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Kim SJ, Lee SE, Kim YI, Nam-Goong IS, Jung HW, Kim ES. Papillary thyroid cancer with Hashimoto’s thyroiditis attenuates the tumour aggressiveness through the up-regulation of E-cadherin and TGF-β expression. Clin Exp Med 2022:10.1007/s10238-022-00857-6. [DOI: 10.1007/s10238-022-00857-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 06/20/2022] [Indexed: 11/03/2022]
Abstract
AbstractHuman papillary thyroid cancer (PTC) is often associated with Hashimoto’s thyroiditis (HT), and their coexistence improves the prognosis of PTC. Aim of the study. The objective of our study is to investigate the expression of cadherins and TGF-β which are regulators in the tumour aggressiveness with metastatic spread in PTC patients and its relationship with HT. The expression of E-cadherin and N-cadherin was measured in thyroid tissues of healthy volunteers and PTC patients with HT (PTC/HT) or without. The E-cadherin expression was also determined in thyroid cancer cells (TPC1, SNU373, SNU790, 8505C, CAL62, and FTC133). Cell migration was measured by wound healing assay. The expression of N-cadherin, ICAM1, and TGF-β was measured in thyroid tissues and plasma. The E-cadherin expression was significantly increased in PTC/HT patients compared with PTC alone. Meanwhile, the N-cadherin expression was significantly decreased in PTC/HT patients. The E-cadherin expression was only observed in FTC cells, and the overexpression of E-cadherin inhibited cancer cell migration. The TGF-β expression was significantly increased in PTC/HT patients, and the plasma levels were higher in PTC/HT patients than in PTC alone. The expression of N-cadherin and ICAM-1 was significantly decreased in PTC/HT patients. Our results indicate that the expression of E-cadherin and TGF-β was higher in PTC/HT patients than in PTC alone. This suggests that the presence of PTC with HT may attenuate the tumour aggressiveness and metastasis through the up-regulation of E-cadherin and TGF-β expression.
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Popa M, Hecker M, Wagner AH. Inverse Regulation of Confluence-Dependent ADAMTS13 and von Willebrand Factor Expression in Human Endothelial Cells. Thromb Haemost 2021; 122:611-622. [PMID: 34352896 DOI: 10.1055/s-0041-1733800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13) is a zinc-containing metalloprotease also known as von Willebrand factor (vWF)-cleaving protease. Low ADAMTS13 plasma levels are associated with an increased risk of arterial thrombosis, including myocardial infarction and cerebrovascular disease. The expression and regulation of this metalloprotease in human endothelial cells have not been systematically investigated. In this study, we demonstrate that ADAMTS13 expression is inhibited by proinflammatory cytokines tumor necrosis factor-α and interferon-γ as well as by CD40 ligand, which was hitherto unknown. Factors protecting against atherosclerosis such as exposure to continuous unidirectional shear stress, interleukin-10, or different HMG-CoA reductase inhibitors like, e.g., simvastatin, atorvastatin, or rosuvastatin, did not influence ADAMTS13 expression. Unidirectional periodic orbital shear stress, mimicking oscillatory flow conditions found at atherosclerosis-prone arterial bifurcations, had also no effect. In contrast, a reciprocal correlation between ADAMTS13 and vWF expression in endothelial cells depending on the differentiation state was noted. ADAMTS13 abundance significantly rose on both the mRNA and intracellular protein level and also tethered to the endothelial glycocalyx with the degree of confluency while vWF protein levels were highest in proliferating cells but significantly decreased upon reaching confluence. This finding could explain the anti-inflammatory and antithrombotic phenotype of dormant endothelial cells mediated by contact inhibition.
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Affiliation(s)
- Miruna Popa
- Division of Cardiovascular Physiology, Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Markus Hecker
- Division of Cardiovascular Physiology, Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Andreas H Wagner
- Division of Cardiovascular Physiology, Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
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3
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Chen X, Zhang S, Du K, Zheng N, Liu Y, Chen H, Xie G, Ma Y, Zhou Y, Zheng Y, Zeng L, Yang J, Shen L. Gastric cancer-secreted exosomal X26nt increases angiogenesis and vascular permeability by targeting VE-cadherin. Cancer Sci 2021; 112:1839-1852. [PMID: 33205567 PMCID: PMC8088954 DOI: 10.1111/cas.14740] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/12/2020] [Accepted: 11/14/2020] [Indexed: 12/21/2022] Open
Abstract
Angiogenesis is closely associated with tumorigenesis, invasion, and metastasis by providing oxygen and nutrients. Recently, increasing evidence indicates that cancer-derived exosomes which contain proteins, coding, and noncoding RNAs (ncRNAs) were shown to have proangiogenic function in cancer. A 26-nt-long ncRNA (X26nt) is generated in the process of inositol-requiring enzyme 1 alpha (IRE1α)-induced unspliced XBP1 splicing. However, the role of X26nt in the angiogenesis of gastric cancer (GC) remains largely unknown. In the present study, we found that X26nt was significantly elevated in GC and GC exosomes. Then, we verified that X26nt could be delivered into human umbilical vein endothelial cells (HUVECs) via GC cell exosomes and promote the proliferation, migration, and tube formation of HUVECs. We revealed that exosomal X26nt decreased vascular endothelial cadherin (VE-cadherin) by directly combining the 3'UTR of VE-cadherin mRNA in HUVECs, thereby increasing vascular permeability. We further demonstrated that X26nt accelerates the tumor growth and angiogenesis in a mouse subcutaneous tumor model. Our findings investigate a unique intercellular communication mediated by cancer-derived exosomes and reveal a novel mechanism of exosomal X26nt in the regulation of tumor vasculature.
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Affiliation(s)
- Xiaocui Chen
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Shuqiong Zhang
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Kun Du
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Naisheng Zheng
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yi Liu
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Hui Chen
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Guohua Xie
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yanhui Ma
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yunlan Zhou
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yingxia Zheng
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Lingfang Zeng
- School of Cardiovascular Medicine and SciencesKing's College – London British Heart Foundation Centre of ExcellenceFaculty of Life Science and MedicineKing's College LondonLondonUK
| | - Junyao Yang
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Lisong Shen
- Department of Clinical LaboratoryXinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Faculty of Medical Laboratory SciencesShanghai Jiao Tong University School of MedicineShanghaiChina
- Xin Hua Children's HospitalShanghaiChina
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4
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Park JH, Shin HH, Rhyu HS, Kim SH, Jeon ES, Lim BK. Vascular Endothelial Integrity Affects the Severity of Enterovirus-Mediated Cardiomyopathy. Int J Mol Sci 2021; 22:3053. [PMID: 33802680 PMCID: PMC8002520 DOI: 10.3390/ijms22063053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 12/22/2022] Open
Abstract
Coxsackievirus and adenovirus receptor (CAR) is present in epithelial and vascular endothelial cell junctions. We have previously shown a hemorrhagic phenotype in germ-line CAR knock-out mouse embryos; we have also found that CAR interacts with ZO-1 and β-catenin. However, the role of CAR in vascular endothelial junction permeability has not been proven. To understand the roles of CAR in the vascular endothelial junctions, we generated endothelium-specific CAR knockout (CAR-eKO) mice. In the absence of CAR, the endothelial cell layer showed an increase in transmembrane electrical resistance (TER, Ω) and coxsackievirus permeability. Evans blue dye and 70 kDa dextran-FITC were delivered by tail vein injection. We observed increased vascular permeability in the hearts of adult CAR-eKO mice compare with wild-type (WT) mice. There was a marked increase in monocyte and macrophage penetration into the peritoneal cavity caused by thioglycolate-induced peritonitis. We found that CAR ablation in endothelial cells was not significantly increased coxsackievirus B3 (CVB3) induced myocarditis in murine model. However, tissue virus titers were significantly higher in CAR-eKO mice compared with WT. Moreover, CVB3 was detected in the brain of CAR-eKO mice. Endothelial CAR deletion affects the expression of major endothelial junction proteins, such as cadherin and platelet endothelial cell adhesion molecule-1 (PECAM-1) in the cultured endothelial cells as well as liver vessel. We suggest that CAR expression is required for normal vascular permeability and endothelial tight junction homeostasis. Furthermore, CVB3 organ penetration and myocarditis severities were dependent on the endothelial CAR level.
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Affiliation(s)
- Jin-Ho Park
- Department of Biomedical Science, Jungwon University, 85 Munmu-ro, Goesan-eup, Goesan-gun, Chungbuk 28024, Korea; (J.-H.P.); (H.-H.S.); (H.-S.R.); (S.-H.K.)
| | - Ha-Hyeon Shin
- Department of Biomedical Science, Jungwon University, 85 Munmu-ro, Goesan-eup, Goesan-gun, Chungbuk 28024, Korea; (J.-H.P.); (H.-H.S.); (H.-S.R.); (S.-H.K.)
| | - Hyun-Seung Rhyu
- Department of Biomedical Science, Jungwon University, 85 Munmu-ro, Goesan-eup, Goesan-gun, Chungbuk 28024, Korea; (J.-H.P.); (H.-H.S.); (H.-S.R.); (S.-H.K.)
| | - So-Hee Kim
- Department of Biomedical Science, Jungwon University, 85 Munmu-ro, Goesan-eup, Goesan-gun, Chungbuk 28024, Korea; (J.-H.P.); (H.-H.S.); (H.-S.R.); (S.-H.K.)
| | - Eun-Seok Jeon
- Division of Cardiology, Samsung Medical Center, Sungkyunkwan University School of Medicine 50 Irwon dong, Gangnam-gu, Seoul 06351, Korea;
| | - Byung-Kwan Lim
- Department of Biomedical Science, Jungwon University, 85 Munmu-ro, Goesan-eup, Goesan-gun, Chungbuk 28024, Korea; (J.-H.P.); (H.-H.S.); (H.-S.R.); (S.-H.K.)
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5
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Cerquetti L, Bucci B, Raffa S, Amendola D, Maggio R, Lardo P, Petrangeli E, Torrisi MR, Toscano V, Pugliese G, Stigliano A. Effects of Sorafenib, a Tyrosin Kinase Inhibitor, on Adrenocortical Cancer. Front Endocrinol (Lausanne) 2021; 12:667798. [PMID: 34108938 PMCID: PMC8183165 DOI: 10.3389/fendo.2021.667798] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 03/29/2021] [Indexed: 11/24/2022] Open
Abstract
The lack of an effective medical treatment for adrenocortical carcinoma (ACC) has prompted the search for better treatment protocols for ACC neoplasms. Sorafenib, a tyrosine kinase inhibitor has exhibited effectiveness in the treatment of different human tumors. Therefore, the aim of this study was to understand the mechanism through which sorafenib acts on ACC, especially since treatment with sorafenib alone is sometimes unable to induce a long-lasting antiproliferative effect in this tumor type. The effects of sorafenib were tested on the ACC cell line H295R by evaluating cell viability, apoptosis and VEGF receptor signaling which was assessed by analyzing VE-cadherin and β-catenin complex formation. We also tested sorafenib on an in vitro 3D cell culture model using the same cell line. Apoptosis was observed after sorafenib treatment, and coimmunoprecipitation data suggested that the drug prevents formation VEGFR-VE-cadherin and β-catenin proteins complex. These results were confirmed both by ultrastructural analysis and by a 3D model where we observed a disaggregation of spheres into single cells, which is a crucial event that represents the first step of metastasis. Our findings suggest that although sorafenib induces apoptotic cell death a small portion of cells survive the treatment and have characteristics of a malignancy. Based on our data we recommend against the use of sorafenib in patients with ACC.
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Affiliation(s)
- Lidia Cerquetti
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Barbara Bucci
- Clinic Pathology Unit, San Pietro Hospital Fatebenefratelli, Rome, Italy
| | - Salvatore Raffa
- Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Donatella Amendola
- Clinic Pathology Unit, San Pietro Hospital Fatebenefratelli, Rome, Italy
| | - Roberta Maggio
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Pina Lardo
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Elisa Petrangeli
- Department of Molecular Medicine Rome, Sapienza University of Rome, Rome, Italy
| | - Maria Rosaria Torrisi
- Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Vincenzo Toscano
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Giuseppe Pugliese
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
| | - Antonio Stigliano
- Endocrinology, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital Rome, Sapienza University of Rome, Rome, Italy
- *Correspondence: Antonio Stigliano,
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Swami P, Thiyagarajan S, Vidger A, Indurthi VSK, Vetter SW, Leclerc E. RAGE Up-Regulation Differently Affects Cell Proliferation and Migration in Pancreatic Cancer Cells. Int J Mol Sci 2020; 21:E7723. [PMID: 33086527 PMCID: PMC7589276 DOI: 10.3390/ijms21207723] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/15/2020] [Accepted: 10/15/2020] [Indexed: 12/16/2022] Open
Abstract
The receptor for advanced glycation end products (RAGE) contributes to many cellular aspects of pancreatic cancer including cell proliferation, migration, and survival. Studies have shown that RAGE activation by its ligands promotes pancreatic tumor growth by stimulating both cell proliferation and migration. In this study, we investigated the effect of RAGE up-regulation on the proliferation and migration of the human pancreatic cancer Panc-1 cell-line. We show that moderate overexpression of RAGE in Panc-1 cells results in increased cell proliferation, but decreased cell migration. The observed cellular changes were confirmed to be RAGE-specific and reversible by using RAGE-specific siRNAs and the small molecule RAGE inhibitor FPS-ZM1. At the molecular level, we show that RAGE up-regulation was associated with decreased activity of FAK, Akt, Erk1/2, and NF-κB signaling pathways and greatly reduced levels of α2 and β1 integrin expression, which is in agreement with the observed decreases in cell migration. We also demonstrate that RAGE up-regulation changes the expression of key molecular markers of epithelial-to-mesenchymal transition (EMT). Our results suggest that in the absence of stimulation by external ligands, RAGE up-regulation can differently modulate cell proliferation and migration in pancreatic cancer cells and regulates partly EMT.
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Affiliation(s)
| | | | | | | | | | - Estelle Leclerc
- Department of Pharmaceutical Sciences, College of Health Professions, North Dakota State University, Fargo, ND 58105, USA; (P.S.); (S.T.); (A.V.); (V.S.K.I.); (S.W.V.)
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7
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Nik ME, Momtazi-Borojeni AA, Zamani P, Navashenaq JG, Iranshahi M, Jaafari MR, Malaekeh-Nikouei B. Targeted-nanoliposomal combretastatin A4 (CA-4) as an efficient antivascular candidate in the metastatic cancer treatment. J Cell Physiol 2019; 234:14721-14733. [PMID: 30697744 DOI: 10.1002/jcp.28230] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 01/03/2019] [Accepted: 01/10/2019] [Indexed: 01/24/2023]
Abstract
A number of antiangiogenic drugs have been approved by the Food and Drug Administration which are used in cancer therapy, and variety of other agents in several stages of clinical development or in preclinical assessment. Among these, combretastatin A4 (CA-4) is an under-researched inhibitor of angiogenesis that shows potential activity in the treatment of advanced tumors with migration capacity. However, its clinical application has been limited due to poor water solubility, low bioavailability, rapid metabolism, and systemic elimination. During the last decade, numerous investigations have been done to overcome these problems by using different CA-4 delivery systems or developing produgs of CA-4 or its structural analogs. Nevertheless, these strategies could not be efficient out of the undesired side effects on normal tissues. Nanoliposomal CA-4 not only benefits from the advantage of using liposomal drugs as opposed to free drugs but also can accumulate in the tumor site via specific targeting ligands, which leads to efficient targeting and enhancement of bioavailability. To the best of our knowledge, we consider an important attempt to understand different factors that might influence the CA-4 loading and release pattern of liposomes and the consequent results in tumor therapy. In this review, we shed light on various studied liposomal CA-4 formulations showing application thereof in cancer treatment.
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Affiliation(s)
- Maryam Ebrahimi Nik
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Abbas Momtazi-Borojeni
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Parvin Zamani
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jamshid Gholizadeh Navashenaq
- Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Immunogenetic and Cell Culture, Immunology Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehrdad Iranshahi
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmoud Reza Jaafari
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pharmaceutical Nanotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Bizhan Malaekeh-Nikouei
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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8
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Li R, Li L, Liu Y, Tang Y, Zhang R. VE-cadherin regulates migration inhibitory factor synthesis and release. Inflamm Res 2019; 68:877-887. [PMID: 31342095 DOI: 10.1007/s00011-019-01270-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 07/09/2019] [Accepted: 07/10/2019] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVE Vascular endothelial (VE)-cadherin-mediated adherens junction is critical to maintain endothelial integrity. Besides its role of homophilic intercellular adhesion, VE-cadherin also has a role of outside-in signaling with functional consequences for vascular physiology. However, the nature of these signals remains not completely understood. MATERIALS AND METHODS Human umbilical vein endothelial cells (HUVECs) were used in cell culture experiments. Confluent HUVECs were treated with VE-cadherin function-blocking antibodies BV9 (50 μg/ml) or IgG control. Antibody array was used to screen for cytokine/chemokine in supernatant. For VE-cadherin knockdown, siRNA transfection was used. ELISA, Western blot, and qRT-PCR were used to confirm the expression of screened cytokine/chemokine. To explore the possible mechanisms, Scr phosphorylation was detected and Scr inhibitor PP2 (1 μM) was used. To investigate in vivo relevance of the findings, BV9 and the indicated neutralizing antibodies were injected into mice and then lung vascular leak and inflammation were examined by Evans blue assay and lung tissue H&E, respectively. RESULTS Using a non-biased, high-throughout human cytokine/chemokine antibody array, we first found that disruption of VE-cadherin-mediated adhesion by function-blocking antibody BV9 triggered the release of migration inhibitory factor (MIF). This VE-cadherin-mediated release of MIF further confirmed by ELISA with both VE-cadherin blocking antibody and siRNA technique was due to enhanced expression of MIF mRNA, which was mediated by Src kinase activation. In addition, in vivo lung vascular leak induced by VE-cadherin function-blocking antibody was partly alleviated by neutralizing MIF. CONCLUSIONS VE-cadherin regulates MIF synthesis and release via Src kinase. Our data provide additional evidence to the concept that VE-cadherin transfers intracellular signals to coordinate the state of cell-cell adhesion with gene expression.
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Affiliation(s)
- Ranran Li
- Department of Critical Care Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Lei Li
- Department of Critical Care Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yiyun Liu
- Department of Critical Care Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yaoqing Tang
- Department of Critical Care Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Ruyuan Zhang
- Department of Critical Care Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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Huang J, Mathew R. Loss of cavin1 and expression of p-caveolin-1 in pulmonary hypertension: Possible role in neointima formation. World J Hypertens 2019; 9:17-29. [DOI: 10.5494/wjh.v9.i2.17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/08/2019] [Accepted: 03/12/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pulmonary hypertension (PH) is a progressive disease with a high morbidity and mortality rate; and neointima formation leads to the irreversibility of the disease. We have previously reported that in rats, monocrotaline (MCT) injection leads to progressive disruption of endothelial cells (EC), and endothelial caveolin-1 (cav-1) loss, accompanied by the activation of pro-proliferative pathways leading to PH. Four weeks post-MCT, extensive endothelial cav-1 loss is associated with increased cav-1 expression in smooth muscle cells (SMC). Exposing the MCT-treated rats to hypoxia hastens the disease process; and at 4 wk, neointimal lesions and occlusion of the small arteries are observed.
AIM To identify the alterations that occur during the progression of PH that lead to neointima formation.
METHODS Male Sprague-Dawley rats (150-175 g) were divided in 4 groups (n = 6-8 per group): controls (C); MCT (M, a single sc injection 40 mg/kg); Hypoxia (H, hypobaric hypoxia); MCT + hypoxia (M+H, MCT-injected rats subjected to hypobaric hypoxia starting on day1). Four weeks later, right ventricular systolic pressure (RVSP), right ventricular hypertrophy (RVH), lung histology, and cav-1 localization using immunofluorescence technique were analyzed. In addition, the expression of cav-1, tyrosine 14 phosphorylated cav-1 (p-cav-1), caveolin-2 (cav-2), cavin-1, vascular endothelial cadherin (VE-Cad) and p-ERK1/2 in the lungs were examined, and the results were compared with the controls.
RESULTS Significant PH and right ventricular hypertrophy were present in M and H groups [RVSP, mmHg, M 54±5*, H 45±2*, vs C 20±1, P < 0.05; RVH, RV/LV ratio M 0.57±0.02*, H 0.50±0.03*, vs C 0.23±0.007, P < 0.05]; with a further increase in M+H group [RVSP 69±9 mmHg, RV/LV 0.59±0.01 P < 0.05 vs M and H]. All experimental groups revealed medial hypertrophy; but only M+H group exhibited small occluded arteries and neointimal lesions. Immunofluorescence studies revealed endothelial cav-1 loss and increased cav-1 expression in SMC in M group; however, the total cav-1 level in the lungs remained low. In the M+H group, significant endothelial cav-1 loss was associated with increasing expression of cav-1 in SMC; resulting in near normalization of cav-1 levels in the lungs [cav-1, expressed as % control, C 100±0, M 22±4*, H 96±7, M+H 77±6, * = P < 0.05 vs C]. The expression of p-cav-1 was observed in M and M+H groups [M 314±4%, M+H 255±22% P < 0.05 vs C]. Significant loss of cav-2 [% control, C 100±0, M 15±1.4*, H 97±7, M+H 15±2*; M and M+H vs C, * = P < 0.05], cavin-1 [% control, C 100±0, M 20±3*, H 117±7, M+H 20±4*; M and M+H vs C, P < 0.05] and VE-Cad [% control, C 100±0, M 17±4*, H 96±9, M+H 8±3*; M and M+H vs C, P < 0.05] was present in M and M+H groups, confirming extensive disruption of EC. Hypoxia alone did not alter the expression of cav-1 or cav-1 related proteins. Expression of p-ERK1/2 was increased in all 3 PH groups [%control, C 100±0, M 284±23*, H 254±25*, M+H 270±17*; * = P < 0.05 vs C].
CONCLUSION Both cavin-1 loss and p-cav-1 expression are known to facilitate cell migration; thus, these alterations may in part play a role in neointima formation in PH.
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Affiliation(s)
- Jing Huang
- Department of Pediatrics, New York Medical College, Valhalla, NY 10595, United States
| | - Rajamma Mathew
- Department of Pediatrics, New York Medical College, Valhalla, NY 10595, United States
- Department of Physiology, New York Medical College, Valhalla, NY 10595, United States
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10
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Sulkowska M, Famulski W, Wincewicz A, Moniuszko T, Kedra B, Koda M, Zalewski B, Baltaziak M, Sulkowski S. Levels of Ve-Cadherin Increase Independently of Vegf in Preoperative Sera of Patients with Colorectal Cancer. TUMORI JOURNAL 2018; 92:67-71. [PMID: 16683386 DOI: 10.1177/030089160609200111] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AIMS AND BACKGROUND Vascular endothelial cadherin (VE-cadherin) preserves the tightness of the mature vascular network as a component of endothelial adherens junctions. Vascular endothelial growth factor (VEGF) makes VE-cadherin dissociate from complexes with beta-catenin, so that endothelial cells can loosely proliferate and migrate. We searched for relationships between VEGF and VE-cadherin levels in preoperative sera of patients with colorectal cancer (CRC). We also compared VE-cadherin levels of control and preoperative CRC sera in relation to clinicopathological features. METHODS We measured with an ELISA kit the serum levels of the proteins in preoperative samples from 125 CRC patients and in samples from 16 healthy volunteers. RESULTS Serum VE-cadherin was about fourfold higher in CRC patients than in controls (P < 0.00001), with similar results being found in subgroups with different clinicopathological features versus controls. VE-cadherin was not correlated with VEGF in the entire group of CRC patients nor in the subgroups of node-positive and node-negative patients, different grades of histological differentiation (G2 or G3), extent of tumor growth (pT1+pT2 or pT3+pT4), histopathological type (adenocarcinoma or mucinous carcinoma), sex, age, and tumor site (colon or rectum). However, the serum levels of VE-cadherin and VEGF in CRC patients, which were higher than the mean values of controls, tended towards a negative correlation in node-positive patients (P = 0.078, r = -0.279). CONCLUSIONS VEGF and VE-cadherin seem to be independent markers of angiogenesis in CRC with no significant correlation between their serum levels.
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Affiliation(s)
- Mariola Sulkowska
- Department of Pathology, Collegium Pathologicum, Medical University of Bialystok, Bialystok, Poland.
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11
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12
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Samuel S, Ahmad RE, Ramasamy TS, Karunanithi P, Naveen SV, Kamarul T. Platelet-rich concentrate in serum-free medium enhances cartilage-specific extracellular matrix synthesis and reduces chondrocyte hypertrophy of human mesenchymal stromal cells encapsulated in alginate. Platelets 2017; 30:66-74. [PMID: 29090639 DOI: 10.1080/09537104.2017.1371287] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Platelet-rich concentrate (PRC), used in conjunction with other chondroinductive growth factors, have been shown to induce chondrogenesis of human mesenchymal stromal cells (hMSC) in pellet culture. However, pellet culture systems promote cell hypertrophy and the presence of other chondroinductive growth factors in the culture media used in previous studies obscures accurate determination of the effect of platelet itself in inducing chondrogenic differentiation. Hence, this study aimed to investigate the effect of PRC alone in enhancing the chondrogenic differentiation potential of human mesenchymal stromal cells (hMSC) encapsulated in three-dimensional alginate constructs. Cells encapsulated in alginate were cultured in serum-free medium supplemented with only 15% PRC. Scanning electron microscopy was used to determine the cell morphology. Chondrogenic molecular signature of hMSCs was determined by quantitative real-time PCR and verified at protein levels via immunohistochemistry and enzyme-linked immunosorbent assay. Results showed that the cells cultured in the presence of PRC for 24 days maintained a chondrocytic phenotype and demonstrated minimal upregulation of cartilaginous extracellular matrix (ECM) marker genes (SOX9, TNC, COL2, ACAN, COMP) and reduced expression of chondrocyte hypertrophy genes (Col X, Runx2) compared to the standard chondrogenic medium (p < 0.05). PRC group had correspondingly higher levels of glycosaminoglycan and increased concentration of chondrogenic specific proteins (COL2, ACAN, COMP) in the ECM. In conclusion, PRC alone appears to be very potent in inducing chondrogenic differentiation of hMSCs and offers additional benefit of suppressing chondrocyte hypertrophy, rendering it a promising approach for providing abundant pool of chondrogenic MSCs for application in cartilage tissue engineering.
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Affiliation(s)
- Shani Samuel
- a Department of Physiology, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia.,b Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence in Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
| | - Raja Elina Ahmad
- a Department of Physiology, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
| | - Thamil Selvee Ramasamy
- c Department of Molecular Medicine, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
| | - Puvanan Karunanithi
- b Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence in Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
| | - Sangeetha Vasudevaraj Naveen
- b Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence in Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
| | - Tunku Kamarul
- b Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence in Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine , University of Malaya , Kuala Lumpur , Malaysia
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13
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Khalfaoui-Bendriss G, Dussault N, Fernandez-Sauze S, Berenguer-Daizé C, Sigaud R, Delfino C, Cayol M, Metellus P, Chinot O, Mabrouk K, Martin PM, Ouafik L. Adrenomedullin blockade induces regression of tumor neovessels through interference with vascular endothelial-cadherin signalling. Oncotarget 2016; 6:7536-53. [PMID: 25924235 PMCID: PMC4480698 DOI: 10.18632/oncotarget.3167] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 01/19/2015] [Indexed: 11/25/2022] Open
Abstract
The cellular and molecular mechanisms by which adrenomedullin (AM) blockade suppresses tumor neovessels are not well defined. Herein, we show that AM blockade using anti-AM and anti-AM receptors antibodies targets vascular endothelial cells (ECs) and vascular smooth muscle cells (VSMCs), and induces regression of unstable nascent tumor neovessels. The underlying mechanism involved, and shown in vitro and in vivo in mice, is the disruption of the molecular engagement of the endothelial cell-specific junctional molecules vascular endothelial-cadherin (VE-cadherin)/β-catenin complex. AM blockade increases endothelial cell permeability by inhibiting cell-cell contacts predominantly through disruption of VE-cadherin/β-catenin/Akt signalling pathway, thereby leading to vascular collapse and regression of tumor neovessels. At a molecular level, we show that AM blockade induces tyrosine phosphorylation of VE-cadherin at a critical tyrosine, Tyr731, which is sufficient to prevent the binding of β-catenin to the cytoplasmic tail of VE-cadherin leading to the inhibition of cell barrier function. Furthermore, we demonstrate activation of Src kinase by phosphorylation on Tyr416, supporting a role of Src to phosphorylate Tyr731-VE-cadherin. In this model, Src inhibition impairs αAM and αAMR-induced Tyr731-VE-cadherin phosphorylation in a dose-dependent manner, indicating that Tyr731-VE-cadherin phosphorylation state is dependent on Src activation. We found that AM blockade induces β-catenin phosphorylation on Ser33/Ser37/Thr41 sites in both ECs and VSMCs both in vitro and in vivo in mice. These data suggest that AM blockade selectively induces regression of unstable tumor neovessels, through disruption of VE-cadherin signalling. Targeting AM system may present a novel therapeutic target to selectively disrupt assembly and induce regression of nascent tumor neovessels, without affecting normal stabilized vasculature.
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Affiliation(s)
- Ghizlane Khalfaoui-Bendriss
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Nadège Dussault
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Samantha Fernandez-Sauze
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Caroline Berenguer-Daizé
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Romain Sigaud
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Christine Delfino
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Mylène Cayol
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Philippe Metellus
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Olivier Chinot
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France
| | - Kamel Mabrouk
- Aix-Marseille Université, CNRS, UMR 7273, Institut de Chimie Radicalaire (ICR) Marseille, France
| | - Pierre-Marie Martin
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France.,AP-HM, CHU Nord, Service de Transfert d'Oncologie Biologique, Marseille, France
| | - L'Houcine Ouafik
- Aix Marseille Université, CRO2, UMR_S 911, Faculté de Médecine, Marseille, France.,Inserm, U911-CRO2, Marseille, France.,AP-HM, CHU Nord, Service de Transfert d'Oncologie Biologique, Marseille, France
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14
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Giampietro C, Disanza A, Bravi L, Barrios-Rodiles M, Corada M, Frittoli E, Savorani C, Lampugnani MG, Boggetti B, Niessen C, Wrana JL, Scita G, Dejana E. The actin-binding protein EPS8 binds VE-cadherin and modulates YAP localization and signaling. J Cell Biol 2015; 211:1177-92. [PMID: 26668327 PMCID: PMC4687874 DOI: 10.1083/jcb.201501089] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 11/10/2015] [Indexed: 12/13/2022] Open
Abstract
Vascular endothelial (VE)-cadherin transfers intracellular signals contributing to vascular hemostasis. Signaling through VE-cadherin requires association and activity of different intracellular partners. Yes-associated protein (YAP)/TAZ transcriptional cofactors are important regulators of cell growth and organ size. We show that EPS8, a signaling adapter regulating actin dynamics, is a novel partner of VE-cadherin and is able to modulate YAP activity. By biochemical and imaging approaches, we demonstrate that EPS8 associates with the VE-cadherin complex of remodeling junctions promoting YAP translocation to the nucleus and transcriptional activation. Conversely, in stabilized junctions, 14-3-3-YAP associates with the VE-cadherin complex, whereas Eps8 is excluded. Junctional association of YAP inhibits nuclear translocation and inactivates its transcriptional activity both in vitro and in vivo in Eps8-null mice. The absence of Eps8 also increases vascular permeability in vivo, but did not induce other major vascular defects. Collectively, we identified novel components of the adherens junction complex, and we introduce a novel molecular mechanism through which the VE-cadherin complex controls YAP transcriptional activity.
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Affiliation(s)
- Costanza Giampietro
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy Dipartimento di Bioscienze, Università degli Studi di Milano, 20122 Milan, Italy
| | - Andrea Disanza
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy
| | - Luca Bravi
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy
| | - Miriam Barrios-Rodiles
- Center for Systems Biology, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada
| | - Monica Corada
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy
| | | | | | - Maria Grazia Lampugnani
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy Istituto di Ricerche Farmacologiche Mario Negri, 20156 Milan, Italy
| | - Barbara Boggetti
- Department of Dermatology, Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases, Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Carien Niessen
- Department of Dermatology, Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases, Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Jeff L Wrana
- Center for Systems Biology, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Giorgio Scita
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy Dipartimento di Scienze della Salute, Università degli Studi di Milano, 20122 Milan, Italy
| | - Elisabetta Dejana
- FIRC Institute of Molecular Oncology, 20139 Milan, Italy Dipartimento di Bioscienze, Università degli Studi di Milano, 20122 Milan, Italy Department of Immunology, Genetics and Pathology, Uppsala University, 751 05 Uppsala, Sweden
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15
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Chen C, Zhang HX, Wang M, Song XG, Cao J, Wang L, Qiao JL, Lu XY, Han ZX, Zhu P, Pan B, Wu QY, Zhao K, Yan ZL, Li ZY, Zeng LY, Xu KL. Stromal cells attenuate the cytotoxicity of imatinib on Philadelphia chromosome-positive leukemia cells by up-regulating the VE-cadherin/β-catenin signal. Leuk Res 2014; 38:1460-8. [PMID: 25443888 DOI: 10.1016/j.leukres.2014.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/04/2014] [Accepted: 09/13/2014] [Indexed: 11/24/2022]
Abstract
β-Catenin is a key regulator of leukemia stem cell maintenance and drug resistance. Herein, we investigated the protective effects of the stromal cell-mediated VE-cadherin-β-catenin signal on Ph+ leukemia cells during imatinib treatment. We found stromal cells could desensitize imatinib and up-regulate VE-cadherin expression on Ph+ leukemia cells (K562 and SUP-B15 cells), which further stabilized and activated β-catenin. Knockdown of VE-cadherin with shRNA diminished the β-catenin protein and partly resensitized Ph+ leukemia cells to imatinib despite the presence of stromal cells, suggesting VE-cadherin is a potential target in the treatment of Ph+ leukemia.
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Affiliation(s)
- Chong Chen
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China; Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Huan-Xin Zhang
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Man Wang
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Xu-Guang Song
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Jiang Cao
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China; Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Lin Wang
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China; Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Jian-Lin Qiao
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Xiao-Yun Lu
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Zheng-Xiang Han
- Department of Oncology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Ping Zhu
- Department of Oncology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Bin Pan
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Qing-Yun Wu
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Kai Zhao
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Zhi-Ling Yan
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Zhen-Yu Li
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Ling-Yu Zeng
- Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China
| | - Kai-Lin Xu
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China; Laboratory of Transplantation and Immunology, Xuzhou Medical College, Xuzhou, China.
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16
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Eisa-Beygi S, Macdonald RL, Wen XY. Regulatory pathways affecting vascular stabilization via VE-cadherin dynamics: insights from zebrafish (Danio rerio). J Cereb Blood Flow Metab 2014; 34:1430-3. [PMID: 25027310 PMCID: PMC4158677 DOI: 10.1038/jcbfm.2014.128] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 05/31/2014] [Accepted: 06/23/2014] [Indexed: 12/22/2022]
Abstract
The endothelial-specific transmembrane glycoprotein, vascular endothelial (VE)-cadherin, is required for the organization of a stable vascular endothelium. A number of cerebrovascular disorders are associated with mutations in genes that otherwise regulate vascular integrity through VE-cadherin dynamics. Hence, identification and characterization of regulatory pathways contributing to endothelial cell-cell adhesion is of clinical relevance, particularly in the treatment of aneurysms and cerebral cavernous malformations. The zebrafish (Danio rerio) have recently emerged as a powerful paradigm for studies geared toward elucidating the etiology of cerebrovascular disorders, principally in uncovering the genetic and mechanistic basis controlling endothelial adhesive barrier function.
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Affiliation(s)
- Shahram Eisa-Beygi
- 1] Zebrafish Centre for Advanced Drug Discovery, Keenan Research Centre of the Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada [2] Institute of Medical Science, Departments of Medicine and Surgery, University of Toronto, Toronto, Ontario, Canada
| | - R Loch Macdonald
- 1] Zebrafish Centre for Advanced Drug Discovery, Keenan Research Centre of the Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada [2] Institute of Medical Science, Departments of Medicine and Surgery, University of Toronto, Toronto, Ontario, Canada [3] Division of Neurosurgery, St Michael's Hospital, Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute of St Michael's Hospital, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Xiao-Yan Wen
- 1] Zebrafish Centre for Advanced Drug Discovery, Keenan Research Centre of the Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada [2] Institute of Medical Science, Departments of Medicine and Surgery, University of Toronto, Toronto, Ontario, Canada
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17
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Sánchez FA, Ehrenfeld IP, Durán WN. S-nitrosation of proteins: An emergent regulatory mechanism in microvascular permeability and vascular function. Tissue Barriers 2014; 1:e23896. [PMID: 24665382 PMCID: PMC3875611 DOI: 10.4161/tisb.23896] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/02/2013] [Accepted: 02/05/2013] [Indexed: 02/07/2023] Open
Abstract
Nitric oxide (NO) is a key factor in inflammation as it regulates microvascular permeability, leukocyte adhesion and wound healing. This mini-review addresses mainly spatial and temporal requirements of NO regulatory mechanisms, with special emphasis on S-nitrosation. Endothelial nitric oxide synthase (eNOS)-derived NO induces S-nitrosation of p120 and β-catenin, particularly in response to platelet-activating factor (PAF), and through traffic and interactions at the adherens junction promotes endothelial hyperpermeability. S-nitrosation is a determinant in vascular processes such as vasodilation and leukocyte-endothelium interactions. Interestingly, NO decreases leukocytes adhesion to endothelium, but the mechanisms are unknown. Advances in NO molecular biology and regulation may serve as a basis for the development of new therapeutic strategies in the treatment of diseases characterized by inflammation such as ischemia-reperfusion injury, stroke, cancer and atherosclerosis.
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Affiliation(s)
- Fabiola A Sánchez
- Instituto de Inmunología; Universidad Austral de Chile; Valdivia, Chile
| | | | - Walter N Durán
- Department of Pharmacology and Physiology; New Jersey Medical School; University of Medicine and Dentistry of New Jersey; Newark, NJ USA
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18
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Schnittler H, Taha M, Schnittler MO, Taha AA, Lindemann N, Seebach J. Actin filament dynamics and endothelial cell junctions: the Ying and Yang between stabilization and motion. Cell Tissue Res 2014; 355:529-43. [PMID: 24643678 DOI: 10.1007/s00441-014-1856-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 02/24/2014] [Indexed: 12/17/2022]
Abstract
The vascular endothelium is a cellular interface between the blood and the interstitial space of tissue, which controls the exchange of fluid, solutes and cells by both transcellular and paracellular means. To accomplish the demands on barrier function, the regulation of the endothelium requires quick and adaptive mechanisms. This is, among others, accomplished by actin dynamics that interdependently interact with both the VE-cadherin/catenin complex, the main components of the adherens type junctions in endothelium and the membrane cytoskeleton. Actin filaments in endothelium are components of super-structured protein assemblies that control a variety of dynamic processes such as endo- and exocytosis, shape change, cell-substrate along with cell-cell adhesion and cell motion. In endothelium, actin filaments are components of: (1) contractile actin bundles appearing as stress fibers and junction-associated circumferential actin filaments, (2) actin networks accompanied by endocytotic ruffles, lamellipodia at leading edges of migrating cells and junction-associated intermittent lamellipodia (JAIL) that dynamically maintain junction integrity, (3) cortical actin and (4) the membrane cytoskeleton. All these structures, most probably interact with cell junctions and cell-substrate adhesion sites. Due to the rapid growth in information, we aim to provide a bird's eye view focusing on actin filaments in endothelium and its functional relevance for entire cell and junction integrity, rather than discussing the detailed molecular mechanism for control of actin dynamics.
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Affiliation(s)
- Hans Schnittler
- Institute of Anatomy and Vascular Biology, Westfälische Wilhelms-Universität Münster, Vesaliusweg 2-4, 48149, Münster, Germany,
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19
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Samokhvalov IM. Deconvoluting the ontogeny of hematopoietic stem cells. Cell Mol Life Sci 2014; 71:957-78. [PMID: 23708646 PMCID: PMC11113969 DOI: 10.1007/s00018-013-1364-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 04/15/2013] [Accepted: 05/07/2013] [Indexed: 10/26/2022]
Abstract
Two different models describe the development of definitive hematopoiesis and hematopoietic stem cells (HSCs). In one of these, the visceral yolk sac serves as a starting point of relatively lengthy developmental process culminating in the fetal liver hematopoiesis. In another, the origin of adult hematopoiesis is split between the yolk sac and the dorsal aorta, which has a peculiar capacity to generate definitive HSCs. Despite a large amount of experimental data consistent with the latter view, it becomes increasingly unsustainable in the light of recent cell tracing studies. Moreover, analysis of the published studies supporting the aorta-centered version uncovers significant caveats in standard experimental approach and argumentation. As a result, the theory cannot offer feasible cellular mechanisms of the HSC emergence. This review summarizes key efforts to discern the developmental pathway of the adult-type HSCs and attempts to put forward a hypothesis on the inflammatory mechanisms of hematopoietic ontogenesis.
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Affiliation(s)
- Igor M Samokhvalov
- Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Science, 190 Kai Yuan Avenue, Science Park, Guangzhou, 510530, China,
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20
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Mittal M, Siddiqui MR, Tran K, Reddy SP, Malik AB. Reactive oxygen species in inflammation and tissue injury. Antioxid Redox Signal 2014; 20:1126-67. [PMID: 23991888 PMCID: PMC3929010 DOI: 10.1089/ars.2012.5149] [Citation(s) in RCA: 2714] [Impact Index Per Article: 271.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abstract Reactive oxygen species (ROS) are key signaling molecules that play an important role in the progression of inflammatory disorders. An enhanced ROS generation by polymorphonuclear neutrophils (PMNs) at the site of inflammation causes endothelial dysfunction and tissue injury. The vascular endothelium plays an important role in passage of macromolecules and inflammatory cells from the blood to tissue. Under the inflammatory conditions, oxidative stress produced by PMNs leads to the opening of inter-endothelial junctions and promotes the migration of inflammatory cells across the endothelial barrier. The migrated inflammatory cells not only help in the clearance of pathogens and foreign particles but also lead to tissue injury. The current review compiles the past and current research in the area of inflammation with particular emphasis on oxidative stress-mediated signaling mechanisms that are involved in inflammation and tissue injury.
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Affiliation(s)
- Manish Mittal
- 1 Department of Pharmacology, Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, Illinois
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21
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Aydoğdu E, Pamuk ÖN, Dönmez S, Pamuk GE. Decreased interleukin-20 level in patients with systemic sclerosis: are they related with angiogenesis? Clin Rheumatol 2013; 32:1599-603. [PMID: 23812620 DOI: 10.1007/s10067-013-2317-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 02/17/2013] [Accepted: 06/09/2013] [Indexed: 11/28/2022]
Abstract
In this study, we aimed to evaluate the relation between angiogenesis indicators and T helper 17 cytokine group in patients with systemic sclerosis (SSc) which is a disease characterized by impaired angiogenesis and autoimmune response. In our study, patients with SSc are compared with patients with primary Raynaud's phenomenon (RP) and healthy controls. Forty SSc patients, 18 primary RP cases, and 20 healthy controls were included in our study. The demographic and clinical features of patients with SSc were recorded. The serum levels of vascular endothelial growth factor (VEGF), vascular endothelial (VE)-cadherin, interleukin (IL)-20, IL-22, and IL-23 were assessed. In the SSc group, IL-20 level was significantly lower than in both primary RP group and controls (p values <0.001). VE-cadherin level in SSc was significantly higher than in primary RP (p = 0.016). The IL-22 and IL-23 and VEGF levels of SSc, primary RP, and control groups were similar (p values >0.05). In SSc patients, IL-23 correlated negatively with VEGF (r = -0.36, p = 0.025) and positively with VE-cadherin (r = 0.55, p < 0.001). IL-20 levels in SSc patients correlated with disease duration (r = 0.32, p = 0.044). SSc patients with limited involvement had significantly higher VE-cadherin levels than SSc patients with diffuse involvement (p = 0.044). We observed that IL-20 which is an IL-10 group angiogenesis indicator was observed to be suppressed in SSc, suggesting abnormal angiogenesis.
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Affiliation(s)
- Erkan Aydoğdu
- Department of Rheumatology, Trakya University Medical Faculty, Edirne, Turkey
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22
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Li H, Chang J. Bioactive silicate materials stimulate angiogenesis in fibroblast and endothelial cell co-culture system through paracrine effect. Acta Biomater 2013; 9:6981-91. [PMID: 23416471 DOI: 10.1016/j.actbio.2013.02.014] [Citation(s) in RCA: 185] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 01/09/2013] [Accepted: 02/07/2013] [Indexed: 01/23/2023]
Abstract
Angiogenesis is critical in tissue engineering, and bioceramic-induced angiogenesis has been reported. However, the role of other types of cells such as fibroblasts in this bioceramic-induced angiogenesis process has not been reported, and is closer to the in vivo situation of tissue regeneration. In this study, the paracrine effect of silicate bioceramic-induced angiogenesis in the presence of fibroblasts was confirmed by investigating the effects of calcium silicate (CS), one of the simplest silicate bioactive ceramics, on angiogenesis in co-cultures of human dermal fibroblasts (HDF) and human umbilical vein endothelial cells (HUVEC). Results showed that CS extracts stimulated the expression of vascular endothelial growth factor (VEGF) from co-cultured HDF and subsequently enhanced the expression of VEGF receptor 2 on co-cultured HUVEC (co-HUVEC). The endothelial nitric oxide synthase and nitric oxide production in co-HUVEC was then increased to finally initiate the proangiogenesis. During this process, the expression of vascular endothelial cadherin from co-HUVEC was up-regulated, and cadherin proteins were concentrated at the cell junctions to facilitate tube formation. Silicon ions are confirmed to play an important role during silicate bioceramic-inducing angiogenesis, and effective silicon ion concentrations (0.7-1.8μgml(-1)) are proposed.
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Affiliation(s)
- H Li
- Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China
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23
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McClatchey AI, Yap AS. Contact inhibition (of proliferation) redux. Curr Opin Cell Biol 2012; 24:685-94. [DOI: 10.1016/j.ceb.2012.06.009] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 06/14/2012] [Accepted: 06/28/2012] [Indexed: 11/15/2022]
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24
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Abstract
Alterations to blood-brain barrier (BBB) adhesion molecules and junctional integrity during neuroinflammation can promote central nervous system (CNS) pathology. The chemokine CCL2 is elevated during CNS inflammation and is associated with endothelial dysfunction. The effects of CCL2 on endothelial adherens junctions (AJs) have not been defined. We demonstrate that CCL2 transiently induces Src-dependent disruption of human brain microvascular endothelial AJ. β-Catenin is phosphorylated and traffics from the AJ to PECAM-1 (platelet endothelial cell adhesion molecule-1), where it is sequestered at the membrane. PECAM-1 is also tyrosine-phosphorylated, an event associated with recruitment of the phosphatase SHP-2 (Src homology 2 domain-containing protein phosphatase) to PECAM-1, β-catenin release from PECAM-1, and reassociation of β-catenin with the AJ. Surface localization of PECAM-1 is increased in response to CCL2. This may enable the endothelium to sustain CCL2-induced alterations in AJ and facilitate recruitment of leukocytes into the CNS. Our novel findings provide a mechanism for CCL2-mediated disruption of endothelial junctions that may contribute to BBB dysfunction and increased leukocyte recruitment in neuroinflammatory diseases.
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Odell AF, Hollstein M, Ponnambalam S, Walker JH. A VE-cadherin-PAR3-α-catenin complex regulates the Golgi localization and activity of cytosolic phospholipase A(2)α in endothelial cells. Mol Biol Cell 2012; 23:1783-96. [PMID: 22398721 PMCID: PMC3338442 DOI: 10.1091/mbc.e11-08-0694] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The rapid regulation of phospholipase A2 activity is essential for vascular function. Evidence is found for a VE-cadherin–α-catenin–PAR3 complex regulating the reversible association of cPLA2α with the Golgi apparatus in confluent endothelial cells. This regulation is important for controlling both cPLA2α activity and angiogenesis. Phospholipase A2 enzymes hydrolyze phospholipids to liberate arachidonic acid for the biosynthesis of prostaglandins and leukotrienes. In the vascular endothelium, group IV phospholipase A2α (cPLA2α) enzyme activity is regulated by reversible association with the Golgi apparatus. Here we provide evidence for a plasma membrane cell adhesion complex that regulates endothelial cell confluence and simultaneously controls cPLA2α localization and enzymatic activity. Confluent endothelial cells display pronounced accumulation of vascular endothelial cadherin (VE-cadherin) at cell–cell junctions, and mechanical wounding of the monolayer stimulates VE-cadherin complex disassembly and cPLA2α release from the Golgi apparatus. VE-cadherin depletion inhibits both recruitment of cPLA2α to the Golgi and formation of tubules by endothelial cells. Perturbing VE-cadherin and increasing the soluble cPLA2α fraction also stimulated arachidonic acid and prostaglandin production. Of importance, reverse genetics shows that α-catenin and δ-catenin, but not β-catenin, regulates cPLA2α Golgi localization linked to cell confluence. Furthermore, cPLA2α Golgi localization also required partitioning defective protein 3 (PAR3) and annexin A1. Disruption of F-actin internalizes VE-cadherin and releases cPLA2α from the adhesion complex and Golgi apparatus. Finally, depletion of either PAR3 or α-catenin promotes cPLA2α-dependent endothelial tubule formation. Thus a VE-cadherin–PAR3–α-catenin adhesion complex regulates cPLA2α recruitment to the Golgi apparatus, with functional consequences for vascular physiology.
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Affiliation(s)
- Adam F Odell
- Endothelial Cell Biology Unit, Institute for Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom.
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Inhibition of mini-TyrRS-induced angiogenesis response in endothelial cells by VE-cadherin-dependent mini-TrpRS. Heart Vessels 2011; 27:193-201. [DOI: 10.1007/s00380-011-0137-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Accepted: 03/04/2011] [Indexed: 10/18/2022]
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Li H, Daculsi R, Grellier M, Bareille R, Bourget C, Remy M, Amedee J. The role of vascular actors in two dimensional dialogue of human bone marrow stromal cell and endothelial cell for inducing self-assembled network. PLoS One 2011; 6:e16767. [PMID: 21304816 PMCID: PMC3033416 DOI: 10.1371/journal.pone.0016767] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 01/14/2011] [Indexed: 11/25/2022] Open
Abstract
Angiogenesis is very important for vascularized tissue engineering. In this study, we found that a two-dimensional co-culture of human bone marrow stromal cell (HBMSC) and human umbical vein endothelial cell (HUVEC) is able to stimulate the migration of co-cultured HUVEC and induce self-assembled network formation. During this process, expression of vascular endothelial growth factor (VEGF165) was upregulated in co-cultured HBMSC. Meanwhile, VEGF165-receptor2 (KDR) and urokinase-type plasminogen activator (uPA) were upregulated in co-cultured HUVEC. Functional studies show that neutralization of VEGF165 blocked the migration and the rearrangement of the cells and downregulated the expression of uPA and its receptor. Blocking of vascular endothelial-cadherin (VE-cad) did not affect the migration of co-cultured HUVEC but suppressed the self-assembled network formation. In conclusion, co-cultures upregulated the expression of VEGF165 in co-cultured HBMSC; VEGF165 then activated uPA in co-cultured HUVEC, which might be responsible for initiating the migration and the self-assembled network formation with the participation of VE-cad. All of these results indicated that only the direct contact of HBMSC and HUVEC and their respective dialogue are sufficient to stimulate secretion of soluble factors and to activate molecules that are critical for self-assembled network formation which show a great application potential for vascularization in tissue engineering.
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Affiliation(s)
- Haiyan Li
- INSERM U577, Bordeaux and University Victor Segalen Bordeaux 2, Bordeaux, France.
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Chavez A, Smith M, Mehta D. New Insights into the Regulation of Vascular Permeability. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2011; 290:205-48. [DOI: 10.1016/b978-0-12-386037-8.00001-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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The soluble fragment of VE-cadherin inhibits angiogenesis by reducing endothelial cell proliferation and tube capillary formation. Cancer Gene Ther 2010; 17:700-7. [PMID: 20559333 DOI: 10.1038/cgt.2010.26] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Vascular endothelial-specific cadherin (VE-cadherin) is an endothelial cell-specific adhesion molecule, localized at cell-cell contact sites. It is involved in physiological and pathological angiogenesis. In this study, we showed that in vitro a soluble N-terminal fragment of VE-cadherin (EC1-3) corresponding to cadherin 1-3 ectodomains inhibited vascular endothelial growth factor-stimulated endothelial cell proliferation and capillary tube structure formation in the matrigel model. In vivo, EC1-3 was tested in a murine colon cancer model. EC1-3-expressing colon cancer C51 cells were subcutaneously grafted into nude mice, and tumor growth and angiogenesis were evaluated. At day 33, the mean volume of the tumors developed was reduced (510±104 versus 990±120 mm(3) for control). Similarly, injection of EC1-3 virus-producing cells into established C51 tumors resulted in an inhibition by 33% of tumor growth. Immunohistological staining of vessels on tumor sections showed a significantly reduced intratumoral angiogenesis. Furthermore, EC1-3 did not induce vessel injury in the lung, liver, spleen, heart and brain in the mice. These results suggest that the soluble N-terminal fragment of VE-cadherin EC1-3 could exert an antitumoral effect by targeting tumor angiogenesis, which included blocking endothelial cell proliferation and capillary tube formation with no obvious toxicity on normal organs.
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Rabascio C, Bertolini F. Blood-based biomarkers for the optimization of anti-angiogenic therapies. Cancers (Basel) 2010; 2:1027-39. [PMID: 24281105 PMCID: PMC3835117 DOI: 10.3390/cancers2021027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/11/2010] [Accepted: 05/27/2010] [Indexed: 01/07/2023] Open
Abstract
The dependence of tumor growth and metastasis on blood vessels makes tumor angiogenesis a rational target for therapy. Strategies have been pursued to inhibit neovascularization and to destroy existing tumor vessels, or both. These include direct targeting of endothelial cells, and indirect targeting by inhibiting the release of proangiogenic growth factors by cancer or stromal cells. Many patients benefit from antiangiogenic therapies; thus, development of noninvasive biomarkers of disease response and relapse is a crucial objective to aid in their management. A number of non-invasive tools are described with their potential benefits and limitations. We review currently available candidate biomarkers of anti-angiogenic agent effect. Including these markers into clinical trials may provide insight into appropriate dosing for desired biological effects, appropriate timing of additional therapy, and prediction of individual response. This has important consequences for the clinical use of angiogenesis inhibitors and for drug discovery, not only for optimizing the treatment of cancer, but possibly also for developing therapeutic approaches for various other diseases.
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Affiliation(s)
- Cristina Rabascio
- Laboratory of Hematology-Oncology, European Institute of Oncology, via Ripamonti 435, Milan 20141, Italy.
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31
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Leach L, Taylor A, Sciota F. Vascular dysfunction in the diabetic placenta: causes and consequences. J Anat 2010; 215:69-76. [PMID: 19563553 DOI: 10.1111/j.1469-7580.2009.01098.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The development and functioning of the human fetoplacental vascular system are vulnerable to the maternal diabetic milieu. These vessels are in direct continuum with the fetal vascular system and are therefore also vulnerable to fetal endocrine derangements. Increased angiogenesis, altered junctional maturity and molecular occupancy, together with increased leakiness, constitute a well-described phenotype of vessels in the Type 1 diabetic human placenta and can be related to increased levels of placental vascular endothelial growth factor. The causes of these observed changes, whether maternal hyperglycaemia or fetal hyperinsulinaemia, still remain to be shown in the human placenta. Mechanistic studies using different vascular systems have shown high glucose and insulin to have profound vascular effects, with elevations in vascular endothelial growth factor, nitric oxide and protein kinase C being behind alterations in junctional adhesion molecules such as occludin and vascular endothelial-cadherin and vascular leakage of albumin. The role of advanced glycation products and oxidative stress in this vascular pathology is also discussed. The altered molecular mechanisms underlying the vascular changes in the diabetic human placenta may reflect similar consequences of high glucose and hyperinsulinaemia.
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Affiliation(s)
- Lopa Leach
- School of Biomedical Sciences, Centre for Integrated Systems Biology and Medicine, Institute of Clinical Research, Faculty of Medicine and Health Sciences, University of Nottingham, UK.
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32
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Tumor angiogenesis: insights and innovations. JOURNAL OF ONCOLOGY 2010; 2010:132641. [PMID: 20445741 PMCID: PMC2860112 DOI: 10.1155/2010/132641] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 02/12/2010] [Accepted: 02/12/2010] [Indexed: 12/21/2022]
Abstract
Angiogenesis is a vital process resulting in the formation of new blood vessels. It is normally a highly regulated process that occurs during human development, reproduction, and wound repair. However, angiogenesis can also become a fundamental pathogenic process found in cancer and several other diseases. To date, the inhibition of angiogenesis has been researched at both the bench and the bedside. While several studies have found moderate improvements when treating with angiogenesis inhibitors, greater success is being seen when the inhibition of angiogenesis is combined with other traditional forms of available therapy. This review summarizes several important angiogenic factors, examines new research and ongoing clinical trials for such factors, and attempts to explain how this new knowledge may be applied in the fight against cancer and other angiogenic-related diseases.
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Chaudhury H, Zakkar M, Boyle J, Cuhlmann S, van der Heiden K, Luong LA, Davis J, Platt A, Mason JC, Krams R, Haskard DO, Clark AR, Evans PC. c-Jun N-Terminal Kinase Primes Endothelial Cells at Atheroprone Sites for Apoptosis. Arterioscler Thromb Vasc Biol 2010; 30:546-53. [DOI: 10.1161/atvbaha.109.201368] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Objective—
Atherosclerosis is a focal disease that occurs predominantly at branches and bends of the arterial tree. Endothelial cells (EC) at atherosusceptible sites are prone to injury, which can contribute to lesion formation, whereas EC at atheroprotected sites are resistant. The c-Jun N-terminal kinase (JNK) is activated constitutively in EC at atherosusceptible sites but is inactivated at atheroprotected sites by mitogen-activated protein kinase phosphatase-1 (MKP-1). Here, we examined the effects of JNK activation on EC physiology at atherosusceptible sites.
Methods and Results—
We identified transcriptional programs regulated by JNK by applying a specific pharmacological inhibitor to cultured EC and assessing the transcriptome using microarrays. This approach and subsequent validation by gene silencing revealed that JNK positively regulates the expression of numerous proapoptotic molecules. Analysis of aortae of wild-type, JNK1
−/−
, and MKP-1
−/−
mice revealed that EC at an atherosusceptible site express proapoptotic proteins and are primed for apoptosis and proliferation in response to lipopolysaccharide through a JNK1-dependent mechanism, whereas EC at a protected site expressed lower levels of proapoptotic molecules and were protected from injury by MKP-1.
Conclusion—
Spatial variation of JNK1 activity delineates the spatial distribution of apoptosis and turnover of EC in arteries.
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Affiliation(s)
- Hera Chaudhury
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Mustafa Zakkar
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Joseph Boyle
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Simon Cuhlmann
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Kim van der Heiden
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Le Anh Luong
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Jeremy Davis
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Adam Platt
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Justin C. Mason
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Rob Krams
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Dorian O. Haskard
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Andrew R. Clark
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
| | - Paul C. Evans
- From BHF Cardiovascular Sciences Unit (H.C., M.Z., J.B., S.C., K.v.d.H., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute, Imperial College London, London, UK; UCB Celltech (J.D., A.P.), Slough, UK; and Department of Bioengineering (R.K.) and Kennedy Institute of Rheumatology Division (A.R.C.), Imperial College London, London, UK. A. Platt is currently affiliated with Roche Products Limited, Welwyn Garden City, UK
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Oas RG, Xiao K, Summers S, Wittich KB, Chiasson CM, Martin WD, Grossniklaus HE, Vincent PA, Reynolds AB, Kowalczyk AP. p120-Catenin is required for mouse vascular development. Circ Res 2010; 106:941-51. [PMID: 20110533 DOI: 10.1161/circresaha.109.207753] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
RATIONALE p120-catenin (p120) is an armadillo family protein that binds to the cytoplasmic domain of classical cadherins and prevents cadherin endocytosis. The role of p120 in vascular development is unknown. OBJECTIVE The purpose of this study is to examine the role of p120 in mammalian vascular development by generating a conditionally mutant mouse lacking endothelial p120 and determining the effects of the knockout on vasculogenesis, angiogenic remodeling, and the regulation of endothelial cadherin levels. METHODS AND RESULTS A conditional Cre/loxP gene deletion strategy was used to ablate p120 expression, using the Tie2 promoter to drive endothelial Cre recombinase expression. Mice lacking endothelial p120 died embryonically beginning at embryonic day 11.5. Major blood vessels appeared normal at embryonic day 9.5. However, both embryonic and extraembryonic vasculature of mutant animals were disorganized and displayed decreased microvascular density by embryonic day 11.5. Importantly, both vascular endothelial cadherin and N-cadherin levels were significantly reduced in vessels lacking p120. This decrease in cadherin expression was accompanied by reduced pericyte recruitment and hemorrhaging. Furthermore, p120-null cultured endothelial cells exhibited proliferation defects that could be rescued by exogenous expression of vascular endothelial cadherin. CONCLUSIONS These findings reveal a fundamental role for p120 in regulating endothelial cadherin levels during vascular development, as well as microvascular patterning, vessel integrity, and endothelial cell proliferation. Loss of endothelial p120 results in lethality attributable to decreased microvascular density and hemorrhages.
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Affiliation(s)
- Rebecca G Oas
- Department of Cell Biology, 615 Michael St, Room 465, Atlanta, GA 30322, USA
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Makrilia N, Lappa T, Xyla V, Nikolaidis I, Syrigos K. The role of angiogenesis in solid tumours: an overview. Eur J Intern Med 2009; 20:663-71. [PMID: 19818284 DOI: 10.1016/j.ejim.2009.07.009] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 07/12/2009] [Accepted: 07/20/2009] [Indexed: 02/08/2023]
Abstract
Angiogenesis is the physiological process of the formation of new blood vessels from pre-existing ones. Multiple molecules regulate angiogenesis, such as the vascular endothelial growth factor, angiopoietins, the fibroblast growth factor, the platelet-derived growth factor and the transforming growth factor-beta. Angiogenesis plays an important role in the growth, progression and metastasis of a tumour. Inhibiting the angiogenic process or targeting existing tumour vessels can be used for treatment of tumours as an alternative or in parallel with conventional chemotherapy. Many anti-angiogenic factors are under investigation and some are already being used in clinical practice with various results.
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Affiliation(s)
- Nektaria Makrilia
- 3rd Department of Medicine, Sotiria General Hospital, Athens School of Medicine, Greece.
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Hypersensitivity to contact inhibition provides a clue to cancer resistance of naked mole-rat. Proc Natl Acad Sci U S A 2009; 106:19352-7. [PMID: 19858485 DOI: 10.1073/pnas.0905252106] [Citation(s) in RCA: 250] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The naked mole-rat is the longest living rodent with a maximum lifespan exceeding 28 years. In addition to its longevity, naked mole-rats have an extraordinary resistance to cancer as tumors have never been observed in these rodents. Furthermore, we show that a combination of activated Ras and SV40 LT fails to induce robust anchorage-independent growth in naked mole-rat cells, while it readily transforms mouse fibroblasts. The mechanisms responsible for the cancer resistance of naked mole-rats were unknown. Here we show that naked mole-rat fibroblasts display hypersensitivity to contact inhibition, a phenomenon we termed "early contact inhibition." Contact inhibition is a key anticancer mechanism that arrests cell division when cells reach a high density. In cell culture, naked mole-rat fibroblasts arrest at a much lower density than those from a mouse. We demonstrate that early contact inhibition requires the activity of p53 and pRb tumor suppressor pathways. Inactivation of both p53 and pRb attenuates early contact inhibition. Contact inhibition in human and mouse is triggered by the induction of p27(Kip1). In contrast, early contact inhibition in naked mole-rat is associated with the induction of p16(Ink4a). Furthermore, we show that the roles of p16(Ink4a) and p27(Kip1) in the control of contact inhibition became temporally separated in this species: the early contact inhibition is controlled by p16(Ink4a), and regular contact inhibition is controlled by p27(Kip1). We propose that the additional layer of protection conferred by two-tiered contact inhibition contributes to the remarkable tumor resistance of the naked mole-rat.
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Local cell metrics: a novel method for analysis of cell-cell interactions. BMC Bioinformatics 2009; 10:350. [PMID: 19852804 PMCID: PMC2944256 DOI: 10.1186/1471-2105-10-350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Accepted: 10/23/2009] [Indexed: 11/14/2022] Open
Abstract
Background The regulation of many cell functions is inherently linked to cell-cell contact interactions. However, effects of contact interactions among adherent cells can be difficult to detect with global summary statistics due to the localized nature and noise inherent to cell-cell interactions. The lack of informatics approaches specific for detecting cell-cell interactions is a limitation in the analysis of large sets of cell image data, including traditional and combinatorial or high-throughput studies. Here we introduce a novel histogram-based data analysis strategy, termed local cell metrics (LCMs), which addresses this shortcoming. Results The new LCM method is demonstrated via a study of contact inhibition of proliferation of MC3T3-E1 osteoblasts. We describe how LCMs can be used to quantify the local environment of cells and how LCMs are decomposed mathematically into metrics specific to each cell type in a culture, e.g., differently-labelled cells in fluorescence imaging. Using this approach, a quantitative, probabilistic description of the contact inhibition effects in MC3T3-E1 cultures has been achieved. We also show how LCMs are related to the naïve Bayes model. Namely, LCMs are Bayes class-conditional probability functions, suggesting their use for data mining and classification. Conclusion LCMs are successful in robust detection of cell contact inhibition in situations where conventional global statistics fail to do so. The noise due to the random features of cell behavior was suppressed significantly as a result of the focus on local distances, providing sensitive detection of cell-cell contact effects. The methodology can be extended to any quantifiable feature that can be obtained from imaging of cell cultures or tissue samples, including optical, fluorescent, and confocal microscopy. This approach may prove useful in interpreting culture and histological data in fields where cell-cell interactions play a critical role in determining cell fate, e.g., cancer, developmental biology, and tissue regeneration.
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Vallon M, Rohde F, Janssen KP, Essler M. Tumor endothelial marker 5 expression in endothelial cells during capillary morphogenesis is induced by the small GTPase Rac and mediates contact inhibition of cell proliferation. Exp Cell Res 2009; 316:412-21. [PMID: 19853600 DOI: 10.1016/j.yexcr.2009.10.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Revised: 10/09/2009] [Accepted: 10/16/2009] [Indexed: 12/21/2022]
Abstract
Tumor endothelial marker (TEM) 5 is an adhesion G-protein-coupled receptor upregulated in endothelial cells during tumor and physiologic angiogenesis. So far, the mechanisms leading to upregulation of TEM5 and its function during angiogenesis have not been identified. Here, we report that TEM5 expression in endothelial cells is induced during capillary-like network formation on Matrigel, during capillary morphogenesis in a three-dimensional collagen I matrix, and upon confluence on a two-dimensional matrix. TEM5 expression was not induced by a variety of soluble angiogenic factors, including VEGF and bFGF, in subconfluent endothelial cells. TEM5 upregulation was blocked by toxin B from Clostridium difficile, an inhibitor of the small GTPases Rho, Rac, and Cdc42. The Rho inhibitor C3 transferase from Clostridium botulinum did not affect TEM5 expression, whereas the Rac inhibitor NSC23766 suppressed TEM5 upregulation. An excess of the soluble TEM5 extracellular domain or an inhibitory monoclonal TEM5 antibody blocked contact inhibition of endothelial cell proliferation resulting in multilayered islands within the endothelial monolayer and increased vessel density during capillary formation. Based on our results we conclude that TEM5 expression during capillary morphogenesis is induced by the small GTPase Rac and mediates contact inhibition of proliferation in endothelial cells.
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Affiliation(s)
- Mario Vallon
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Ismaninger Strasse 22, 81675 Munich, Germany.
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Khaidakov M, Wang W, Khan JA, Kang BY, Hermonat PL, Mehta JL. Statins and angiogenesis: is it about connections? Biochem Biophys Res Commun 2009; 387:543-7. [PMID: 19615978 DOI: 10.1016/j.bbrc.2009.07.057] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Accepted: 07/13/2009] [Indexed: 10/20/2022]
Abstract
Statins, inhibitors of 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase, have been shown to induce both angiogenic and angiostatic responses. We attempted to resolve this controversy by studying the effects of two different statins, rosuvastatin and simvastatin, in two different assay systems. In the matrigel angiogenesis assay, both statins enhanced tube formation by human umbilical vein endothelial cells (HUVECs, p<0.01 vs. control). In the ex vivo mouse aortic ring sprouting assay, both statins virtually abolished new vessel formation (p<0.01). As a basic difference between the two models of angiogenesis is dispersed state of endothelial cells vs. compact monolayer, we analyzed influence of statins on endothelial junction proteins. RT-PCR analysis and cytoimmunostaining of HUVECs treated with simvastatin revealed increased expression of VE-cadherin (p<0.05). The blockade of VE-cadherin with a specific antibody reversed simvastatin-induced tube formation (p<0.002). These data suggest that statins through VE-cadherin stimulation modulate cell-cell adhesion and diminish the ability of cells to proliferate and migrate. The observations of reduced angiogenesis in the intact vessel may relate to anti-atherosclerotic and anti-cancer effects of statins, and provide a feasible explanation for conflicting data under different experimental conditions.
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Affiliation(s)
- Magomed Khaidakov
- Division of Cardiology, University of Arkansas for Medical Sciences and VA Medical Center, Little Rock, AR 72205, USA.
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Tunable interplay between epidermal growth factor and cell-cell contact governs the spatial dynamics of epithelial growth. Proc Natl Acad Sci U S A 2009; 106:11149-53. [PMID: 19549816 DOI: 10.1073/pnas.0812651106] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Contact-inhibition of proliferation constrains epithelial tissue growth, and the loss of contact-inhibition is a hallmark of cancer cells. In most physiological scenarios, cell-cell contact inhibits proliferation in the presence of other growth-promoting cues, such as soluble growth factors (GFs). How cells quantitatively reconcile the opposing effects of cell-cell contact and GFs, such as epidermal growth factor (EGF), remains unclear. Here, using quantitative analysis of single cells within multicellular clusters, we show that contact is not a "master switch" that overrides EGF. Only when EGF recedes below a threshold level, contact inhibits proliferation, causing spatial patterns in cell cycle activity within epithelial cell clusters. Furthermore, we demonstrate that the onset of contact-inhibition and the timing of spatial patterns in proliferation may be reengineered. Using micropatterned surfaces to amplify cell-cell interactions, we induce contact-inhibition at a higher threshold level of EGF. Using a complementary molecular genetics approach to enhance cell-cell interactions by overexpressing E-cadherin also increases the threshold level of EGF at which contact-inhibition is triggered. These results lead us to propose a state diagram in which epithelial cells transition from a contact-uninhibited state to a contact-inhibited state at a critical threshold level of EGF, a property that may be tuned by modulating the extent of cell-cell contacts. This quantitative model of contact-inhibition has direct implications for how tissue size may be determined and deregulated during development and tumor formation, respectively, and provides design principles for engineering epithelial tissue growth in applications such as tissue engineering.
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Le Bras A, Soncin F. [Genes that make the endothelial identity]. JOURNAL DE LA SOCIETE DE BIOLOGIE 2009; 203:125-41. [PMID: 19527626 DOI: 10.1051/jbio/2009016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The endothelium is a tissue with a distinct identity due to the specific expression of molecular markers by endothelial cells. Further, the endothelium displays a structural heterogeneity illustrated by the expression of specific markers in arteries and in veins. Here, we present a review of the transcriptional and epigenetic mechanisms regulating the expression of the main markers of endothelial cells in man and mouse, demonstrating that there is no common and unique mechanism of specific expression of genes in these cells.
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Affiliation(s)
- Alexandra Le Bras
- Institut de Biologie de Lille, CNRS UMR8161, Equipe Labellisée Ligue Nationale contre le Cancer 2008, Université de Lille I, Université de Lille II, Institut Pasteur de Lille, 1, rue Calmette, 59021 Lille Cedex, France
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Ambrosi D, Preziosi L. Cell adhesion mechanisms and stress relaxation in the mechanics of tumours. Biomech Model Mechanobiol 2008; 8:397-413. [PMID: 19115069 DOI: 10.1007/s10237-008-0145-y] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Accepted: 12/02/2008] [Indexed: 01/16/2023]
Abstract
Tumour cells usually live in an environment formed by other host cells, extra-cellular matrix and extra-cellular liquid. Cells duplicate, reorganise and deform while binding each other due to adhesion molecules exerting forces of measurable strength. In this paper, a macroscopic mechanical model of solid tumour is investigated which takes such adhesion mechanisms into account. The extracellular matrix is treated as an elastic compressible material, while, in order to define the relationship between stress and strain for the cellular constituents, the deformation gradient is decomposed in a multiplicative way distinguishing the contribution due to growth, to cell rearrangement and to elastic deformation. On the basis of experimental results at a cellular level, it is proposed that at a macroscopic level there exists a yield condition separating the elastic and dissipative regimes. Previously proposed models are obtained as limit cases, e.g. fluid-like models are obtained in the limit of fast cell reorganisation and negligible yield stress. A numerical test case shows that the model is able to account for several complex interactions: how tumour growth can be influenced by stress, how and where it can generate cell reorganisation to release the stress level, how it can lead to capsule formation and compression of the surrounding tissue.
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Affiliation(s)
- Davide Ambrosi
- Dipartimento di Matematica, Politecnico di Torino, Turin, Italy.
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Moll R, Sievers E, Hämmerling B, Schmidt A, Barth M, Kuhn C, Grund C, Hofmann I, Franke WW. Endothelial and virgultar cell formations in the mammalian lymph node sinus: endothelial differentiation morphotypes characterized by a special kind of junction (complexus adhaerens). Cell Tissue Res 2008; 335:109-41. [PMID: 19015886 DOI: 10.1007/s00441-008-0700-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2008] [Accepted: 09/15/2008] [Indexed: 12/25/2022]
Abstract
The lymph node sinus are channel structures of unquestionable importance in immunology and pathology, specifically in the filtering of the lymph, the transport and processing of antigens, the adhesion and migration of immune cells, and the spread of metastatic cancer cells. Our knowledge of the cell and molecular biology of the sinus-forming cells is still limited, and the origin and biological nature of these cells have long been a matter of debate. Here, we review the relevant literature and present our own experimental results, in particular concerning molecular markers of intercellular junctions and cell differentiation. We show that both the monolayer cells lining the sinus walls and the intraluminal virgultar cell meshwork are indeed different morphotypes of the same basic endothelial cell character, as demonstrated by the presence of a distinct spectrum of general and lymphatic endothelial markers, and we therefore refer to these cells as sinus endothelial/virgultar cells (SEVCs). These cells are connected by unique adhering junctions, termed complexus adhaerentes, characterized by the transmembrane glycoprotein VE-cadherin, combined with the desmosomal plaque protein desmoplakin, several adherens junction plaque proteins including alpha- and beta-catenin and p120 catenin, and components of the tight junction ensemble, specifically claudin-5 and JAM-A, and the plaque protein ZO-1. We show that complexus adhaerentes are involved in the tight three-dimensional integration of the virgultar network of SEVC processes along extracellular guidance structures composed of paracrystalline collagen bundle "stays". Overall, the SEVC system might be considered as a local and specific modification of the general lymphatic vasculature system. Finally, physiological and pathological alterations of the SEVC system will be presented, and the possible value of the molecular markers described in histological diagnoses of autochthonous lymph node tumors will be discussed.
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Affiliation(s)
- Roland Moll
- Institute of Pathology, Philipps University of Marburg, 35033 Marburg, Germany.
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Abstract
Cell contact-dependent signaling is a major regulatory mechanism in the organization of developing tissues and in the reorganization (post-injury responses) of specialized tissues in multicellular organisms. In this review we contribute to the further understanding of post-injury recovery processes in adult nervous tissue. We emphasize evidence that supports the involvement of cell contact-inhibition signaling in the cell proliferation, growth and differentiation that occurs during healing and neural reorganization after brain damage.
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Beyond vessels: occurrence and regional clustering of vascular endothelial (VE-)cadherin-containing junctions in non-endothelial cells. Cell Tissue Res 2008; 335:49-65. [DOI: 10.1007/s00441-008-0718-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 10/02/2008] [Indexed: 10/21/2022]
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Zhu YT, Hayashida Y, Kheirkhah A, He H, Chen SY, Tseng SCG. Characterization and comparison of intercellular adherent junctions expressed by human corneal endothelial cells in vivo and in vitro. Invest Ophthalmol Vis Sci 2008; 49:3879-86. [PMID: 18502989 PMCID: PMC2566851 DOI: 10.1167/iovs.08-1693] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Human corneal endothelial cell (HCEC) proliferation is controlled by HCEC junctions, but the mechanism of proliferation remains unknown. The authors sought to characterize adherent junction components of in vivo HCECs and to compare their gene expression and their proliferative potential with those of in vitro counterparts. METHODS Stripped human Descemet membranes were digested with collagenase A, and the resultant HCEC aggregates were cultured for 7, 14, and 21 days in supplemented hormonal epithelial medium (SHEM). The growth of HCEC monolayers was monitored by BrdU labeling performed 24 hours before termination. In vivo and in vitro HCECs were subjected to immunostaining to FITC-phalloidin and antibodies to different junction components and BrdU. Their mRNA expressions were determined by RT-PCR. RESULTS In vivo HCECs expressed transcripts of N-, VE-, E-, and P-cadherins, alpha-, beta-, gamma-, and p120-catenins, and p190. In vitro HCEC counterparts also expressed all these mRNAs except P-cadherin. In vivo HCECs displayed continuous circular F-actin, N-cadherin, beta- and p120-catenins, and p190, discontinuous circular VE-cadherin bands at or close to cell junctions, and E-cadherin in the cytoplasm. Such an in vivo pattern was gradually achieved by in vitro HCECs at day 21 and was correlated with a progressive decline of BrdU labeling. CONCLUSIONS In vivo and in vitro HCECs displayed distinct protein cytolocalization of N-, VE-, and E-cadherins, beta- and p120-catenins, and p190. Progressive maturation of adherent junctions was associated with a decline of the proliferative potential. This information allows us to devise new strategies to engineer in vitro HCECs by targeting these components.
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Affiliation(s)
- Ying-Ting Zhu
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research and Education Foundation, Miami, Florida, USA
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Navaratna D, Maestas J, McGuire PG, Das A. Suppression of retinal neovascularization with an antagonist to vascular endothelial cadherin. ACTA ACUST UNITED AC 2008; 126:1082-8. [PMID: 18695103 DOI: 10.1001/archopht.126.8.1082] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVES To examine the role of vascular endothelial cadherin (VE-cadherin) in cellular processes underlying angiogenesis and the effects of VE-cadherin inhibition on retinal angiogenesis. METHODS Retinal neovascularization was induced in newborn mice by exposure to 75% oxygen (postnatal days 7-12) followed by room air and quantitated from histological sections. Mice received daily intraperitoneal injections of either a VE-cadherin antagonist or a control peptide from postnatal days 12 to 17. In vitro cell migration, proliferation, and tubule formation were examined in the presence of the VE-cadherin antagonist. The effect of antagonist treatment on the integrity of established cell junctions was examined by fluorescein isothiocyanate-dextran monolayer permeability and VE-cadherin immunocytochemistry. RESULTS Treatment with the VE-cadherin antagonist significantly reduced retinal angiogenesis. Inhibition of VE-cadherin function suppressed tubule formation in endothelial cells. The antagonist treatment also decreased cell migration and proliferation. The antagonist treatment did not affect the integrity of existing cell junctions. Immunostaining for VE-cadherin and rates of monolayer permeability were comparable to those in untreated controls. CONCLUSION Our study points to a pivotal role played by VE-cadherin in the angiogenic process. CLINICAL RELEVANCE Inhibition of VE-cadherin might be an effective strategy for pharmacological inhibition in proliferative retinopathies.
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Affiliation(s)
- Deepti Navaratna
- Department of Cell Biology and Physiology, University of New Mexico, Albuquerque, NM 87131-0001, USA
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Gray DS, Liu WF, Shen CJ, Bhadriraju K, Nelson CM, Chen CS. Engineering amount of cell-cell contact demonstrates biphasic proliferative regulation through RhoA and the actin cytoskeleton. Exp Cell Res 2008; 314:2846-54. [PMID: 18652824 DOI: 10.1016/j.yexcr.2008.06.023] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Revised: 06/24/2008] [Accepted: 06/25/2008] [Indexed: 02/03/2023]
Abstract
Endothelial cell-cell contact via VE-cadherin plays an important role in regulating numerous cell functions, including proliferation. However, using different experimental approaches to manipulate cell-cell contact, investigators have observed both inhibition and stimulation of proliferation depending on the adhesive context. In this study, we used micropatterned wells combined with active positioning of cells by dielectrophoresis in order to investigate whether the number of contacting neighbors affected the proliferative response. Varying cell-cell contact resulted in a biphasic effect on proliferation; one contacting neighbor increased proliferation, while two or more neighboring cells partially inhibited this increase. We also observed that cell-cell contact increased the formation of actin stress fibers, and that expression of dominant negative RhoA (RhoN19) blocked the contact-mediated increase in stress fibers and proliferation. Furthermore, examination of heterotypic pairs of untreated cells in contact with RhoN19-expressing cells revealed that intracellular, but not intercellular, tension is required for the contact-mediated stimulation of proliferation. Moreover, engagement of VE-cadherin with cadherin-coated beads was sufficient to stimulate proliferation in the absence of actual cell-cell contact. In all, these results demonstrate that cell-cell contact signals through VE-cadherin, RhoA, and intracellular tension in the actin cytoskeleton to regulate proliferation.
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Affiliation(s)
- Darren S Gray
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205, USA
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