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Wittig F, Koch F, Pannenberg L, Bekeschus S, Ramer R, Hinz B. β-Caryophyllene Inhibits Endothelial Tube Formation by Modulating the Secretome of Hypoxic Lung Cancer Cells-Possible Role of VEGF Downregulation. Int J Mol Sci 2024; 25:810. [PMID: 38255884 PMCID: PMC10815222 DOI: 10.3390/ijms25020810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 01/24/2024] Open
Abstract
β-Caryophyllene (BCP), a bicyclic sesquiterpene that is a component of the essential oils of various spice and food plants, has been described as a selective CB2 cannabinoid receptor agonist. In the present study, the effect of BCP on angiogenesis was investigated. It was found that conditioned media (CM) from BCP-treated hypoxic A549 lung cancer cells exhibited a concentration-dependent inhibitory effect on human umbilical vein endothelial cell (HUVEC) tube formation induced by CM from vehicle-treated hypoxic A549 cells. There was an associated concentration-dependent decrease in the proangiogenic factor vascular endothelial growth factor (VEGF) in the CM, with both BCP inhibitory effects (tube formation, VEGF secretion) being CB2 receptor-dependent. A reduction of the transcription factor hypoxia-inducible factor 1α (HIF-1α) was furthermore detected. The antiangiogenic and VEGF-lowering properties of BCP were confirmed when CM from another lung cancer cell line, H358, were tested. When directly exposed to HUVECs, BCP showed no significant effect on tube formation, but at 10 µM, impaired VEGF receptor 2 (VEGFR2) phosphorylation triggered by recombinant VEGF in a CB2 receptor-independent manner. In summary, BCP has a dual antiangiogenic effect on HUVECs, manifested in the inhibition of tube formation through modulation of the tumor cell secretome and additionally in the inhibition of VEGF-induced VEGFR2 activation. Because the CB2 agonist has no psychoactive properties, BCP should continue to be evaluated preclinically for further antitumor effects.
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Affiliation(s)
- Felix Wittig
- Institute of Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany; (F.W.)
| | - Florian Koch
- Institute of Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany; (F.W.)
| | - Liza Pannenberg
- Institute of Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany; (F.W.)
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany
| | - Robert Ramer
- Institute of Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany; (F.W.)
| | - Burkhard Hinz
- Institute of Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany; (F.W.)
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2
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Yadav PS, Papaioannou G, Kobelski MM, Demay MB. Phosphate-induced activation of VEGFR2 leads to caspase-9-mediated apoptosis of hypertrophic chondrocytes. iScience 2023; 26:107548. [PMID: 37636062 PMCID: PMC10450517 DOI: 10.1016/j.isci.2023.107548] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/21/2023] [Accepted: 08/02/2023] [Indexed: 08/29/2023] Open
Abstract
Low circulating phosphate (Pi) leads to rickets, characterized by expansion of the hypertrophic chondrocytes (HCs) in the growth plate due to impaired HC apoptosis. Studies in HCs demonstrate that Pi activates the Raf/MEK/ERK1/2 and mitochondrial apoptotic pathways. To determine how Pi activates these pathways, a small-molecule screen was undertaken to identify inhibitors of Pi-induced ERK1/2 phosphorylation in HCs. Vascular endothelial growth factor receptor 2 (VEGFR2) was identified as a target. In vitro studies in HCs demonstrate that VEGFR2 inhibitors block Pi-induced pERK1/2 and caspase-9 cleavage. Like Pi, rhVEGF activates ERK1/2 and caspase-9 in HCs and induces phosphorylation of VEGFR2, confirming that Pi activates this signaling pathway in HCs. Chondrocyte-specific depletion of VEGFR2 leads to an increase in HCs, impaired vascular invasion, and a decrease in HC apoptosis. Thus, these studies define a role for VEGFR2 in transducing Pi signals and mediating its effects on growth plate maturation.
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Affiliation(s)
- Prem Swaroop Yadav
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Garyfallia Papaioannou
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | | | - Marie B. Demay
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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3
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Zhang Y, Neng L, Sharma K, Hou Z, Johnson A, Song J, Dabdoub A, Shi X. Pericytes control vascular stability and auditory spiral ganglion neuron survival. eLife 2023; 12:e83486. [PMID: 36719173 PMCID: PMC9940910 DOI: 10.7554/elife.83486] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/26/2023] [Indexed: 02/01/2023] Open
Abstract
The inner ear has a rich population of pericytes, a multi-functional mural cell essential for sensory hair cell heath and normal hearing. However, the mechanics of how pericytes contribute to the homeostasis of the auditory vascular-neuronal complex in the spiral ganglion are not yet known. In this study, using an inducible and conditional pericyte depletion mouse (PDGFRB-CreERT2; ROSA26iDTR) model, we demonstrate, for the first time, that pericyte depletion causes loss of vascular volume and spiral ganglion neurons (SGNs) and adversely affects hearing sensitivity. Using an in vitro trans-well co-culture system, we show pericytes markedly promote neurite and vascular branch growth in neonatal SGN explants and adult SGNs. The pericyte-controlled neural growth is strongly mediated by pericyte-released exosomes containing vascular endothelial growth factor-A (VEGF-A). Treatment of neonatal SGN explants or adult SGNs with pericyte-derived exosomes significantly enhances angiogenesis, SGN survival, and neurite growth, all of which were inhibited by a selective blocker of VEGF receptor 2 (Flk1). Our study demonstrates that pericytes in the adult ear are critical for vascular stability and SGN health. Cross-talk between pericytes and SGNs via exosomes is essential for neuronal and vascular health and normal hearing.
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Affiliation(s)
- Yunpei Zhang
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
| | - Lingling Neng
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
| | - Kushal Sharma
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
| | - Zhiqiang Hou
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
| | - Anatasiya Johnson
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
| | - Junha Song
- Life Sciences Division, Lawrence Berkeley National LaboratoryBerkeleyUnited States
| | - Alain Dabdoub
- Biological Sciences, Sunnybrook Research InstituteTorontoCanada
- Department of Otolaryngology-Head & Neck Surgery, University of TorontoTorontoCanada
- Department of Laboratory Medicine and Pathobiology, University of TorontoTorontoCanada
| | - Xiaorui Shi
- Oregon Hearing Research Center, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science UniversityPortlandUnited States
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4
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Tubular epithelial cells-derived small extracellular vesicle-VEGF-A promotes peritubular capillary repair in ischemic kidney injury. NPJ Regen Med 2022; 7:73. [PMID: 36528739 PMCID: PMC9759551 DOI: 10.1038/s41536-022-00268-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022] Open
Abstract
Peritubular capillaries (PTCs) are closely related to renal tubules in structure and function, and both are pivotal regulators in the development and progression of acute kidney injury (AKI). However, the mechanisms that underlie the interaction between PTCs and tubules during AKI remain unclear. Here we explored a new mode of tubulovascular crosstalk mediated by small extracellular vesicles (sEV) after AKI. In response to renal ischemia/reperfusion (I/R) injury, endothelial proliferation of PTCs and tubular expression of vascular endothelial growth factor-A (VEGF-A) were increased, accompanied by a remarkable redistribution of cytoplasmic VEGF-A to the basolateral side of tubular cells. Meanwhile, the secretion mode of VEGF-A was converted in the injured tubular cells, which showed a much greater tendency to secrete VEGF-A via sEV other than the free form. Interestingly, tubular cell-derived VEGF-A-enriched sEV (sEV-VEGF-A) turned out to promote endothelial proliferation which was regulated by VEGF receptors 1 and 2. Furthermore, inhibition of renal sEV secretion by Rab27a knockdown resulted in a significant decrease in the proliferation of peritubular endothelial cells in vivo. Importantly, taking advantage of the newly recognized endogenous repair response of PTCs, exogenous supplementation of VEGF-A + sEV efficiently recused PTC rarefaction, improved renal perfusion, and halted the AKI to CKD transition. Taken together, our study uncovered a novel intrinsic repair response after AKI through renal tubule-PTC crosstalk via sEV-VEGF-A, which could be exploited as a promising therapeutic angiogenesis strategy in diseases with ischemia.
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VEGF-A and FGF4 Engineered C2C12 Myoblasts and Angiogenesis in the Chick Chorioallantoic Membrane. Biomedicines 2022; 10:biomedicines10081781. [PMID: 35892681 PMCID: PMC9330725 DOI: 10.3390/biomedicines10081781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/06/2022] [Accepted: 07/21/2022] [Indexed: 01/04/2023] Open
Abstract
Angiogenesis is the formation of new blood vessels from pre-existing vessels. Adequate oxygen transport and waste removal are necessary for tissue homeostasis. Restrictions in blood supply can lead to ischaemia which can contribute to disease pathology. Vascular endothelial growth factor (VEGF) is essential in angiogenesis and myogenesis, making it an ideal candidate for angiogenic and myogenic stimulation in muscle. We established C2C12 mouse myoblast cell lines which stably express elevated levels of (i) human VEGF-A and (ii) dual human FGF4-VEGF-A. Both stably transfected cells secreted increased amounts of human VEGF-A compared to non-transfected cells, with the latter greater than the former. In vitro, conditioned media from engineered cells resulted in a significant increase in endothelial cell proliferation, migration, and tube formation. In vivo, this conditioned media produced a 1.5-fold increase in angiogenesis in the chick chorioallantoic membrane (CAM) assay. Delivery of the engineered myoblasts on Matrigel demonstrated continued biological activity by eliciting an almost 2-fold increase in angiogenic response when applied directly to the CAM assay. These studies qualify the use of genetically modified myoblasts in therapeutic angiogenesis for the treatment of muscle diseases associated with vascular defects.
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Chen HL, Su YC, Chen HC, Su JH, Wu CY, Wang SW, Lin IP, Chen CY, Lee CH. Heteronemin Suppresses Lymphangiogenesis through ARF-1 and MMP-9/VE-Cadherin/Vimentin. Biomedicines 2021; 9:biomedicines9091109. [PMID: 34572295 PMCID: PMC8471334 DOI: 10.3390/biomedicines9091109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/17/2021] [Accepted: 08/26/2021] [Indexed: 02/07/2023] Open
Abstract
Lymphatic metastasis is a biological procedure associated with the pathogenesis of several diseases, especially in tumor metastasis. Therefore, regulation of lymphangiogenesis has become a promising strategy for cancer therapy. In this study, we aimed to investigate the anti-lymphangiogenic effect of heteronemin (SP-1) isolated from the sponge Hyrtios sp. in vitro and in vivo. Human lymphatic endothelial cells (LECs) were utilized to evaluate the anti-lymphangiogenic effect of SP-1 in vitro. Molecular docking, western blotting, flow-cytometry, MTT and ELISA were performed to investigate the mechanism of action. For in vivo approaches, the transgenic (fli1:EGFP; gata1:DsRed) zebrafish and mouse ear sponges were used. Molecular docking studies showed that SP-1 is a potent vascular endothelial growth factor receptor 3 (VEGFR-3)-binding compound. Treatment of LEC with SP-1 reduced the phosphorylation of VEGFR-3. SP-1 suppressed the development of the thoracic duct in zebrafish and mouse lymphangiogenesis ear sponges in vivo. Mechanistically, SP-1 induced the cell cycle arrest of LECs in the G0/G1 phase and reduced the downstream of VEGFR-3, such as phosphorylated MEK/ERK and NF-κB. In addition, SP-1 inhibited LECs' tubulogenesis and migration through the ARF-1 and MMP-9/VE-cadherin/vimentin. Overall, anti-lymphangiogenic properties of SP-1 occur by downregulating the VEGFR-3 cascade, ARF-1 and MMP-9/VE-cadherin/vimentin. Collectively, these results proposed that SP-1 might be a potential candidate for the treatment of lymphangiogenesis-associated diseases.
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Affiliation(s)
- Hsien-Lin Chen
- Division of General Surgery, Department of Surgery, Liuying Chi-Mei Medical, Tainan 73657, Taiwan;
| | - Yu-Chieh Su
- Department of Medicine, School of Medicine, I-Shou University, Kaohsiung 840203, Taiwan;
- Division of Hematology-Oncology, Department of Internal Medicine, E-Da Hospital, Kaohsiung 824410, Taiwan
| | - Huang-Chi Chen
- Department of Internal Medicine, Kaohsiung Municipal Siaogang Hospital, Kaohsiung 81267, Taiwan;
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
| | - Jui-Hsin Su
- National Museum of Marine Biology & Aquarium, Institute of Marine Biotechnology, National Dong Hwa University, Pingtung 94401, Taiwan;
| | - Chang-Yi Wu
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 804201, Taiwan
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, New Taipei City 252005, Taiwan;
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - In-Pin Lin
- Department of Pharmacology, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Chung-Yi Chen
- Department of Nutrition and Health Science, School of Medical and Health Sciences, Fooyin University, Kaohsiung 83102, Taiwan;
| | - Chien-Hsing Lee
- Department of Pharmacology, School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Correspondence: ; Tel.: +886-7312-1101 (ext. 2139); Fax: +886-7323-4686
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7
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Zhang P, Lim SB, Jiang K, Chew TW, Low BC, Lim CT. Distinct mRNAs in Cancer Extracellular Vesicles Activate Angiogenesis and Alter Transcriptome of Vascular Endothelial Cells. Cancers (Basel) 2021; 13:cancers13092009. [PMID: 33921957 PMCID: PMC8122258 DOI: 10.3390/cancers13092009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/07/2021] [Accepted: 04/19/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary Cancer extracellular vesicles (EVs) are implicated in various processes of cancer development, with most of the EV-induced changes attributed to EV proteins and microRNAs. However, the knowledge about the cancer EV-mRNAs remains limited. Here, we have assessed the mRNAs of 61 diverse oncogenes and found half of them, including VEGFA and SNAIL1/2, are abundant in cancer EVs while absent in non-tumorigenic cell-derived EVs. Fluorescent trafficking shows the EV VEGFA mRNAs are translatable after being internalized by the recipient cell. Concomitantly, the cancer EVs induced VEGFA-dependent angiogenesis and upregulated epithelial-mesenchymal transition-related genes. Our findings reveal that the EV-mRNA profile can reflect the cell malignancy, and the intercellular transfer of these mRNAs can contribute toward tumor angiogenesis. Abstract Cancer-derived extracellular vesicles (EVs) have been demonstrated to be implicated in various processes of cancer development, with most of the EV-induced changes attributed to EV-proteins and EV-microRNAs. However, the knowledge about the abundance of cancer EV-mRNAs and their contribution to cancer development remain elusive. Here, we show that mRNAs prevail in cancer EVs as compared with normal EVs, and cancer EVs that carry abundant angiogenic mRNAs activate angiogenesis in human umbilical vein endothelial cells (HUVECs). Specifically, of a gene panel comprising 61 hypoxia-targeted oncogenes, a larger proportion is harbored by cancer EVs (>40%) than normal EVs (14.8%). Fluorescent trafficking indicates cancer EVs deliver translatable mRNAs such as VEGFA to HUVECs, contributing to the activation of VEGFR-dependent angiogenesis and the upregulation of epithelial-mesenchymal transition-related and metabolism-related genes. Overall, our findings provide novel insights into EV-mRNAs and their role in angiogenesis, and has potential for diagnostic and therapeutic applications.
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Affiliation(s)
- Pan Zhang
- NUS Graduate School—Integrative Sciences and Engineering Programme (ISEP), National University of Singapore, Singapore 119077, Singapore;
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore;
| | - Su Bin Lim
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore;
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Kuan Jiang
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore; (K.J.); (T.W.C.)
| | - Ti Weng Chew
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore; (K.J.); (T.W.C.)
| | - Boon Chuan Low
- NUS Graduate School—Integrative Sciences and Engineering Programme (ISEP), National University of Singapore, Singapore 119077, Singapore;
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore; (K.J.); (T.W.C.)
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
- University Scholars Programme, National University of Singapore, Singapore 138593, Singapore
- Correspondence: (B.C.L.); (C.T.L.)
| | - Chwee Teck Lim
- NUS Graduate School—Integrative Sciences and Engineering Programme (ISEP), National University of Singapore, Singapore 119077, Singapore;
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore;
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore; (K.J.); (T.W.C.)
- Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore 117599, Singapore
- Correspondence: (B.C.L.); (C.T.L.)
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Remsburg C, Testa M, Song JL. Rab35 regulates skeletogenesis and gastrulation by facilitating actin remodeling and vesicular trafficking. Cells Dev 2021; 165:203660. [PMID: 34024337 DOI: 10.1016/j.cdev.2021.203660] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/11/2020] [Accepted: 12/21/2020] [Indexed: 11/15/2022]
Abstract
Rab35 is a small GTPase that regulates plasma membrane to early endosome vesicular trafficking and mediates actin remodeling to form actin-rich cellular structures. While the function of Rab35 in the cellular context has been examined, its role during development has not been well studied. In this study, we take advantage of the sea urchin's high fecundity, external fertilization, and transparent embryos to determine the function of Rab35 during development. We found that loss of function of Rab35 results in defects in skeletogenesis and gastrulation, which were rescued by co-injection of sea urchin Rab35. The loss of Rab35's function results in decreased endocytosis and impaired exocytosis, which may be important for skeletogenesis and gastrulation. Skeletal spicules of Rab35 knockdown embryos have reduced organized actin compared to the control, supporting the notion that Rab35 regulates actin dynamics. In addition, the skeletal and gastrulation defects induced by Rab35 knockdown were rescued by co-injection with Fascin, an actin-bundling protein, indicating that proper actin dynamics play a critical role for both skeletogenesis and gastrulation. Overall, results indicate that through its role in mediating vesicular trafficking and actin remodeling, Rab35 is an important regulator of embryonic structure formation in early development.
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Affiliation(s)
- Carolyn Remsburg
- University of Delaware, Department of Biological Sciences, Newark, DE, USA
| | - Michael Testa
- University of Delaware, Department of Biological Sciences, Newark, DE, USA
| | - Jia L Song
- University of Delaware, Department of Biological Sciences, Newark, DE, USA.
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9
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Ko SY, Naora H. Extracellular Vesicle Membrane-Associated Proteins: Emerging Roles in Tumor Angiogenesis and Anti-Angiogenesis Therapy Resistance. Int J Mol Sci 2020; 21:E5418. [PMID: 32751440 PMCID: PMC7432555 DOI: 10.3390/ijms21155418] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/28/2020] [Accepted: 07/28/2020] [Indexed: 12/11/2022] Open
Abstract
The tumor vasculature is essential for tumor growth and metastasis, and is a prime target of several anti-cancer agents. Increasing evidence indicates that tumor angiogenesis is stimulated by extracellular vesicles (EVs) that are secreted or shed by cancer cells. These EVs encapsulate a variety of biomolecules with angiogenic properties, and have been largely thought to stimulate vessel formation by transferring this luminal cargo into endothelial cells. However, recent studies have revealed that EVs can also signal to recipient cells via proteins on the vesicular surface. This review discusses and integrates emerging insights into the diverse mechanisms by which proteins associate with the EV membrane, the biological functions of EV membrane-associated proteins in tumor angiogenesis, and the clinical significance of these proteins in anti-angiogenic therapy.
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Affiliation(s)
| | - Honami Naora
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
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10
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Ganta VC, Choi M, Farber CR, Annex BH. Antiangiogenic VEGF 165b Regulates Macrophage Polarization via S100A8/S100A9 in Peripheral Artery Disease. Circulation 2019; 139:226-242. [PMID: 30586702 DOI: 10.1161/circulationaha.118.034165] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Atherosclerotic occlusions decrease blood flow to the lower limbs, causing ischemia and tissue loss in patients with peripheral artery disease (PAD). No effective medical therapies are currently available to induce angiogenesis and promote perfusion recovery in patients with severe PAD. Clinical trials aimed at inducing vascular endothelial growth factor (VEGF)-A levels, a potent proangiogenic growth factor to induce angiogenesis, and perfusion recovery were not successful. Alternate splicing in the exon-8 of VEGF-A results in the formation of VEGFxxxa (VEGF165a) and VEGFxxxb (VEGF165b) isoforms with existing literature focusing on VEGF165b's role in inhibiting vascular endothelial growth factor receptor 2-dependent angiogenesis. However, we have recently shown that VEGF165b blocks VEGF-A-induced endothelial vascular endothelial growth factor receptor 1 (VEGFR1) activation in ischemic muscle to impair perfusion recovery. Because macrophage-secreted VEGF165b has been shown to decrease angiogenesis in peripheral artery disease, and macrophages were well known to play important roles in regulating ischemic muscle vascular remodeling, we examined the role of VEGF165b in regulating macrophage function in PAD. METHODS Femoral artery ligation and resection were used as an in vivo preclinical PAD model, and hypoxia serum starvation was used as an in vitro model for PAD. Experiments including laser-Doppler perfusion imaging, adoptive cell transfer to ischemic muscle, immunoblot analysis, ELISAs, immunostainings, flow cytometry, quantitative polymerase chain reaction analysis, and RNA sequencing were performed to determine a role of VEGF165b in regulating macrophage phenotype and function in PAD. RESULTS First, we found increased VEGF165b expression with increased M1-like macrophages in PAD versus non-PAD (controls) muscle biopsies. Next, using in vitro hypoxia serum starvation, in vivo pre clinical PAD models, and adoptive transfer of VEGF165b-expressing bone marrow-derived macrophages or VEGFR1+/- bone marrow-derived macrophages (M1-like phenotype), we demonstrate that VEGF165b inhibits VEGFR1 activation to induce an M1-like phenotype that impairs ischemic muscle neovascularization. Subsequently, we found S100A8/S100A9 as VEGFR1 downstream regulators of macrophage polarization by RNA-Seq analysis of hypoxia serum starvation-VEGFR1+/+ versus hypoxia serum starvation-VEGFR1+/- bone marrow-derived macrophages. CONCLUSIONS In our current study, we demonstrate that increased VEGF165b expression in macrophages induces an antiangiogenic M1-like phenotype that directly impairs angiogenesis. VEGFR1 inhibition by VEGF165b results in S100A8/S100A9-mediated calcium influx to induce an M1-like phenotype that impairs ischemic muscle revascularization and perfusion recovery.
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Affiliation(s)
- Vijay Chaitanya Ganta
- Robert M. Berne Cardiovascular Research Center (V.C.G., M.C., B.H.A.), University of Virginia, Charlottesville.,Division Cardiovascular Medicine, Department of Medicine (V.C.G., B.H.A.), University of Virginia, Charlottesville
| | - Min Choi
- Robert M. Berne Cardiovascular Research Center (V.C.G., M.C., B.H.A.), University of Virginia, Charlottesville
| | - Charles R Farber
- Department of Public Health Sciences (C.R.F.), University of Virginia, Charlottesville
| | - Brian H Annex
- Robert M. Berne Cardiovascular Research Center (V.C.G., M.C., B.H.A.), University of Virginia, Charlottesville.,Division Cardiovascular Medicine, Department of Medicine (V.C.G., B.H.A.), University of Virginia, Charlottesville
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11
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Expression and Characterization of Human Vascular Endothelial Growth Factor Produced in SiHa Cells Transduced with Adenoviral Vector. Protein J 2019; 38:693-703. [DOI: 10.1007/s10930-019-09867-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Garrido MP, Torres I, Vega M, Romero C. Angiogenesis in Gynecological Cancers: Role of Neurotrophins. Front Oncol 2019; 9:913. [PMID: 31608227 PMCID: PMC6761325 DOI: 10.3389/fonc.2019.00913] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 09/02/2019] [Indexed: 12/13/2022] Open
Abstract
Angiogenesis, or generation of new blood vessels from other pre-existing, is a key process to maintain the supply of nutrients and oxygen in tissues. Unfortunately, this process is exacerbated in pathologies such as retinopathies and cancers with high angiogenesis as ovarian cancer. Angiogenesis is regulated by multiple systems including growth factors and neurotrophins. One of the most studied angiogenic growth factors is the vascular endothelial growth factor (VEGF), which is overexpressed in several cancers. It has been recently described that neurotrophins could regulate angiogenesis through direct and indirect mechanisms. Neurotrophins are a family of proteins that include nerve growth factor (NGF), brain-derived growth factor (BDNF), and neurotrophins 3 and 4/5 (NT 3, NT 4/5). These molecules and their high affinity receptors (TRKs) regulate the development, maintenance, and plasticity of the nervous system. Furthermore, it was recently described that they display essential functions in non-neuronal tissues, such as reproductive organs among others. Studies have shown that several types of cancer overexpress neurotrophins such as NGF and BDNF, which might contribute to tumor progression and angiogenesis. Besides, in recent years the FDA has approved the use of pharmacologic inhibitors of pan-TRK receptors in patients with TRKs fusion-positive cancers. In this review, we discuss the mechanisms by which neurotrophins stimulate tumor progression and angiogenesis, with emphasis on gynecological cancers.
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Affiliation(s)
- Maritza P Garrido
- Laboratory of Endocrinology and Reproductive Biology, Hospital Clínico Universidad de Chile, Santiago, Chile.,Departamento de Obstetricia y Ginecología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Ignacio Torres
- Laboratory of Endocrinology and Reproductive Biology, Hospital Clínico Universidad de Chile, Santiago, Chile
| | - Margarita Vega
- Laboratory of Endocrinology and Reproductive Biology, Hospital Clínico Universidad de Chile, Santiago, Chile.,Departamento de Obstetricia y Ginecología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Carmen Romero
- Laboratory of Endocrinology and Reproductive Biology, Hospital Clínico Universidad de Chile, Santiago, Chile.,Departamento de Obstetricia y Ginecología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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13
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Krishnasamy S, Ravi V, Rajaraman B, Kumar Thulasingam S, Dhevasena CS, Pathak A, Swaminathan K, Sundaresan M, Ayyappa KA, Arunkumar G, Kuppan G, Ramadas N, Vedantham S. Role of VEGF 165b/VEGF TOTAL ratio in gestational diabetes mellitus. Gynecol Endocrinol 2019; 35:811-814. [PMID: 30964350 DOI: 10.1080/09513590.2019.1595576] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Proper vascular function is important for well-being of mother and growing fetus. VEGFTOTAL, and VEGF165b levels and its vascular endothelial complications in gestational diabetes mellitus (GDM) together with the association of inflammation and advanced glycation end products (AGEs) are less studied. VEGF165b/VEGFTOTAL (VEGF RATIO) in GDM pregnant women was investigated in this study. Plasma VEGFTOTAL was lower in GDM (17.68 ± 1.30 pg/mL) compared to non-GDM (25.69 ± 1.40 pg/mL). VEGF165b, ICAM-1, and AGEs were higher in GDM (9.9 ± 1.4 pg/mL, 201.04 ± 7.85 µg/mL, and 10.40 ± 0.98 µg/mL, respectively) and lower in non-GDM (6.47 ± 0.70 pg/mL, 174.1 ± 7.11 µg/mL, and 4.71 ± 0.39 µg/mL, respectively). Compared to non GDM (0.25 ± 0.02), VEGF RATIO was higher in GDM (0.45 ± 0.04) and correlated with -ICAM-1 (r = 0.375, p < .001) and AGEs (r = 0.199, p < .05). Tertile stratification of VEGF RATIO implied that frequency of GDM increases with increasing tertiles of VEGF RATIO (p for trend <.001). Association of VEGF RATIO with GDM was significant even after adjusting for AGEs (OR = 1.279, CI = 1.118-1.462, p < .0010) but it lost its significance when adjusted for ICAM-1 (OR = 1.006, CI = 0.995-1.017, p = .308). VEGF RATIO plays an important role in GDM in association with vascular inflammation.
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Affiliation(s)
- Sundar Krishnasamy
- a School of Chemical and Biotechnology, SASTRA Deemed to be University , Thanjavur , India
| | - Vidya Ravi
- b Department of Obstetrics & Gynaecology, K.A.P. Viswanatham Government Medical College , Tiruchirapalli , India
| | - Barathi Rajaraman
- a School of Chemical and Biotechnology, SASTRA Deemed to be University , Thanjavur , India
| | | | - C S Dhevasena
- c Department of Obstetrics & Gynaecology, Kovai Medical Centre and Hospital , Coimbatore , India
| | - Atima Pathak
- c Department of Obstetrics & Gynaecology, Kovai Medical Centre and Hospital , Coimbatore , India
| | - Krishnan Swaminathan
- d Department of Endocrinology, Kovai Medical Centre and Hospital and Research Foundation , Coimbatore , India
| | - Mohanraj Sundaresan
- d Department of Endocrinology, Kovai Medical Centre and Hospital and Research Foundation , Coimbatore , India
| | | | - Ganeshprasad Arunkumar
- a School of Chemical and Biotechnology, SASTRA Deemed to be University , Thanjavur , India
| | - Gokulakrishnan Kuppan
- e Department of Research Biochemistry, Madras Diabetes Research Foundation, Chennai , India
| | - Nirupama Ramadas
- a School of Chemical and Biotechnology, SASTRA Deemed to be University , Thanjavur , India
| | - Srinivasan Vedantham
- a School of Chemical and Biotechnology, SASTRA Deemed to be University , Thanjavur , India
- f Division of R&D, MedGenome Labs Ltd , Bengaluru , India
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14
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Lu FI, Wang YT, Wang YS, Wu CY, Li CC. Involvement of BIG1 and BIG2 in regulating VEGF expression and angiogenesis. FASEB J 2019; 33:9959-9973. [PMID: 31199673 DOI: 10.1096/fj.201900342rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
VEGF stimulates the formation of new blood vessels by inducing endothelial cell (EC) proliferation and migration. Brefeldin A (BFA)-inhibited guanine nucleotide-exchange protein (BIG)1 and 2 accelerate the replacement of bound GDP with GTP to activate ADP-ribosylation factor (Arf)1, which regulates vesicular transport between the Golgi and plasma membrane. Although it has been reported that treating cells with BFA interferes with Arf1 activation to inhibit VEGF secretion, the role of BIG1 and BIG2 in VEGF trafficking and expression, EC migration and proliferation, and vascular development remains unknown. Here, we found that inactivation of Arf1 reduced VEGF secretion but did not affect the levels of VEGF protein. Interestingly, however, BIG1 and BIG2 knockdown significantly decreased the levels of VEGF mRNA and protein in glioblastoma U251 cells and HUVECs. Furthermore, depletion of BIG1 and BIG2 inhibited HUVEC angiogenesis by diminishing cell migration. Angioblast migration and intersegmental vessel sprouting were also impaired when the BIG2 homolog, Arf guanine nucleotide exchange factor (arfgef)2, was knocked down in zebrafish with endothelial expression of green fluorescent protein (GFP). Depletion of arfgef2 by clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) also caused defects in vascular development of zebrafish embryos. Taken together, these data reveal that BIG1 and BIG2 participate in endothelial cell angiogenesis.-Lu, F.-I., Wang, Y.-T., Wang, Y.-S., Wu, C.-Y., Li, C.-C. Involvement of BIG1 and BIG2 in regulating VEGF expression and angiogenesis.
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Affiliation(s)
- Fu-I Lu
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan.,The Integrative Evolutionary Galliforms Genomics Research (iEGG) and Animal Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Yi-Ting Wang
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Shan Wang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chang-Yi Wu
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chun-Chun Li
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
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15
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Hapten-mediated recruitment of polyclonal antibodies to tumors engenders antitumor immunity. Nat Commun 2018; 9:3348. [PMID: 30135425 PMCID: PMC6105580 DOI: 10.1038/s41467-018-05566-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 07/11/2018] [Indexed: 12/30/2022] Open
Abstract
Uptake of tumor antigens by tumor-infiltrating dendritic cells is limiting step in the induction of tumor immunity, which can be mediated through Fc receptor (FcR) triggering by antibody-coated tumor cells. Here we describe an approach to potentiate tumor immunity whereby hapten-specific polyclonal antibodies are recruited to tumors by coating tumor cells with the hapten. Vaccination of mice against dinitrophenol (DNP) followed by systemic administration of DNP targeted to tumors by conjugation to a VEGF or osteopontin aptamer elicits potent FcR dependent, T cell mediated, antitumor immunity. Recruitment of αGal-specific antibodies, the most abundant naturally occurring antibodies in human serum, inhibits tumor growth in mice treated with a VEGF aptamer-αGal hapten conjugate, and recruits antibodies from human serum to human tumor biopsies of distinct origin. Thus, treatment with αGal hapten conjugated to broad-spectrum tumor targeting ligands could enhance the susceptibility of a broad range of tumors to immune elimination.
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16
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Eggers R, Philippi A, Altmeyer MO, Breinig F, Schmitt MJ. Primary T cells for mRNA-mediated immunotoxin delivery. Gene Ther 2018; 25:47-53. [PMID: 28937681 DOI: 10.1038/gt.2017.87] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 08/23/2017] [Accepted: 09/18/2017] [Indexed: 12/30/2022]
Abstract
Immune cells become increasingly attractive as delivery system for immunotoxins in cancer therapy to reduce the intrinsic toxicity and severe side effects of chimeric protein toxins. In this study, we investigated the potential of human primary T cells to deliver a secreted immunotoxin through transient messenger RNA (mRNA) transfection. The chimeric protein toxin was directed toward the neovasculature of cancer cells by fusing a truncated version of Pseudomonas exotoxin A (PE38) to human vascular endothelial growth factor (VEGF) and to the single chain variable fragment (scFv) of anti-Her2/neu. Protocols for the transient transfection of human embryonic kidney cells (HEK293) as well as activated primary human T cells were established. Transient transfection with mRNA coding for the immunotoxins e23-PE38, VEGF-PE38 and its attenuated variant VEGF-PE38D yielded efficient expression and secretion. Mass spectrometry analysis endorsed that a fraction of VEGF-PE38D was properly translocated into the endoplasmic reticulum. Furthermore, cytotoxic activity of immunotoxin secreting T cells toward cancer cells was confirmed in co-culture with ovarian adenocarcinoma cells in the presence of a bispecific antibody (bsAb), highlighting the potential of primary T cells for mRNA-mediated immunotoxin delivery.
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Affiliation(s)
- R Eggers
- Environmental safety group, Korea Institute of Science and Technology (KIST Europe), Saarbrücken, Germany
| | - A Philippi
- Environmental safety group, Korea Institute of Science and Technology (KIST Europe), Saarbrücken, Germany
| | - M O Altmeyer
- Environmental safety group, Korea Institute of Science and Technology (KIST Europe), Saarbrücken, Germany
| | - F Breinig
- Department of Biosciences, Molecular and Cell Biology and Center of Human and Molecular Biology (ZHMB), Saarland University, Saarbrücken, Germany
| | - M J Schmitt
- Department of Biosciences, Molecular and Cell Biology and Center of Human and Molecular Biology (ZHMB), Saarland University, Saarbrücken, Germany
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17
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Kinslechner K, Schörghofer D, Schütz B, Vallianou M, Wingelhofer B, Mikulits W, Röhrl C, Hengstschläger M, Moriggl R, Stangl H, Mikula M. Malignant Phenotypes in Metastatic Melanoma are Governed by SR-BI and its Association with Glycosylation and STAT5 Activation. Mol Cancer Res 2017; 16:135-146. [PMID: 28974560 DOI: 10.1158/1541-7786.mcr-17-0292] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/10/2017] [Accepted: 09/29/2017] [Indexed: 01/04/2023]
Abstract
Metastatic melanoma is hallmarked by elevated glycolytic flux and alterations in cholesterol homeostasis. The contribution of cholesterol transporting receptors for the maintenance of a migratory and invasive phenotype is not well defined. Here, the scavenger receptor class B type I (SCARB1/SR-BI), a high-density lipoprotein (HDL) receptor, was identified as an estimator of melanoma progression in patients. We further aimed to identify the SR-BI-controlled gene expression signature and its related cellular phenotypes. On the basis of whole transcriptome analysis, it was found that SR-BI knockdown, but not functional inhibition of its cholesterol-transporting capacity, perturbed the metastasis-associated epithelial-to-mesenchymal transition (EMT) phenotype. Furthermore, SR-BI knockdown was accompanied by decreased migration and invasion of melanoma cells and reduced xenograft tumor growth. STAT5 is an important mediator of the EMT process and loss of SR-BI resulted in decreased glycosylation, reduced DNA binding, and target gene expression of STAT5. When human metastatic melanoma clinical specimens were analyzed for the abundance of SR-BI and STAT5 protein, a positive correlation was found. Finally, a novel SR-BI-regulated gene profile was determined, which discriminates metastatic from nonmetastatic melanoma specimens indicating that SR-BI drives gene expression contributing to growth at metastatic sites. Overall, these results demonstrate that SR-BI is a highly expressed receptor in human metastatic melanoma and is crucial for the maintenance of the metastatic phenotype.Implications: High SR-BI expression in melanoma is linked with increased cellular glycosylation and hence is essential for a metastasis-specific expression signature. Mol Cancer Res; 16(1); 135-46. ©2017 AACR.
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Affiliation(s)
- Katharina Kinslechner
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - David Schörghofer
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Birgit Schütz
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Maria Vallianou
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Bettina Wingelhofer
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine, Vienna, Austria.,Medical University of Vienna, Vienna, Austria
| | - Wolfgang Mikulits
- Department of Medicine I, Division: Institute of Cancer Research, Comprehensive Cancer Center, Vienna, Medical University of Vienna, Vienna, Austria
| | - Clemens Röhrl
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Markus Hengstschläger
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Richard Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine, Vienna, Austria.,Medical University of Vienna, Vienna, Austria
| | - Herbert Stangl
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Mario Mikula
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria.
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18
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Luo M, Huang H, Hou L, Shao S, Huang S, Zhao X. Construction and expression of a lentivirus expression vector carrying the VEGF165-EGFP fusion gene in breast cancer MCF-7 cells. Oncol Lett 2017; 13:1745-1752. [PMID: 28454319 DOI: 10.3892/ol.2017.5601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 07/26/2016] [Indexed: 02/06/2023] Open
Abstract
Vascular endothelial growth factor (VEGF)165 is one of the most abundant and potent angiogenic factors in both physiological and pathological conditions. However, the function and mechanism of VEGF165 in tumors and their environment remain to be elucidated. In the present study, a lentivirus vector (LV) that contained the VEGF165-enhanced green fluorescent protein (EGFP) fusion gene was constructed and transfected into the human breast cancer cell line MCF-7. Following transfection, the expression of VEGF165 in MCF-7 cells was detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blotting. Further cellular localization of VEGF165 was observed through fluorescence microscopy. The titer of the recombinant lentivirus was 5.44×107 TU/ml in the LV-VEGF165-EGFP group and 5.00×108 TU/ml in the LV-EGFP negative control group. RT-qPCR and western blotting demonstrated that the expression of VEGF165 was significantly increased in the LV-VEGF165-EGFP group compared with the control group. The present study lays the foundation for in vitro and in vivo studies on tumor cell derived-VEGF165. Furthermore, the present fusion gene expression vector may provide a potential approach for gene therapy treatment of cancer and other diseases that require regulation of angiogenesis.
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Affiliation(s)
- Minna Luo
- Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Huan Huang
- Department of Radiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Lei Hou
- Department of Oncology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Shan Shao
- Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Shangke Huang
- Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xinhan Zhao
- Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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19
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Tien WS, Chen JH, Wu KP. SheddomeDB: the ectodomain shedding database for membrane-bound shed markers. BMC Bioinformatics 2017; 18:42. [PMID: 28361715 PMCID: PMC5374707 DOI: 10.1186/s12859-017-1465-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND A number of membrane-anchored proteins are known to be released from cell surface via ectodomain shedding. The cleavage and release of membrane proteins has been shown to modulate various cellular processes and disease pathologies. Numerous studies revealed that cell membrane molecules of diverse functional groups are subjected to proteolytic cleavage, and the released soluble form of proteins may modulate various signaling processes. Therefore, in addition to the secreted protein markers that undergo secretion through the secretory pathway, the shed membrane proteins may comprise an additional resource of noninvasive and accessible biomarkers. In this context, identifying the membrane-bound proteins that will be shed has become important in the discovery of clinically noninvasive biomarkers. Nevertheless, a data repository for biological and clinical researchers to review the shedding information, which is experimentally validated, for membrane-bound protein shed markers is still lacking. RESULTS In this study, the database SheddomeDB was developed to integrate publicly available data of the shed membrane proteins. A comprehensive literature survey was performed to collect the membrane proteins that were verified to be cleaved or released in the supernatant by immunological-based validation experiments. From 436 studies on shedding, 401 validated shed membrane proteins were included, among which 199 shed membrane proteins have not been annotated or validated yet by existing cleavage databases. SheddomeDB attempted to provide a comprehensive shedding report, including the regulation of shedding machinery and the related function or diseases involved in the shedding events. In addition, our published tool ShedP was embedded into SheddomeDB to support researchers for predicting the shedding event on unknown or unrecorded membrane proteins. CONCLUSIONS To the best of our knowledge, SheddomeDB is the first database for the identification of experimentally validated shed membrane proteins and currently may provide the most number of membrane proteins for reviewing the shedding information. The database included membrane-bound shed markers associated with numerous cellular processes and diseases, and some of these markers are potential novel markers because they are not annotated or validated yet in other databases. SheddomeDB may provide a useful resource for discovering membrane-bound shed markers. The interactive web of SheddomeDB is publicly available at http://bal.ym.edu.tw/SheddomeDB/ .
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Affiliation(s)
- Wei-Sheng Tien
- Institute of Biomedical Informatics, National Yang Ming University, Taipei, 112, Taiwan.,Bioinformatics Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 115, Taiwan
| | - Jun-Hong Chen
- Department of Computer Science, National Taipei University of Education, Taipei, 106, Taiwan
| | - Kun-Pin Wu
- Institute of Biomedical Informatics, National Yang Ming University, Taipei, 112, Taiwan.
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20
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Michishita M, Ohtsuka A, Nakahira R, Tajima T, Nakagawa T, Sasaki N, Arai T, Takahashi K. Anti-tumor effect of bevacizumab on a xenograft model of feline mammary carcinoma. J Vet Med Sci 2015; 78:685-9. [PMID: 26616000 PMCID: PMC4873862 DOI: 10.1292/jvms.15-0550] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Feline mammary carcinomas are characterized by rapid progression and metastases. Vascular
endothelial growth factor (VEGF) is a key regulator of tumor angiogenesis, proliferation
and metastasis. The present study aimed to investigate the effects of a single drug
therapy of bevacizumab on a xenograft model of feline mammary carcinoma expressing VEGF
protein. Bevacizumab treatment suppressed tumor growth by inhibiting angiogenesis and
enhancing apoptosis; however, it did not affect the tumor proliferation index. Thus,
bevacizumab had anti-tumor effects on a xenograft model, and this may be useful for the
treatment of feline mammary carcinoma.
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Affiliation(s)
- Masaki Michishita
- Department of Veterinary Pathology, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino, Tokyo 180-8602, Japan
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21
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Egervari K, Potter G, Guzman-Hernandez ML, Salmon P, Soto-Ribeiro M, Kastberger B, Balla T, Wehrle-Haller B, Kiss JZ. Astrocytes spatially restrict VEGF signaling by polarized secretion and incorporation of VEGF into the actively assembling extracellular matrix. Glia 2015; 64:440-56. [PMID: 26539695 DOI: 10.1002/glia.22939] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 01/13/2023]
Abstract
The spatial organization of vascular endothelial growth factor (VEGF) signaling is a key determinant of vascular patterning during development and tissue repair. How VEGF signaling becomes spatially restricted and the role of VEGF secreting astrocytes in this process remains poorly understood. Using a VEGF-GFP fusion protein and confocal time-lapse microscopy, we observed the intracellular routing, secretion and immobilization of VEGF in scratch-activated living astrocytes. We found VEGF to be directly transported to cell-extracellular matrix attachments where it is incorporated into fibronectin fibrils. VEGF accumulated at β1 integrin containing fibrillar adhesions and was translocated along the cell surface prior to internalization and degradation. We also found that only the astrocyte-derived, matrix-bound, and not soluble VEGF decreases β1 integrin turnover in fibrillar adhesions. We suggest that polarized VEGF release and ECM remodeling by VEGF secreting cells is key to control the local concentration and signaling of VEGF. Our findings highlight the importance of astrocytes in directing VEGF functions and identify these mechanisms as promising target for angiogenic approaches.
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Affiliation(s)
| | - Gael Potter
- Department of Neurosciences, University of Geneva, Switzerland
| | - Maria Luisa Guzman-Hernandez
- Section on Molecular Signal Transduction, Program for Developmental Neuroscience, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Patrick Salmon
- Department of Neurosciences, University of Geneva, Switzerland
| | | | - Birgit Kastberger
- Department of Cell Physiology and Metabolism, University of Geneva, Switzerland
| | - Tamas Balla
- Section on Molecular Signal Transduction, Program for Developmental Neuroscience, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
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22
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Davila J, Laws MJ, Kannan A, Li Q, Taylor RN, Bagchi MK, Bagchi IC. Rac1 Regulates Endometrial Secretory Function to Control Placental Development. PLoS Genet 2015; 11:e1005458. [PMID: 26305333 PMCID: PMC4549291 DOI: 10.1371/journal.pgen.1005458] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 07/21/2015] [Indexed: 01/14/2023] Open
Abstract
During placenta development, a succession of complex molecular and cellular interactions between the maternal endometrium and the developing embryo ensures reproductive success. The precise mechanisms regulating this maternal-fetal crosstalk remain unknown. Our study revealed that the expression of Rac1, a member of the Rho family of GTPases, is markedly elevated in mouse decidua on days 7 and 8 of gestation. To investigate its function in the uterus, we created mice bearing a conditional deletion of the Rac1 gene in uterine stromal cells. Ablation of Rac1 did not affect the formation of the decidua but led to fetal loss in mid gestation accompanied by extensive hemorrhage. To gain insights into the molecular pathways affected by the loss of Rac1, we performed gene expression profiling which revealed that Rac1 signaling regulates the expression of Rab27b, another GTPase that plays a key role in targeting vesicular trafficking. Consequently, the Rac1-null decidual cells failed to secrete vascular endothelial growth factor A, which is a critical regulator of decidual angiogenesis, and insulin-like growth factor binding protein 4, which regulates the bioavailability of insulin-like growth factors that promote proliferation and differentiation of trophoblast cell lineages in the ectoplacental cone. The lack of secretion of these key factors by Rac1-null decidua gave rise to impaired angiogenesis and dysregulated proliferation of trophoblast cells, which in turn results in overexpansion of the trophoblast giant cell lineage and disorganized placenta development. Further experiments revealed that RAC1, the human ortholog of Rac1, regulates the secretory activity of human endometrial stromal cells during decidualization, supporting the concept that this signaling G protein plays a central and conserved role in controlling endometrial secretory function. This study provides unique insights into the molecular mechanisms regulating endometrial secretions that mediate stromal-endothelial and stromal-trophoblast crosstalk critical for placenta development and establishment of pregnancy. During early pregnancy, a succession of molecular interactions between the uterus and the developing embryo ensures reproductive success. Although it is conceivable that signaling cues originating in the uterus impact on the developing embryo at the time of placenta establishment, the precise mechanisms regulating the maternal-fetal crosstalk remain unknown. Impaired uterine functions during early pregnancy are likely to contribute to abnormal embryo development and various diseases of pregnancy, such as recurrent miscarriage, preeclampsia, and intrauterine growth restriction. This study provides insights into the molecular mechanisms by which Rac1, a signaling molecule expressed in the decidua, controls uterine secretions that mediate maternal-fetal communication critical for placental development and establishment of pregnancy.
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Affiliation(s)
- Juanmahel Davila
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Mary J. Laws
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Athilakshmi Kannan
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Quanxi Li
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Robert N. Taylor
- Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Milan K. Bagchi
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- * E-mail: (MKB); (ICB)
| | - Indrani C. Bagchi
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- * E-mail: (MKB); (ICB)
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23
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Wang S, Chen Z, Tang X, Liu H, Yang L, Wang Y. Transplantation of vascular endothelial growth factor 165‑transfected endothelial progenitor cells for the treatment of limb ischemia. Mol Med Rep 2015; 12:4967-74. [PMID: 26239164 PMCID: PMC4581802 DOI: 10.3892/mmr.2015.4100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 06/22/2015] [Indexed: 12/01/2022] Open
Abstract
The present study aimed to investigate the effects of neovascularization in rabbits with limb ischemia transplanted with vascular endothelial growth factor (VEGF)165-transfected endothelial progenitor cells (EPC). Bone marrow mononuclear cells were isolated by gradient centrifugation, cultured in M199 culture medium and induced into EPCs using VEGF, basic fibroblast growth factor, and insulin-like growth factor-1, and subsequently identified. The EPCs were transfected with Adv-green fluorescent protein-VEGF165 and the proliferation potential of the cells was determined using an MTT assay. The protein expression levels of VEGF were measured by detecting its concentration levels in the supernatant using an ABC-ELISA assay. A rabbit hind limb ischemic model was established and randomly divided into three groups: (A) Control group, (B) EPC-transplanted group, and (C) Ad-VEGF165/EPCs-transplanted group. The effects of transplantation and the levels of recanalization were detected. Incorporation of the transplanted cells into the ischemic region was confirmed by 5-bromodeoxyuridine staining, and the levels of recanalization were measured by computer tomography ateriography and immunohistochemical staining. Bone marrow-derived EPCs were induced, cultivated, and successfully identified. The results of the present study determined the optimum transfection ratio that promoted the growth of EPCs. The EPCs were successfully transfected with VEGF165, and EPC proliferation was not affected by the transfection. The supernatant protein concentration levels of VEGF were markedly higher in the VEGF165-transfected group, as compared with those of the control group. Introduction of the transplanted cells into the ischemic region of group C occurred more efficiently, as compared with groups A and B. The recanalization capillary density in group C was significantly higher, as compared with groups A and B. VEGF gene transfection was able to improve the quality of EPCs, and the response of rabbits with limb ischemia to transplantation with VEGF-transfected EPCs was significantly better, as compared with transplantation with EPCs alone.
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Affiliation(s)
- Sheng Wang
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Zhong Chen
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Xiaobin Tang
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Hui Liu
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Liao Yang
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Yanyang Wang
- Department of Vascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
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Regulation of vascular endothelial growth factor by metabolic context of the cell. Glycoconj J 2015; 31:427-34. [PMID: 25214198 DOI: 10.1007/s10719-014-9547-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Expression of vascular endothelial growth factor, major endothelial specific glycoprotein growth factor that promotes angiogenesis is regulated at transcriptional, post transcriptional and posttranslational levels. One of the key posttranslational modifications involved in regulating the angiogenic potential of VEGF is covalent modification involving polyADP ribosylation. Major factors contributing to the regulation of VEGF include factors relating to hypoxia, growth factors and cytokines and hormones. Apart from these, the metabolite status of the cell as sensed by various metabolite regulators can influence the angiogenic potential. Changes in the metabolite status of the cell occur during different conditions associated with excessive or insufficient angiogenesis contributing to pathology. Effect of metabolites, as exemplified by certain metabolites such as lactate, citrate, sarcosine, metabolites of arachidonic acid on angiogenesis through the regulation of expression of VEGF as well as its angiogenic potential through polyADP ribosylation is discussed.
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Paeoniflorin attenuates Aβ1-42-induced inflammation and chemotaxis of microglia in vitro and inhibits NF-κB- and VEGF/Flt-1 signaling pathways. Brain Res 2015; 1618:149-58. [PMID: 26049130 DOI: 10.1016/j.brainres.2015.05.035] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/25/2015] [Accepted: 05/26/2015] [Indexed: 01/08/2023]
Abstract
Alzheimer׳s disease (AD) is a neurodegenerative disease with elusive pathogenesis, which accounts for most cases of dementia in the aged population. It has been reported that persistent inflammatory responses and excessive chemotaxis of microglia stimulated by beta-amyloid (Aβ) oligomers in the brain may accelerate the progression of AD. The present study was conducted to explore whether paeoniflorin (PF), a water-soluble monoterpene glycoside isolated from the root of Paeonia lactiflora Pallas, could attenuate Aβ1-42-induced toxic effects on primary and BV-2 microglial cells in vitro. Our data showed that PF pretreatment inhibited Aβ1-42-induced production of tumor necrosis factor (TNF)-α, interleukin (IL)-1β and IL-6 in rodent microglia. Also, the nuclear translocation of nuclear factor kappa B (NF-κB) subunit p65 and the phosphorylation of NF-κB inhibitor alpha (IκBα) in Aβ1-42-stimulated microglial cells were suppressed by PF administration. Moreover, PF treatment reduced the release of chemokine (C-X-C motif) ligand 1 (CXCL1) and chemokine (C-C motif) ligand 2 (CCL-2) from Aβ1-42-stimulated microglia. Additionally, application of PF inhibited the increases in vascular endothelial growth factor (VEGF) and VEGF receptor 1 (Flt-1) triggered by Aβ1-42, and resulted in a concomitant reduction in microglial chemotaxis. Restoration of VEGF was noted to counteract the inhibitory effect of PF, suggesting that PF mitigated Aβ1-42-elicited microglial migration at least partly by suppressing the VEGF/Flt-1 axis. In summary, in presence of Aβ1-42, PF pretreatment inhibited the excessive microglial activation and chemotaxis.
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Fan X, Rai A, Kambham N, Sung JF, Singh N, Petitt M, Dhal S, Agrawal R, Sutton RE, Druzin ML, Gambhir SS, Ambati BK, Cross JC, Nayak NR. Endometrial VEGF induces placental sFLT1 and leads to pregnancy complications. J Clin Invest 2014; 124:4941-52. [PMID: 25329693 DOI: 10.1172/jci76864] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 08/21/2014] [Indexed: 12/27/2022] Open
Abstract
There is strong evidence that overproduction of soluble fms-like tyrosine kinase-1 (sFLT1) in the placenta is a major cause of vascular dysfunction in preeclampsia through sFLT1-dependent antagonism of VEGF. However, the cause of placental sFLT1 upregulation is not known. Here we demonstrated that in women with preeclampsia, sFLT1 is upregulated in placental trophoblasts, while VEGF is upregulated in adjacent maternal decidual cells. In response to VEGF, expression of sFlt1 mRNA, but not full-length Flt1 mRNA, increased in cultured murine trophoblast stem cells. We developed a method for transgene expression specifically in mouse endometrium and found that endometrial-specific VEGF overexpression induced placental sFLT1 production and elevated sFLT1 levels in maternal serum. This led to pregnancy losses, placental vascular defects, and preeclampsia-like symptoms, including hypertension, proteinuria, and glomerular endotheliosis in the mother. Knockdown of placental sFlt1 with a trophoblast-specific transgene caused placental vascular changes that were consistent with excess VEGF activity. Moreover, sFlt1 knockdown in VEGF-overexpressing animals enhanced symptoms produced by VEGF overexpression alone. These findings indicate that sFLT1 plays an essential role in maintaining vascular integrity in the placenta by sequestering excess maternal VEGF and suggest that a local increase in VEGF can trigger placental overexpression of sFLT1, potentially contributing to the development of preeclampsia and other pregnancy complications.
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