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Biose IJ, Rutkai I, Clossen B, Gage G, Schechtman K, Adkisson HD, Bix GJ. Recombinant Human Perlecan DV and Its LG3 Subdomain Are Neuroprotective and Acutely Functionally Restorative in Severe Experimental Ischemic Stroke. Transl Stroke Res 2023; 14:941-954. [PMID: 36508132 PMCID: PMC10258221 DOI: 10.1007/s12975-022-01089-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/01/2022] [Accepted: 09/20/2022] [Indexed: 12/14/2022]
Abstract
Despite recent therapeutic advancements, ischemic stroke remains a major cause of death and disability. It has been previously demonstrated that ~ 85-kDa recombinant human perlecan domain V (rhPDV) binds to upregulated integrin receptors (α2β1 and α5β1) associated with neuroprotective and functional improvements in various animal models of acute ischemic stroke. Recombinant human perlecan laminin-like globular domain 3 (rhPDVLG3), a 21-kDa C-terminal subdomain of rhPDV, has been demonstrated to more avidly bind to the α2β1 integrin receptor than its parent molecule and consequently was postulated to evoke significant neuroprotective and functional effects. To test this hypothesis, fifty male C57Bl/6 J mice studied in a t-MCAO model were randomly allocated to either rhPDV treatment, rhPDVLG3, or equivalent volume of PBS at the time of reperfusion in a study where all procedures and analyses were conducted blind to treatment. On post-MCAO day 7, 2,3,5-triphenyltetrazolium chloride staining of brain slices was used to quantify infarct volume. We observed that treatment with rhPDVLG3 reduced infarct volume by 65.6% (p = 0.0001), improved weight loss (p < 0.05), and improved functional outcome measures (p < 0.05) when compared to PBS controls, improvements which were generally greater in magnitude than those observed for 2 mg/kg of rhPDV. In addition, treatment with 6 mg/kg of rhPDVLG3 was observed to significantly reduce mortality due to stroke in one model, an outcome not previously observed for rhPDV. Our initial findings suggest that treatment with rhPDVLG3 provides significant improvement in neuroprotective and functional outcomes in experimental stroke models and that further investigation of rhPDVLG3 as a novel neuroprotective therapy for patients with stroke is warranted.
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Affiliation(s)
- Ifechukwude Joachim Biose
- Department of Neurosurgery, Clinical Neuroscience Research Center, Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Ibolya Rutkai
- Department of Neurosurgery, Clinical Neuroscience Research Center, Tulane University School of Medicine, New Orleans, LA, 70112, USA
- Tulane Brain Institute, Tulane University, New Orleans, LA, 70112, USA
| | - Bryan Clossen
- Stream Biomedical, Inc., 2450 Holcombe, Suite J, Houston, TX, 77021, USA
| | - Gary Gage
- Stream Biomedical, Inc., 2450 Holcombe, Suite J, Houston, TX, 77021, USA
| | - Kenneth Schechtman
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - H Davis Adkisson
- Stream Biomedical, Inc., 2450 Holcombe, Suite J, Houston, TX, 77021, USA.
| | - Gregory J Bix
- Department of Neurosurgery, Clinical Neuroscience Research Center, Tulane University School of Medicine, New Orleans, LA, 70112, USA.
- Tulane Brain Institute, Tulane University, New Orleans, LA, 70112, USA.
- Department of Neurology, Tulane University School of Medicine, New Orleans, LA, 70112, USA.
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Fließer E, Lins T, Berg JL, Kolb M, Kwapiszewska G. The endothelium in lung fibrosis: a core signaling hub in disease pathogenesis? Am J Physiol Cell Physiol 2023; 325:C2-C16. [PMID: 37184232 DOI: 10.1152/ajpcell.00097.2023] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/05/2023] [Accepted: 05/05/2023] [Indexed: 05/16/2023]
Abstract
Pulmonary fibrosis (PF) is a progressive chronic lung disease characterized by excessive deposition of extracellular matrix (ECM) and structural destruction, associated with a severe 5-year mortality rate. The onset of the disease is thought to be triggered by chronic damage to the alveolar epithelium. Since the pulmonary endothelium is an important component of the alveolar-capillary niche, it is also affected by the initial injury. In addition to ensuring proper gas exchange, the endothelium has critical functional properties, including regulation of vascular tone, inflammatory responses, coagulation, and maintenance of vascular homeostasis and integrity. Recent single-cell analyses have shown that shifts in endothelial cell (EC) subtypes occur in PF. Furthermore, the increased vascular remodeling associated with PF leads to deteriorated outcomes for patients, underscoring the importance of the vascular bed in PF. To date, the causes and consequences of endothelial and vascular involvement in lung fibrosis are poorly understood. Therefore, it is of great importance to investigate the involvement of EC and the vascular system in the pathogenesis of the disease. In this review, we will outline the current knowledge on the role of the pulmonary vasculature in PF, in terms of abnormal cellular interactions, hyperinflammation, vascular barrier disorders, and an altered basement membrane composition. Finally, we will summarize recent advances in extensive therapeutic research and discuss the significant value of novel therapies targeting the endothelium.
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Affiliation(s)
- Elisabeth Fließer
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Thomas Lins
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Johannes Lorenz Berg
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Division of Physiology and Pathophysiology, Medical University of Graz, Graz, Austria
| | - Martin Kolb
- Firestone Institute for Respiratory Health, Research Institute at St Joseph's Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Division of Physiology and Pathophysiology, Medical University of Graz, Graz, Austria
- Institute for Lung Health, Member of the German Lung Center (DZL), Cardiopulmonary Institute (CPI), Giessen, Germany
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Tang X, Sun M, Shen Q, Rao J, Yang X, Fang Y, Xiang T, Xue S, Sun L, Xu H. Protective role of endorepellin in renal developmental programming. Front Cell Dev Biol 2022; 10:929556. [PMID: 36330336 PMCID: PMC9624284 DOI: 10.3389/fcell.2022.929556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 09/29/2022] [Indexed: 11/18/2022] Open
Abstract
Adverse intrauterine and early postnatal environment cause reduced nephron endowment and subsequent hypertension, chronic kidney disease (CKD). Exploring modifiable approaches is particularly important to alleviate the global burden of CKD. Enhanced glomerular progenitor cell apoptosis is a major contributor to renal developmental programming. The differentially expressed protein perlecan, which we previously identified using proteomics, is an important extracellular matrix glycoprotein, and its domain V (endorepellin) can inhibit apoptosis through a paracrine form. In explanted mice embryonic metanephros, we found that endorepellin can rescue glomeruli-deficit phenotype resulting from malnutrition, and this protective effect was also verified in vivo using a renal developmental programming model which was given a low-protein diet during pregnancy. We further demonstrated that endorepellin significantly inhibited glomerular progenitor cell apoptosis which activates ERK1/2 phosphorylation. Our results show that endorepellin rescues the nephron number reduction in renal developmental programming, possibly through the inhibition of progenitor cell apoptosis via the ERK1/2 pathway.
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Affiliation(s)
- Xiaoshan Tang
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Manqing Sun
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Qian Shen
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Jia Rao
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Xue Yang
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Ye Fang
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Tianchao Xiang
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Shanshan Xue
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
| | - Lei Sun
- Institute of Developmental Biology and Molecular Medicine, Fudan University, Shanghai, China
| | - Hong Xu
- Department of Nephrology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, China
- *Correspondence: Hong Xu,
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Li B, Li P, Xia W, You B, Yu Q, Zhang B, Huang R, Wang R, Liu Y, Chen Z, Gan Y, He Y, Hennenberg M, Stief CG, Chen X. Phosphoproteomics identifies potential downstream targets of the integrin α2β1 inhibitor BTT-3033 in prostate stromal cells. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1380. [PMID: 34733932 PMCID: PMC8506561 DOI: 10.21037/atm-21-3194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/30/2021] [Indexed: 11/17/2022]
Abstract
Background Integrin α2β1 inhibitor BTT-3033 (1-(4-fluorophenyl)-N-methyl-N-[4[[(phenylamino)carbonyl]amino]phenyl]-1H-pyrazole-4-sulfonamide) was recently reported to inhibit neurogenic and thromboxane A2-induced human prostate smooth muscle contraction, and thus represents a target with a different inhibition spectrum than that of α1-blockers in benign prostate hyperplasia (BPH) treatments. Clarifying the underlying mechanisms of the inhibition effects will provide insights into the role of integrin α2β1 in prostate contraction and enable new intracellular targets for smooth muscle contraction to be explored. Methods ProteomeHD was used to predict and enrich the top co-regulated proteins of integrin α2 (ITGA2). A phosphoproteomic analysis was conducted on human prostate stromal cells (WPMY-1) treated with 1 or 10 µM of BTT-3033 or solvent for controls. A clustering analysis was conducted to identify the intracellular targets that were inhibited in a dose-dependent manner. Gene ontology (GO) and annotation enrichments were conducted to examine any functional alterations and identify possible downstream targets. A Kinase-substrate enrichment analysis (KSEA) was conducted to identify kinases-substrate relationships. Results Enrichments of the actin cytoskeleton and guanosine triphosphatases (GTPases) signaling were predicted from the co-regulated proteins with ITGA2. LIM domain kinases, including LIM domain and actin-binding 1 (LIMA1), zyxin (ZYX), and thyroid receptor-interacting protein 6 (TRIP6), which are functionally associated with focal adhesions and the cytoskeleton, were present in the clusters with dose-dependent phosphorylation inhibition pattern. 15 substrates were dose-dependently inhibited according to the KSEA, including polo-like kinase 1 (PLK1), and GTPases signaling proteins, such as disheveled segment polarity protein 2 (DVL2). Conclusions In this study, we proposed that the mechanisms underlying the contractile and proliferative effects of integrin α2β1 are the LIM domain kinases, including the ZYX family, and substrates, including PLK1 and DVL2.
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Affiliation(s)
- Bingsheng Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Pan Li
- Department of Pathology, LMU Munich, Munich, Germany
| | - Weiping Xia
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Baiyang You
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Division of Cardiac Rehabilitation, Department of Physical Medicine and Rehabilitation, Xiangya Hospital, Central South University, Changsha, China
| | - Qingfeng Yu
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bo Zhang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Ru Huang
- Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Ruixiao Wang
- Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Yuhan Liu
- Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Zhi Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yu Gan
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yao He
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Martin Hennenberg
- Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Christian G Stief
- Department of Urology, University Hospital Munich, LMU Munich, Munich, Germany
| | - Xiang Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
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Migneault F, Hébert MJ. Autophagy, tissue repair, and fibrosis: a delicate balance. Matrix Biol 2021; 100-101:182-196. [PMID: 33454422 DOI: 10.1016/j.matbio.2021.01.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 12/12/2022]
Abstract
Tissue repair and fibrosis, an abnormal form of repair, occur in most human organs in response to injury or inflammation. Fibroblasts play a major role in the normal repair process by differentiating into myofibroblasts that synthesize extracellular matrix (ECM) components and favor tissue remodeling to reestablish normal function and integrity. However, their persistent accumulation at the site of injury is a hallmark of fibrosis. Autophagy is a catabolic process that occurs in eukaryotic cells as a stress response to allow cell survival and maintenance of cellular homeostasis by degrading and recycling intracellular components. Recent advances identify autophagy as an important regulator of myofibroblast differentiation, tissue remodeling, and fibrogenesis. In this mini-review, we provide an overview of the interactions between autophagy, ECM, and fibrosis, and emphasize the molecular mechanisms involved in myofibroblast differentiation. We also describe the emerging concept of secretory autophagy as a new avenue for intercellular communication at the site of tissue injury and repair.
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Affiliation(s)
- Francis Migneault
- Centre de recherche, Centre hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC H2X 0A9, Canada; Canadian Donation and Transplantation Research Program, Edmonton, Alberta T6G 2E1, Canada
| | - Marie-Josée Hébert
- Centre de recherche, Centre hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC H2X 0A9, Canada; Canadian Donation and Transplantation Research Program, Edmonton, Alberta T6G 2E1, Canada; Département de médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada.
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6
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Li B, Wang X, Wang R, Rutz B, Ciotkowska A, Gratzke C, Herlemann A, Spek A, Tamalunas A, Waidelich R, Stief CG, Hennenberg M. Inhibition of neurogenic and thromboxane A 2 -induced human prostate smooth muscle contraction by the integrin α2β1 inhibitor BTT-3033 and the integrin-linked kinase inhibitor Cpd22. Prostate 2020; 80:831-849. [PMID: 32449814 DOI: 10.1002/pros.23998] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/16/2020] [Accepted: 04/19/2020] [Indexed: 01/23/2023]
Abstract
INTRODUCTION Prostate smooth muscle contraction is critical for etiology and treatment of lower urinary tract symptoms in benign prostatic hyperplasia (BPH). Integrins connect the cytoskeleton to membranes and cells to extracellular matrix, what is essential for force generation in smooth muscle contraction. Integrins are composed of different subunits and may cooperate with integrin-linked kinase (ILK). Here, we examined effects of inhibitors for different integrin heterodimers and ILK on contraction of human prostate tissues. METHODS Prostate tissues were obtained from radical prostatectomy. Integrins and ILK were detected by Western blot, real-time polymerase chain reaction (RT-PCR), and double fluorescence staining. Smooth muscle contractions of prostate strips were studied in an organ bath. Contractions were compared after application of solvent (controls), the ILK inhibitor Cpd22 (N-methyl-3-(1-(4-(piperazin-1-yl)phenyl)-5-(4'-(trifluoromethyl)-[1,1'-biphenyl]-4-yl)-1H-pyrazol-3-yl)propanamide), the integrin α2β1 inhibitor BTT-3033 (1-(4-fluorophenyl)-N-methyl-N-[4[[(phenylamino)carbonyl]amino]phenyl]-1H-pyrazole-4-sulfonamide), or the integrin α4β1/α9β1 inhibitor BOP (N-(benzenesulfonyl)- l-prolyl- l-O-(1-pyrrolidinylcarbonyl)tyrosine sodium salt). RESULTS Western blot analyses of prostate tissues using antibodies raised against integrins α2b, α4, α9, β1, and ILK revealed bands matching the expected sizes of corresponding antigens. Expression of integrins and ILK was confirmed by RT-PCR. Individual variations of expression levels occurred independently from divergent degree of BPH, reflected by different contents of prostate-specific antigen. Double fluorescence staining of prostate sections using antibodies raised against integrins α2 and β1, or against ILK resulted in immunoreactivity colocalizing with calponin, suggesting localization in prostate smooth muscle cells. Electric field stimulation (EFS) induced frequency-dependent contractions, which were inhibited by Cpd22 (3 µM) and BTT-3033 (1 µM) (inhibition around 37% by Cpd22 and 46% by BTT-3033 at 32 Hz). The thromboxane A2 analog U46619-induced concentration-dependent contractions, which were inhibited by Cpd22 and BTT-3033 (around 67% by Cpd22 and 39% by BTT-3033 at 30 µM U46619). Endothelin-1 induced concentration-dependent contractions, which were not affected by Cpd22 or BTT-3033. Noradrenaline and the α1 -adrenergic agonists methoxamine and phenylephrine-induced concentration-dependent contractions, which were not or very slightly inhibited by Cpd22 and BTT-3033. BOP did not change EFS- or agonist-induced contraction. CONCLUSIONS Integrin α2β1 and ILK inhibitors inhibit neurogenic and thromboxane A2 -induced prostate smooth muscle contraction in human BPH. A role for these targets for prostate smooth muscle contraction may appear possible.
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Affiliation(s)
- Bingsheng Li
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Xiaolong Wang
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Ruixiao Wang
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Beata Rutz
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Anna Ciotkowska
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | | | - Annika Herlemann
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Annabel Spek
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | | | | | - Christian G Stief
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
| | - Martin Hennenberg
- Department of Urology, LMU Munich, University Hospital, Munich, Germany
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de Castro Brás LE, Frangogiannis NG. Extracellular matrix-derived peptides in tissue remodeling and fibrosis. Matrix Biol 2020; 91-92:176-187. [PMID: 32438055 DOI: 10.1016/j.matbio.2020.04.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 12/26/2022]
Abstract
Alterations in the composition of the extracellular matrix (ECM) critically regulate the cellular responses in tissue repair, remodeling, and fibrosis. After injury, proteolytic degradation of ECM generates bioactive ECM fragments, named matricryptins, exposing cryptic sites with actions distinct from the parent molecule. Matricryptins contribute to the regulation of inflammatory, reparative, and fibrogenic cascades through effects on several different cell types both in acute and chronic settings. Fibroblasts play a major role in matricryptin generation not only as the main cellular source of ECM proteins, but also as producers of matrix-degrading proteases. Moreover, several matricryptins exert fibrogenic or reparative actions by modulating fibroblast phenotype and function. This review manuscript focuses on the mechanisms of matricyptin generation in injured and remodeling tissues with an emphasis on fibroblast-matricryptin interactions.
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Affiliation(s)
- Lisandra E de Castro Brás
- The Brody School of Medicine, East Carolina University, Department of Physiology, Greenville 27858 North Carolina.
| | - Nikolaos G Frangogiannis
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, New York
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8
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Dieudé M, Cardinal H, Hébert MJ. Injury derived autoimmunity: Anti-perlecan/LG3 antibodies in transplantation. Hum Immunol 2019; 80:608-613. [PMID: 31029511 DOI: 10.1016/j.humimm.2019.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/08/2019] [Accepted: 04/13/2019] [Indexed: 01/02/2023]
Abstract
Ischemic, immunologic or pharmacological stressors can induce vascular injury and endothelial apoptosis in organ donors, in transplant candidates due to the impact of end stage organ failure on the vasculature, and in association with peri-transplantation events. Vascular injury may shape innate and adaptive immune responses, leading to dysregulation in the balance between tolerance and immunoreactivity to vascular-derived antigens. Mounting evidence shows that the early stages of apoptosis, characterized by the absence of membrane permeabilization, are prone to trigger various modes of intercellular communication allowing neoantigen production, exposure, or both. In this review, we present the evidence for the release of LG3, an immunogenic fragment of perlecan, as a consequence of caspase-3 dependent vascular apoptosis leading to the genesis of anti-LG3 autoantibodies and the consequences of these autoantibodies in native and transplanted kidneys.
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Affiliation(s)
- Mélanie Dieudé
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Canadian Donation and Transplantation Research Program, Canada; Université de Montréal, Canada.
| | - Héloïse Cardinal
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Canadian Donation and Transplantation Research Program, Canada; Université de Montréal, Canada.
| | - Marie-Josée Hébert
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Canadian Donation and Transplantation Research Program, Canada; Université de Montréal, Canada.
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9
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Padet L, Dieudé M, Karakeussian‐Rimbaud A, Yang B, Turgeon J, Cailhier J, Cardinal H, Hébert M. New insights into immune mechanisms of antiperlecan/LG3 antibody production: Importance of T cells and innate B1 cells. Am J Transplant 2019; 19:699-712. [PMID: 30129231 PMCID: PMC6519043 DOI: 10.1111/ajt.15082] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/25/2018] [Accepted: 07/29/2018] [Indexed: 01/25/2023]
Abstract
Autoantibodies against perlecan/LG3 (anti-LG3) have been associated with increased risks of delayed graft function, acute rejection, and reduced long-term survival. High titers of anti-LG3 antibodies have been found in de novo renal transplants recipients in the absence of allosensitizing or autoimmune conditions. Here, we seek to understand the pathways controlling anti-LG3 production prior to transplantation. Mice immunized with recombinant LG3 produce concomitantly IgM and IgG anti-LG3 antibodies suggesting a memory response. ELISpot confirmed the presence of LG3-specific memory B cells in nonimmunized mice. Purification of B1 and B2 subtypes identified peritoneal B1 cells as the major source of memory B cells reactive to LG3. Although nonimmunized CD4-deficient mice were found to express LG3-specific memory B cells, depletion of CD4+ T cells in wild type mice during immunization significantly decreased anti-LG3 production. These results demonstrate that B cell memory to LG3 is T cell independent but that production of anti-LG3 antibodies requires T cell help. Further supporting an important role for T cells in controlling anti-LG3 levels, we found that human renal transplant recipients show a significant decrease in anti-LG3 titers upon the initiation of CNI-based immunosuppression. Collectively, these results identify T cell targeting interventions as a means of reducing anti-LG3 levels in renal transplant patients.
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Affiliation(s)
- Lauriane Padet
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada,Université de MontréalMontrealQuebecCanada
| | - Mélanie Dieudé
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada
| | - Annie Karakeussian‐Rimbaud
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada
| | - Bing Yang
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada,Université de MontréalMontrealQuebecCanada
| | - Julie Turgeon
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada
| | - Jean‐François Cailhier
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada
| | - Héloïse Cardinal
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada
| | - Marie‐Josée Hébert
- Research CentreCentre Hospitalier de l'Université de Montréal (CRCHUM)MontrealQuebecCanada,Canadian National Transplant Research ProgramEdmontonAlbertaCanada,Université de MontréalMontrealQuebecCanada
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10
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Lord MS, Tang F, Rnjak-Kovacina J, Smith JGW, Melrose J, Whitelock JM. The multifaceted roles of perlecan in fibrosis. Matrix Biol 2018; 68-69:150-166. [PMID: 29475023 DOI: 10.1016/j.matbio.2018.02.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 02/15/2018] [Accepted: 02/16/2018] [Indexed: 12/11/2022]
Abstract
Perlecan, or heparan sulfate proteoglycan 2 (HSPG2), is a ubiquitous heparan sulfate proteoglycan that has major roles in tissue and organ development and wound healing by orchestrating the binding and signaling of mitogens and morphogens to cells in a temporal and dynamic fashion. In this review, its roles in fibrosis are reviewed by drawing upon evidence from tissue and organ systems that undergo fibrosis as a result of an uncontrolled response to either inflammation or traumatic cellular injury leading to an over production of a collagen-rich extracellular matrix. This review focuses on examples of fibrosis that occurs in lung, liver, kidney, skin, kidney, neural tissues and blood vessels and its link to the expression of perlecan in that particular organ system.
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Affiliation(s)
- Megan S Lord
- Graduate School of Biomedical Engineering, UNSW Sydney, NSW 2052, Australia.
| | - Fengying Tang
- Graduate School of Biomedical Engineering, UNSW Sydney, NSW 2052, Australia
| | | | - James G W Smith
- University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - James Melrose
- Graduate School of Biomedical Engineering, UNSW Sydney, NSW 2052, Australia; Raymond Purves Bone and Joint Research Laboratory, Kolling Institute Northern Sydney Local Health District, St. Leonards, NSW 2065, Australia; Sydney Medical School, Northern, The University of Sydney, Royal North Shore Hospital, St. Leonards, NSW 2065, Australia
| | - John M Whitelock
- Graduate School of Biomedical Engineering, UNSW Sydney, NSW 2052, Australia
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de Sousa Mesquita AP, de Araújo Lopes S, Pernambuco Filho PCA, Nader HB, Lopes CC. Acquisition of anoikis resistance promotes alterations in the Ras/ERK and PI3K/Akt signaling pathways and matrix remodeling in endothelial cells. Apoptosis 2017; 22:1116-1137. [DOI: 10.1007/s10495-017-1392-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Genovese F, Karsdal MA. Protein degradation fragments as diagnostic and prognostic biomarkers of connective tissue diseases: understanding the extracellular matrix message and implication for current and future serological biomarkers. Expert Rev Proteomics 2016; 13:213-25. [PMID: 26689914 DOI: 10.1586/14789450.2016.1134327] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The aim of this review is to discuss the potential usefulness of novel biochemical markers of connective tissues: neo-epitopes of extracellular matrix proteins generated by post-translational modifications by tissue proteinases. As each modification results from a specific local physiological or pathobiological process, the identification of specific proteinase-mediated cleavage products of tissue-specific proteins may produce a unique disease-specific biochemical marker. The authors present a novel interpretation of the process of tissue degradation described by neo-epitope fragments of the interstitial and basement membrane matrix in fibrotic disease, and the diagnostic and prognostic potential of such markers. Moreover, the authors highlight the importance of matrix protein fragments not only as markers of tissue remodeling, but also as players in tissue remodeling, due to their signaling properties.
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Affiliation(s)
- Federica Genovese
- a Fibrosis Biology and Biomarkers, Nordic Bioscience A/S , Herlev , Denmark
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13
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Indovina P, Casini N, Forte IM, Garofano T, Cesari D, Iannuzzi CA, Del Porro L, Pentimalli F, Napoliello L, Boffo S, Schenone S, Botta M, Giordano A. SRC Family Kinase Inhibition in Ewing Sarcoma Cells Induces p38 MAP Kinase-Mediated Cytotoxicity and Reduces Cell Migration. J Cell Physiol 2016; 232:129-35. [PMID: 27037775 DOI: 10.1002/jcp.25397] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 03/31/2016] [Indexed: 11/11/2022]
Abstract
Ewing sarcoma (ES) is a highly aggressive bone and soft tissue cancer, representing the second most common primary malignant bone tumor in children and adolescents. Although the development of a multimodal therapy, including both local control (surgery and/or radiation) and systemic multidrug chemotherapy, has determined a significant improvement in survival, patients with metastatic and recurrent disease still face a poor prognosis. Moreover, considering that ES primarily affects young patients, there are concerns about long-term adverse effects of the therapy. Therefore, more rational strategies, targeting specific molecular alterations underlying ES, are required. Recent studies suggest that SRC family kinases (SFKs), which are aberrantly activated in most cancer types, could represent key therapeutic targets also for ES. Here, we challenged ES cell lines with a recently developed selective SFK inhibitor (a pyrazolo[3,4-d]pyrimidine derivative, called SI221), which was previously shown to be a valuable proapoptotic agent in other tumor types while not affecting normal cells. We observed that SI221 significantly reduced ES cell viability and proved to be more effective than the well-known SFK inhibitor PP2. SI221 was able to induce apoptosis in ES cells and also reduced ES cell clonogenic potential. Furthermore, SI221 was also able to reduce ES cell migration. At the molecular level, our data suggest that SFK inhibition through SI221 could reduce ES cell viability at least in part by hindering an SFK-NOTCH1 receptor-p38 mitogen-activated protein kinase (MAPK) axis. Overall, our study suggests a potential application of specific SFK inhibition in ES therapy. J. Cell. Physiol. 232: 129-135, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Paola Indovina
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy. .,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania.
| | - Nadia Casini
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Iris Maria Forte
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Tumori "Fondazione G. Pascale"-IRCCS, Naples, Italy
| | | | - Daniele Cesari
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Carmelina Antonella Iannuzzi
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Tumori "Fondazione G. Pascale"-IRCCS, Naples, Italy
| | - Leonardo Del Porro
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Francesca Pentimalli
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Tumori "Fondazione G. Pascale"-IRCCS, Naples, Italy
| | - Luca Napoliello
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Silvia Boffo
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania
| | | | - Maurizio Botta
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania.,Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Antonio Giordano
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania.
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14
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Casini N, Forte IM, Mastrogiovanni G, Pentimalli F, Angelucci A, Festuccia C, Tomei V, Ceccherini E, Di Marzo D, Schenone S, Botta M, Giordano A, Indovina P. SRC family kinase (SFK) inhibition reduces rhabdomyosarcoma cell growth in vitro and in vivo and triggers p38 MAP kinase-mediated differentiation. Oncotarget 2016; 6:12421-35. [PMID: 25762618 PMCID: PMC4494948 DOI: 10.18632/oncotarget.3043] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 01/07/2015] [Indexed: 01/08/2023] Open
Abstract
Recent data suggest that SRC family kinases (SFKs) could represent potential therapeutic targets for rhabdomyosarcoma (RMS), the most common soft-tissue sarcoma in children. Here, we assessed the effect of a recently developed selective SFK inhibitor (a pyrazolo[3,4-d]pyrimidine derivative, called SI221) on RMS cell lines. SI221, which showed to be mainly effective against the SFK member YES, significantly reduced cell viability and induced apoptosis, without affecting non-tumor cells, such as primary human skin fibroblasts and differentiated C2C12 cells. Moreover, SI221 decreased in vitro cell migration and invasion and reduced tumor growth in a RMS xenograft model. SFK inhibition also induced muscle differentiation in RMS cells by affecting the NOTCH3 receptor-p38 mitogen-activated protein kinase (MAPK) axis, which regulates the balance between proliferation and differentiation. Overall, our findings suggest that SFK inhibition, besides reducing RMS cell growth and invasive potential, could also represent a differentiation therapeutic strategy for RMS.
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Affiliation(s)
- Nadia Casini
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Iris Maria Forte
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale per lo Studio e la Cura dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, Italy
| | - Gianmarco Mastrogiovanni
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Francesca Pentimalli
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale per lo Studio e la Cura dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, Italy
| | - Adriano Angelucci
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Claudio Festuccia
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Valentina Tomei
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Elisa Ceccherini
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
| | - Domenico Di Marzo
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale per lo Studio e la Cura dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, Italy
| | | | - Maurizio Botta
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia PA, USA
| | - Antonio Giordano
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy.,Oncology Research Center of Mercogliano (CROM), Istituto Nazionale per lo Studio e la Cura dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia PA, USA
| | - Paola Indovina
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia PA, USA
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15
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Poluzzi C, Iozzo RV, Schaefer L. Endostatin and endorepellin: A common route of action for similar angiostatic cancer avengers. Adv Drug Deliv Rev 2016; 97:156-73. [PMID: 26518982 DOI: 10.1016/j.addr.2015.10.012] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/15/2015] [Accepted: 10/16/2015] [Indexed: 12/17/2022]
Abstract
Traditional cancer therapy typically targets the tumor proper. However, newly-formed vasculature exerts a major role in cancer development and progression. Autophagy, as a biological mechanism for clearing damaged proteins and oxidative stress products released in the tumor milieu, could help in tumor resolution by rescuing cells undergoing modifications or inducing autophagic-cell death of tumor blood vessels. Cleaved fragments of extracellular matrix proteoglycans are emerging as key players in the modulation of angiogenesis and endothelial cell autophagy. An essential characteristic of cancer progression is the remodeling of the basement membrane and the release of processed forms of its constituents. Endostatin, generated from collagen XVIII, and endorepellin, the C-terminal segment of the large proteoglycan perlecan, possess a dual activity as modifiers of both angiogenesis and endothelial cell autophagy. Manipulation of these endogenously-processed forms, located in the basement membrane within tumors, could represent new therapeutic approaches for cancer eradication.
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Affiliation(s)
- Chiara Poluzzi
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Liliana Schaefer
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany.
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16
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Tang XS, Shen Q, Chen J, Zha XL, Xu H. Maternal protein restriction reduces perlecan at mid-metanephrogenesis in rats. Nephrology (Carlton) 2016; 21:200-8. [PMID: 26246161 DOI: 10.1111/nep.12583] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Xiao-Shan Tang
- Department of Nephrology and Rheumatology; Children's Hospital of Fudan University; Shanghai China
| | - Qian Shen
- Department of Nephrology and Rheumatology; Children's Hospital of Fudan University; Shanghai China
| | - Jing Chen
- Department of Nephrology and Rheumatology; Children's Hospital of Fudan University; Shanghai China
| | - Xi-Liang Zha
- Department of Biochemistry and Molecular Biology; Shanghai Medical College; Fudan University; Shanghai China
| | - Hong Xu
- Department of Nephrology and Rheumatology; Children's Hospital of Fudan University; Shanghai China
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17
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Dieudé M, Bell C, Turgeon J, Beillevaire D, Pomerleau L, Yang B, Hamelin K, Qi S, Pallet N, Béland C, Dhahri W, Cailhier JF, Rousseau M, Duchez AC, Lévesque T, Lau A, Rondeau C, Gingras D, Muruve D, Rivard A, Cardinal H, Perreault C, Desjardins M, Boilard É, Thibault P, Hébert MJ. The 20
S
proteasome core, active within apoptotic exosome-like vesicles, induces autoantibody production and accelerates rejection. Sci Transl Med 2015; 7:318ra200. [DOI: 10.1126/scitranslmed.aac9816] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Ceccherini E, Indovina P, Zamperini C, Dreassi E, Casini N, Cutaia O, Forte IM, Pentimalli F, Esposito L, Polito MS, Schenone S, Botta M, Giordano A. SRC family kinase inhibition through a new pyrazolo[3,4-d]pyrimidine derivative as a feasible approach for glioblastoma treatment. J Cell Biochem 2015; 116:856-63. [PMID: 25521525 DOI: 10.1002/jcb.25042] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 12/15/2014] [Indexed: 12/27/2022]
Abstract
Glioblastoma (GB) is the most common and aggressive primary tumor of the central nervous system. The current standard of care for GB consists of surgical resection, followed by radiotherapy combined with temozolomide chemotherapy. However, despite this intensive treatment, the prognosis remains extremely poor. Therefore, more effective therapies are urgently required. Recent studies indicate that SRC family kinases (SFKs) could represent promising molecular targets for GB therapy. Here, we challenged four GB cell lines with a new selective pyrazolo[3,4-d]pyrimidine derivative SFK inhibitor, called SI221. This compound exerted a significant cytotoxic effect on GB cells, without significantly affecting non-tumor cells (primary human skin fibroblasts), as evaluated by MTS assay. We also observed that SI221 was more effective than the well-known SFK inhibitor PP2 in GB cells. Notably, despite the high intrinsic resistance to apoptosis of GB cells, SI221 was able to induce this cell death process in all the GB cell lines, as observed through cytofluorimetric analysis and caspase-3 assay. SI221 also exerted a long-term inhibition of GB cell growth and was able to reduce GB cell migration, as shown by clonogenic assay and scratch test, respectively. Moreover, through in vitro pharmacokinetic assays, SI221 proved to have a high metabolic stability and a good potential to cross the blood brain barrier, which is an essential requirement for a drug intended to treat brain tumors. Therefore, despite the need of developing strategies to improve SI221 solubility, our results suggest a potential application of this selective SFK inhibitor in GB therapy.
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Affiliation(s)
- Elisa Ceccherini
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, Italy
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19
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Bernard M, Dieudé M, Yang B, Hamelin K, Underwood K, Hébert MJ. Autophagy fosters myofibroblast differentiation through MTORC2 activation and downstream upregulation of CTGF. Autophagy 2015; 10:2193-207. [PMID: 25495560 PMCID: PMC4502773 DOI: 10.4161/15548627.2014.981786] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Recent evidence suggests that autophagy may favor fibrosis through enhanced differentiation of fibroblasts in myofibroblasts. Here, we sought to characterize the mediators and signaling pathways implicated in autophagy-induced myofibroblast differentiation. Fibroblasts, serum starved for up to 4 d, showed increased LC3-II/-I ratios and decreased SQSTM1/p62 levels. Autophagy was associated with acquisition of markers of myofibroblast differentiation including increased protein levels of ACTA2/αSMA (actin, α 2, smooth muscle, aorta), enhanced gene and protein levels of COL1A1 (collagen, type I, α 1) and COL3A1, and the formation of stress fibers. Inhibiting autophagy with 3 different class I phosphoinositide 3-kinase and class III phosphatidylinositol 3-kinase (PtdIns3K) inhibitors or through ATG7 silencing prevented myofibroblast differentiation. Autophagic fibroblasts showed increased expression and secretion of CTGF (connective tissue growth factor), and CTGF silencing prevented myofibroblast differentiation. Phosphorylation of the MTORC1 target RPS6KB1/p70S6K kinase was abolished in starved fibroblasts. Phosphorylation of AKT at Ser473, a MTORC2 target, was reduced after initiation of starvation but was followed by spontaneous rephosphorylation after 2 d of starvation, suggesting the reactivation of MTORC2 with sustained autophagy. Inhibiting MTORC2 activation with long-term exposure to rapamycin or by silencing RICTOR, a central component of the MTORC2 complex abolished AKT rephosphorylation. Both RICTOR silencing and rapamycin treatment prevented CTGF and ACTA2 upregulation, demonstrating the central role of MTORC2 activation in CTGF induction and myofibroblast differentiation. Finally, inhibition of autophagy with PtdIns3K inhibitors or ATG7 silencing blocked AKT rephosphorylation. Collectively, these results identify autophagy as a novel activator of MTORC2 signaling leading to CTGF induction and myofibroblast differentiation.
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Key Words
- 3-MA, 3-methyladenine
- ACTA2, actin, α 2, smooth muscle, aorta
- AKT
- ATG7
- Ctl, control
- DAPI, 4′, 6-diamidino-2-phenylindole
- ECM, extracellular matrix
- FBS, fetal bovine serum
- GF, growth factor
- LC3B, MAP1LC3B (microtubule-associated protein 1 light chain 3 β)
- LY, LY294002
- MTORC2
- N, normal growth medium
- R, rapamycin
- SS, serum-free (starvation) medium
- T, TGFB1 (transforming growth factor, β 1)
- TUBA, tubulin, α
- V, vehicle
- W, wortmannin
- WB, western blotting
- autophagy
- connective tissue growth factor (CTGF)
- differentiation
- fibroblast
- fibrosis
- iso, isotype control
- myofibroblast
- rapamycin
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Affiliation(s)
- Monique Bernard
- a Centre de Recherche du Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal ; Montreal , QC , Canada
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20
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Nakamura R, Nakamura F, Fukunaga S. Perlecan Diversely Regulates the Migration and Proliferation of Distinct Cell Types in vitro. Cells Tissues Organs 2015; 200:374-93. [PMID: 26562025 DOI: 10.1159/000440950] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2015] [Indexed: 11/19/2022] Open
Abstract
Perlecan is a multifunctional component of the extracellular matrix. It shows different effects on distinct cell types, and therefore it is thought to show potential for therapies targeting multiple cell types. However, the full range of multifunctionality of perlecan remains to be elucidated. We cultured various cell types, which were derived from epithelial/endothelial, connective and muscle tissues, in the presence of either antiserum against perlecan or exogenous perlecan, and examined the effects of perlecan on cell migration and proliferation. Cell migration was determined using a scratch assay. Blocking of perlecan by anti-perlecan antiserum inhibited the migration of vascular endothelial cells (VECs) and bone marrow-derived mesenchymal stem cells, and exogenous perlecan added to the culture medium promoted the migration of these cell types. The migration of other cell types was inhibited or was not promoted by exogenous perlecan. Cell proliferation was measured using a water-soluble tetrazolium dye. When cells were cultured at low densities, perlecan blocking inhibited the proliferation of VECs, and exogenous perlecan promoted the proliferation of keratinocytes. In contrast, the proliferation of fibroblasts, pre-adipocytes and vascular smooth muscle cells cultured at low densities was inhibited by exogenous perlecan. When cells were cultured at high densities, perlecan blocking promoted the proliferation of most cell types, with the exception of skeletal system-derived cells (chondrocytes and osteoblasts), which were inhibited by exogenous perlecan. Our results provide an overview of the multiple functions of perlecan in various cell types, and implicate a potential role of perlecan to inhibit undesirable activities, such as fibrosis, obesity and intimal hyperplasia.
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Affiliation(s)
- Ryosuke Nakamura
- Laboratory of Animal By-Product Science, Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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21
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Hébert MJ, Jevnikar AM. The Impact of Regulated Cell Death Pathways on Alloimmune Responses and Graft Injury. CURRENT TRANSPLANTATION REPORTS 2015. [DOI: 10.1007/s40472-015-0067-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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22
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Karsdal MA, Manon-Jensen T, Genovese F, Kristensen JH, Nielsen MJ, Sand JMB, Hansen NUB, Bay-Jensen AC, Bager CL, Krag A, Blanchard A, Krarup H, Leeming DJ, Schuppan D. Novel insights into the function and dynamics of extracellular matrix in liver fibrosis. Am J Physiol Gastrointest Liver Physiol 2015; 308:G807-30. [PMID: 25767261 PMCID: PMC4437019 DOI: 10.1152/ajpgi.00447.2014] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/04/2015] [Indexed: 02/06/2023]
Abstract
Emerging evidence suggests that altered components and posttranslational modifications of proteins in the extracellular matrix (ECM) may both initiate and drive disease progression. The ECM is a complex grid consisting of multiple proteins, most of which play a vital role in containing the essential information needed for maintenance of a sophisticated structure anchoring the cells and sustaining normal function of tissues. Therefore, the matrix itself may be considered as a paracrine/endocrine entity, with more complex functions than previously appreciated. The aims of this review are to 1) explore key structural and functional components of the ECM as exemplified by monogenetic disorders leading to severe pathologies, 2) discuss selected pathological posttranslational modifications of ECM proteins resulting in altered functional (signaling) properties from the original structural proteins, and 3) discuss how these findings support the novel concept that an increasing number of components of the ECM harbor signaling functions that can modulate fibrotic liver disease. The ECM entails functions in addition to anchoring cells and modulating their migratory behavior. Key ECM components and their posttranslational modifications often harbor multiple domains with different signaling potential, in particular when modified during inflammation or wound healing. This signaling by the ECM should be considered a paracrine/endocrine function, as it affects cell phenotype, function, fate, and finally tissue homeostasis. These properties should be exploited to establish novel biochemical markers and antifibrotic treatment strategies for liver fibrosis as well as other fibrotic diseases.
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Affiliation(s)
- Morten A. Karsdal
- 1Nordic Bioscience A/S, Herlev Hovedgade, Herlev, Denmark; ,2University of Southern Denmark, SDU, Odense, Denmark;
| | | | | | | | | | | | | | | | | | - Aleksander Krag
- 3Department of Gastroenterology and Hepatology, Odense University Hospital, University of Southern Denmark, Odense, Denmark;
| | - Andy Blanchard
- 4GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, United Kingdom;
| | - Henrik Krarup
- 5Section of Molecular Biology, Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark;
| | | | - Detlef Schuppan
- 6Institute of Translational Immunology and Research Center for Immunotherapy, University of Mainz Medical Center, Mainz, Germany; ,7Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
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23
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Pilon EA, Dieudé M, Qi S, Hamelin K, Pomerleau L, Beillevaire D, Durocher Y, Zutter M, Coutu D, Perreault C, Hébert MJ. The perlecan fragment LG3 regulates homing of mesenchymal stem cells and neointima formation during vascular rejection. Am J Transplant 2015; 15:1205-18. [PMID: 25808553 DOI: 10.1111/ajt.13119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 11/04/2014] [Accepted: 11/20/2014] [Indexed: 01/25/2023]
Abstract
Transplant vasculopathy is associated with neointimal accumulation of recipient-derived mesenchymal stem cells. Increased circulating levels of LG3, a C-terminal fragment of perlecan, were found in renal transplant patients with vascular rejection. Here, we evaluated whether LG3 regulates the migration and homing of mesenchymal stem cells and the accumulation of recipient-derived neointimal cells. Mice were transplanted with a fully-MHC mismatched aortic graft followed by intravenous injection of recombinant LG3. LG3 injections increased neointimal accumulation of α-smooth muscle actin positive cells. When green fluorescent protein (GFP)-transgenic mice were used as recipients, LG3 injection favored accumulation of GFP+ cells to sites of neointima formation. LG3 increased horizontal migration and transmigration of mouse and human MSC in vitro and led to increased ERK1/2 phosphorylation. Neutralizing β1 integrin antibodies or use of mesenchymal stem cells from α2 integrin-/- mice decreased migration in response to recombinant LG3. Reduced intima-media ratios and decreased numbers of neointimal cells showing ERK1/2 phosphorylation were found in α2-/- recipients injected with recombinant LG3. Collectively, our results suggest that LG3, through interactions with α2β1 integrins on recipient-derived cells leading to activation of ERK1/2 and increased migration, favors myointimal thickening.
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Affiliation(s)
- E A Pilon
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
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24
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Iozzo RV, Schaefer L. Proteoglycan form and function: A comprehensive nomenclature of proteoglycans. Matrix Biol 2015; 42:11-55. [PMID: 25701227 PMCID: PMC4859157 DOI: 10.1016/j.matbio.2015.02.003] [Citation(s) in RCA: 789] [Impact Index Per Article: 87.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 02/09/2015] [Indexed: 02/07/2023]
Abstract
We provide a comprehensive classification of the proteoglycan gene families and respective protein cores. This updated nomenclature is based on three criteria: Cellular and subcellular location, overall gene/protein homology, and the utilization of specific protein modules within their respective protein cores. These three signatures were utilized to design four major classes of proteoglycans with distinct forms and functions: the intracellular, cell-surface, pericellular and extracellular proteoglycans. The proposed nomenclature encompasses forty-three distinct proteoglycan-encoding genes and many alternatively-spliced variants. The biological functions of these four proteoglycan families are critically assessed in development, cancer and angiogenesis, and in various acquired and genetic diseases where their expression is aberrant.
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Affiliation(s)
- Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Liliana Schaefer
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany.
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Douglass S, Goyal A, Iozzo RV. The role of perlecan and endorepellin in the control of tumor angiogenesis and endothelial cell autophagy. Connect Tissue Res 2015; 56:381-91. [PMID: 26181327 PMCID: PMC4769797 DOI: 10.3109/03008207.2015.1045297] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
During tumor growth and angiogenesis there is a dynamic remodeling of tissue architecture often accompanied by the release of extracellular matrix constituents full of biological activity. One of the key constituents of the tumor microenvironment is the large heparan sulfate proteoglycan perlecan. This proteoglycan, strategically located at cell surfaces and within basement membranes, is a well-defined pro-angiogenic molecule when intact. However, when partially processed by proteases released during cancer remodeling and invasion, the C-terminal fragment of perlecan, known as endorepellin, has opposite effects than its parent molecule. Endorepellin is a potent inhibitor of angiogenesis by exerting a dual receptor antagonism by simultaneously engaging VEGFR2 and α2β1 integrin. Signaling through the α2β1 integrin leads to actin disassembly and block of endothelial cell migration, necessary for capillary morphogenesis. Signaling through the VEGFR2 induces dephosphorylation of the receptor via activation of SHP-1 and suppression of downstream proangiogenic effectors, especially attenuating VEGFA expression. A novel and emerging role of endorepellin is its ability to evoke autophagy by activating Peg3 and various canonical autophagic markers. This effect is specific for endothelial cells as these are the primary cells expressing both VEGFR2 and α2β1 integrin. Thus, an endogenous fragment of a ubiquitous proteoglycan can regulate both angiogenesis and autophagy through a dual receptor antagonism. The biological properties of this natural endogenous protein place endorepellin as a potential therapeutic agent against cancer or diseases where angiogenesis is prominent.
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Affiliation(s)
- Stephen Douglass
- a Department of Pathology , Anatomy and Cell Biology and the Cancer Cell Biology and Signalling Program, Kimmel Cancer Centre, Sidney Kimmel Medical College at Thomas Jefferson University , Philadelphia , PA , USA
| | - Atul Goyal
- a Department of Pathology , Anatomy and Cell Biology and the Cancer Cell Biology and Signalling Program, Kimmel Cancer Centre, Sidney Kimmel Medical College at Thomas Jefferson University , Philadelphia , PA , USA
| | - Renato V Iozzo
- a Department of Pathology , Anatomy and Cell Biology and the Cancer Cell Biology and Signalling Program, Kimmel Cancer Centre, Sidney Kimmel Medical College at Thomas Jefferson University , Philadelphia , PA , USA
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Poluzzi C, Casulli J, Goyal A, Mercer TJ, Neill T, Iozzo RV. Endorepellin evokes autophagy in endothelial cells. J Biol Chem 2014; 289:16114-28. [PMID: 24737315 DOI: 10.1074/jbc.m114.556530] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Endorepellin, the C-terminal fragment of the heparan sulfate proteoglycan perlecan, possesses angiostatic activity via dual receptor antagonism, through concurrent binding to the α2β1 integrin and vascular endothelial growth factor receptor 2 (VEGFR2). Here, we discovered that soluble endorepellin induced autophagy in endothelial cells by modulating the expression of Beclin 1, LC3, and p62, three established autophagic markers. Moreover, endorepellin evoked expression of the imprinted tumor suppressor gene Peg3 and its co-localization with Beclin 1 and LC3 in autophagosomes, suggesting a major role for this gene in endothelial cell autophagy. Mechanistically, endorepellin induced autophagy by down-regulating VEGFR2 via the two LG1/2 domains, whereas the C-terminal LG3 domain, the portion responsible for binding the α2β1 integrin, was ineffective. Endorepellin also induced transcriptional activity of the BECN1 promoter in endothelial cells, and the VEGFR2-specific tyrosine kinase inhibitor, SU5416, blocked this effect. Finally, we found a correlation between endorepellin-evoked inhibition of capillary morphogenesis and enhanced autophagy. Thus, we have identified a new role for this endogenous angiostatic fragment in inducing autophagy through a VEGFR2-dependent but α2β1 integrin-independent pathway. This novel mechanism specifically targets endothelial cells and could represent a promising new strategy to potentiate the angiostatic effect of endorepellin and perhaps other angiostatic matrix proteins.
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Affiliation(s)
- Chiara Poluzzi
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Joshua Casulli
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Atul Goyal
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Thomas J Mercer
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Thomas Neill
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Renato V Iozzo
- From the Department of Pathology, Anatomy, and Cell Biology and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
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Lauten A, Gerhard-Garcia A, Suhr F, Fischer JH, Figulla HR, Bloch W. Impact of ischemia-reperfusion on extracellular matrix processing and structure of the basement membrane of the heart. PLoS One 2014; 9:e92833. [PMID: 24681713 PMCID: PMC3969375 DOI: 10.1371/journal.pone.0092833] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 02/26/2014] [Indexed: 11/18/2022] Open
Abstract
PURPOSE Acute ischemic injury is a strong inductor of cardiac remodelling, resulting in structural changes of the extracellular matrix (ECM) and basement membrane (BM). In a large animal model of ischemia-reperfusion (I/R) we investigated the post-ischemic liberation of the collagen-IV-fragments Tumstatin (TUM; 28 kDa-fragment of collagen-IV-alpha-3), Arresten (ARR; 26 kDa-fragment of collagen-IV-alpha-1) and Endorepellin (LG3, 85 kDa-fragment of perlecan) which are biologically active in angiogenesis and vascularization in the post-ischemic myocardium. METHODS AND RESULTS In this blinded study, 30 pigs were randomized to 60 min of global I/R at either 4°C or 32°C or served as control. Three transmyocardial tissue samples were collected prior to ischemia and within 30 min and 150 min of reperfusion. Tissue content of TUM, ARR and LG3 was analyzed by western blotting and immunostaining. Within 150 min of mild hypothermic I/R a significantly increased tissue content of ARR (0.17±0.14 vs. 0.56±0.56; p = 0.001) and LG3 (1.13±0.34 vs. 2.51±1.71, p<0.001) was observed. In contrast, deep hypothermic I/R was not associated with a significant release of cleavage products. Cleavage of TUM remained unchanged irrespective of temperature. Increased matrix processing following mild hypothermia I/R is further supported by a >11fold elevation of creatine kinase (2075±2595 U/l vs. 23248±6551 U/l; p<0.001) in the coronary sinus plasma samples. Immunostaining demonstrated no changes for ARR and LG3 presentation irrespective of temperature. In contrast, TUM significantly decreased in the BM surrounding cardiomyocytes and capillaries after mild and deep hypothermic I/R, thus representing structural alterations of the BM in these groups. CONCLUSION The study demonstrates an early temperature-dependent processing of Col-IV as major component of the BM of cardiomyocytes and vascular endothelium. These observations support the protective effects of deep hypothermia during I/R. Furthermore, the results suggest an increased structural remodelling of the myocardial basement membrane with potential functional impairment during mild hypothermic I/R which may contribute to the progression to post-ischemic heart failure.
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Affiliation(s)
- Alexander Lauten
- Department of Internal Medicine I (Cardiology, Angiology, Pneumology), Friedrich- Schiller University, Jena, Germany
- Institute of Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
- * E-mail:
| | - Alexandra Gerhard-Garcia
- Institute of Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Frank Suhr
- Institute of Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Juergen H. Fischer
- Institute for Experimental Medicine, University of Cologne, Cologne, Germany
| | - Hans R. Figulla
- Department of Internal Medicine I (Cardiology, Angiology, Pneumology), Friedrich- Schiller University, Jena, Germany
| | - Wilhelm Bloch
- Institute of Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
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Liu XF, Xiang L, FitzGerald DJ, Pastan I. Antitumor effects of immunotoxins are enhanced by lowering HCK or treatment with SRC kinase inhibitors. Mol Cancer Ther 2014; 13:82-9. [PMID: 24145282 PMCID: PMC3947114 DOI: 10.1158/1535-7163.mct-13-0726] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Recombinant immunotoxins (RIT) are agents being developed for cancer treatment. They are composed of an Fv that binds to a cancer cell, fused to a 38-kDa fragment of Pseudomonas exotoxin A. SS1P is a RIT that targets mesothelin, a protein expressed on mesothelioma as well as pancreatic, ovarian, lung, and other cancers. Because the protein tyrosine kinase family regulates a variety of cellular processes and pathways, we hypothesized that tyrosine kinases might regulate susceptibility to immunotoxin killing. To investigate their role, we used siRNAs to lower the level of expression of the 88 known tyrosine kinases. We identified five tyrosine kinases, INSR, HCK, SRC, PDGFRβ, and BMX that enhance the activity of SS1P when their level of expression is lowered by siRNAs. We further investigated the Src family member HCK in this study. Knocking down of SRC slightly increased SS1P killing in A431/H9 cells, but knocking down HCK substantially enhanced killing by SS1P. We investigated the mechanism of enhancement and found that HCK knockdown enhanced SS1P cleavage by furin and lowered levels of Mcl-1 and raised Bax. We then found that Src inhibitors mimic the stimulatory effect of HCK knockdown; both SU6656 and SKI-606 (bosutinib) enhanced immunotoxin killing of mesothelin-expressing cells by SS1P and CD22-expressing cells by HA22 (moxetumomab pasudotox). SU6656 also enhanced the antitumor effects of SS1P and HA22 in mouse xenograft tumor models. Our data suggest that the combination of immunotoxin with tyrosine kinase inhibitors may be an effective way to treat some cancers.
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Affiliation(s)
- Xiu-Fen Liu
- Corresponding Author: Ira Pastan, Laboratory of Molecular Biology, 37 Convent Drive, Room 5106, National Cancer Institute, Bethesda, MD 20892-4264.
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Lord MS, Jung M, Cheng B, Whitelock JM. Transcriptional complexity of the HSPG2 gene in the human mast cell line, HMC-1. Matrix Biol 2013; 35:123-31. [PMID: 24365408 DOI: 10.1016/j.matbio.2013.12.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/12/2013] [Accepted: 12/12/2013] [Indexed: 01/08/2023]
Abstract
The mammalian HSPG2 gene encodes the proteoglycan protein core perlecan, which has important functions in biology including cell adhesion via integrins, binding to the extracellular matrix via various protein-protein interactions and binding of growth factors via the heparan sulfate chains decorating the N-terminal domain I. Here we show that, in the human mast cell line HMC-1, the transcription of this gene results in a population of mRNA that is processed in such a way to provide a relative increase of transcripts corresponding to domain V or the C-terminus compared to transcripts from either domain III or the N-terminal domain I. This paper also presents evidence of splicing of the HSPG2 gene in HMC-1 cells at exons 2/3 and after comparing this sequence with those published in various databases, a model is postulated to explain what might be happening in these cells with regard to the transcription of the HSPG2 gene. As domain V of perlecan contains the α2β1 integrin binding site that modulates angiogenesis, we hypothesize that the transcriptional control of the HSPG2 gene in mast cells to synthesize these transcripts supports their stimulatory and specific role in wound healing and tissue regeneration.
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Affiliation(s)
- Megan S Lord
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - MoonSun Jung
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Bill Cheng
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - John M Whitelock
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
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30
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The localisation of inflammatory cells and expression of associated proteoglycans in response to implanted chitosan. Biomaterials 2013; 35:1462-77. [PMID: 24246646 DOI: 10.1016/j.biomaterials.2013.10.068] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 10/27/2013] [Indexed: 12/11/2022]
Abstract
Implantation of a foreign material almost certainly results in the formation of a fibrous capsule around the implant however, mechanistic events leading to its formation are largely unexplored. Mast cells are an inflammatory cell type known to play a role in the response to material implants, through the release of pro-inflammatory proteases and cytokines from their α-granules following activation. This study examined the in vivo and in vitro response of mast cells to chitosan, through detection of markers known to be produced by mast cells or involved with the inflammatory response. Mast cells, identified as Leder stained positive cells, were shown to be present in response to material implants. Additionally, the mast cell receptor, c-kit, along with collagen, serglycin, perlecan and chondroitin sulphate were detected within the fibrous capsules, where distribution varied between material implants. In conjunction, rat mast cells (RBL-2H3) were shown to be activated following exposure to chitosan as indicated by the release of β-hexosaminidase. Proteoglycan and glycosaminoglycans produced by the cells showed similar expression and localisation when in contact with chitosan to when chemically activated. These data support the role that mast cells play in the inflammatory host response to chitosan implants, where mediators released from their α-granules impact on the formation of a fibrous capsule by supporting the production and organisation of collagen fibres.
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31
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Lau A, Wang S, Jiang J, Haig A, Pavlosky A, Linkermann A, Zhang ZX, Jevnikar AM. RIPK3-mediated necroptosis promotes donor kidney inflammatory injury and reduces allograft survival. Am J Transplant 2013; 13:2805-18. [PMID: 24103001 DOI: 10.1111/ajt.12447] [Citation(s) in RCA: 254] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 06/12/2013] [Accepted: 07/02/2013] [Indexed: 01/25/2023]
Abstract
Kidney transplant injury occurs with ischemia and alloimmunity. Members of the receptor interacting protein kinase family (RIPK1,3) are key regulators of "necroptosis," a newly recognized, regulated form of necrosis. Necroptosis and apoptosis death appear to be counterbalanced as caspase-8 inhibition can divert death from apoptosis to necrosis. Inhibition of necroptosis in donor organs to limit injury has not been studied in transplant models. In this study, necroptosis was triggered in caspase inhibited tubular epithelial cells (TEC) exposed to tumor necrosis factor alpha in vitro, while RIPK1 inhibition with necrostatin-1 or use of RIPK3(-/-) TEC, prevented necroptosis. In vivo, short hairpin RNA silencing of caspase-8 in donor B6 mouse kidneys increased necroptosis, enhanced high-mobility group box 1 release, reduced renal function and accelerated rejection when transplanted into BALB/c recipients. Using ethidium homodimer perfusion to assess necrosis in vivo, necrosis was abrogated in RIPK3(-/-) kidneys postischemia. Following transplantation, recipients receiving RIPK3(-/-) kidneys had longer survival (p = 0.002) and improved renal function (p = 0.03) when compared to controls. In summary, we show for the first time that RIPK3-mediated necroptosis in donor kidneys can promote inflammatory injury, and has a major impact on renal ischemia-reperfusion injury and transplant survival. We suggest inhibition of necroptosis in donor organs may similarly provide a major clinical benefit.
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Affiliation(s)
- A Lau
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada; Department of Pathology, Western University, London, Ontario, Canada
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32
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Pallet N, Sirois I, Bell C, Hanafi LA, Hamelin K, Dieudé M, Rondeau C, Thibault P, Desjardins M, Hebert MJ. A comprehensive characterization of membrane vesicles released by autophagic human endothelial cells. Proteomics 2013; 13:1108-20. [PMID: 23436686 DOI: 10.1002/pmic.201200531] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 12/23/2012] [Accepted: 01/16/2013] [Indexed: 11/10/2022]
Abstract
The stress status of the apoptotic cell can promote phenotypic changes that have important consequences on the immunogenicity of the dying cell. Autophagy is one of the biological processes activated in response to a stressful condition. It is an important mediator of intercellular communications, both by regulating the unconventional secretion of molecules, including interleukin 1β, and by regulating the extracellular release of ATP from early stage apoptotic cells. Additionally, autophagic components can be released in a caspase-dependent manner by serum-starved human endothelial cells that have engaged apoptotic and autophagic processes. The nature and the components of the extracellular vesicles released by dying autophagic cells are not known. In this study, we have identified extracellular membrane vesicles that are released by human endothelial cells undergoing apoptosis and autophagy, and characterized their biochemical, ultrastructural, morphological properties as well as their proteome. These extracellular vesicles differ from classical apoptotic bodies because they do not contain nucleus components and are released independently of Rho-associated, coiled-coil containing protein kinase 1 activation. Instead, they are enriched with autophagosomes and mitochondria and convey various danger signals, including ATP, suggesting that they could be involved in the modulation of innate immunity.
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Affiliation(s)
- Nicolas Pallet
- Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
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33
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Willis CD, Poluzzi C, Mongiat M, Iozzo RV. Endorepellin laminin-like globular 1/2 domains bind Ig3-5 of vascular endothelial growth factor (VEGF) receptor 2 and block pro-angiogenic signaling by VEGFA in endothelial cells. FEBS J 2013; 280:2271-84. [PMID: 23374253 DOI: 10.1111/febs.12164] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/23/2013] [Accepted: 01/28/2013] [Indexed: 11/30/2022]
Abstract
Endorepellin, a processed fragment of perlecan protein core, possesses anti-angiogenic activity by antagonizing endothelial cells. Endorepellin contains three laminin G-like (LG) domains and binds simultaneously to vascular endothelial growth factor receptor 2 (VEGFR2) and α2β1 integrin, resulting in dual receptor antagonism. Treatment of endothelial cells with endorepellin inhibits transcription of VEGFA, the natural ligand for VEGFR2, attenuating the pro-survival and migratory activities of VEGFA/VEGFR2 signaling cascade. Here, we investigated the specific binding site of endorepellin within the ectodomain of VEGFR2. Full-length endorepellin was not capable of displacing VEGFA binding from VEGFR2 and LG3 domain alone did not bind VEGFR2. This suggested different binding mechanisms of the extracellular Ig domains of VEGFR2. Therefore, we hypothesized that endorepellin would bind through its proximal LG1/2 domains to VEGFR2 in a different region than VEGFA. Indeed, we found that LG1/2 did not bind Ig1-3, but did bind with high affinity to Ig3-5, distal to the known VEGFA binding site, i.e. Ig2-3. These results support a role for endorepellin as an allosteric inhibitor of VEGFR2. Moreover, we found that LG1/2 blocked the rapid VEGFA activation of VEGFR2 at Tyr1175 in endothelial cells. In contrast, LG1/2 did not result in actin cytoskeletal disassembly in endothelial cells whereas LG3 alone did induce cytoskeletal collapse. However, LG1/2 did inhibit VEGFA-dependent endothelial migration through fibrillar collagen I. These studies provide a mechanistic understanding of how the different LG domains of endorepellin signal in endothelial cells while serving as a template for protein design of receptor tyrosine kinase antagonists.
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Affiliation(s)
- Chris D Willis
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling, Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
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Surin B, Sachon E, Rougier JP, Steverlynck C, Garreau C, Lelongt B, Ronco P, Piedagnel R. LG3 fragment of endorepellin is a possible biomarker of severity in IgA nephropathy. Proteomics 2012; 13:142-52. [PMID: 23161552 DOI: 10.1002/pmic.201200267] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 09/11/2012] [Accepted: 09/25/2012] [Indexed: 12/18/2022]
Abstract
IgA nephropathy (IgAN), the most common primary glomerulonephritis, is characterized by deposition of IgA in the glomerular mesangium. The diagnosis of IgAN still requires a kidney biopsy that cannot easily be repeated in the same patient during follow-up. Therefore, identification of noninvasive urinary biomarkers would be very useful for monitoring patients with IgAN. We first used bidimensional electrophoresis (2DE) coupled to MALDI-TOF-TOF and Western blot to identify some urinary biomarkers associated with IgAN. Urine of IgAN patients showed an increase of albumin fragments, α-1-antitrypsin and α-1-β-glycoprotein, along with a decrease of a single spot that was identified as the laminin G-like 3 (LG3) fragment of endorepellin. The urinary proteomes of 43 IgAN patients were compared to those of 30 healthy individuals by ELISA. Quantification of LG3 confirmed a significant decrease in the urine of IgAN patients compared to healthy controls, except in ten patients in whom LG3 was increased. These ten patients had a more severe disease with lower glomerular filtration rate values. We found a significant inverse correlation between LG3 levels and glomerular filtration rate in the 43 patients with IgAN, which was not observed in 65 patients with other glomerular diseases including membranous nephropathy (23), lupus nephropathy (13), focal segmental glomerulosclerosis (15), diabetic nephropathy (14), and six patients with nonglomerular diseases. Therefore, we suggest that the LG3 fragment of endorepellin could be associated with IgAN severity and might be related to pathogenesis of IgAN.
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35
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Jung M, Lord MS, Cheng B, Lyons JG, Alkhouri H, Hughes JM, McCarthy SJ, Iozzo RV, Whitelock JM. Mast cells produce novel shorter forms of perlecan that contain functional endorepellin: a role in angiogenesis and wound healing. J Biol Chem 2012; 288:3289-304. [PMID: 23235151 DOI: 10.1074/jbc.m112.387811] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Mast cells are derived from hematopoietic progenitors that are known to migrate to and reside within connective and mucosal tissues, where they differentiate and respond to various stimuli by releasing pro-inflammatory mediators, including histamine, growth factors, and proteases. This study demonstrated that primary human mast cells as well as the rat and human mast cell lines, RBL-2H3 and HMC-1, produce the heparan sulfate proteoglycan, perlecan, with a molecular mass of 640 kDa as well as smaller molecular mass species of 300 and 130 kDa. Utilizing domain-specific antibodies coupled with N-terminal sequencing, it was confirmed that both forms contained the C-terminal module of the protein core known as endorepellin, which were generated by mast cell-derived proteases. Domain-specific RT-PCR experiments demonstrated that transcripts corresponding to domains I and V, including endorepellin, were present; however, mRNA transcripts corresponding to regions of domain III were not present, suggesting that these cells were capable of producing spliced forms of the protein core. Fractions from mast cell cultures that were enriched for these fragments were shown to bind endothelial cells via the α(2)β(1) integrin and stimulate the migration of cells in "scratch assays," both activities of which were inhibited by incubation with either anti-endorepellin or anti-perlecan antibodies. This study shows for the first time that mast cells secrete and process the extracellular proteoglycan perlecan into fragments containing the endorepellin C-terminal region that regulate angiogenesis and matrix turnover, which are both key events in wound healing.
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Affiliation(s)
- Moonsun Jung
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
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36
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Goyal A, Poluzzi C, Willis CD, Smythies J, Shellard A, Neill T, Iozzo RV. Endorepellin affects angiogenesis by antagonizing diverse vascular endothelial growth factor receptor 2 (VEGFR2)-evoked signaling pathways: transcriptional repression of hypoxia-inducible factor 1α and VEGFA and concurrent inhibition of nuclear factor of activated T cell 1 (NFAT1) activation. J Biol Chem 2012; 287:43543-56. [PMID: 23060442 DOI: 10.1074/jbc.m112.401786] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Endorepellin, the angiostatic C-terminal domain of the heparan sulfate proteoglycan perlecan, inhibits angiogenesis by simultaneously binding to the α2β1 integrin and the vascular endothelial growth factor (VEGF) receptor 2 (VEGFR2) on endothelial cells. This interaction triggers the down-regulation of both receptors and the concurrent activation of the tyrosine phosphatase SHP-1, which leads to a signaling cascade resulting in angiostasis. Here, we provide evidence that endorepellin is capable of attenuating both the PI3K/PDK1/Akt/mTOR and the PKC/JNK/AP1 pathways. We show that hypoxia-inducible factor 1α (HIF-1α) transcriptional activity induced by VEGFA was inhibited by endorepellin independent of oxygen concentration and that only a combination of both PI3K and calcineurin inhibitors completely blocked the suppressive activity evoked by endorepellin on HIF1A and VEGFA promoter activity. Moreover, endorepellin inhibited the PKC/JNK/AP1 axis induced by the recruitment of phospholipase γ and attenuated the VEGFA-induced activation of NFAT1, a process dependent on calcineurin activity. Finally, endorepellin inhibited VEGFA-evoked nuclear translocation of NFAT1 and promoted NFAT1 stability. Thus, we provide evidence for a novel downstream signaling axis for an angiostatic fragment and for the key components involved in the dual antagonistic activity of endorepellin, highlighting its potential use as a therapeutic agent.
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Affiliation(s)
- Atul Goyal
- Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
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Sirois I, Groleau J, Pallet N, Brassard N, Hamelin K, Londono I, Pshezhetsky AV, Bendayan M, Hébert MJ. Caspase activation regulates the extracellular export of autophagic vacuoles. Autophagy 2012; 8:927-37. [PMID: 22692030 DOI: 10.4161/auto.19768] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The endothelium plays a central role in the regulation of vascular wall cellularity and tone by secreting an array of mediators of importance in intercellular communication. Nutrient deprivation of human endothelial cells (EC) evokes unconventional forms of secretion leading to the release of nanovesicles distinct from apoptotic bodies and bearing markers of multivesicular bodies (MVB). Nutrient deficiency is also a potent inducer of autophagy and vesicular transport pathways can be assisted by autophagy. Nutrient deficiency induced a significant and rapid increase in autophagic features, as imaged by electron microscopy and immunoblotting analysis of LC3-II/LC3-I ratios. Increased autophagic flux was confirmed by exposing serum-starved cells to bafilomycin A 1. Induction of autophagy was followed by indices of an apoptotic response, as assessed by microscopy and poly (ADP-ribose) polymerase cleavage in absence of cell membrane permeabilization indicative of necrosis. Pan-caspase inhibition with ZVAD-FMK did not prevent the development of autophagy but negatively impacted autophagic vacuole (AV) maturation. Adopting a multidimensional proteomics approach with validation by immunoblotting, we determined that nutrient-deprived EC released AV components (LC3I, LC3-II, ATG16L1 and LAMP2) whereas pan-caspase inhibition with ZVAD-FMK blocked AV release. Similarly, nutrient deprivation in aortic murine EC isolated from CASP3/caspase 3-deficient mice induced an autophagic response in absence of apoptosis and failed to prompt LC3 release. Collectively, the present results demonstrate the release of autophagic components by nutrient-deprived apoptotic human cells in absence of cell membrane permeabilization. These results also identify caspase-3 as a novel regulator of AV release.
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Affiliation(s)
- Isabelle Sirois
- Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
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Saini MG, Bix GJ. Oxygen-glucose deprivation (OGD) and interleukin-1 (IL-1) differentially modulate cathepsin B/L mediated generation of neuroprotective perlecan LG3 by neurons. Brain Res 2011; 1438:65-74. [PMID: 22244880 DOI: 10.1016/j.brainres.2011.12.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 11/24/2011] [Accepted: 12/13/2011] [Indexed: 11/15/2022]
Abstract
Brain extracellular matrix (ECM) is highly degraded after cerebral ischemia. The perlecan c-terminal fragment LG3 is generated at increased levels by proteolytic processing as long as 3 days after ischemia. It has previously been shown that oxygen-glucose deprivation (OGD), reperfusion and interleukin-1 α (IL-1α) stimulate brain cells to yield increased levels of LG3. This LG3, in turn, is neuroprotective against OGD, and may therefore represent one of the brain's defenses against ischemic injury. Here, we investigate whether, in neurons, this increased LG3 is the result of increased perlecan generation and cellular release, increased protease release (to generate LG3 from previous extracellularly deposited perlecan) or both. We found that pre-synthesized perlecan may be exocytosed by neurons during OGD and de novo synthesis of perlecan is increased during reperfusion, even 24 h after OGD. Furthermore, while cathepsin L activity was seen to be marginally important to generate LG3 during normoxic conditions, cathepsin B activity was found to be important to generate increased levels of LG3 following OGD and reperfusion. On the other hand, IL-1α treatment raised levels of cathepsin L in neuronal media, and both cathepsin L and cathepsin B were demonstrated to be important for increasing LG3 levels after IL-1α treatment.
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Affiliation(s)
- Maxim G Saini
- Department of Molecular and Cellular Medicine, Texas A&M College of Medicine, College Station, TX, USA
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Boosani CS, Sudhakar YA. Proteolytically Derived Endogenous Angioinhibitors Originating from the Extracellular Matrix. Pharmaceuticals (Basel) 2011; 4:1551-1577. [PMID: 22267953 PMCID: PMC3260939 DOI: 10.3390/ph4121551] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Angiogenesis, a neovascularization process induced from the existing parent blood vessels, is a prerequisite for many physiological and pathological conditions. Under physiological conditions it is regulated by a balance between endogenous angioinhibitors and angioactivators, and an imbalance between them would lead to pathological conditions such as cancer, age-related macular degeneration (AMD), diabetic retinopathy, cardiovascular diseases, etc. Several proteolytically generated endogenous molecules have been identified which exhibit angioinhibition and/or antitumor activities. These angioinhibitors interact with endothelial and tumor cells by binding to distinct integrins and initiate many of their intracellular signaling mechanisms regulating the cell survival and or apoptotic pathways. The present review will focus on the extracellular matrix derived angioinhibitors, and their mechanisms of actions that point to the clinical significance and therapeutic implications.
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Affiliation(s)
- Chandra Shekhar Boosani
- Cell Signaling, Retinal and Tumor Angiogenesis Laboratory, Department of Genetics, Boys Town National Research Hospital, Omaha, NE 68131, USA; E-Mail:
| | - Yakkanti A. Sudhakar
- Cell Signaling, Retinal and Tumor Angiogenesis Laboratory, Department of Genetics, Boys Town National Research Hospital, Omaha, NE 68131, USA; E-Mail:
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-402-498-6681; Fax: +1-402-498-6331
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Soulez M, Pilon EA, Dieudé M, Cardinal H, Brassard N, Qi S, Wu SJ, Durocher Y, Madore F, Perreault C, Hébert MJ. The perlecan fragment LG3 is a novel regulator of obliterative remodeling associated with allograft vascular rejection. Circ Res 2011; 110:94-104. [PMID: 22076637 DOI: 10.1161/circresaha.111.250431] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Endothelial apoptosis is increased in association with acute and chronic vascular rejection (VR) of solid allografts. Apoptotic endothelial cells (EC) release LG3, a C-terminal fragment of perlecan of potential importance in vascular remodeling and neointima formation. OBJECTIVE Our 2 goals were to determine whether circulating levels of LG3 are increased in association with acute VR of renal allografts and to evaluate the impact of LG3 on vascular remodeling. METHODS AND RESULTS We conducted a case-control study to compare serum LG3 levels in human renal transplant patients with acute VR, tubulo-interstitial rejection (ATIR) and normal graft function. Aorta transplantation between fully MHC-mismatched mice in association with intravenous LG3 injection was used to characterize the impact of LG3 on vascular remodeling. Scratch assays evaluated the promigratory activity of LG3 on vascular smooth muscle cells (VSMC) in vitro. Serum LG3 levels were significantly elevated in human renal transplant patients with acute VR (n = 16) compared to ATIR (n = 16) and normal graft function (n = 32, P = 0.004). In patients with acute VR, graft loss was associated with elevated LG3 levels. Increasing LG3 serum levels in aortic allograft recipients significantly increased neointima formation. LG3 injection fostered accumulation of α-smooth muscle actin-positive cells and decreased the number of CD31 positive EC. LG3 increased the migration of VSMC through extracellular signal-regulated kinases 1/2-dependent pathways. CONCLUSION These results indicate that LG3 is a novel regulator of obliterative vascular remodeling during rejection.
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Affiliation(s)
- Mathilde Soulez
- Research Centre, Centre Hospitalier de l'Université de Montréal, Hôpital Notre Dame and Université de Montréal, Montréal, Quebec, Canada
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The apoptotic program promotes tissue remodeling and fibrosis. Kidney Int 2011; 80:1108; author reply 1108. [DOI: 10.1038/ki.2011.307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Saini MG, Pinteaux E, Lee B, Bix GJ. Oxygen-glucose deprivation and interleukin-1α trigger the release of perlecan LG3 by cells of neurovascular unit. J Neurochem 2011; 119:760-71. [PMID: 21919908 DOI: 10.1111/j.1471-4159.2011.07484.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two of the main stresses faced by cells at the neurovascular unit (NVU) as an immediate result of cerebral ischemia are oxygen-glucose deprivation (OGD)/reperfusion and inflammatory stress caused by up regulation of IL-1. As a result of these stresses, perlecan, an important component of the NVU extracellular matrix, is highly proteolyzed. In this study, we describe that focal cerebral ischemia in rats results in increased generation of laminin globular domain 3 (LG3), the c-terminal bioactive fragment of perlecan. Further, in vitro study of the cells of the NVU was performed to locate the source of this increased perlecan-LG3. Neurons, astrocytes, brain endothelial cells and pericytes were exposed to OGD/reperfusion and IL-1α/β. It was observed that neurons and pericytes showed increased levels of LG3 during OGD in their culture media. During in vitro reperfusion, neurons, astrocytes and pericytes showed elevated levels of LG3, but only after exposure to brief durations of OGD. IL-1α and IL-1β treatment tended to have opposite effects on NVU cells. While IL-1α increased or had minimal to no effect on LG3 generation, high concentrations of IL-1β decreased it in most cells studied. Finally, LG3 was determined to be neuroprotective and anti-proliferative in brain endothelial cells, suggesting a possible role for the generation of LG3 in the ischemic brain.
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Affiliation(s)
- Maxim G Saini
- Department of Molecular and Cellular Medicine, Texas A&M College of Medicine, College Station, Texas 77843, USA
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Iozzo RV, Sanderson RD. Proteoglycans in cancer biology, tumour microenvironment and angiogenesis. J Cell Mol Med 2011; 15:1013-31. [PMID: 21155971 PMCID: PMC3633488 DOI: 10.1111/j.1582-4934.2010.01236.x] [Citation(s) in RCA: 420] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 12/08/2010] [Indexed: 12/12/2022] Open
Abstract
Proteoglycans, key molecular effectors of cell surface and pericellular microenvironments, perform multiple functions in cancer and angiogenesis by virtue of their polyhedric nature and their ability to interact with both ligands and receptors that regulate neoplastic growth and neovascularization. Some proteoglycans such as perlecan, have pro- and anti-angiogenic activities, whereas other proteoglycans, such as syndecans and glypicans, can also directly affect cancer growth by modulating key signalling pathways. The bioactivity of these proteoglycans is further modulated by several classes of enzymes within the tumour microenvironment: (i) sheddases that cleave transmembrane or cell-associated syndecans and glypicans, (ii) various proteinases that cleave the protein core of pericellular proteoglycans and (iii) heparanases and endosulfatases which modify the structure and bioactivity of various heparan sulphate proteoglycans and their bound growth factors. In contrast, some of the small leucine-rich proteoglycans, such as decorin and lumican, act as tumour repressors by physically antagonizing receptor tyrosine kinases including the epidermal growth factor and the Met receptors or integrin receptors thereby evoking anti-survival and pro-apoptotic pathways. In this review we will critically assess the expanding repertoire of molecular interactions attributed to various proteoglycans and will discuss novel proteoglycan functions modulating cancer progression, invasion and metastasis and how these factors regulate the tumour microenvironment.
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Affiliation(s)
- Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson UniversityPhiladelphia, PA, USA
| | - Ralph D Sanderson
- Department of Pathology, and the Comprehensive Cancer Center, University of Alabama at BirminghamBirmingham, AL, USA
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Ahluwalia M, de Groot J, Liu W(M, Gladson CL. Targeting SRC in glioblastoma tumors and brain metastases: rationale and preclinical studies. Cancer Lett 2010; 298:139-49. [PMID: 20947248 PMCID: PMC3212431 DOI: 10.1016/j.canlet.2010.08.014] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 08/22/2010] [Indexed: 12/13/2022]
Abstract
Glioblastoma (GBM) is an extremely aggressive, infiltrative tumor with a poor prognosis. The regulatory approval of bevacizumab for recurrent GBM has confirmed that molecularly targeted agents have potential for GBM treatment. Preclinical data showing that SRC and SRC-family kinases (SFKs) mediate intracellular signaling pathways controlling key biologic/oncogenic processes provide a strong rationale for investigating SRC/SFK inhibitors, e.g., dasatinib, in GBM and clinical studies are underway. The activity of these agents against solid tumors suggests that they may also be useful in treating brain metastases. This article reviews the potential for using SRC/SFK inhibitors to treat GBM and brain metastases.
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Affiliation(s)
- Manmeet Ahluwalia
- Cleveland Clinic Main Campus, Mail Code ND40, 9500 Euclid Avenue, Cleveland, OH 44195, Phone: 216-444-6145
| | - John de Groot
- The Brain Tumor Center, The University of Texas, M.D. Anderson Cancer Center, 1515, Holcombe Blvd., Unit 431, Houston, TX 77030, Phone: 713-792-7255
| | - Wei (Michael) Liu
- Lerner Research Institute, Department of Cancer Biology, Cleveland Clinic Mail Code NB40, 9500 Euclid Avenue, Cleveland, OH 44195, Phone: 216-636-9494
| | - Candece L Gladson
- Lerner Research Institute, Department of Cancer Biology, Cleveland Clinic Mail Code NB40, 9500 Euclid Avenue, Cleveland, OH 44195, Phone: 216-636-9493, Fax: 216-445-6269
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Sirois I, Raymond MA, Brassard N, Cailhier JF, Fedjaev M, Hamelin K, Londono I, Bendayan M, Pshezhetsky AV, Hébert MJ. Caspase-3-dependent export of TCTP: a novel pathway for antiapoptotic intercellular communication. Cell Death Differ 2010; 18:549-62. [PMID: 20966960 DOI: 10.1038/cdd.2010.126] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The apoptotic program incorporates a paracrine component of importance in fostering tissue repair at sites of apoptotic cell deletion. As this paracrine pathway likely bears special importance in maladaptive intercellular communication leading to vascular remodeling, we aimed at further defining the mediators produced by apoptotic endothelial cells (EC), using comparative and functional proteomics. Apoptotic EC were found to release nanovesicles displaying ultrastructural characteristics, protein markers and functional activity that differed from apoptotic blebs. Tumor susceptibility gene 101 and translationally controlled tumor protein (TCTP) were identified in nanovesicle fractions purified from medium conditioned by apoptotic EC and absent from purified apoptotic blebs. Immunogold labeling identified TCTP on the surface of nanovesicles purified from medium conditioned by apoptotic EC and within multivesicular blebs in apoptotic EC. These nanovesicles induced an extracellular signal-regulated kinases 1/2 (ERK 1/2)-dependent antiapoptotic phenotype in vascular smooth muscle cells (VSMC), whereas apoptotic blebs did not display antiapoptotic activity on VSMC. Caspase-3 biochemical inhibition and caspase-3 RNA interference in EC submitted to a proapoptotic stimulus inhibited the release of nanovesicles. Also, TCTP siRNAs in EC attenuated the antiapoptotic activity of purified nanovesicles on VSMC. Collectively, these results identify TCTP-bearing nanovesicles as a novel component of the paracrine apoptotic program of potential importance in vascular repair.
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Affiliation(s)
- I Sirois
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), 1560 rue Sherbrooke Est, Montréal, Quebec, Canada
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47
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Soulez M, Sirois I, Brassard N, Raymond MA, Nicodème F, Noiseux N, Durocher Y, Pshezhetsky AV, Hébert MJ. Epidermal growth factor and perlecan fragments produced by apoptotic endothelial cells co-ordinately activate ERK1/2-dependent antiapoptotic pathways in mesenchymal stem cells. Stem Cells 2010; 28:810-20. [PMID: 20201065 DOI: 10.1002/stem.403] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mounting evidence indicates that mesenchymal stem cells (MSC) are pivotal to vascular repair and neointima formation in various forms of vascular disease. Yet, the mechanisms that allow MSC to resist apoptosis at sites where other cell types, such as endothelial cells (EC), are dying are not well defined. In the present work, we demonstrate that apoptotic EC actively release paracrine mediators which, in turn, inhibit apoptosis of MSC. Serum-free medium conditioned by apoptotic EC increases extracellular signal-regulated kinases 1 and 2 (ERK1/2) activation and inhibits apoptosis (evaluated by Bcl-xL protein levels and poly (ADP-ribose) polymerase cleavage) of human MSC. A C-terminal fragment of perlecan (LG3) released by apoptotic EC is one of the mediators activating this antiapoptotic response in MSC. LG3 interacts with beta1-integrins, which triggers downstream ERK1/2 activation in MSC, albeit to a lesser degree than medium conditioned by apoptotic EC. Hence, other mediators released by apoptotic EC are probably required for induction of the full antiapoptotic phenotype in MSC. Adopting a comparative proteomic strategy, we identified epidermal growth factor (EGF) as a novel mediator of the paracrine component of the endothelial apoptotic program. LG3 and EGF cooperate in triggering beta1-integrin and EGF receptor-dependent antiapoptotic signals in MSC centering on ERK1/2 activation. The present work, providing novel insights into the mechanisms facilitating the survival of MSC in a hostile environment, identifies EGF and LG3 released by apoptotic EC as central antiapoptotic mediators involved in this paracrine response.
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Affiliation(s)
- Mathilde Soulez
- Centre de recherche, Centre hospitalier de l'Université de Montréal - Hôpital Notre-Dame, Université de Montréal, Montreal, QC, Canada
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48
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Laplante P, Sirois I, Raymond MA, Kokta V, Béliveau A, Prat A, Pshezhetsky AV, Hébert MJ. Caspase-3-mediated secretion of connective tissue growth factor by apoptotic endothelial cells promotes fibrosis. Cell Death Differ 2009; 17:291-303. [DOI: 10.1038/cdd.2009.124] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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Iozzo RV, Zoeller JJ, Nyström A. Basement membrane proteoglycans: modulators Par Excellence of cancer growth and angiogenesis. Mol Cells 2009; 27:503-13. [PMID: 19466598 PMCID: PMC6712562 DOI: 10.1007/s10059-009-0069-0] [Citation(s) in RCA: 171] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Accepted: 04/25/2009] [Indexed: 01/13/2023] Open
Abstract
Proteoglycans located in basement membranes, the nanostructures underling epithelial and endothelial layers, are unique in several respects. They are usually large, elongated molecules with a collage of domains that share structural and functional homology with numerous extracellular matrix proteins, growth factors and surface receptors. They mainly carry heparan sulfate side chains and these contribute not only to storing and preserving the biological activity of various heparan sulfate-binding cytokines and growth factors, but also in presenting them in a more "active configuration" to their cognate receptors. Abnormal expression or deregulated function of these proteoglycans affect cancer and angiogenesis, and are critical for the evolution of the tumor microenvironment. This review will focus on the functional roles of the major heparan sulfate proteoglycans from basement membrane zones: perlecan, agrin and collagen XVIII, and on their roles in modulating cancer growth and angiogenesis.
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Affiliation(s)
- Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
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50
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Whitelock JM, Melrose J, Iozzo RV. Diverse cell signaling events modulated by perlecan. Biochemistry 2008; 47:11174-83. [PMID: 18826258 DOI: 10.1021/bi8013938] [Citation(s) in RCA: 207] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Perlecan is a ubiquitous pericellular proteoglycan ideally placed to mediate cell signaling events controlling migration, proliferation, and differentiation. Its control of growth factor signaling usually involves interactions with the heparan sulfate chains covalently coupled to the protein core's N-terminus. However, this modular protein core also binds with relatively high affinity to a number of growth factors and surface receptors, thereby stabilizing cell-matrix links. This review will focus on perlecan-growth factor interactions and describe recent advances in our understanding of this highly conserved proteoglycan during development, cancer growth, and angiogenesis. The pro-angiogenic capacities of perlecan that involve proliferative and migratory signals in response to bound growth factors will be explored, as well as the anti-angiogenic signals resulting from interactions between the C-terminal domain known as endorepellin and integrins that control adhesion of cells to the extracellular matrix. These two somewhat diametrically opposed roles will be discussed in light of new data emerging from various fields which converge on perlecan as a key regulator of cell growth and angiogenesis.
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Affiliation(s)
- John M Whitelock
- Graduate School of Biomedical Engineering, University of New South Wales, Kensington, Australia
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