralateral kidney, which showed minimal histopathological alterations, the stenotic kidney developed progressive interstitial fibrosis, tubular atrophy, and interstitial inflammation. Surprisingly, the stenotic kidney showed a proliferative response, which involved largely tubular epithelial cells. The atrophic kidney had little evidence of apoptosis, despite persistent upregulation of p53; expression of cell cycle regulatory proteins in the stenotic kidney was persistently increased through 11 wk. These studies indicate that in the 2K1C model, the stenotic kidney and contralateral, enlarged kidney exhibit a distinct temporal expression of proteins involved in cell growth, cell survival, apoptosis, inflammation, and fibrosis. Notably, an unexpected proliferative response occurs in the stenotic kidney that undergoes atrophy.
Collapse
Affiliation(s)
- Jingfei Cheng
- Department of Experimental Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
N-terminal domains of CCN family 2/connective tissue growth factor bind to aggrecan. Biochem J 2009; 420:413-20. [PMID: 19298220 DOI: 10.1042/bj20081991] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
CCN2/CTGF (CCN family 2/connective tissue growth factor) is a multi-cellular protein with a broad range of activities. It modulates many cellular functions, including proliferation, migration, adhesion and extracellular matrix production, and it is thus involved in many biological and pathological processes. In particular, CCN2/CTGF is essential for normal skeletal development. To identify CCN2/CTGF-interactive proteins capable of modulating its action in cartilage, we carried out a yeast two-hybrid screening using CCN2/CTGF peptide as a bait and a cDNA library from a chondrocytic cell line, HCS-2/8. In the present paper, we report the identification of aggrecan, which is a major proteoglycan of the extracellular matrix in cartilage, as a CCN2/CTGF-binding protein. Among the four domains of CCN2/CTGF, the IGFBP [IGF (insulin-like growth factor)-binding protein-like] and/or VWC (von Willebrand factor type C) domains had a direct interaction with aggrecan in a yeast two-hybrid assay. The results of a solid-phase-binding assay using aggrecan-coated plates also showed binding to recombinant CCN2/CTGF in a dose-dependent manner. rIGFBP (recombinant IGFBP) and rVWC (recombinant VWC) module peptides had stronger binding to aggrecan compared with rTSP1 (recombinant thrombospondin type 1 repeat) and rCT (recombinant C-terminal cystine knot) module peptides. SPR (surface plasmon resonance) analysis showed the direct interaction between the CCN2/CTGF and aggrecan, and ectopically overexpressed CCN2/CTGF and AgG3 (G3 domain of aggrecan) confirmed their binding In vivo. Indirect immunofluorescence analysis indicated that CCN2/CTGF was extracellularly co-localized with aggrecan on HCS-2/8 cells. The rIGFBP-rVWC peptide effectively enhanced the production and release of aggrecan compared with the rTSP-rCT peptide in chondrocytes. These results indicate that CCN2/CTGF binds to aggrecan through its N-terminal IGFBP and VWC modules, and this binding may be related to the CCN2/CTGF-enhanced production and secretion of aggrecan by chondrocytes.
Collapse
|
49
|
Daniels A, van Bilsen M, Goldschmeding R, van der Vusse GJ, van Nieuwenhoven FA. Connective tissue growth factor and cardiac fibrosis. Acta Physiol (Oxf) 2009; 195:321-38. [PMID: 19040711 DOI: 10.1111/j.1748-1716.2008.01936.x] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cardiac fibrosis is a major pathogenic factor in a variety of cardiovascular diseases and refers to an excessive deposition of extracellular matrix components in the heart, which leads to cardiac dysfunction and eventually overt heart failure. Evidence is accumulating for a crucial role of connective tissue growth factor (CTGF) in fibrotic processes in several tissues including the heart. CTGF orchestrates the actions of important local factors evoking cardiac fibrosis. The central role of CTGF as a matricellular protein modulating the fibrotic process in cardiac remodelling makes it a possible biomarker for cardiac fibrosis and a potential candidate for therapeutic intervention to mitigate fibrosis in the heart.
Collapse
Affiliation(s)
- A Daniels
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | | | | | | | | |
Collapse
|
50
|
Langlois B, Emonard H, Martiny L, Dedieu S. [Multiple involvements of LRP-1 receptor in tumor progression]. ACTA ACUST UNITED AC 2009; 57:548-54. [PMID: 19233571 DOI: 10.1016/j.patbio.2008.07.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Accepted: 07/03/2008] [Indexed: 11/25/2022]
Abstract
Extensive proteolytic remodeling processes constitute a critical step during tumor progression. The endocytic receptor low-density lipoprotein receptor-related protein-1 (LRP-1), by its function in the clearance of multiple extracellular proteases involved in metastatic spreading, has long been considered as a putative tumor suppressor. Moreover, the receptor is likely to control the peritumoral microenvironment by internalization of growth factors and matricial proteins and could therefore participate to the control of signaling events involved in survival and proliferation of cancer cells. Nevertheless, recent data lead to reconsider the initially attributed antitumor properties of LRP-1. A more complex model seems to emerge in which LRP-1 could constitute a sensor of pericellular environment and regulate the membrane proteome dynamics. By its control of focal adhesions composition and turn-over, regulation of the cytoskeleton organization and integrin endocytic recycling, LRP-1 appears as a crucial actor of the epithelial-mesenchymal transition, thereby reinforcing the aggressive phenotype of malignant cells. LRP-1 partitioning into rafts and association with tissue-type and tumor grade specific intracellular scaffold proteins appear crucial to determine its function in tumor progression. Those emerging aspects present numerous promising perspectives in oncology and allow envisaging the development of innovative strategies of control of tumor progression through the targeting of LRP-1.
Collapse
Affiliation(s)
- B Langlois
- Laboratoire Signalisation des récepteurs matriciels, CNRS UMR MEDyC 6237, université de Reims-Champagne-Ardenne, campus Moulin-de-la-Housse, BP 1039, 51687, Reims cedex 2, France
| | | | | | | |
Collapse
|