1
|
Omene EE, Easaw J. Management of Bevacizumab-Induced Proteinuria Using an Angiotensin Receptor Blocker (ARB) in a Neurofibromatosis Type 2 (NF-2) Patient With Vestibular Schwannoma. Cureus 2023; 15:e46202. [PMID: 37905291 PMCID: PMC10613429 DOI: 10.7759/cureus.46202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2023] [Indexed: 11/02/2023] Open
Abstract
Neurofibromatosis type 2 (NF-2) is a genetic condition that by definition includes bilateral vestibular schwannoma, a non-malignant lesion also known as acoustic neuroma. Patients often develop hearing impairment and hearing loss as a result of the involvement of the vestibulocochlear nerve bilaterally as well as attempts at surgical repair. A common treatment for NF-2-mediated schwannoma is the antiangiogenic agent, bevacizumab. In many cases, patients require prolonged and even lifelong treatment with bevacizumab to control schwannoma growth. However, long-term use of bevacizumab can be associated with multiple side effects including hypertension and proteinuria including nephrotic syndrome (>3g of protein excreted in the urine in 24 hours). In these situations, the challenge with discontinuing prolonged bevacizumab can be rapid tumor growth and worsening hearing loss. Pre-clinical data suggests that hearing loss can be prevented following treatment with the angiotensin receptor blocker (ARB), losartan, in an animal model of NF-2. ARBs are already established in nephrology guidelines to treat proteinuria and hypertension. Here, we present a patient with NF-2 who developed nephrotic syndrome while on bevacizumab. Attempts to discontinue bevacizumab resulted in near-immediate hearing loss. Treatment with the ARB telmisartan together with bevacizumab resulted in improved hearing, reduced proteinuria, and controlled hypertension.
Collapse
Affiliation(s)
| | - Jay Easaw
- Medical Oncology, Cross Cancer Institute, Edmonton, CAN
| |
Collapse
|
2
|
Nourbakhsh A, Dinh CT. Updates on Tumor Biology in Vestibular Schwannoma. Otolaryngol Clin North Am 2023; 56:421-434. [PMID: 37121611 DOI: 10.1016/j.otc.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Vestibular schwannomas (VSs) are benign tumors that develop after biallelic inactivation of the neurofibromatosis type 2 (NF2) gene that encodes the tumor suppressor merlin. Merlin inactivation leads to cell proliferation by dysregulation of receptor tyrosine kinase signaling and other intracellular pathways. In VS without NF2 mutations, dysregulation of non-NF2 genes can promote pathways favoring cell proliferation and tumorigenesis. The tumor microenvironment of VS consists of multiple cell types that influence VS tumor biology through complex intercellular networking and communications.
Collapse
Affiliation(s)
- Aida Nourbakhsh
- Department of Otolaryngology, University of Miami Miller School of Medicine, 1120 Northwest 14th Street, Suite 579, Miami, FL 33136, USA; Sylvester Comprehensive Cancer Center, 1475 Northwest 12th Avenue, Miami, FL 33136, USA
| | - Christine T Dinh
- Department of Otolaryngology, University of Miami Miller School of Medicine, 1120 Northwest 14th Street, Suite 579, Miami, FL 33136, USA; Sylvester Comprehensive Cancer Center, 1475 Northwest 12th Avenue, Miami, FL 33136, USA.
| |
Collapse
|
3
|
Ma H, Liu M, Fu R, Feng J, Ren H, Cao J, Shi M. Phase separation in innate immune response and inflammation-related diseases. Front Immunol 2023; 14:1086192. [PMID: 36860877 PMCID: PMC9970293 DOI: 10.3389/fimmu.2023.1086192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/25/2023] [Indexed: 02/15/2023] Open
Abstract
Inflammation induced by nonspecific pathogenic or endogenous danger signals is an essential mechanism of innate immune response. The innate immune responses are rapidly triggered by conserved germline-encoded receptors that recognize broad patterns indicative of danger, with subsequent signal amplification by modular effectors, which have been the subject of intense investigation for many years. Until recently, however, the critical role of intrinsic disorder-driven phase separation in facilitating innate immune responses went largely unappreciated. In this review, we discuss emerging evidences that many innate immune receptors, effectors, and/or interactors function as "all-or-nothing" switch-like hubs to stimulate acute and chronic inflammation. By concentrating or relegating modular signaling components to phase-separated compartments, cells construct flexible and spatiotemporal distributions of key signaling events to ensure rapid and effective immune responses to a myriad of potentially harmful stimuli.
Collapse
Affiliation(s)
- Huihui Ma
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Mingxi Liu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Rao Fu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Jia Feng
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Haoran Ren
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Jingyan Cao
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Ming Shi
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| |
Collapse
|
4
|
Bae JH, Yang MJ, Jeong SH, Kim J, Hong SP, Kim JW, Kim YH, Koh GY. Gatekeeping role of Nf2/Merlin in vascular tip EC induction through suppression of VEGFR2 internalization. SCIENCE ADVANCES 2022; 8:eabn2611. [PMID: 35687678 PMCID: PMC9187237 DOI: 10.1126/sciadv.abn2611] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 04/28/2022] [Indexed: 06/15/2023]
Abstract
In sprouting angiogenesis, the precise mechanisms underlying how intracellular vascular endothelial growth factor receptor 2 (VEGFR2) signaling is higher in one endothelial cell (EC) compared with its neighbor and acquires the tip EC phenotype under a similar external cue are elusive. Here, we show that Merlin, encoded by the neurofibromatosis type 2 (NF2) gene, suppresses VEGFR2 internalization depending on VE-cadherin density and inhibits tip EC induction. Accordingly, endothelial Nf2 depletion promotes tip EC induction with excessive filopodia by enhancing VEGFR2 internalization in both the growing and matured vessels. Mechanistically, Merlin binds to the VEGFR2-VE-cadherin complex at cell-cell junctions and reduces VEGFR2 internalization-induced downstream signaling during tip EC induction. As a consequence, nonfunctional excessive sprouting occurs during tumor angiogenesis in EC-specific Nf2-deleted mice, leading to delayed tumor growth. Together, Nf2/Merlin is a crucial molecular gatekeeper for tip EC induction, capillary integrity, and proper tumor angiogenesis by suppressing VEGFR2 internalization.
Collapse
Affiliation(s)
- Jung Hyun Bae
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Myung Jin Yang
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Seung-hwan Jeong
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - JungMo Kim
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Seon Pyo Hong
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Jin Woo Kim
- Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea
| | - Yoo Hyung Kim
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Gou Young Koh
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| |
Collapse
|
5
|
Tamura R, Toda M. A Critical Overview of Targeted Therapies for Vestibular Schwannoma. Int J Mol Sci 2022; 23:5462. [PMID: 35628268 PMCID: PMC9143502 DOI: 10.3390/ijms23105462] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 12/10/2022] Open
Abstract
Vestibular schwannoma (VS) is a benign tumor that originates from Schwann cells in the vestibular component. Surgical treatment for VS has gradually declined over the past few decades, especially for small tumors. Gamma knife radiosurgery has become an accepted treatment for VS, with a high rate of tumor control. For neurofibromatosis type 2 (NF2)-associated VS resistant to radiotherapy, vascular endothelial growth factor (VEGF)-A/VEGF receptor (VEGFR)-targeted therapy (e.g., bevacizumab) may become the first-line therapy. Recently, a clinical trial using a VEGFR1/2 peptide vaccine was also conducted in patients with progressive NF2-associated schwannomas, which was the first immunotherapeutic approach for NF2 patients. Targeted therapies for the gene product of SH3PXD2A-HTRA1 fusion may be effective for sporadic VS. Several protein kinase inhibitors could be supportive to prevent tumor progression because merlin inhibits signaling by tyrosine receptor kinases and the activation of downstream pathways, including the Ras/Raf/MEK/ERK and PI3K/Akt/mTORC1 pathways. Tumor-microenvironment-targeted therapy may be supportive for the mainstays of management. The tumor-associated macrophage is the major component of immunosuppressive cells in schwannomas. Here, we present a critical overview of targeted therapies for VS. Multimodal therapy is required to manage patients with refractory VS.
Collapse
Affiliation(s)
- Ryota Tamura
- Department of Neurosurgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan;
| | | |
Collapse
|
6
|
Ota Y, Liao E, Capizzano AA, Baba A, Kurokawa R, Kurokawa M, Srinivasan A. Neurofibromatosis type 2 versus sporadic vestibular schwannoma: The utility of MR diffusion and dynamic contrast-enhanced imaging. J Neuroimaging 2022; 32:554-560. [PMID: 35037337 DOI: 10.1111/jon.12966] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 12/27/2021] [Accepted: 12/28/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE The goal of this study was to assess the utility of diffusion-weighted imaging (DWI) and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) to distinguish sporadic vestibular schwannomas (VSs) from those related to neurofibromatosis type 2 (NF2). METHODS We retrospectively reviewed 265 patients pathologically diagnosed with VSs between January 2015 and October 2020 in a single institution. There were 28 patients (male: 19, female: 9; age 11-67 years) including 23 sporadic and five NF2-related VSs, who had pretreatment DWI and DCE-MRI. Normalized mean apparent diffusion coefficient (nADCmean) and DCE-MRI parameters along with tumor characteristics were compared between sporadic and NF2-related VSs as appropriate. The diagnostic performances were calculated based on the receiver operating characteristic curve analysis for the values that showed significant differences. To identify significant modalities, multivariate logistic regression analysis was performed using nADCmean and the combination of statistically significant DCE-MRI parameters. RESULTS NADCmean, fractional volume of extracellular space (Ve), and forward volume transfer constant (Ktrans) were significantly different between sporadic and NF2-related VSs (nADCmean: median 1.62 vs. 1.16, P = .002; Ve: median 0.40 vs. 0.66, P = .007; Ktrans: median 0.17 vs. 0.33, P = .007), whereas fractional plasma volume (Vp), reverse reflux rate constant (Kep), and tumor characteristics were not. The diagnostic performances of nADCmean, Ve, and Ktrans were 0.93, 0.90, and 0.90 area under the curves with cutoffs of 1.46, 0.51, and 0.29, respectively. nADCmean and the combination of Ve and Ktrans were both chosen as significant differentiators by multivariate logistic regression analysis (P = .027). CONCLUSIONS DWI and DCE-MRI are both promising modalities to distinguish sporadic and NF2-related VSs.
Collapse
Affiliation(s)
- Yoshiaki Ota
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Eric Liao
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Aristides A Capizzano
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Akira Baba
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Ryo Kurokawa
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Mariko Kurokawa
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Ashok Srinivasan
- Division of Neuroradiology, Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| |
Collapse
|
7
|
Valentini E, Di Martile M, Del Bufalo D, D'Aguanno S. SEMAPHORINS and their receptors: focus on the crosstalk between melanoma and hypoxia. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:131. [PMID: 33858502 PMCID: PMC8050914 DOI: 10.1186/s13046-021-01929-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/25/2021] [Indexed: 12/11/2022]
Abstract
Hypoxia, a condition of oxygen deprivation, is considered a hallmark of tumor microenvironment regulating several pathways and promoting cancer progression and resistance to therapy. Semaphorins, a family of about 20 secreted, transmembrane and GPI-linked glycoproteins, and their cognate receptors (plexins and neuropilins) play a pivotal role in the crosstalk between cancer and stromal cells present in the tumor microenvironment. Many studies reported that some semaphorins are involved in the development of a permissive tumor niche, guiding cell-cell communication and, consequently, the development and progression, as well as the response to therapy, of different cancer histotypes, including melanoma. In this review we will summarize the state of art of semaphorins regulation by hypoxic condition in cancer with different origin. We will also describe evidence about the ability of semaphorins to affect the expression and activity of transcription factors activated by hypoxia, such as hypoxia-inducible factor-1. Finally, we will focus our attention on findings reporting the role of semaphorins in melanocytes transformation, melanoma progression and response to therapy. Further studies are necessary to understand the mechanisms through which semaphorins induce their effect and to shed light on the possibility to use semaphorins or their cognate receptors as prognostic markers and/or therapeutic targets in melanoma or other malignancies.
Collapse
Affiliation(s)
- Elisabetta Valentini
- Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Via Chianesi 53 (00144), Rome, Italy
| | - Marta Di Martile
- Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Via Chianesi 53 (00144), Rome, Italy
| | - Donatella Del Bufalo
- Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Via Chianesi 53 (00144), Rome, Italy.
| | - Simona D'Aguanno
- Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Via Chianesi 53 (00144), Rome, Italy
| |
Collapse
|
8
|
Vascular Endothelial Growth Factor: A Translational View in Oral Non-Communicable Diseases. Biomolecules 2021; 11:biom11010085. [PMID: 33445558 PMCID: PMC7826734 DOI: 10.3390/biom11010085] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/08/2021] [Accepted: 01/08/2021] [Indexed: 02/06/2023] Open
Abstract
Vascular endothelial growth factors (VEGFs) are vital regulators of angiogenesis that are expressed in response to soluble mediators, such as cytokines and growth factors. Their physiologic functions include blood vessel formation, regulation of vascular permeability, stem cell and monocyte/macrophage recruitment and maintenance of bone homeostasis and repair. In addition, angiogenesis plays a pivotal role in chronic pathologic conditions, such as tumorigenesis, inflammatory immune diseases and bone loss. According to their prevalence, morbidity and mortality, inflammatory diseases affecting periodontal tissues and oral cancer are relevant non-communicable diseases. Whereas oral squamous cell carcinoma (OSCC) is considered one of the most common cancers worldwide, destructive inflammatory periodontal diseases, on the other hand, are amongst the most prevalent chronic inflammatory conditions affecting humans and also represent the main cause of tooth loss in adults. In the recent years, while knowledge regarding the role of VEGF signaling in common oral diseases is expanding, new potential translational applications emerge. In the present narrative review we aim to explore the role of VEGF signaling in oral cancer and destructive periodontal inflammatory diseases, with emphasis in its translational applications as potential biomarkers and therapeutic targets.
Collapse
|
9
|
Zhang X, Shao S, Li L. Characterization of Class-3 Semaphorin Receptors, Neuropilins and Plexins, as Therapeutic Targets in a Pan-Cancer Study. Cancers (Basel) 2020; 12:cancers12071816. [PMID: 32640719 PMCID: PMC7409005 DOI: 10.3390/cancers12071816] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/03/2020] [Indexed: 12/19/2022] Open
Abstract
Class-3 semaphorins (SEMA3s), initially characterized as axon guidance cues, have been recognized as key regulators for immune responses, angiogenesis, tumorigenesis and drug responses. The functions of SEMA3s are attributed to the activation of downstream signaling cascades mainly mediated by cell surface receptors neuropilins (NRPs) and plexins (PLXNs), yet their roles in human cancers are not completely understood. Here, we provided a detailed pan-cancer analysis of NRPs and PLXNs in their expression, and association with key signal transducers, patient survival, tumor microenvironment (TME), and drug responses. The expression of NRPs and PLXNs were dysregulated in many cancer types, and the majority of them were further dysregulated in metastatic tumors, indicating a role in metastatic progression. Importantly, the expression of these genes was frequently associated with key transducers, patient survival, TME, and drug responses; however, the direction of the association varied for the particular gene queried and the specific cancer type/subtype tested. Specifically, NRP1, NRP2, PLXNA1, PLXNA3, PLXNB3, PLXNC1, and PLXND1 were primarily associated with aggressive phenotypes, whereas the rest were more associated with favorable prognosis. These data highlighted the need to study each as a separate entity in a cancer type- and subtype-dependent manner.
Collapse
Affiliation(s)
- Xiaoli Zhang
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, 320B Lincoln Tower, 1800 Cannon Dr., Columbus, OH 43210, USA;
- Correspondence:
| | - Shuai Shao
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH 43201, USA;
| | - Lang Li
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, 320B Lincoln Tower, 1800 Cannon Dr., Columbus, OH 43210, USA;
| |
Collapse
|
10
|
Sun X, Li S, Gan X, Chen K, Yang D, Yang Y. NF2 deficiency accelerates neointima hyperplasia following vascular injury via promoting YAP-TEAD1 interaction in vascular smooth muscle cells. Aging (Albany NY) 2020; 12:9726-9744. [PMID: 32422606 PMCID: PMC7288949 DOI: 10.18632/aging.103240] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 03/31/2020] [Indexed: 01/12/2023]
Abstract
Neurofibromin 2 (NF2), a potent tumor suppressor, is reported to inhibit proliferation in several cell types. The role of NF2 in neointima hyperplasia after vascular injury is unknown. We explored the role of NF2 in proliferation, migration of vascular smooth muscle cell (VSMC) and neointima hyperplasia after vascular injury. NF2 phosphorylation was elevated in VSMC subjected to platelet-derived growth factor (PDGF)-BB and in artery subjected to vascular injury. Mice deficient for Nf2 in VSMC showed enhanced neointima hyperplasia after injury, increased proliferation and migration of VSMC after PDGF-BB treatment. Mechanistically, we observed increased nuclear p-NF2, declined p-Yes-Associated Protein (YAP), nuclear translocation of YAP after PDGF-BB treatment or injury. NF2 knockdown or YAP overexpression showed similar phenotype in VSMC proliferation, migration and neointima hyperplasia. YAP inhibition abolished the above effects mediated by NF2 knockdown. Finally, NF2 knockdown further promoted YAP-TEA Domain Transcription Factor 1 (TEAD1) interaction after PDGF-BB treatment. Inhibition of TEAD1 blocked PDGF-BB-induced VSMC proliferation and migration, which were not reversed by either NF2 knockdown or YAP overexpression. In conclusion, NF2 knockdown promotes VSMC proliferation, migration and neointima hyperplasia after vascular injury via inducing YAP-TEAD1 interaction.
Collapse
Affiliation(s)
- Xiongshan Sun
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Shuang Li
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Xueqing Gan
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Ken Chen
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Dachun Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Yongjian Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu 610083, China
| |
Collapse
|
11
|
Neuropilin: Handyman and Power Broker in the Tumor Microenvironment. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1223:31-67. [PMID: 32030684 DOI: 10.1007/978-3-030-35582-1_3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Neuropilin-1 and neuropilin-2 form a small family of transmembrane receptors, which, due to the lack of a cytosolic protein kinase domain, act primarily as co-receptors for various ligands. Performing at the molecular level both the executive and organizing functions of a handyman as well as of a power broker, they are instrumental in controlling the signaling of various receptor tyrosine kinases, integrins, and other molecules involved in the regulation of physiological and pathological angiogenic processes. In this setting, the various neuropilin ligands and interaction partners on various cells of the tumor microenvironment, such as cancer cells, endothelial cells, cancer-associated fibroblasts, and immune cells, are surveyed. The suitability of various neuropilin-targeting substances and the intervention in neuropilin-mediated interactions is considered as a possible building block of tumor therapy.
Collapse
|
12
|
Padget RL, Mohite SS, Hoog TG, Justis BS, Green BE, Udan RS. Hemodynamic force is required for vascular smooth muscle cell recruitment to blood vessels during mouse embryonic development. Mech Dev 2019; 156:8-19. [PMID: 30796970 DOI: 10.1016/j.mod.2019.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 01/16/2019] [Accepted: 02/16/2019] [Indexed: 12/13/2022]
Abstract
Blood vessel maturation, which is characterized by the investment of vascular smooth muscle cells (vSMCs) around developing blood vessels, begins when vessels remodel into a hierarchy of proximal arteries and proximal veins that branch into smaller distal capillaries. The ultimate result of maturation is formation of the tunica media-the middlemost layer of a vessel that is composed of vSMCs and acts to control vessel integrity and vascular tone. Though many studies have implicated the role of various signaling molecules in regulating maturation, no studies have determined a role for hemodynamic force in the regulation of maturation in the mouse. In the current study, we provide evidence that a hemodynamic force-dependent mechanism occurs in the mouse because reduced blood flow mouse embryos exhibited a diminished or absent coverage of vSMCs around vessels, and in normal-flow embryos, extent of coverage correlated to the amount of blood flow that vessels were exposed to. We also determine that the cellular mechanism of force-induced maturation was not by promoting vSMC differentiation/proliferation, but instead involved the recruitment of vSMCs away from neighboring low-flow distal capillaries towards high-flow vessels. Finally, we hypothesize that hemodynamic force may regulate expression of specific signaling molecules to control vSMC recruitment to high-flow vessels, as reduction of flow results in the misexpression of Semaphorin 3A, 3F, 3G, and the Notch target gene Hey1, all of which are implicated in controlling vessel maturation. This study reveals another role for hemodynamic force in regulating blood vessel development of the mouse, and opens up a new model to begin elucidating mechanotransduction pathways regulating vascular maturation.
Collapse
Affiliation(s)
- Rachel L Padget
- Department of Biology, Missouri State University, United States of America
| | - Shilpa S Mohite
- Department of Biology, Missouri State University, United States of America
| | - Tanner G Hoog
- Department of Biology, Missouri State University, United States of America
| | - Blake S Justis
- Department of Biology, Missouri State University, United States of America
| | - Bruce E Green
- Department of Biology, Missouri State University, United States of America
| | - Ryan S Udan
- Department of Biology, Missouri State University, United States of America.
| |
Collapse
|
13
|
Niland S, Eble JA. Neuropilins in the Context of Tumor Vasculature. Int J Mol Sci 2019; 20:ijms20030639. [PMID: 30717262 PMCID: PMC6387129 DOI: 10.3390/ijms20030639] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/23/2019] [Accepted: 01/29/2019] [Indexed: 01/09/2023] Open
Abstract
Neuropilin-1 and Neuropilin-2 form a small family of plasma membrane spanning receptors originally identified by the binding of semaphorin and vascular endothelial growth factor. Having no cytosolic protein kinase domain, they function predominantly as co-receptors of other receptors for various ligands. As such, they critically modulate the signaling of various receptor tyrosine kinases, integrins, and other molecules involved in the regulation of physiological and pathological angiogenic processes. This review highlights the diverse neuropilin ligands and interacting partners on endothelial cells, which are relevant in the context of the tumor vasculature and the tumor microenvironment. In addition to tumor cells, the latter contains cancer-associated fibroblasts, immune cells, and endothelial cells. Based on the prevalent neuropilin-mediated interactions, the suitability of various neuropilin-targeted substances for influencing tumor angiogenesis as a possible building block of a tumor therapy is discussed.
Collapse
Affiliation(s)
- Stephan Niland
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany.
| | - Johannes A Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany.
| |
Collapse
|
14
|
Omarjee L, Fortrat JO, Larralde A, Pabic EL, Kauffenstein G, Laot M, Navasiolava N, Mention PJ, Carrillo Linares JL, Valdivielso P, Vanakker OM, Mahé G, Martin L, Lefthériotis G. Internal Carotid Artery Hypoplasia: A New Clinical Feature in Pseudoxanthoma Elasticum. J Stroke 2019; 21:108-111. [PMID: 30732446 PMCID: PMC6372903 DOI: 10.5853/jos.2018.02705] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/01/2018] [Indexed: 12/22/2022] Open
Affiliation(s)
- Loukman Omarjee
- Vascular Medicine Department, INSERM CIC1414, Rennes, France.,PXE Reference Center, University Hospital of Angers, Angers, France.,MitoVasc Institute, UMR CNRS 6015-UMR INSERM 1083, Angers University, Angers, France
| | | | - Antoine Larralde
- Radiology and Medical Imaging Department, Rennes University Hospital, Rennes, France
| | - Estelle Le Pabic
- Department of Biostatistics and Methodology, Rennes University Hospital, Rennes, France
| | - Gilles Kauffenstein
- PXE Reference Center, University Hospital of Angers, Angers, France.,MitoVasc Institute, UMR CNRS 6015-UMR INSERM 1083, Angers University, Angers, France
| | - Maxence Laot
- Radiology and Medical Imaging Department, Rennes University Hospital, Rennes, France
| | - Nastassia Navasiolava
- PXE Reference Center, University Hospital of Angers, Angers, France.,MitoVasc Institute, UMR CNRS 6015-UMR INSERM 1083, Angers University, Angers, France
| | | | - Juan Luis Carrillo Linares
- Internal Medicine Unit, Hospital Virgen de la Victoria and Instituto de Investigación Biomédica (IBIMA), Malaga, Spain
| | - Pedro Valdivielso
- Internal Medicine Unit, Hospital Virgen de la Victoria and Instituto de Investigación Biomédica (IBIMA), Malaga, Spain
| | | | - Guillaume Mahé
- Vascular Medicine Department, INSERM CIC1414, Rennes, France
| | - Ludovic Martin
- PXE Reference Center, University Hospital of Angers, Angers, France.,MitoVasc Institute, UMR CNRS 6015-UMR INSERM 1083, Angers University, Angers, France
| | - Georges Lefthériotis
- PXE Reference Center, University Hospital of Angers, Angers, France.,Department of Physiology and Vascular Investigations, University Hospital, Nice, France
| |
Collapse
|
15
|
Santoro C, Palladino F, Bernardo P, Cinalli G, Mirone G, Giugliano T, Piluso G, Perrotta S. Report on a child with neurofibromatosis type 2 and unilateral moyamoya: further evidence of cerebral vasculopathy in NF2. Neurol Sci 2019; 40:1475-1476. [DOI: 10.1007/s10072-019-3728-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/14/2019] [Indexed: 11/28/2022]
|
16
|
Guan Y, Gong Z, Xiao T, Li Z. Knockdown of miR-572 suppresses cell proliferation and promotes apoptosis in renal cell carcinoma cells by targeting the NF2/Hippo signaling pathway. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2018; 11:5705-5714. [PMID: 31949656 PMCID: PMC6963082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/31/2018] [Indexed: 06/10/2023]
Abstract
Background: Renal cell carcinoma (RCC) is one of the most common types of cancer. miR-572 has been proposed to be implicated in a number of human cancers, including RCC. Nevertheless, the detailed functions and molecular mechanisms of miR-572 in RCC have not been well illustrated. Methods: qRT-PCR assay was used to assess the expression of miR-572 in RCC specimens and cell lines. Loss-of-function experiments were carried out to explore the effect of miR-572 on proliferation and apoptosis in 786-O cells. Predicted by TargetScan, the interaction between miR-572 and neurofibromin 2 (NF2) was explored by dual-luciferase reporter assay and western blot analysis. To investigate whether the regulatory effect of miR-572 was mediated by NF2, 786-O cells were transfected with anti-miR-572 alone, or together with si-NF2. After that, western blot assay was used to validate whethermiR-572 regulated proliferation and apoptosis of the RCC cell line through NF2/Hippo signaling. Results: miR-572 expression was upregulated in RCC specimens and cell lines, and miR-572 knockdown suppressed proliferation and enhanced apoptosis in 786-O cells. miR-572 repressed NF2 expression by binding to NF2 mRNA 3'-UTR. Moreover, the anti-miR-572-mediated regulatory effect on proliferation and apoptosis was abated by the restoration of NF2 expression in RCC cells. Furthermore, miR-572 knockdown activated NF2/Hippo signaling pathway in RCC cells. Conclusions: The regulatory effect of miR-572 on proliferation and apoptosis is mediated through modulating NF2/Hippo signaling in RCC cell lines, providing a novel potential strategy for RCC.
Collapse
Affiliation(s)
- Yongjun Guan
- Department of Urology Surgery, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science441021, China
| | - Zhimin Gong
- Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science441021, China
| | - Tianlin Xiao
- Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science441021, China
| | - Zhaoyuan Li
- Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science441021, China
| |
Collapse
|
17
|
Lascelles K, Afridi S, Siddiqui A, Hemingway C, Ferner R, Ganesan V. Cerebral vasculopathy in childhood neurofibromatosis type 2: cause for concern? Dev Med Child Neurol 2018; 60:1285-1288. [PMID: 29781505 DOI: 10.1111/dmcn.13920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/06/2018] [Indexed: 11/28/2022]
Abstract
Unlike adult neurofibromatosis type 2 (NF2), which presents with symptoms related to bilateral vestibular schwannomas, children with NF2 most frequently present with ocular, dermatological, and neurological symptoms. Arteriopathy, a well-established feature in neurofibromatosis type 1, is not a widely recognized feature of NF2. Here we report three children with NF2 with cerebral arteriopathy and/or arterial ischaemic stroke. Bevacizumab, a vascular endothethial growth factor inhibitor, is an established treatment for rapidly growing vestibular schwannomas; however, it carries a risk of both ischaemic and haemorrhagic stroke. Thus, the role of screening and risk to benefit ratio of bevacizumab in NF2 merit further consideration. WHAT THIS PAPER ADDS: Children with neurofibromatosis type 2 (NF2) may be at increased risk of cerebral vasculopathy and arterial ischaemic stroke. Targeted magnetic resonance angiography should be performed in children with NF2 who are being considered for bevacizumab therapy.
Collapse
Affiliation(s)
- Karine Lascelles
- Children's Neuroscience Centre, Evelina London Children's Hospital, London, UK.,Department of Neurology, National Neurofibromatosis Service, Guys and St Thomas, NHS Foundation Trust, London, UK
| | - Shazia Afridi
- Department of Neurology, National Neurofibromatosis Service, Guys and St Thomas, NHS Foundation Trust, London, UK
| | - Ata Siddiqui
- Children's Neuroscience Centre, Evelina London Children's Hospital, London, UK
| | - Cheryl Hemingway
- Department of Neurology, Great Ormond Street Children's Hospital, London, UK
| | - Rosalie Ferner
- Department of Neurology, National Neurofibromatosis Service, Guys and St Thomas, NHS Foundation Trust, London, UK
| | - Vijeya Ganesan
- Department of Neurology, Great Ormond Street Children's Hospital, London, UK.,UCL Great Ormond Street Institute of Child Health, London, UK
| |
Collapse
|
18
|
CDK8 regulates the angiogenesis of pancreatic cancer cells in part via the CDK8-β-catenin-KLF2 signal axis. Exp Cell Res 2018; 369:304-315. [PMID: 29856990 DOI: 10.1016/j.yexcr.2018.05.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/18/2018] [Accepted: 05/28/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND CDK8 is associated with the transcriptional Mediator complex and has been shown to regulate several transcription factors implicated in cancer. As a pancreatic cancer oncogene, the role of CDK8 in cancer angiogenesis remains unclear. Here, we investigated the contribution of CDK8 in pancreatic cancer angiogenesis and examined the underlying molecular mechanisms. METHODS CDK8 expression was evaluated via immunohistochemistry, western blotting, and qRT-PCR in relation to the clinicopathological characteristics of pancreatic cancer patients. The effects of silencing or overexpressing CDK8 on cancer angiogenesis were assessed in vitro by western blotting assays in pancreatic cancer cell lines and in vivo with nude mice xenograft models. RESULTS Compared with adjacent normal tissues, pancreatic cancer tissues showed upregulation of CDK8 expression, which was inversely correlated with T grade, liver metastasis, size, lymph node metastasis and poor survival. CDK8 overexpression promoted angiogenesis in pancreatic cancer via activation of the CDK8-β-catenin-KLF2 signaling axis, as demonstrated by the upregulation and downregulation of signals representing the rate-limiting steps in angiogenesis. Silencing CDK8 inhibited angiogenesis in pancreatic cancer in vitro. Additionally, these results were confirmed in nude mice xenograft models in vivo. CONCLUSIONS CDK8 promotes angiogenesis in pancreatic cancer via activation of the CDK8-β-catenin-KLF2 signaling axis, thus providing valid targets for the treatment of pancreatic cancer.
Collapse
|
19
|
Wang Y, Wang B, Li P, Zhang Q, Liu P. Reduced RAC1 activity inhibits cell proliferation and induces apoptosis in neurofibromatosis type 2(NF2)-associated schwannoma. Neurol Res 2017; 39:1086-1093. [PMID: 28934903 DOI: 10.1080/01616412.2017.1376494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Objective To study the function and potential mechanism of RAC1 inhibitors in NF2-associated schwannoma. Methods In this study, we the downregulation of RAC1 activity and tumor cell phenotypes by RAC1 inhibitor NSC23766 in vitro. And we further validated the anti-proliferation effect by this RAC1 inhibitor in subcutaneous xenograft tumor model and sciatic nerve model. Results Pharmacological inhibition of RAC1 could significantly inhibit the proliferation of both RT4 cells and human NF2-associated primary schwannoma cells by inducing apoptosis. Pharmacological inhibition of RAC1 effectively reduced Rac1 activity and down-regulated the pathway downstream of Rac. Moreover, pharmacological inhibition of RAC1 showed a potential antitumor effect, with low toxicity in vivo. Conclusion RAC1 inhibitors may play a therapeutic role in patients with schwannoma.
Collapse
Affiliation(s)
- Ying Wang
- a Beijing Neurosurgical Institute, Capital Medical University , Beijing , China
| | - Bo Wang
- b Department of Neurosurgery , Beijing Tiantan Hospital, Capital Medical University , Beijing , China
| | - Peng Li
- b Department of Neurosurgery , Beijing Tiantan Hospital, Capital Medical University , Beijing , China
| | - Qi Zhang
- a Beijing Neurosurgical Institute, Capital Medical University , Beijing , China
| | - Pinan Liu
- a Beijing Neurosurgical Institute, Capital Medical University , Beijing , China.,b Department of Neurosurgery , Beijing Tiantan Hospital, Capital Medical University , Beijing , China
| |
Collapse
|
20
|
The efficacy of lapatinib and nilotinib in combination with radiation therapy in a model of NF2 associated peripheral schwannoma. J Neurooncol 2017; 135:47-56. [PMID: 28735458 DOI: 10.1007/s11060-017-2567-9] [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] [Received: 02/15/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
Abstract
Neurofibromatosis type 2 (NF2), a neurogenetic condition manifest by peripheral nerve sheath tumors (PNST) throughout the neuroaxis for which there are no approved therapies. In vitro and in vivo studies presented here examine agents targeting signaling pathways, angiogenesis, and DNA repair mechanisms. In vitro dose response assays demonstrated potent activity of lapatinib and nilotinib against the mouse schwannoma SC4 (Nf2 -/-) cell line. We then examined the efficacy of everolimus, nilotinib, lapatinib, bevacizumab and radiation (RT) as mono- and combination therapies in flank and sciatic nerve in vivo NF2-PNST models. Data were analyzed using generalized linear models, two sample T-tests and paired T-tests, and linear regression models. SC4(Nf2 -/-) cells implanted in the flank or sciatic nerve showed similar rates of growth (p = 0.9748). Lapatinib, nilotinib and RT significantly reduced tumor growth rate versus controls in the in vivo flank model (p = 0.0025, 0.0062, and 0.009, respectively) whereas bevacizumab and everolimus did not. The best performers were tested in the in vivo sciatic nerve model of NF2 associated PNST, where chemoradiation outperformed nilotinib or lapatinib as single agents (nilotinib vs. nilotinib + RT, p = 0.0001; lapatinib versus lapatinib + RT, p < 0.0001) with no observed toxicity. There was no re-growth of tumors even 14 days after treatment was stopped. The combination of either lapatinib or nilotinib with RT resulted in greater delays in tumor growth rate than any modality alone. This data suggest that concurrent low dose RT and targeted therapy may have a role in addressing progressive PNST in patients with NF2.
Collapse
|
21
|
Afridi SK, Thomson S, Connor SEJ, Walsh DC, Ferner RE. Aneurysms in neurofibromatosis type 2: Evidence for vasculopathy? Am J Med Genet A 2017; 173:1562-1565. [DOI: 10.1002/ajmg.a.38221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 02/16/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Shazia K. Afridi
- Department of Neurology; Guy's and St. Thomas’ NHS Trust; London UK
| | - Suki Thomson
- Department of Radiology; King's College and Neurofibromatosis Unit; London UK
| | - Steve E. J. Connor
- Department of Radiology; King's College and Neurofibromatosis Unit; London UK
| | | | | |
Collapse
|
22
|
Seo HH, Lee SY, Lee CY, Kim R, Kim P, Oh S, Lee H, Lee MY, Kim J, Kim LK, Hwang KC, Chang W. Exogenous miRNA-146a Enhances the Therapeutic Efficacy of Human Mesenchymal Stem Cells by Increasing Vascular Endothelial Growth Factor Secretion in the Ischemia/Reperfusion-Injured Heart. J Vasc Res 2017; 54:100-108. [DOI: 10.1159/000461596] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 02/08/2017] [Indexed: 11/19/2022] Open
|
23
|
Neufeld G, Mumblat Y, Smolkin T, Toledano S, Nir-Zvi I, Ziv K, Kessler O. The role of the semaphorins in cancer. Cell Adh Migr 2016; 10:652-674. [PMID: 27533782 PMCID: PMC5160032 DOI: 10.1080/19336918.2016.1197478] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 05/19/2016] [Accepted: 05/30/2016] [Indexed: 12/16/2022] Open
Abstract
The semaphorins were initially characterized as axon guidance factors, but have subsequently been implicated also in the regulation of immune responses, angiogenesis, organ formation, and a variety of additional physiological and developmental functions. The semaphorin family contains more then 20 genes divided into 7 subfamilies, all of which contain the signature sema domain. The semaphorins transduce signals by binding to receptors belonging to the neuropilin or plexin families. Additional receptors which form complexes with these primary semaphorin receptors are also frequently involved in semaphorin signaling. Recent evidence suggests that semaphorins also fulfill important roles in the etiology of multiple forms of cancer. Some semaphorins have been found to function as bona-fide tumor suppressors and to inhibit tumor progression by various mechanisms while other semaphorins function as inducers and promoters of tumor progression.
Collapse
Affiliation(s)
- Gera Neufeld
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Yelena Mumblat
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Tatyana Smolkin
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Shira Toledano
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Inbal Nir-Zvi
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Keren Ziv
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Ofra Kessler
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| |
Collapse
|
24
|
Abstract
Secreted class 3 semaphorins (Sema3), which signal through plexin receptors and mostly use neuropilins (Nrps) as co-receptors, were initially identified for their ability to steer navigating axons in the developing embryo. They were later found to control angiogenesis in physiological and pathological settings as well (Serini et al, 2013). Indeed, the development of a novel and aberrant vasculature is central to the pathogenesis of several human diseases, including cancer and vascular retinopathies (Goel et al, 2011). A large body of evidence demonstrates that in cancer, a massive regression of angiogenesis may trigger hypoxia-driven genetic programs, which in turn can overcome drug inhibitory mechanisms and ultimately favour cancer cell invasion and dissemination. Thus, an emerging concept in molecular medicine is to devise therapeutic strategies that, rather than simply inhibiting angiogenesis, can foster the re-establishment of a structural and functional normal network, a phenomenon often referred to as “vessel normalization” (Goel et al, 2011) (Fig 1). Of note, and in this context, Sema3A (Maione et al, 2009) and Sema3F (Wong et al, 2012) have been reported to favour the normalization of cancer vasculature and impair metastatic dissemination.
Collapse
Affiliation(s)
- Guido Serini
- Department of Oncology, University of Torino and Candiolo Cancer Institute, FPO - IRCCS, Candiolo, Italy
| | - Luca Tamagnone
- Department of Oncology, University of Torino and Candiolo Cancer Institute, FPO - IRCCS, Candiolo, Italy
| |
Collapse
|
25
|
Tumor Biology of Vestibular Schwannoma: A Review of Experimental Data on the Determinants of Tumor Genesis and Growth Characteristics. Otol Neurotol 2016; 36:1128-36. [PMID: 26049313 DOI: 10.1097/mao.0000000000000788] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Provide an overview of the literature on vestibular schwannoma biology with special attention to tumor behavior and targeted therapy. BACKGROUND Vestibular schwannomas are benign tumors originating from the eighth cranial nerve and arise due to inactivation of the NF2 gene and its product merlin. Unraveling the biology of these tumors helps to clarify their growth pattern and is essential in identifying therapeutic targets. METHODS PubMed search for English-language articles on vestibular schwannoma biology from 1994 to 2014. RESULTS Activation of merlin and its role in cell signaling seem as key aspects of vestibular schwannoma biology. Merlin is regulated by proteins such as CD44, Rac, and myosin phosphatase-targeting subunit 1. The tumor-suppressive functions of merlin are related to receptor tyrosine kinases, such as the platelet-derived growth factor receptor and vascular endothelial growth factor receptor. Merlin mediates the Hippo pathway and acts within the nucleus by binding E3 ubiquiting ligase CRL4. Angiogenesis is an important mechanism responsible for the progression of these tumors and is affected by processes such as hypoxia and inflammation. Inhibiting angiogenesis by targeting vascular endothelial growth factor receptor seems to be the most successful pharmacologic strategy, but additional therapeutic options are emerging. CONCLUSION Over the years, the knowledge on vestibular schwannoma biology has significantly increased. Future research should focus on identifying new therapeutic targets by investigating vestibular schwannoma (epi)genetics, merlin function, and tumor behavior. Besides identifying novel targets, testing new combinations of existing treatment strategies can further improve vestibular schwannoma therapy.
Collapse
|
26
|
Abstract
The vascular and the nervous system are responsible for oxygen, nutrient, and information transfer and thereby constitute highly important communication systems in higher organisms. These functional similarities are reflected at the anatomical, cellular, and molecular levels, where common developmental principles and mutual crosstalks have evolved to coordinate their action. This resemblance of the two systems at different levels of complexity has been termed the "neurovascular link." Most of the evidence demonstrating neurovascular interactions derives from studies outside the CNS and from the CNS tissue of the retina. However, little is known about the specific properties of the neurovascular link in the brain. Here, we focus on regulatory effects of molecules involved in the neurovascular link on angiogenesis in the periphery and in the brain and distinguish between general and CNS-specific cues for angiogenesis. Moreover, we discuss the emerging molecular interactions of these angiogenic cues with the VEGF-VEGFR-Delta-like ligand 4 (Dll4)-Jagged-Notch pathway.
Collapse
|
27
|
Mishra R, Kumar D, Tomar D, Chakraborty G, Kumar S, Kundu GC. The potential of class 3 semaphorins as both targets and therapeutics in cancer. Expert Opin Ther Targets 2014; 19:427-42. [PMID: 25434284 DOI: 10.1517/14728222.2014.986095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
INTRODUCTION Semaphorins have been originally identified as a family of evolutionary conserved soluble or membrane-associated proteins involved in diverse developmental phenomena. This family of proteins profoundly influences numerous pathophysiological processes, including organogenesis, cardiovascular development and immune response. Apart from steering the neural networking process, these are implicated in a broad range of biological operations including regulation of tumor progression and angiogenesis. AREAS COVERED Members of class 3 semaphorin family are known to modulate various cellular processes involved in malignant transformation. Some of the family members trigger diverse signaling processes involved in tumor progression and angiogenesis by binding with plexin and neuropilin. A better understanding of the various signaling mechanisms by which semaphorins modulate tumor progression and angiogenesis may serve as crucial tool in crafting new semaphorin-based anticancer therapy. These include treatment with recombinant tumor suppressive semaphorins or inhibition of tumor-promoting semaphorins by their specific siRNAs, small-molecule inhibitors or specific receptors using neutralizing antibodies or blocking peptides that might serve as novel strategies for effective management of cancers. EXPERT OPINION This review focuses on all the possible avenues to explore various members of class 3 semaphorin family to serve as therapeutics for combating cancer.
Collapse
Affiliation(s)
- Rosalin Mishra
- Loboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science (NCCS) , Pune 411007 , India
| | | | | | | | | | | |
Collapse
|
28
|
Nasarre P, Gemmill RM, Drabkin HA. The emerging role of class-3 semaphorins and their neuropilin receptors in oncology. Onco Targets Ther 2014; 7:1663-87. [PMID: 25285016 PMCID: PMC4181631 DOI: 10.2147/ott.s37744] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The semaphorins, discovered over 20 years ago, are a large family of secreted or transmembrane and glycophosphatidylinositol -anchored proteins initially identified as axon guidance molecules crucial for the development of the nervous system. It has now been established that they also play important roles in organ development and function, especially involving the immune, respiratory, and cardiovascular systems, and in pathological disorders, including cancer. During tumor progression, semaphorins can have both pro- and anti-tumor functions, and this has created complexities in our understanding of these systems. Semaphorins may affect tumor growth and metastases by directly targeting tumor cells, as well as indirectly by interacting with and influencing cells from the micro-environment and vasculature. Mechanistically, semaphorins, through binding to their receptors, neuropilins and plexins, affect pathways involved in cell adhesion, migration, invasion, proliferation, and survival. Importantly, neuropilins also act as co-receptors for several growth factors and enhance their signaling activities, while class 3 semaphorins may interfere with this. In this review, we focus on the secreted class 3 semaphorins and their neuropilin co-receptors in cancer, including aspects of their signaling that may be clinically relevant.
Collapse
Affiliation(s)
- Patrick Nasarre
- Division of Hematology-Oncology, The Hollings Cancer Center and Medical University of South Carolina, Charleston, SC, USA
| | - Robert M Gemmill
- Division of Hematology-Oncology, The Hollings Cancer Center and Medical University of South Carolina, Charleston, SC, USA
| | - Harry A Drabkin
- Division of Hematology-Oncology, The Hollings Cancer Center and Medical University of South Carolina, Charleston, SC, USA
| |
Collapse
|
29
|
Cancer subclonal genetic architecture as a key to personalized medicine. Neoplasia 2014; 15:1410-20. [PMID: 24403863 DOI: 10.1593/neo.131972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 02/08/2023] Open
Abstract
The future of personalized oncological therapy will likely rely on evidence-based medicine to integrate all of the available evidence to delineate the most efficacious treatment option for the patient. To undertake evidence-based medicine through use of targeted therapy regimens, identification of the specific underlying causative mutation(s) driving growth and progression of a patient's tumor is imperative. Although molecular subtyping is important for planning and treatment, intraclonal genetic diversity has been recently highlighted as having significant implications for biopsy-based prognosis. Overall, delineation of the clonal architecture of a patient's cancer and how this will impact on the selection of the most efficacious therapy remain a topic of intense interest.
Collapse
|
30
|
Corà D, Astanina E, Giraudo E, Bussolino F. Semaphorins in cardiovascular medicine. Trends Mol Med 2014; 20:589-98. [PMID: 25154329 DOI: 10.1016/j.molmed.2014.07.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/12/2014] [Accepted: 07/23/2014] [Indexed: 01/08/2023]
Abstract
During organogenesis, patterning is primarily achieved by the combined actions of morphogens. Among these, semaphorins represent a general system for establishing the appropriate wiring architecture of biological nets. Originally discovered as evolutionarily conserved steering molecules for developing axons, subsequent studies on semaphorins expanded their functions to the cardiovascular and immune systems. Semaphorins participate in cardiac organogenesis and control physiological vasculogenesis and angiogenesis, which result from a balance between pro- and anti-angiogenic signals. These signals are altered in several diseases. In this review, we discuss the role of semaphorins in vascular biology, emphasizing the mechanisms by which these molecules control vascular patterning and lymphangiogenesis, as well as in genetically inherited and degenerative vascular diseases.
Collapse
Affiliation(s)
- Davide Corà
- Department of Oncology, University of Torino, Torino, Italy; Candiolo Cancer Institute, Torino, Candiolo, Italy
| | - Elena Astanina
- Department of Oncology, University of Torino, Torino, Italy; Candiolo Cancer Institute, Torino, Candiolo, Italy
| | - Enrico Giraudo
- Candiolo Cancer Institute-FPO, IRCCS, Torino, Candiolo, Italy; Department of Science and Drug Technology, University of Torino, Torino, Italy
| | - Federico Bussolino
- Department of Oncology, University of Torino, Torino, Italy; Candiolo Cancer Institute, Torino, Candiolo, Italy.
| |
Collapse
|
31
|
|
32
|
Gastrinoma and neurofibromatosis type 2: the first case report and review of the literature. BMC Gastroenterol 2014; 14:110. [PMID: 24961548 PMCID: PMC4082280 DOI: 10.1186/1471-230x-14-110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 06/13/2014] [Indexed: 02/08/2023] Open
Abstract
Background Gastroenteropancreatic neuroendocrine tumors have occasionally been described in association with neurofibromatosis type 1, whereas an association with neurofibromatosis type 2 has never been reported. Case presentation This report refers to an Italian 69 year old woman with neurofibromatosis type 2 and a pancreatic gastrinoma. In the past she had encephalic meningiomas, a tongue schwannoma and bilateral acoustic neurinomas. She presented with weight loss and a long-term history of diarrhea, responsive to proton pump inhibitors. Upper gastrointestinal endoscopy revealed peptic ulcer of the duodenal bulb. Blood tests were normal, except for the elevation of plasma gastrin (1031 pg/ml; reference value <108) and chromogranin A (337 U/L; reference value <36). After secretin stimulation testing, the plasma gastrin level rose to 3789 pg/ml. The abdomen magnetic resonance imaging and gallium68-DOTATOC positron emission tomography scan demonstrated the presence of a 1.2 x 2 cm lesion in the pancreatic head and a liver metastatis. Pancreatic endoscopic ultrasound with fine needle aspiration revealed cytomorphologic features suggestive of pancreatic gastrinoma. Brain magnetic resonance showed a pituitary microadenoma. There was no evidence of hyperparathyroidism. The genetic test for multiple endocrine neoplasia type 1 syndrome mutation was negative. Conclusion This report focuses on the first case of coexistence of gastrinoma with neurofibromatosis type 2. Although the clinical relevance of this association remains to be determined, our case report will surely give cause for due consideration.
Collapse
|
33
|
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.
Collapse
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
| |
Collapse
|
34
|
Garcia C, Gutmann DH. Nf2/Merlin controls spinal cord neural progenitor function in a Rac1/ErbB2-dependent manner. PLoS One 2014; 9:e97320. [PMID: 24817309 PMCID: PMC4016309 DOI: 10.1371/journal.pone.0097320] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 04/17/2014] [Indexed: 12/02/2022] Open
Abstract
Objective Individuals with the neurofibromatosis type 2 (NF2) cancer predisposition syndrome develop spinal cord glial tumors (ependymomas) that likely originate from neural progenitor cells. Whereas many spinal ependymomas exhibit indolent behavior, the only treatment option for clinically symptomatic tumors is surgery. In this regard, medical therapies are unfortunately lacking due to an incomplete understanding of the critical growth control pathways that govern the function of spinal cord (SC) neural progenitor cells (NPCs). Methods To identify potential therapeutic targets for these tumors, we leveraged primary mouse Nf2-deficient spinal cord neural progenitor cells. Results We demonstrate that the Nf2 protein, merlin, negatively regulates spinal neural progenitor cell survival and glial differentiation in an ErbB2-dependent manner, and that NF2-associated spinal ependymomas exhibit increased ErbB2 activation. Moreover, we show that Nf2-deficient SC NPC ErbB2 activation results from Rac1-mediated ErbB2 retention at the plasma membrane. Significance Collectively, these findings establish ErbB2 as a potential rational therapeutic target for NF2-associated spinal ependymoma.
Collapse
Affiliation(s)
- Cynthia Garcia
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - David H. Gutmann
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
| |
Collapse
|
35
|
A hypothesis about the potential role of statin administration as adjuvant treatment in the management of Merlin-deficient tumors. INTERDISCIPLINARY NEUROSURGERY-ADVANCED TECHNIQUES AND CASE MANAGEMENT 2014. [DOI: 10.1016/j.inat.2014.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
36
|
London NR, Gurgel RK. The role of vascular endothelial growth factor and vascular stability in diseases of the ear. Laryngoscope 2014; 124:E340-6. [PMID: 24347479 DOI: 10.1002/lary.24564] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 11/14/2013] [Accepted: 12/09/2013] [Indexed: 02/04/2023]
Abstract
OBJECTIVES/HYPOTHESIS Vascular endothelial growth factor (VEGF) is a critical mediator of vascular permeability and angiogenesis and likely plays an important role in cochlear function and hearing. This review highlights the role of VEGF in hearing loss associated with vestibular schwannomas, otitis media with effusion, and sensorineural hearing loss. STUDY DESIGN PubMed literature review. METHODS A review of the literature was conducted to determine the role of VEGF in diseases affecting hearing. RESULTS Therapeutic efficacy has been demonstrated for the anti-VEGF agent bevacizumab in vestibular schwannomas, with tumor size reduction and hearing improvement in patients with neurofibromatosis type 2. The loss of functional Merlin, the protein product of the nf2 gene, results in a decrease in expression of the anti-angiogenic protein SEMA3F through a Rac-1-dependent mechanism, allowing VEGF to promote angiogenesis. Bevacizumab may therefore restore the angiogenic balance through inhibiting the relative increase in VEGF. Many of the clinical findings of otitis media with effusion can be reproduced by delivery of recombinant VEGF through transtympanic injection or submucosal osmotic pump. VEGF receptor inhibitors have been demonstrated to improve hearing in an animal model of otitis media with effusion. VEGF affects both the inner ear damage and repair processes in sensorineural hearing loss. CONCLUSIONS VEGF has an important role in vestibular schwannomas, otitis media with effusion, and sensorineural hearing loss.
Collapse
Affiliation(s)
- Nyall R London
- Department of Internal Medicine, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah; Department of Oncological Sciences, University of Utah, Salt Lake City, Utah
| | | |
Collapse
|
37
|
Overcoming intratumor heterogeneity of polygenic cancer drug resistance with improved biomarker integration. Neoplasia 2013; 14:1278-89. [PMID: 23308059 DOI: 10.1593/neo.122096] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 12/11/2012] [Accepted: 12/11/2012] [Indexed: 12/14/2022] Open
Abstract
Improvements in technology and resources are helping to advance our understanding of cancer-initiating events as well as factors involved with tumor progression, adaptation, and evasion of therapy. Tumors are well known to contain diverse cell populations and intratumor heterogeneity affords neoplasms with a diverse set of biologic characteristics that can be used to evolve and adapt. Intratumor heterogeneity has emerged as a major hindrance to improving cancer patient care. Polygenic cancer drug resistance necessitates reconsidering drug designs to include polypharmacology in pursuit of novel combinatorial agents having multitarget activity to overcome the diverse and compensatory signaling pathways in which cancer cells use to survive and evade therapy. Advances will require integration of different biomarkers such as genomics and imaging to provide for more adequate elucidation of the spatially varying location, type, and extent of diverse intratumor signaling molecules to provide for a rationale-based personalized cancer medicine strategy.
Collapse
|
38
|
Tanaka K, Eskin A, Chareyre F, Jessen WJ, Manent J, Niwa-Kawakita M, Chen R, White CH, Vitte J, Jaffer ZM, Nelson SF, Rubenstein AE, Giovannini M. Therapeutic potential of HSP90 inhibition for neurofibromatosis type 2. Clin Cancer Res 2013; 19:3856-70. [PMID: 23714726 DOI: 10.1158/1078-0432.ccr-12-3167] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The growth and survival of neurofibromatosis type 2 (NF2)-deficient cells are enhanced by the activation of multiple signaling pathways including ErbBs/IGF-1R/Met, PI3K/Akt, and Ras/Raf/Mek/Erk1/2. The chaperone protein HSP90 is essential for the stabilization of these signaling molecules. The aim of the study was to characterize the effect of HSP90 inhibition in various NF2-deficient models. EXPERIMENTAL DESIGN We tested efficacy of the small-molecule NXD30001, which has been shown to be a potent HSP90 inhibitor. The antiproliferative activity of NXD30001 was tested in NF2-deficient cell lines and in human primary schwannoma and meningioma cultures in vitro. The antitumor efficacy of HSP90 inhibition in vivo was verified in two allograft models and in one NF2 transgenic model. The underlying molecular alteration was further characterized by a global transcriptome approach. RESULTS NXD30001 induced degradation of client proteins in and suppressed proliferation of NF2-deficient cells. Differential expression analysis identified subsets of genes implicated in cell proliferation, cell survival, vascularization, and Schwann cell differentiation whose expression was altered by NXD30001 treatment. The results showed that NXD30001 in NF2-deficient schwannoma suppressed multiple pathways necessary for tumorigenesis. CONCLUSIONS HSP90 inhibition showing significant antitumor activity against NF2-related tumor cells in vitro and in vivo represents a promising option for novel NF2 therapies.
Collapse
Affiliation(s)
- Karo Tanaka
- Center for Neural Tumor Research and Section on Genetics of Hereditary Ear Disorders, House Research Institute, University of California, Los Angeles, CA 90057, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
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.
Collapse
Affiliation(s)
- Chenghua Gu
- Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115, USA.
| | | |
Collapse
|
40
|
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.
Collapse
Affiliation(s)
- G Serini
- Institute for Cancer Research at Candiolo (IRCC), University of Torino, Turin, Italy
| | | | | | | |
Collapse
|
41
|
Development of drug treatments for neurofibromatosis type 2-associated vestibular schwannoma. Curr Opin Otolaryngol Head Neck Surg 2013; 20:372-9. [PMID: 22931905 DOI: 10.1097/moo.0b013e328357d2ee] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To review the discoveries in molecular pathophysiology contributing to the development of neurofibromatosis type 2 (NF2)-associated vestibular schwannomas and the recent experiences with drug therapies for these tumors. The review includes discussion of diagnostic criteria for NF2, populations to clinically consider for drug therapy and drug targets currently under consideration for NF2. RECENT FINDINGS Increased insight into the complex pathways that underlie both the genetic syndrome of NF2 and the specific pathogenesis of vestibular schwannomas has highlighted multiple potential therapeutic targets. These discoveries have been translated into clinical trials with some early promising results. Inhibition of angiogenesis as well as regulation of mammalian target of rapamycin and the epidermal growth factor receptor family of receptors are the focus of current clinical investigations. SUMMARY Although a great deal of work is ongoing to understand the multiple effects of the lack of the regulating protein Merlin on tumorgenesis in patients with NF2, advances are ongoing with clinical therapeutics. There is cause for enthusiasm based on recent results with antiangiogenesis therapy in select patients with NF2 and progressive vestibular schwannomas; however, awareness of the notable risks and limitations of therapies currently in development is required.
Collapse
|
42
|
Virtej A, Løes SS, Berggreen E, Bletsa A. Localization and signaling patterns of vascular endothelial growth factors and receptors in human periapical lesions. J Endod 2013; 39:605-11. [PMID: 23611377 DOI: 10.1016/j.joen.2012.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 11/28/2012] [Accepted: 12/10/2012] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Vascular endothelial growth factors (VEGFs) and their receptors (VEGFRs) are key players in vasculogenesis and are also involved in pathologic conditions with bone destruction. Vasculogenesis is critical for disease progression, and bone resorption is a hallmark of apical periodontitis. However, the localization of VEGFs and VEGFRs and their gene signaling pathways in human apical periodontitis have not been thoroughly investigated. The aim of this study was to localize VEGFs and VEGFRs and analyze their gene expression as well as signaling pathways in human periapical lesions. METHODS Tissue was collected after endodontic surgery from patients diagnosed with chronic apical periodontitis. Periodontal ligament samples from extracted healthy wisdom teeth was also collected and used as control tissue. In lesion cryosections, VEGFs/VEGFRs were identified by immunohistochemistry/double immunofluorescence by using specific antibodies. A human VEGF signaling polymerase chain reaction array system was used for gene expression analysis comparing lesions with periodontal ligament samples. RESULTS The histologic evaluation revealed heterogeneous morphology of the periapical lesions with various degrees of inflammatory infiltrates. In the lesions, all investigated factors and receptors were identified in blood vessels and various immune cells. No lymphatic vessels were detected. Gene expression analysis revealed up-regulation of VEGF-A and VEGFR-3, although not significant. Phosphatidylinositol-3-kinases, protein kinase C, mitogen-activated protein kinases, and phospholipases, all known to be involved in VEGF-mediated angiogenic activity, were significantly up-regulated. CONCLUSIONS The cellular and vascular expressions of VEGFs and VEGFRs in chronic apical periodontitis, along with significant alterations of genes mediating VEGF-induced angiogenic responses, suggest ongoing vascular remodeling in established chronic periapical lesions.
Collapse
Affiliation(s)
- Anca Virtej
- Institute of Biomedicine, Faculty of Medicine-Dentistry, University of Bergen, Bergen, Norway
| | | | | | | |
Collapse
|