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Treps L, Le Guelte A, Gavard J. Emerging roles of Semaphorins in the regulation of epithelial and endothelial junctions. Tissue Barriers 2014; 1:e23272. [PMID: 24665374 PMCID: PMC3879177 DOI: 10.4161/tisb.23272] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 12/11/2012] [Accepted: 12/13/2012] [Indexed: 12/13/2022] Open
Abstract
Tissue barriers maintain homeostasis, protect underlying tissues, are remodeled during organogenesis and injury and limit aberrant proliferation and dissemination. In this context, endothelial and epithelial intercellular junctions are the primary targets of various cues. This cellular adaptation requires plasticity and dynamics of adhesion molecules and the associated cytoskeleton, as well as the adhesive-linked signaling platforms. It is therefore not surprising that the guidance molecules from the Semaphorin family arise as novel modifiers of epithelia and endothelia in development and diseases. This review will focus on the actions of Semaphorins, and their cognate receptors, Plexins and Neuropilins, on epithelial and endothelial barrier properties.
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Affiliation(s)
- Lucas Treps
- CNRS; UMR8104; Paris, France ; Inserm; U1016; Paris, France ; Université Paris Descartes; Sorbonne Paris Cite; Paris, France
| | - Armelle Le Guelte
- CNRS; UMR8104; Paris, France ; Inserm; U1016; Paris, France ; Université Paris Descartes; Sorbonne Paris Cite; Paris, France
| | - Julie Gavard
- CNRS; UMR8104; Paris, France ; Inserm; U1016; Paris, France ; Université Paris Descartes; Sorbonne Paris Cite; Paris, France
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Semaphorin 3A upregulates FOXO 3a-dependent MelCAM expression leading to attenuation of breast tumor growth and angiogenesis. Oncogene 2014; 34:1584-95. [PMID: 24727891 DOI: 10.1038/onc.2014.79] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 01/19/2014] [Accepted: 02/18/2014] [Indexed: 12/16/2022]
Abstract
Semaphorin 3A (Sema 3A), a member of semaphorin family, serves as a guidance clue during embryonic development and is known as a candidate tumor suppressor that attenuates breast tumor progression by binding with its co-receptor, neuropilin-1 (NRP-1). However, the underlying mechanism by which Sema 3A suppresses breast tumor growth is still unexplored. In this study, we report that Sema 3A regulates phosphorylation and nuclear translocation of phosphatase and tensin homolog (PTEN) and FOXO 3a. Moreover, Sema 3A controls NRP-1-mediated PTEN-dependent FOXO 3a activation. Overexpression of PTEN and FOXO 3a enhances Sema 3A-induced attenuation of breast cancer cell migration. Chromatin immunoprecipitation and electrophoretic mobility shift assay data revealed that FOXO 3a regulates MelCAM at the transcriptional level. Furthermore, Sema 3A induces NRP-1-mediated MelCAM expression through PTEN and FOXO 3a. The data also showed that vascular endothelial growth factor-induced angiogenesis is inhibited by Sema 3A. Loss of or gain in function study revealed that Sema 3A modulates phosphorylation of PTEN and FOXO 3a and expression of MelCAM, leading to suppression of tumor growth and angiogenesis using in vivo mice model. Clinical specimen analysis revealed that reduced expression of Sema 3A and p-PTEN are correlated with enhanced breast cancer progression, further strengthening our in vitro and in vivo findings. Correlation of relapse-free survival of breast cancer patients (n=2878) with expression levels of Sema 3A, NRP-1, FOXO 3a and MelCAM were studied by Kaplan-Meier analysis. Statistical analysis revealed a close association between reduced expression of Sema 3A and MelCAM with that of poor patient's survival. Our study demonstrated a novel mechanism of regulation of tumor suppression by Sema 3A in coordination with a chain of tumor-suppressor genes, which in turn inhibits breast cancer cell migration, tumor growth and angiogenesis.
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Giacobini P, Parkash J, Campagne C, Messina A, Casoni F, Vanacker C, Langlet F, Hobo B, Cagnoni G, Gallet S, Hanchate NK, Mazur D, Taniguchi M, Mazzone M, Verhaagen J, Ciofi P, Bouret SG, Tamagnone L, Prevot V. Brain endothelial cells control fertility through ovarian-steroid-dependent release of semaphorin 3A. PLoS Biol 2014; 12:e1001808. [PMID: 24618750 PMCID: PMC3949669 DOI: 10.1371/journal.pbio.1001808] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 01/30/2014] [Indexed: 11/25/2022] Open
Abstract
Endothelial-cell–derived Sema3A promotes axonal outgrowth and plasticity and thereby regulates neurohormone release in the adult rodent brain in response to the ovarian cycle. Neuropilin-1 (Nrp1) guides the development of the nervous and vascular systems, but its role in the mature brain remains to be explored. Here we report that the expression of the 65 kDa isoform of Sema3A, the ligand of Nrp1, by adult vascular endothelial cells, is regulated during the ovarian cycle and promotes axonal sprouting in hypothalamic neurons secreting gonadotropin-releasing hormone (GnRH), the neuropeptide controlling reproduction. Both the inhibition of Sema3A/Nrp1 signaling and the conditional deletion of Nrp1 in GnRH neurons counteract Sema3A-induced axonal sprouting. Furthermore, the localized intracerebral infusion of Nrp1- or Sema3A-neutralizing antibodies in vivo disrupts the ovarian cycle. Finally, the selective neutralization of endothelial-cell Sema3A signaling in adult Sema3aloxP/loxP mice by the intravenous injection of the recombinant TAT-Cre protein alters the amplitude of the preovulatory luteinizing hormone surge, likely by perturbing GnRH release into the hypothalamo-hypophyseal portal system. Our results identify a previously unknown function for 65 kDa Sema3A-Nrp1 signaling in the induction of axonal growth, and raise the possibility that endothelial cells actively participate in synaptic plasticity in specific functional domains of the adult central nervous system, thus controlling key physiological functions such as reproduction. In the developing embryo, endothelial cells release chemotropic signals such as Semaphorin 3A (Sema3A) that, upon activation of its receptor Neuropilin-1 (Nrp1), regulate neuronal migration and axon guidance. However, whether endothelial cells in the adult brain retain the ability to secrete molecules that influence neuronal function is unknown. Here we show in the adult brain of rodents that vascular endothelial cells release Sema3A and that the amount released is regulated by the ovulatory cycle. Sema3A, in turn, promotes the outgrowth of axons of hypothalamic neurons that express Neuropilin-1 towards the endothelial wall of portal blood vessels. These neurons release there the neuropeptide that controls reproduction: gonadotropin-releasing hormone (GnRH). Notably, this endothelial-cell-mediated sprouting of GnRH axons regulates neuropeptide release at a key stage of the estrous cycle, the proestrus, when the surge of GnRH triggers ovulation. Thus, by promoting GnRH axonal growth in the adult brain, Sema3A/Neuropilin-1 plays a pivotal role in orchestrating the central control of reproduction. Our results suggest a model in which vascular endothelial cells are dynamic signaling components that relay peripheral information to the brain to control key physiological functions, including species survival.
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Affiliation(s)
- Paolo Giacobini
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Jyoti Parkash
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Céline Campagne
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Andrea Messina
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Filippo Casoni
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Charlotte Vanacker
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Fanny Langlet
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Barbara Hobo
- Netherlands institute for Neuroscience, Amsterdam, The Netherlands
- Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Gabriella Cagnoni
- Candiolo Cancer Institute - FPO (IRCCS) and University of Torino, Department of Oncology, Candiolo, Italy
| | - Sarah Gallet
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Naresh Kumar Hanchate
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Danièle Mazur
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
| | - Masahiko Taniguchi
- Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Massimiliano Mazzone
- Versalius Research Center, VIB, Laboratory of Molecular Oncology and Angiogenesis, Leuven, Belgium
- KU Keuven, Versalius Research Center, Leuven, Belgium
| | - Joost Verhaagen
- Netherlands institute for Neuroscience, Amsterdam, The Netherlands
- Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Philippe Ciofi
- INSERM, Neurocentre Magendie, U862, Université de Bordeaux, Bordeaux, France
| | - Sébastien G. Bouret
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
- The Saban Research Institute, Childrens Hospital Los Angeles, University of Southern California, Los Angeles, California, United States of America
| | - Luca Tamagnone
- Candiolo Cancer Institute - FPO (IRCCS) and University of Torino, Department of Oncology, Candiolo, Italy
| | - Vincent Prevot
- INSERM, Jean-Pierre Aubert Research Center, U837, Development and Plasticity of the Postnatal Brain, Lille, France
- UDSL, School of Medicine, Place de Verdun, Lille, France
- Institut de Médecine Prédictive et de Recherche Thérapeutique, IFR114, Lille, France
- * E-mail:
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Leibovich-Rivkin T, Liubomirski Y, Meshel T, Abashidze A, Brisker D, Solomon H, Rotter V, Weil M, Ben-Baruch A. The inflammatory cytokine TNFα cooperates with Ras in elevating metastasis and turns WT-Ras to a tumor-promoting entity in MCF-7 cells. BMC Cancer 2014; 14:158. [PMID: 24598028 PMCID: PMC4015419 DOI: 10.1186/1471-2407-14-158] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 02/06/2014] [Indexed: 02/08/2023] Open
Abstract
Background In the present study we determined the relative contribution of two processes to breast cancer progression: (1) Intrinsic events, such as activation of the Ras pathway and down-regulation of p53; (2) The inflammatory cytokines TNFα and IL-1β, shown in our published studies to be highly expressed in tumors of >80% of breast cancer patients with recurrent disease. Methods Using MCF-7 human breast tumor cells originally expressing WT-Ras and WT-p53, we determined the impact of the above-mentioned elements and cooperativity between them on the expression of CXCL8 (ELISA, qRT-PCR), a member of a “cancer-related chemokine cluster” that we have previously identified. Then, we determined the mechanisms involved (Ras-binding-domain assays, Western blot, luciferase), and tested the impact of Ras + TNFα on angiogenicity (chorioallantoic membrane assays) and on tumor growth at the mammary fat pad of mice and on metastasis, in vivo. Results Using RasG12V that recapitulates multiple stimulations induced by receptor tyrosine kinases, we found that RasG12V alone induced CXCL8 expression at the mRNA and protein levels, whereas down-regulation of p53 did not. TNFα and IL-1β potently induced CXCL8 expression and synergized with RasG12V, together leading to amplified CXCL8 expression. Testing the impact of WT-Ras, which is the common form in breast cancer patients, we found that WT-Ras was not active in promoting CXCL8; however, TNFα has induced the activation of WT-Ras: joining these two elements has led to cooperative induction of CXCL8 expression, via the activation of MEK, NF-κB and AP-1. Importantly, TNFα has led to increased expression of WT-Ras in an active GTP-bound form, with properties similar to those of RasG12V. Jointly, TNFα + Ras activities have given rise to increased angiogenesis and to elevated tumor cell dissemination to lymph nodes. Conclusions TNFα cooperates with Ras in promoting the metastatic phenotype of MCF-7 breast tumor cells, and turns WT-Ras into a tumor-supporting entity. Thus, in breast cancer patients the cytokine may rescue the pro-cancerous potential of WT-Ras, and together these two elements may lead to a more aggressive disease. These findings have clinical relevance, suggesting that we need to consider new therapeutic regimens that inhibit Ras and TNFα, in breast cancer patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Adit Ben-Baruch
- Department Cell Research and Immunology, George S, Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
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Zhou H, Wu A, Fu W, Lv Z, Zhang Z. Significance of semaphorin-3A and MMP-14 protein expression in non-small cell lung cancer. Oncol Lett 2014; 7:1395-1400. [PMID: 24765144 PMCID: PMC3997704 DOI: 10.3892/ol.2014.1920] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 02/11/2014] [Indexed: 12/16/2022] Open
Abstract
Semaphorin-3A is a chemorepellent guidance protein that is crucial in regulating the tumor microenvironment. MMP-14, a membrane-anchored matrix metalloproteinase, is closely associated with extracellular matrix (ECM) remodeling and cell migration in the progression of cancer metastasis. In the present study, the correlation between the expression levels of semaphorin-3A and MMP-14, and their subsequent prognostic significance in non-small cell lung cancer (NSCLC), was investigated. The expression of semaphorin-3A and MMP-14 protein levels was analyzed in 94 cases of NSCLC tissues and in 80 cases of normal lung tissues, using immunohistochemistry (IHC). Correlation and survival analysis were used to further investigate their association and prognostic value. The results revealed that the NSCLC tissues exhibited a lower expression of semaphorin-3A and a higher expression of MMP-14 than in the control lung tissues. The downregulation of semaphorin-3A and upregulation of MMP-14 may promote pleural invasion, lymph node metastasis, vascular invasion and proliferating cell nuclear antigen expression. The expression of semaphorin-3A was correlated with the maximum diameter of tumor. There was a negative correlation between the protein expression levels of semaphorin-3A and MMP-14 in NSCLC tissues. Furthermore, we identified that the patients with lower expression of semaphorin-3A and a higher expression of MMP-14 had worse disease prognosis. The data suggest that lower expression of semaphorin-3A and a higher expression of MMP-14 may promote occurrence and development in NSCLC and that the combined detection of semaphorin-3A and MMP-14 protein may be a helpful tool in predicting the prognosis of NSCLC.
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Affiliation(s)
- Haiying Zhou
- Department of Thoracic Surgery, Tianjin Chest Hospital, Tianjin Medical University, Tianjin 300070, P.R. China ; Department of Thoracic Surgery, Tangshan Worker Hospital, Hebei Medical University, Tangshan, Hebei 063000, P.R. China
| | - Aiping Wu
- Department of Pathology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Wei Fu
- Department of Thoracic Surgery, Tangshan Worker Hospital, Hebei Medical University, Tangshan, Hebei 063000, P.R. China
| | - Zheng Lv
- Department of Thoracic Surgery, Tangshan Worker Hospital, Hebei Medical University, Tangshan, Hebei 063000, P.R. China
| | - Zhiyong Zhang
- Department of Pathology, Tangshan Worker Hospital, Hebei Medical University, Tangshan, Hebei 063000, P.R. China
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56
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Thirant C, Gavard J, Junier MP, Chneiweiss H. Critical multiple angiogenic factors secreted by glioblastoma stem-like cells underline the need for combinatorial anti-angiogenic therapeutic strategies. Proteomics Clin Appl 2014; 7:79-90. [PMID: 23229792 DOI: 10.1002/prca.201200102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 10/31/2012] [Accepted: 11/14/2012] [Indexed: 01/06/2023]
Abstract
Glioblastomas are the most frequent adult primary brain tumors that still remain fatal despite major clinical efforts. As in other solid tumors, populations of glioblastoma stem-like cells (GSCs) endowed with tumor initiating and therapeutic resistance properties have been identified. Glioblastomas are highly vascularized tumors resulting in a rich dialog between GSCs and endothelial cells. In one direction, endothelial cells and their secreted proteins are able to sustain GSC properties while, in turn, GSCs can promote neoangiogenesis, modulate endothelial cell functions and may even transdifferentiate into endothelial cells. Accordingly, targeting tumor vasculature seems a promising issue despite incomplete and transient results obtained from anti-vascular endothelial growth factor therapeutic trials. Recent findings of novel GSC-secreted molecules with pro-angiogenic properties (Semaphorin 3A, hepatoma-derived growth factor) open the path to the design of a concerted attack of glioblastoma vasculature that could overcome the development of resistance to single-targeted therapies while keeping away the toxicity of the treatments.
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Affiliation(s)
- Cécile Thirant
- Leukemia and Stem Cell Biology Laboratory, Department of Hematological Medicine, Rayne Institute, King's College London, London, UK
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57
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Suzuki T, Hirakawa S, Shimauchi T, Ito T, Sakabe JI, Detmar M, Tokura Y. VEGF-A promotes IL-17A-producing γδ T cell accumulation in mouse skin and serves as a chemotactic factor for plasmacytoid dendritic cells. J Dermatol Sci 2014; 74:116-24. [PMID: 24485663 DOI: 10.1016/j.jdermsci.2013.12.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 12/27/2013] [Accepted: 12/27/2013] [Indexed: 01/07/2023]
Abstract
BACKGROUND IL-17-producing CD4(+) T (Th17) cells and their cytokines, IL-17A and IL-22, are deeply involved in the pathogenesis of psoriasis by stimulating epidermal keratinocytes to proliferate and to produce cytokines/chemokines and vascular endothelial growth factor (VEGF)-A. Plasmacytoid dendritic cells (pDCs), infiltrating in psoriatic lesions, are known to exacerbate the Th17-mediated pathogenesis of psoriasis. OBJECTIVE To address the initiative role of VEGF-A in the development of psoriasis and the pDC accumulation. METHODS Numerical changes and VEGF receptor 1 (VEGFR1) and VEGFR2 expressions were investigated in skin-infiltrating T cells and pDCs of K14-VEGF-A transgenic (Tg) and wild type (WT) mice. The chemotactic properties of VEGF-A for purified splenic pDCs were also evaluated by real-time chemotaxis assay. RESULTS By flow cytometry and immunohistochemistry, we observed that the number of dermal IL-17A(+) γδ T cells, but not CD4(+) T cells, was increased in VEGF-A Tg mice, suggesting that the main source of IL-17A was γδ T cells. Moreover, we identified pDCs as 440c(+) cells by immunohistochemistry and as PDCA-1(+)B220(+) cells by flow cytometry, and found that pDCs infiltrated at a higher frequency in VEGF-A Tg than WT mice. pDCs, but not γδ T cells, isolated from the skin expressed VEGFR1 and VEGFR2. Freshly isolated splenic pDCs expressed both receptors after 48-h cultivation. pDCs did not produce cytokines in response to VEGF-A, however, they had a strong velocity of chemotaxis toward VEGF-A at a comparable level to chemerin. CONCLUSIONS These findings suggest that VEGF-A functions as not only a downstream enhancer but also an upstream initiator by chemoattracting pDCs in psoriatic lesions.
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Affiliation(s)
- Takahiro Suzuki
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Satoshi Hirakawa
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takatoshi Shimauchi
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Taisuke Ito
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Jun-ichi Sakabe
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Michael Detmar
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Yoshiki Tokura
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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Mogie G, Shanks K, Nkyimbeng-Takwi EH, Smith E, Davila E, Lipsky MM, DeTolla LJ, Keegan AD, Chapoval SP. Neuroimmune semaphorin 4A as a drug and drug target for asthma. Int Immunopharmacol 2013; 17:568-75. [PMID: 23994348 DOI: 10.1016/j.intimp.2013.08.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 07/23/2013] [Accepted: 08/08/2013] [Indexed: 11/16/2022]
Abstract
Neuroimmune semaphorin 4A (Sema4A) has been shown to play an important costimulatory role in T cell activation and regulation of Th1-mediated diseases such as multiple sclerosis (MS), experimental autoimmune encephalomyelitis (EAE), and experimental autoimmune myocarditis (EAM). Sema4A has three functional receptors, Tim-2 expressed on CD4+ T cells, Th2 cells in particular, and Plexin B1 and D1 predominantly expressed on epithelial and endothelial cells, correspondingly. We recently showed that Sema4A has a complex expression pattern in lung tissue in a mouse model of asthma. We and others have shown that corresponding Plexin expression can be found on immune cells as well. Moreover, we demonstrated that Sema4A-deficient mice displayed significantly higher lung local and systemic allergic responses pointing to its critical regulatory role in the disease. To determine the utility of Sema4A as a novel immunotherapeutic, we introduced recombinant Sema4A protein to the allergen-sensitized WT and Sema4A(-/-) mice before allergen challenge. We observed significant reductions in the allergic inflammatory lung response in Sema4A-treated mice as judged by tissue inflammation including eosinophilia and mucus production. Furthermore, we demonstrated that in vivo administration of anti-Tim2 Ab led to a substantial upregulation of allergic inflammation in WT mouse lungs. These data highlight the potential to develop Sema4A as a new therapeutic for allergic airway disease.
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Affiliation(s)
- G Mogie
- Center for Vascular and Inflammatory Diseases, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
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Aguilera KY, Brekken RA. Recruitment and retention: factors that affect pericyte migration. Cell Mol Life Sci 2013; 71:299-309. [PMID: 23912898 DOI: 10.1007/s00018-013-1432-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/30/2013] [Accepted: 07/22/2013] [Indexed: 02/07/2023]
Abstract
Pericytes are critical for vascular morphogenesis and contribute to several pathologies, including cancer development and progression. The mechanisms governing pericyte migration and differentiation are complex and have not been fully established. Current literature suggests that platelet-derived growth factor/platelet-derived growth factor receptor-β, sphingosine 1-phosphate/endothelial differentiation gene-1, angiopoietin-1/tyrosine kinase with immunoglobulin-like and EGF-like domains 2, angiopoietin-2/tyrosine kinase with immunoglobulin-like and EGF-like domains 2, transforming growth factor β/activin receptor-like kinase 1, transforming growth factor β/activin receptor-like kinase 5, Semaphorin-3A/Neuropilin, and matrix metalloproteinase activity regulate the recruitment of pericytes to nascent vessels. Interestingly, many of these pathways are directly affected by secreted protein acidic and rich in cysteine (SPARC). Here, we summarize the function of these factors in pericyte migration and discuss if and how SPARC might influence these activities and thus provide an additional layer of control for the recruitment of vascular support cells. Additionally, the consequences of targeted inhibition of pericytes in tumors and the current understanding of pericyte recruitment in pathological environments are discussed.
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Affiliation(s)
- Kristina Y Aguilera
- Division of Surgical Oncology, Department of Surgery, Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd, Dallas, TX, 75390-8593, USA
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60
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Rehman M, Tamagnone L. Semaphorins in cancer: biological mechanisms and therapeutic approaches. Semin Cell Dev Biol 2013; 24:179-89. [PMID: 23099250 DOI: 10.1016/j.semcdb.2012.10.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 10/15/2012] [Accepted: 10/17/2012] [Indexed: 01/07/2023]
Abstract
The hallmarks of cancer include multiple alterations in the physiological processes occurring in normal tissues, such as cell proliferation, apoptosis, and restricted cell migration. These aberrant behaviors are due to genetic and epigenetic changes that affect signaling pathways controlling cancer cells, as well as the surrounding "normal" cells in the tumor microenvironment. Semaphorins and their receptors (mainly plexins and neuropilins) are aberrantly expressed in human tumors, and multiple family members are emerging as pivotal signals deregulated in cancer. Notably, different semaphorins can promote or inhibit tumor progression, depending on the implicated receptor complexes and responsive cell type. The important role of semaphorin signals in the regulation of tumor angiogenesis, invasion and metastasis has initiated multiple experimental approaches aimed at targeting these pathways to inhibit cancer.
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Affiliation(s)
- Michael Rehman
- Institute for Cancer Research at Candiolo (IRC@C), University of Torino-Dept. of Oncology, 10060 Candiolo, Italy
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61
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Gu C, Giraudo E. The role of semaphorins and their receptors in vascular development and cancer. Exp Cell Res 2013; 319:1306-16. [PMID: 23422037 DOI: 10.1016/j.yexcr.2013.02.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 02/06/2013] [Indexed: 02/07/2023]
Abstract
Semaphorins (Semas) are a large family of traditional axon guidance molecules. Through interactions with their receptors, Plexins and Neuropilins, Semas play critical roles in a continuously growing list of diverse biological systems. In this review, we focus on their function in regulating vascular development. In addition, over the past few years a number of findings have shown the crucial role that Semas and their receptors play in the regulation of cancer progression and tumor angiogenesis. In particular, Semas control tumor progression by directly influencing the behavior of cancer cells or, indirectly, by modulating angiogenesis and the function of other cell types in the tumor microenvironment (i.e., inflammatory cells and fibroblasts). Some Semas can activate or inhibit tumor progression and angiogenesis, while others may have the opposite effect depending on specific post-translational modifications. Here we will also discuss the diverse biological effects of Semas and their receptor complexes on cancer progression as well as their impact on the tumor microenvironment.
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Affiliation(s)
- Chenghua Gu
- Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115, USA.
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Serini G, Bussolino F, Maione F, Giraudo E. Class 3 semaphorins: physiological vascular normalizing agents for anti-cancer therapy. J Intern Med 2013. [PMID: 23198760 DOI: 10.1111/joim.12017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Findings from preclinical and clinical studies show that vascular normalization represents a novel strategy to enhance the efficacy of and overcome the acquired resistance to anti-angiogenic therapies in cancer. Several mechanisms of tumour vessel normalization have been revealed. Amongst them, secreted class 3 semaphorins (Sema3), which regulate axon guidance and angiogenesis, have been recently identified as novel vascular normalizing agents that inhibit metastatic dissemination by restoring vascular function. Here, we discuss the different biological functions and mechanisms of action of Sema3 in the context of tumour vascular normalization, and their impact on the different cellular components of the tumour microenvironment.
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Affiliation(s)
- G Serini
- Institute for Cancer Research at Candiolo (IRCC), University of Torino, Turin, Italy
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Curiel-Lewandrowski C, Chen SC, Swetter SM. Screening and prevention measures for melanoma: is there a survival advantage? Curr Oncol Rep 2013; 14:458-67. [PMID: 22907282 DOI: 10.1007/s11912-012-0256-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Controversy has emerged over the past decades regarding the value and impact of melanoma screening to detect early stage disease for improved prognosis. Those questioning the benefits of prevention efforts base their arguments on the absence of prospective, randomized studies demonstrating decreased melanoma mortality to justify the cost associated with screening and educational campaigns. For those in favor of melanoma screening, the lack of proven survival benefit is not a justification to abandon this approach, but rather a reflection of the lack of resources necessary to conduct a long-term trial. In 2009, the US Preventive Services Task Force (USPSTF)report did not recommend routine primary care screening for the general population given the absence of evidence. However, since the USPSTF report, a series of new studies are available, which support the potential benefit of screening and have the potential to significantly impact current policies regarding skin cancer screening, particularly for melanoma.
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Tamagnone L. Emerging role of semaphorins as major regulatory signals and potential therapeutic targets in cancer. Cancer Cell 2012; 22:145-52. [PMID: 22897846 DOI: 10.1016/j.ccr.2012.06.031] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 05/16/2012] [Accepted: 06/29/2012] [Indexed: 02/07/2023]
Abstract
Semaphorins are mainly known as guidance signals in development, acting through receptors called Plexins. However, their role in cancer is rapidly emerging in the regulation of tumor angiogenesis, tumor growth, cancer cell invasiveness, and metastatic spreading. Intriguingly, activated plexins can transactivate receptor tyrosine kinases, such as MET, VEGFR2, FGFR2, and ERBB2, and lead to distinctive effects in a cell-context-dependent manner. Moreover, certain semaphorins concomitantly target endothelial and cancer cells, and can achieve remarkable inhibition of angiogenesis and tumor growth, associated with anti-metastatic activity. Altogether, these data validate the identification of semaphorin signals as promising therapeutic targets in cancer.
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Affiliation(s)
- Luca Tamagnone
- IRCC-Institute for Cancer Research at Candiolo, Candiolo, Italy.
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Goshima Y, Sasaki Y, Yamashita N, Nakamura F. Class 3 semaphorins as a therapeutic target. Expert Opin Ther Targets 2012; 16:933-44. [DOI: 10.1517/14728222.2012.710201] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Le Guelte A, Galan-Moya EM, Dwyer J, Treps L, Kettler G, Hebda JK, Dubois S, Auffray C, Chneiweiss H, Bidere N, Gavard J. Semaphorin 3A elevates endothelial cell permeability through PP2A inactivation. J Cell Sci 2012; 125:4137-46. [DOI: 10.1242/jcs.108282] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
VE-cadherin-mediated cell-cell junction weakening increases paracellular permeability in response to both angiogenic and inflammatory stimuli. Although Semaphorin 3A has emerged as one of the few known anti-angiogenic factors to exhibit pro-permeability activity, little is known about how it triggers vascular leakage. Here we report that Semaphorin 3A induced VE-cadherin serine phosphorylation and internalization, cell-cell junction destabilization, and loss of barrier integrity in brain endothelial cells. In addition, high-grade glioma-isolated tumour initiating cells were found to secrete Semaphorin 3A, which promoted brain endothelial monolayer permeability. From a mechanistic standpoint, Semaphorin 3A impinged upon the basal activity of the serine phosphatase PP2A and disrupted PP2A interaction with VE-cadherin, leading to cell-cell junction disorganization and increased permeability. Accordingly, both pharmacological inhibition and siRNA-based knockdown of PP2A mimicked Semaphorin 3A effects on VE-cadherin. Hence, local Semaphorin 3A production impacts on the PP2A/VE-cadherin equilibrium and contributes to elevated vascular permeability.
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