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Jia X, Fan X, Chen C, Lu Q, Zhou H, Zhao Y, Wang X, Han S, Ouyang L, Yan H, Dai H, Geng H. Chemical and Structural Engineering of Gelatin-Based Delivery Systems for Therapeutic Applications: A Review. Biomacromolecules 2024; 25:564-589. [PMID: 38174643 DOI: 10.1021/acs.biomac.3c01021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
As a biodegradable and biocompatible protein derived from collagen, gelatin has been extensively exploited as a fundamental component of biological scaffolds and drug delivery systems for precise medicine. The easily engineered gelatin holds great promise in formulating various delivery systems to protect and enhance the efficacy of drugs for improving the safety and effectiveness of numerous pharmaceuticals. The remarkable biocompatibility and adjustable mechanical properties of gelatin permit the construction of active 3D scaffolds to accelerate the regeneration of injured tissues and organs. In this Review, we delve into diverse strategies for fabricating and functionalizing gelatin-based structures, which are applicable to gene and drug delivery as well as tissue engineering. We emphasized the advantages of various gelatin derivatives, including methacryloyl gelatin, polyethylene glycol-modified gelatin, thiolated gelatin, and alendronate-modified gelatin. These derivatives exhibit excellent physicochemical and biological properties, allowing the fabrication of tailor-made structures for biomedical applications. Additionally, we explored the latest developments in the modulation of their physicochemical properties by combining additive materials and manufacturing platforms, outlining the design of multifunctional gelatin-based micro-, nano-, and macrostructures. While discussing the current limitations, we also addressed the challenges that need to be overcome for clinical translation, including high manufacturing costs, limited application scenarios, and potential immunogenicity. This Review provides insight into how the structural and chemical engineering of gelatin can be leveraged to pave the way for significant advancements in biomedical applications and the improvement of patient outcomes.
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Affiliation(s)
- Xiaoyu Jia
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China
| | - Xin Fan
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China
| | - Cheng Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China
| | - Qianyun Lu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China
| | - Hongfeng Zhou
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China
| | - Yanming Zhao
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China
| | - Sanyang Han
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China
| | - Liliang Ouyang
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
| | - Hongji Yan
- Department of Medical Cell Biology (MCB), Uppsala University (UU), 751 05 Uppsala, Sweden
| | - Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China
| | - Hongya Geng
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China
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2
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Garcia-Hernandez A, Reyes-Uribe E, Arce-Salinas C, de la Cruz-Lopez KG, Manzo-Merino J, Guzman-Ortiz AL, Quezada H, Cortes-Reynosa P, Breton-Mora F, Elizalde-Acosta I, Thompson-Bonilla R, Salazar EP. Extracellular vesicles from blood of breast cancer women induce angiogenic processes in HUVECs. Tissue Cell 2022; 76:101814. [DOI: 10.1016/j.tice.2022.101814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 12/24/2022]
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Ribatti D. Two new applications in the study of angiogenesis the CAM assay: Acellular scaffolds and organoids. Microvasc Res 2021; 140:104304. [PMID: 34906560 DOI: 10.1016/j.mvr.2021.104304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/09/2021] [Accepted: 12/09/2021] [Indexed: 02/07/2023]
Abstract
The chick embryo chorioallantoic membrane (CAM) is a rich vascularized extraembryonic membrane that is commonly used as an in vivo experimental model to study molecules with angiogenic and anti-angiogenic activity, tumor growth and metastasis. Among other applications of the CAM assay, more recently this assay has been used for the study of acellular scaffolds and of organoids, and of their angiogenic capacity. The aim of this review article is to summarize the literature data concerning these two new applications of the CAM assay and to underline the advantages of this assay.
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Affiliation(s)
- Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy.
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Preis E, Schulze J, Gutberlet B, Pinnapireddy SR, Jedelská J, Bakowsky U. The chorioallantoic membrane as a bio-barrier model for the evaluation of nanoscale drug delivery systems for tumour therapy. Adv Drug Deliv Rev 2021; 174:317-336. [PMID: 33905805 DOI: 10.1016/j.addr.2021.04.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/29/2021] [Accepted: 04/20/2021] [Indexed: 02/06/2023]
Abstract
In 2010, the European Parliament and the European Union adopted a directive on the protection of animals used for scientific purposes. The directive aims to protect animals in scientific research, with the final goal of complete replacement of procedures on live animals for scientific and educational purposes as soon as it is scientifically viable. Furthermore, the directive announces the implementation of the 3Rs principle: "When choosing methods, the principles of replacement, reduction and refinement should be implemented through a strict hierarchy of the requirement to use alternative methods." The visibility, accessibility, and the rapid growth of the chorioallantoic membrane (CAM) offers a clear advantage for various manipulations and for the simulation of different Bio-Barriers according to the 3R principle. The extensive vascularisation on the CAM provides an excellent substrate for the cultivation of tumour cells or tumour xenografts which could be used for the therapeutic evaluation of nanoscale drug delivery systems. The tumour can be targeted either by topical application, intratumoural injection or i.v. injection. Different application sites and biological barriers can be examined within a single model.
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Affiliation(s)
- Eduard Preis
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Jan Schulze
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Bernd Gutberlet
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; CSL Behring Innovation GmbH, Emil-von-Behring-Str. 76, 35041 Marburg, Germany
| | - Jarmila Jedelská
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; Center for Tumor Biology and Immunology, Core Facility for Small Animal MRI, Hans-Meerwein Str. 3, 35043 Marburg, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany.
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Linoleic acid induces secretion of extracellular vesicles from MDA-MB-231 breast cancer cells that mediate cellular processes involved with angiogenesis in HUVECs. Prostaglandins Other Lipid Mediat 2021; 153:106519. [DOI: 10.1016/j.prostaglandins.2020.106519] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 12/20/2022]
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Schneider-Stock R, Ribatti D. The CAM Assay as an Alternative In Vivo Model for Drug Testing. Handb Exp Pharmacol 2020; 265:303-323. [PMID: 32776283 DOI: 10.1007/164_2020_375] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In the last decade, the chicken chorioallantoic membrane (CAM) assay has been re-discovered in cancer research to study the molecular mechanisms of anti-cancer drug effects. Literature about the CAM assay as an alternative in vivo cancer xenograft model according to the 3R principles has exploded in the last 3 years. Following a summary of the basic knowledge about the chicken embryo, we compare advantages and disadvantages with the classical mouse xenograft model, exemplify established and innovative imaging techniques that are used in the CAM model, and give examples of its successful utilization for studying major hallmarks of cancer such as angiogenesis, proliferation, invasion, and metastasis.
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Affiliation(s)
- Regine Schneider-Stock
- Experimental Tumorpathology, Institute of Pathology, University Hospital, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.
| | - Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy
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Abstract
Myocardial ischemia and peripheral vascular disease persist as significant clinical problems despite improved medical, surgical, and endovascular therapies. Advances in our understanding of the biological mechanisms that govern capillary neovascularization and collateral artery growth have enabled molecular therapies for revascularizing ischemic tissues. Generally known as therapeutic angiogenesis, this review summarizes the essential pre-clinical research and the major clinical trials of molecular therapies for ischemic disease. Early clinical experience has established the proof of principle, however, inconsistent and modest improvements in clinical outcomes have exposed the complexity of neovascularization and problems with transitioning basic science to clinical applicability.
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Affiliation(s)
- Shant M Vartanian
- Division of Vascular Surgery, University of California, San Francisco, California 94143-0104, USA.
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Pruksakorn D, Klangjorhor J, Lirdprapamongkol K, Teeyakasem P, Sungngam P, Chaiyawat P, Phanphaisarn A, Settakorn J, Srisomsap C. Oncogenic roles of serine-threonine kinase receptor-associated protein (STRAP) in osteosarcoma. Cancer Chemother Pharmacol 2018; 82:1039-1047. [PMID: 30276452 DOI: 10.1007/s00280-018-3696-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/25/2018] [Indexed: 12/20/2022]
Abstract
PURPOSE To validate the presence of serine-threonine kinase receptor-associated Protein (STRAP) in osteosarcoma tissue and to investigate the oncological role of STRAP in osteosarcoma. METHODS Expression of STRAP protein in osteosarcoma tissue compared to soft callus (hyperactive bone healing tissue) and in multiple cell lines was examined using western blot analysis. Effects of STRAP silencing on cell proliferation, invasion, migration and re-implantability in chick chorioallantoic membrane (CAM) were observed in osteosarcoma cell lines (MNNG-HOS, 143B, and U2OS). RESULTS The result demonstrated that STRAP was highly up-regulated in osteosarcoma tissues compared with the normal physiological bone healing tissue (soft callus). Expression level of STRAP was markedly high in osteosarcoma cell lines with aggressive phenotype. Upon STRAP silencing, invasion and migration, but not proliferative activity, were selectively modulated in high-expression-STRAP cell lines. In addition, STRAP silencing reduced the success rate of tumor implantation and growth of MNNG-HOS cells in CAM model. CONCLUSIONS Serine-threonine kinase receptor-associated protein is up-regulated during osteosarcoma progression. The presence of STRAP enhances osteosarcoma cell invasion, migration and re-implantation ability, factors which play a critical role in metastasis. Serine-threonine kinase receptor-associated protein and its related pathway are worthy for further exploration as a novel target for anti-metastasis agents.
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Affiliation(s)
- Dumnoensun Pruksakorn
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Biomedical Engineering Institute, Chiang Mai University, Chiang Mai, Thailand
- Osteology Research and Training Center (ORTC), Chiang Mai University, Chiang Mai, Thailand
| | - Jeerawan Klangjorhor
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | | | - Pimpisa Teeyakasem
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Patsadakorn Sungngam
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Parunya Chaiyawat
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Areerak Phanphaisarn
- Orthopedic Laboratory and Research Network (OLARN), Department of Orthopedics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Jongkolnee Settakorn
- Department of Pathology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
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Bao MH, Li GY, Huang XS, Tang L, Dong LP, Li JM. Long Noncoding RNA LINC00657 Acting as a miR-590-3p Sponge to Facilitate Low Concentration Oxidized Low-Density Lipoprotein–Induced Angiogenesis. Mol Pharmacol 2018; 93:368-375. [DOI: 10.1124/mol.117.110650] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 01/29/2018] [Indexed: 12/30/2022] Open
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Moreno-Jiménez I, Kanczler JM, Hulsart-Billstrom G, Inglis S, Oreffo RO. The Chorioallantoic Membrane Assay for Biomaterial Testing in Tissue Engineering: A Short-TermIn VivoPreclinical Model. Tissue Eng Part C Methods 2017; 23:938-952. [DOI: 10.1089/ten.tec.2017.0186] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Inés Moreno-Jiménez
- Bone and Joint Research Group, Faculty of Medicine, Institute of Developmental Sciences, Center for Human Development, Stem Cells and Regeneration, Human Development and Health, University of Southampton, Southampton, United Kingdom
| | - Janos M. Kanczler
- Bone and Joint Research Group, Faculty of Medicine, Institute of Developmental Sciences, Center for Human Development, Stem Cells and Regeneration, Human Development and Health, University of Southampton, Southampton, United Kingdom
| | - Gry Hulsart-Billstrom
- Bone and Joint Research Group, Faculty of Medicine, Institute of Developmental Sciences, Center for Human Development, Stem Cells and Regeneration, Human Development and Health, University of Southampton, Southampton, United Kingdom
| | - Stefanie Inglis
- Bone and Joint Research Group, Faculty of Medicine, Institute of Developmental Sciences, Center for Human Development, Stem Cells and Regeneration, Human Development and Health, University of Southampton, Southampton, United Kingdom
| | - Richard O.C. Oreffo
- Bone and Joint Research Group, Faculty of Medicine, Institute of Developmental Sciences, Center for Human Development, Stem Cells and Regeneration, Human Development and Health, University of Southampton, Southampton, United Kingdom
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11
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Promoting angiogenesis with mesoporous microcarriers through a synergistic action of delivered silicon ion and VEGF. Biomaterials 2016; 116:145-157. [PMID: 27918936 DOI: 10.1016/j.biomaterials.2016.11.053] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 11/26/2016] [Accepted: 11/27/2016] [Indexed: 01/07/2023]
Abstract
Angiogenic capacity of biomaterials is a key asset to drive vascular ingrowth during tissue repair and regeneration. Here we design a unique angiogenic microcarrier based on sol-gel derived mesoporous silica. The microspheres offer a potential angiogenic stimulator, Si ion, 'intrinsically' within the chemical structure. Furthermore, the highly mesoporous nature allows the loading and release of angiogenic growth factor 'extrinsically'. The Si ion is released from the microcarriers at therapeutic ranges (over a few ppm per day), which indeed up-regulates the expression of hypoxia inducing factor 1α (HIF1α) and stabilizes it by blocking HIF-prolyl hydroxylase 2 (PHD2) in HUVECs. This in turn activates the expression of a series of proangiogenic molecules, including bFGF, VEGF, and eNOS. VEGF is incorporated effectively within the mesopores of microcarriers and is then released continuously over a couple of weeks. The Si ion and VEGF released from the microcarriers synergistically stimulate endothelial cell functions, such as cell migration, chemotactic homing, and tubular networking. Furthermore, in vivo neo-blood vessel sprouting in chicken chorioallantoic membrane model is significantly promoted by the Si/VEGF releasing microcarriers. The current study demonstrates the synergized effects of Si ion and angiogenic growth factor through a biocompatible mesoporous microsphere delivery platform, and the concept provided here may open the door to a new co-delivery system of utilizing ions with growth factors for tissue repair and regeneration.
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Harini D, Rajaram A, Rajaram R. Ultrasonic mediated synthesis of monodispersed lanthanum hydroxide nanorods for possible bioimplant application. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:5378. [PMID: 25601669 DOI: 10.1007/s10856-015-5378-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 09/29/2014] [Indexed: 06/04/2023]
Abstract
Monodispersed lanthanum hydroxide nano-rods (LaNRs) were synthesized for prospective biomedical application using a microwave heating and ultrasonic agitation methodology which does not require any toxic stabilizing agent. The average length and diameter of the LaNRs thus obtained were 183.4 ± 3.6 and 9.9 ± 0.2 nm respectively, as analyzed by HRTEM. FTIR spectrum confirmed the presence of OH groups. The thermal transformation of lanthanum hydroxide (La(OH)3) was studied by thermogravimetric analysis. The synthesized LaNRs were found to be stable for a period of 1 month at room temperature. They were biocompatible as evaluated by haemocompatibility assay and viability assay using human peripheral blood mononuclear cells. The pro-angiogenic property of LaNRs was demonstrated by in vivo chick chorioallantoic membrane assay. The LaNRs induced osteoblast differentiation of human adipose derived stem cells with significant calcium (Ca(2+)) deposition indicating potential applications in bone tissue engineering.
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Affiliation(s)
- Dhandapani Harini
- Biochemistry Laboratory, Department of Biochemistry, Central Leather Research Institute, Adyar, Chennai, 600 020, India
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13
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Luo W, Wang X, Zheng L, Zhan Y, Zhang D, Zhang J, Zhang Y. Brucine suppresses colon cancer cells growth via mediating KDR signalling pathway. J Cell Mol Med 2013; 17:1316-24. [PMID: 23905676 PMCID: PMC4159018 DOI: 10.1111/jcmm.12108] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 07/01/2013] [Indexed: 01/30/2023] Open
Abstract
Angiogenesis plays an important role in colon cancer development. This study aimed to demonstrate the effect of brucine on tumour angiogenesis and its mechanism of action. The anti-angiogenic effect was evaluated on the chicken chorioallantoic membrane (CAM) model and tube formation. The mechanism was demonstrated through detecting mRNA and protein expressions of VEGFR2 (KDR), PKCα, PLCγ and Raf1 by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot (WB), as well as expressions of VEGF and PKCβ and mTOR by ELISA and WB. The results showed that brucine significantly reduced angiogenesis of CAM and tube formation, inhibited the VEGF secretion and mTOR expression in LoVo cell and down-regulated the mRNA and phosphorylation protein expressions of KDR, PKCα, PLCγ and Raf1. In addition, the effects of brucine on KDR kinase activity, viability of LoVo cell and gene knockdown cell were detected with the Lance™ assay, WST-1 assay and instantaneous siRNA. Compared to that of normal LoVo cells, the inhibition on proliferation of knockdown cells by brucine decreased significantly. These results suggest that brucine could inhibit angiogenesis and be a useful therapeutic candidate for colon cancer intervention.
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Affiliation(s)
- Wenjuan Luo
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Xiaoli Wang
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Lei Zheng
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Yingzhuan Zhan
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Dongdong Zhang
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Jie Zhang
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
| | - Yanmin Zhang
- School of Medicine, Xi'an Jiaotong UniversityXi'an, Shaanxi Province, China
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Handel M, Hammer TR, Nooeaid P, Boccaccini AR, Hoefer D. 45S5-Bioglass(®)-based 3D-scaffolds seeded with human adipose tissue-derived stem cells induce in vivo vascularization in the CAM angiogenesis assay. Tissue Eng Part A 2013; 19:2703-12. [PMID: 23837884 DOI: 10.1089/ten.tea.2012.0707] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Poor vascularization is the key limitation for long-term acceptance of large three-dimensional (3D) tissue engineering constructs in regenerative medicine. 45S5 Bioglass(®) was investigated given its potential for applications in bone engineering. Since native Bioglass(®) shows insufficient angiogenic properties, we used a collagen coating, to seed human adipose tissue-derived stem cells (hASC) confluently onto 3D 45S5 Bioglass(®)-based scaffolds. To investigate vascularization by semiquantitative analyses, these biofunctionalized scaffolds were then subjected to in vitro human umbilical vein endothelial cells formation assays, and were also investigated in the chorioallantoic membrane (CAM) angiogenesis model, an in vivo angiogenesis assay, which uses the CAM of the hen's egg. In their native, nonbiofunctionalized state, neither Bioglass(®)-based nor biologically inert fibrous polypropylene control scaffolds showed angiogenic properties. However, significant vascularization was induced by hASC-seeded scaffolds (Bioglass(®) and polypropylene) in the CAM angiogenesis assay. Biofunctionalized scaffolds also showed enhanced tube lengths, compared to unmodified scaffolds or constructs seeded with fibroblasts. In case of biologically inert hernia meshes, the quantification of vascular endothelial growth factor secretion as the key angiogenic stimulus strongly correlated to the tube lengths and vessel numbers in all models. This correlation proved the CAM angiogenesis assay to be a suitable semiquantitative tool to characterize angiogenic effects of larger 3D implants. In addition, our results suggest that combinations of suitable scaffold materials, such as 45S5 Bioglass(®), with hASC could be a promising approach for future tissue engineering applications.
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Affiliation(s)
- Marina Handel
- 1 Department of Hygiene, Environment and Medicine, Hohenstein Institutes , Boennigheim, Germany
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15
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Zheng L, He X, Ma W, Dai B, Zhan Y, Zhang Y. Ta1722, an anti-angiogenesis inhibitor targeted on VEGFR-2 against human hepatoma. Biomed Pharmacother 2012; 66:499-505. [DOI: 10.1016/j.biopha.2012.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 05/28/2012] [Indexed: 10/28/2022] Open
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16
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Borcard F, Staedler D, Comas H, Juillerat FK, Sturzenegger PN, Heuberger R, Gonzenbach UT, Juillerat-Jeanneret L, Gerber-Lemaire S. Chemical Functionalization of Bioceramics To Enhance Endothelial Cells Adhesion for Tissue Engineering. J Med Chem 2012; 55:7988-97. [DOI: 10.1021/jm301092r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Françoise Borcard
- Institute of Chemical Sciences and Engineering, EPFL, CH-1015, Lausanne, Switzerland
| | - Davide Staedler
- Institute of Chemical Sciences and Engineering, EPFL, CH-1015, Lausanne, Switzerland
| | - Horacio Comas
- Institute of Chemical Sciences and Engineering, EPFL, CH-1015, Lausanne, Switzerland
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17
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Total Saponin from Root of Actinidia valvata Dunn Inhibits Hepatoma 22 Growth and Metastasis In Vivo by Suppression Angiogenesis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:432814. [PMID: 22956974 PMCID: PMC3432375 DOI: 10.1155/2012/432814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 06/26/2012] [Accepted: 06/27/2012] [Indexed: 12/30/2022]
Abstract
The root of Actinidia valvata dunn has been widely used in the treatment of hepatocellular carcinoma (HCC), proved to be beneficial for a longer and better life in China. In present work, total saponin from root of Actinidia valvata Dunn (TSAVD) was extracted, and its effects on hepatoma H22-based mouse in vivo were observed. Primarily transplanted hypodermal hepatoma H22-based mice were used to observe TSAVD effect on tumor growth. The microvessel density (MVD), vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) are characterized factors of angiogenesis, which were compared between TSAVD-treated and control groups. Antimetastasis effect on experimental pulmonary metastasis hepatoma mice was also observed in the study. The results demonstrated that TSAVD can effectively inhibit HCC growth and metastasis in vivo, inhibit the formation of microvessel, downregulate expressions of VEGF and bFGF, and retrain angiogenesis of hepatoma 22 which could be one of the reasons.
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Zieris A, Chwalek K, Prokoph S, Levental K, Welzel P, Freudenberg U, Werner C. Dual independent delivery of pro-angiogenic growth factors from starPEG-heparin hydrogels. J Control Release 2011; 156:28-36. [DOI: 10.1016/j.jconrel.2011.06.042] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 06/23/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
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19
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Ghanaati S, Unger RE, Webber MJ, Barbeck M, Orth C, Kirkpatrick JA, Booms P, Motta A, Migliaresi C, Sader RA, Kirkpatrick CJ. Scaffold vascularization in vivo driven by primary human osteoblasts in concert with host inflammatory cells. Biomaterials 2011; 32:8150-60. [PMID: 21821280 DOI: 10.1016/j.biomaterials.2011.07.041] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Accepted: 07/13/2011] [Indexed: 10/17/2022]
Abstract
Successful cell-based tissue engineering requires a rapid and thorough vascularization in order to ensure long-term implant survival and tissue integration. The vascularization of a scaffold is a complex process, and is modulated by the presence of transplanted cells, exogenous and endogenous signaling proteins, and the host tissue reaction, among other influencing factors. This paper presents evidence for the significance of pre-seeded osteoblasts for the in vivo vascularization of a biodegradable scaffold. Human osteoblasts, cultured on silk fibroin micronets in vitro, migrated throughout the interconnected pores of the scaffold and produced extensive bone matrix. When these constructs were implanted in SCID mice, a rapid and thorough vascularization of the scaffold by the host blood capillaries occurred. This profound response was not seen for the silk fibroin scaffold alone. Moreover, when the pre-cultivation time of human osteoblasts was reduced from 14 days to only 24 h, the significant effect these cells exerted on vascularization rate in vivo was still detectable. From these studies, we conclude that matrix and soluble factors produced by osteoblasts can serve to instruct host endothelial cells to migrate, proliferate, and initiate the process of scaffold vascularization. This finding represents a potential paradigm shift for the field of tissue engineering, especially in bone, as traditional strategies to enhance scaffold vascularization have focused on endovascular cells and regarded osteoblasts primarily as cell targets for mineralization. In addition, the migration of host macrophages and multinucleated giant cells into the scaffold was also found to influence the vascularization of the biomaterial. Therefore, the robust effect on scaffold vascularization seen by pre-culturing with osteoblasts appears to occur in concert with the pro-angiogenic stimuli arising from host immune cells.
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Affiliation(s)
- Shahram Ghanaati
- REPAIR-Lab, Institute of Pathology, Johannes Gutenberg University, Langenbeckstrasse. 1, 55101 Mainz, Germany.
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Functional histology of glioma vasculature by FTIR imaging. Anal Bioanal Chem 2011; 401:795-801. [PMID: 21556748 DOI: 10.1007/s00216-011-5069-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 03/08/2011] [Accepted: 04/27/2011] [Indexed: 12/31/2022]
Abstract
Fourier-transform infrared (FTIR) imaging has been used to investigate brain tumor angiogenesis using a mice solid tumor model and bare-gold (∅ 25 nm) or BaSO(4) (∅ 500 nm) nanoparticles (NP) injected into blood vasculature. FTIR images of 20-μm-thick tissue sections were used for chemical histology of healthy and tumor areas. Distribution of BaSO(4)-NP (using the 1,218-1,159 cm(-1) spectral interval) revealed clearly all details of blood vasculature with morphological abnormalities of tumor capillaries, while Au-NP (using the 1,046-1,002 cm(-1) spectral interval) revealed also diffusion properties of leaky blood vessels. Diffusion of Au-NP out of vascular space reached 64 ± 29 μm, showing the fenestration of "leaky" tumor blood vessels, which should allow small NP (<100 nm, as for Au-NP) to diffuse almost freely, while large NP should not (as for BaSO(4)-NP in this study). Therefore, we propose to develop FTIR imaging as a convenient tool for functional molecular histology imaging of brain tumor vasculature, both for identifying blood capillaries and for determining the extravascular diffusion space offered by vessel fenestration.
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The Chick Embryo Chorioallantoic Membrane as an In Vivo Assay to Study Antiangiogenesis. Pharmaceuticals (Basel) 2010; 3:482-513. [PMID: 27713265 PMCID: PMC4033966 DOI: 10.3390/ph3030482] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 01/29/2010] [Accepted: 03/02/2010] [Indexed: 12/15/2022] Open
Abstract
Antiangiogenesis, e.g., inhibition of blood vessel growth, is being investigated as a way to prevent the growth of tumors and other angiogenesis-dependent diseases. Pharmacological inhibition interferes with the angiogenic cascade or the immature neovasculature with synthetic or semi-synthetic substances, endogenous inhibitors or biological antagonists.The chick embryo chorioallantoic membrane (CAM) is an extraembryonic membrane, which serves as a gas exchange surface and its function is supported by a dense capillary network. Because its extensive vascularization and easy accessibility, CAM has been used to study morphofunctional aspects of the angiogenesis process in vivo and to study the efficacy and mechanism of action of pro- and anti-angiogenic molecules. The fields of application of CAM in the study of antiangiogenesis, including our personal experience, are illustrated in this review article.
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Fuchs S, Dohle E, Kolbe M, Kirkpatrick CJ. Outgrowth endothelial cells: sources, characteristics and potential applications in tissue engineering and regenerative medicine. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2010; 123:201-17. [PMID: 20182927 DOI: 10.1007/10_2009_65] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Endothelial progenitor cells from peripheral blood or cord blood are attracting increasing interest as a potential cell source for cellular therapies aiming to enhance the neovascularization of tissue engineered constructs or ischemic tissues. The present review focus on a specific population contained in endothelial progenitor cell cultures designated as outgrowth endothelial cells (OEC) or endothelial colony forming cells from peripheral blood or cord blood. Special attention will be paid to what is currently known in terms of the origin and the cell biological or functional characteristics of OEC. Furthermore, we will discuss current concepts, how OEC might be integrated in complex tissue engineered constructs based on biomaterial or co-cultures, with special emphasis on their potential application in bone tissue engineering and related vascularization strategies.
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Affiliation(s)
- Sabine Fuchs
- Institute of Pathology, Universitätsmedizin der Johannes Gutenberg-Universität, Langenbeckstrasse 1, Mainz, Germany,
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Xiong C, Wu H, Wei P, Pan M, Tuo Y, Kusakabe I, Du Y. Potent angiogenic inhibition effects of deacetylated chitohexaose separated from chitooligosaccharides and its mechanism of action in vitro. Carbohydr Res 2009; 344:1975-83. [DOI: 10.1016/j.carres.2009.06.036] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 06/03/2009] [Accepted: 06/18/2009] [Indexed: 11/30/2022]
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Abstract
The prevalence of overweight and obesity is rapidly increasing world wide. Numerous epidemiological studies have shown that obesity is a risk factor for postmenopausal breast cancer and relapse. However, the biological factors that drive the growth and progression of these tumors and how obesity contributes to the tumor microenvironment are poorly understood. Tumor development and metastasis are dependent on the process of angiogenesis or the formation of new blood vessels. More importantly, a ready supply of adipose tissue-derived angiogenic adipokines, notably VEGF and leptin, and the production of inflammatory cytokines by infiltrating macrophages that occurs in adipose tissues with obesity, promotes the paracrine stimulation of vascular endothelial cell growth needed for adipogenesis, while maintaining a microenvironment that is favorable for breast tumorigenesis.
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Affiliation(s)
- Linda Vona-Davis
- Department of Surgery and Breast Cancer Research Program, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, United States.
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Saw CLL, Heng PWS, Liew CV. Chick chorioallantoic membrane as an in situ biological membrane for pharmaceutical formulation development: a review. Drug Dev Ind Pharm 2009; 34:1168-77. [PMID: 18663656 DOI: 10.1080/03639040801974295] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The use of animals in research has always been a debatable issue. Over the past few decades, efforts have been made to reduce, replace, and refine experiments for ethical use of experimental animals. The use of chick chorioallantoic membrane (CAM) was one of the proposed alternatives to the Draize rabbit ocular irritation test with several advantages including simplicity, rapidity, sensitivity, ease of performance, and cost-effectiveness. The recent use of CAM in the development of pharmaceuticals and testing models to mimic human tissue, including drug transport across CAM, will be discussed in this review.
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Stein CA, Wu S, Voskresenskiy AM, Zhou JF, Shin J, Miller P, Souleimanian N, Benimetskaya L. G3139, an anti-Bcl-2 antisense oligomer that binds heparin-binding growth factors and collagen I, alters in vitro endothelial cell growth and tubular morphogenesis. Clin Cancer Res 2009; 15:2797-807. [PMID: 19351753 DOI: 10.1158/1078-0432.ccr-08-2610] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE We examined the effects of G3139 on the interaction of heparin-binding proteins [e.g., fibroblast growth factor 2 (FGF2) and collagen I] with endothelial cells. G3139 is an 18-mer phosphorothioate oligonucleotide targeted to the initiation codon region of the Bcl-2 mRNA. A randomized, prospective global phase III trial in advanced melanoma (GM301) has evaluated G3139 in combination with dacarbazine. However, the mechanism of action of G3139 is incompletely understood because it is unlikely that Bcl-2 silencing is the sole mechanism for chemosensitization in melanoma cells. EXPERIMENTAL DESIGN The ability of G3139 to interact with and protect heparin-binding proteins was quantitated. The effects of G3139 on the binding of FGF2 to high-affinity cell surface receptors and the induction of cellular mitogenesis and tubular morphogenesis in HMEC-1 and human umbilical vascular endothelial cells were determined. RESULTS G3139 binds with picomolar affinity to collagen I. By replacing heparin, the drug can potentiate the binding of FGF2 to FGFR1 IIIc, and it protects FGF from oxidation and proteolysis. G3139 can increase endothelial cell mitogenesis and tubular morphogenesis of HMEC-1 cells in three-dimensional collagen gels, increases the mitogenesis of human umbilical vascular endothelial cells similarly, and induces vessel sprouts in the rat aortic ring model. CONCLUSIONS G3139 dramatically affects the behavior of endothelial cells. There may be a correlation between this observation and the treatment interaction with lactate dehydrogenase observed clinically.
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Affiliation(s)
- C A Stein
- Department of Oncology, Albert Einstein-Montefiore Cancer Center, Montefiore Medical Center, Bronx, New York 10467, USA.
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Puxeddu I, Berkman N, Nissim Ben Efraim AH, Davies DE, Ribatti D, Gleich GJ, Levi-Schaffer F. The role of eosinophil major basic protein in angiogenesis. Allergy 2009; 64:368-74. [PMID: 19120069 DOI: 10.1111/j.1398-9995.2008.01822.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Eosinophil-derived major basic protein (MBP) plays an active role in allergic inflammation and tissue remodelling. However, its role in angiogenesis has not been established as yet. Therefore our objective was to investigate whether MBP exhibits any direct pro-angiogenic effects. METHODS Rat aortic endothelial cells and human umbilical vascular endothelial cells were cultured with different concentrations of MBP and their viability (Trypan blue exclusion test), proliferation (thymidine incorporation) and capillary-like structure formation (matrigel assay) were investigated in vitro. The angiogenic activity of MBP was then tested in vivo using the chick chorio allantoic membrane (CAM) assay. RESULTS Subcytotoxic concentrations of MBP induce endothelial cell proliferation and enhance the pro-mitogenic effect of vascular endothelial growth factor (VEGF), but do not affect their VEGF release. MBP promotes capillarogenesis by endothelial cells seeded on matrigel and sprouting formation in the CAM assay. Furthermore, we have shown that the pro-angiogenic effect of MBP is not due to its cationic charge since stimulation of the CAMs with the synthetic polycation, poly-L-arginine does not induce any angiogenic effects. CONCLUSIONS These data demonstrate that MBP has pro-angiogenic effects in vitro and in vivo, providing a novel mechanism whereby MBP can participate in tissue inflammation and remodelling in atopic diseases.
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Affiliation(s)
- I Puxeddu
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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Hofmann A, Ritz U, Verrier S, Eglin D, Alini M, Fuchs S, Kirkpatrick CJ, Rommens PM. The effect of human osteoblasts on proliferation and neo-vessel formation of human umbilical vein endothelial cells in a long-term 3D co-culture on polyurethane scaffolds. Biomaterials 2008; 29:4217-26. [PMID: 18692894 DOI: 10.1016/j.biomaterials.2008.07.024] [Citation(s) in RCA: 138] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Accepted: 07/15/2008] [Indexed: 10/21/2022]
Abstract
Angiogenesis is a key element in early wound healing and is considered important for tissue regeneration and for directing inflammatory cells to the wound site. The improvement of vascularization by implementation of endothelial cells or angiogenic growth factors may represent a key solution for engineering bone constructs of large size. In this study, we describe a long-term culture environment that supports the survival, proliferation, and in vitro vasculogenesis of human umbilical vein endothelial cells (HUVEC). This condition can be achieved in a co-culture model of HUVEC and primary human osteoblasts (hOB) employing polyurethane scaffolds and platelet-rich plasma in a static microenvironment. We clearly show that hOB support cell proliferation and spontaneous formation of multiple tube-like structures by HUVEC that were positive for the endothelial cell markers CD31 and vWF. In contrast, in a monoculture, most HUVEC neither proliferated nor formed any apparent vessel-like structures. Immunohistochemistry and quantitative PCR analyses of gene expression revealed that cell differentiation of hOB and HUVEC was stable in long-term co-culture. The three-dimensional, FCS-free co-culture system could provide a new basis for the development of complex tissue engineered constructs with a high regeneration and vascularization capacity.
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Affiliation(s)
- Alexander Hofmann
- Department of Trauma Surgery, Johannes Gutenberg University School of Medicine, Langenbeckstrasse 1, D-55101 Mainz, Germany.
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Chen GJ, Weylie B, Hu C, Zhu J, Forough R. FGFR1/PI3K/AKT signaling pathway is a novel target for antiangiogenic effects of the cancer drug fumagillin (TNP-470). J Cell Biochem 2008; 101:1492-504. [PMID: 17295210 DOI: 10.1002/jcb.21265] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Fibroblast growth factor-1 (FGF1), a prototypic member of the FGF family, is a potent angiogenic factor. Although FGF-stimulated angiogenesis has been extensively studied, the molecular mechanisms regulating FGF1-induced angiogenesis are poorly understood in vivo. Fumagillin, an antiangiogenic fungal metabolite, has the ability to inhibit FGF-stimulated angiogenesis in the chicken chorioallantoic membrane (CAM). In the current study, chicken CAMs were transfected with a signal peptide-containing version of the FGF1 gene construct (sp-FGF1). Transfected CAMs were then analyzed in the presence and absence of fumagillin treatment with respect to the mRNA expression levels and protein activity of the FGF1 receptor protein (FGFR1), phosphatidylinositol 3-kinase (PI3K), and its immediate downstream target, AKT-1 (protein kinase B). Treatment of sp-FGF1-transfected CAMs with fumagillin showed downregulation for both PI3K and AKT-1 proteins in mRNA expression and protein activity. In contrast, no major alterations in FGFR1 mRNA expression level were observed. Similar patterns of mRNA expression for the above three proteins were observed when the CAMs were treated with recombinant FGF1 protein in place of sp-FGF1 gene transfection. Investigation using biotin-labeled fumagillin showed that only the FGF1 receptor protein containing the cytoplasmic domain demonstrated binding to fumagillin. Furthermore, we demonstrated endothelial-specificity of the proposed antiangiogenic signaling cascade using an in vitro system. Based on these findings, we conclude that the binding of fumagillin to the cytoplasmic domain of the FGF1 receptor inhibited FGF1-stimulated angiogenesis both in vitro and in vivo.
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Affiliation(s)
- Gregory J Chen
- Department of Systems Biology and Translational Medicine, College of Medicine, The Texas A&M University System Health Science Center, College Station, Texas 77843, USA
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Zhang Y, He L, Meng L, Luo W, Xu X. Suppression of tumor-induced angiogenesis by taspine isolated from Radix et Rhizoma Leonticis and its mechanism of action in vitro. Cancer Lett 2008; 262:103-13. [DOI: 10.1016/j.canlet.2007.11.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Revised: 08/30/2007] [Accepted: 11/26/2007] [Indexed: 01/31/2023]
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Zhang Y, He L, Zhou Y. Taspine isolated from Radix et Rhizoma Leonticis inhibits growth of human umbilical vein endothelial cell (HUVEC) by inducing its apoptosis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2008; 15:112-119. [PMID: 17976967 DOI: 10.1016/j.phymed.2007.09.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Revised: 07/30/2007] [Accepted: 09/10/2007] [Indexed: 05/25/2023]
Abstract
The present study was to evaluate the effects of taspine isolated from Radix et Rhizoma Leonticsi on the growth and apoptosis of human umbilical vein endothelial cell (HUVEC) line by MTT and flow cytometer, respectively. At the same time, a series of changes were observed in HUVEC treated by taspine, including microstructure, protein expression of bax, bcl-2 and VEGF. The change of microstructure was observed by transmission electron microscope (TEM). The protein expression of bax and bcl-2 was detected by immunohistochemistry (IHC), and VEGF protein secreted was determined by enzyme-linked immunosorbent assay (ELISA). The results showed taspine could inhibit growth and induce apoptosis of HUVEC in a dose-dependent manner. Cell cycle was significantly stopped at the S phase. Under electronic microscope, the morphology of HUVEC treated with taspine showed nuclear karyopycnosis, chromatin agglutination and typical apoptotic body. Bcl-2 and VEGF expressions were decreased and bax expression was increased. All these results demonstrate that taspine has an inhibitory effect on growth of HUVEC and can induce its apoptosis.
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Affiliation(s)
- Yanmin Zhang
- School of Medicine, Xi'an Jiaotong University, No. 76, Yanta Weststreet, #120, Xi'an, Shaanxi Province 710061, PR China
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Ribatti D. Chapter 5 Chick Embryo Chorioallantoic Membrane as a Useful Tool to Study Angiogenesis. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2008; 270:181-224. [DOI: 10.1016/s1937-6448(08)01405-6] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Fuchs S, Hofmann A, Kirkpatrick CJ. Microvessel-Like Structures from Outgrowth Endothelial Cells from Human Peripheral Blood in 2-Dimensional and 3-Dimensional Co-Cultures with Osteoblastic Lineage Cells. ACTA ACUST UNITED AC 2007; 13:2577-88. [PMID: 17655487 DOI: 10.1089/ten.2007.0022] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Tissue regeneration involves complex processes in the interaction between different cell types that control the process of neo-vascularization. In bone, osteoblasts and bone marrow stem cells provide cue elements for the proliferation of endothelial cells, differentiation of endothelial precursors, and the maturation of a vascular network. In this study, we investigated outgrowth endothelial cells (OECs), a potential source of autologous endothelial cells derived from human peripheral blood, in direct 2-dimensional (2-D) and 3-D co-culture systems with cells relevant for the regeneration of bone tissue, such as osteoblasts. In the co-cultures, OECs were evaluated in terms of their stability as an endothelial population at the single cell level using flow cytometry and their ability to establish a pre-vascular network at the light-microscopical and ultra-structural level. In co-cultures with the osteoblast cell line MG63 and with human primary osteoblasts (pOBs), OECs, in contrast to human umbilical vein endothelial cells, formed highly organized microvessel-like structures. These microvessel-like structures included the formation of a vascular lumen with tight junctional complexes at intercellular contacts of endothelial cells. In the co-culture, the formation of this vascular network was achieved in the standard growth medium for OECs. Furthermore, using a rotating culture vessel system, 3-D co-cultures consisting of OECs and pOBs were generated. Based on these observations, we conclude that OECs could provide a valuable source of autologous endothelial cells for the generation of complex tissue-engineered tissues.
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Affiliation(s)
- Sabine Fuchs
- Institute of Pathology, Johannes Gutenberg University, Mainz, Germany
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van den Beucken JJJP, Walboomers XF, Nillesen STM, Vos MRJ, Sommerdijk NAJM, van Kuppevelt TH, Nolte RJM, Jansen JA. In vitro and in vivo effects of deoxyribonucleic acid-based coatings funtionalized with vascular endothelial growth factor. ACTA ACUST UNITED AC 2007; 13:711-20. [PMID: 17373893 DOI: 10.1089/ten.2006.0303] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Vascularization is important in wound healing and essential for tissue ingrowth into porous tissue-engineering matrices. Furthermore, peri-implant tissue vascularization is known to be important for the functionality of subcutaneously implanted biosensors (e.g., glucose sensors). As a first exploration of the use of deoxyribonucleic acid (DNA)-based coatings for the optimization of biosensor functionality, this study focused on the effect of DNA-based coatings functionalized with vascular endothelial growth factor (VEGF) on in vitro endothelial cell behavior and vascularization of the peri-implant tissue in vivo. To that end, DNA-based coatings consisting of poly-D-lysine and DNA were functionalized with different amounts of VEGF (25 and 250 ng) and compared to non-coated controls and non-functionalized DNA-based coatings. The results demonstrated the superiority of VEGF-functionalized DNA-based coatings in increasing endothelial cell proliferation and migration in vitro over non-coated controls and non-functionalized DNA-based coatings. In vivo, a significant increase in vascularization of the peri-implant area was observed for VEGF-functionalized DNA-based coatings. Because no dosage-dependent effects were observed, future experiments should focus on optimizing VEGF concentration for this purpose. Additionally, the administration of VEGF in combination with other (pro-angiogenic) factors should be considered.
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Affiliation(s)
- Jeroen J J P van den Beucken
- Department of Periodontology and Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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Makanya AN, Hlushchuk R, Baum O, Velinov N, Ochs M, Djonov V. Microvascular endowment in the developing chicken embryo lung. Am J Physiol Lung Cell Mol Physiol 2007; 292:L1136-46. [PMID: 17244646 DOI: 10.1152/ajplung.00371.2006] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
In the current study, the contribution of the major angiogenic mechanisms, sprouting and intussusception, to vascular development in the avian lung has been demonstrated. Sprouting guides the emerging vessels to form the primordial vascular plexus, which successively surrounds and encloses the parabronchi. Intussusceptive angiogenesis has an upsurge from embryonic day 15 (E15) and contributes to the remarkably rapid expansion of the capillary plexus. Increased blood flow stimulates formation of pillars (the archetype of intussusception) in rows, their subsequent fusion and concomitant delineation of slender, solitary vascular entities from the disorganized meshwork, thus crafting the organ-specific angioarchitecture. Morphometric investigations revealed that sprouting is preponderant in the early period of development with a peak at E15 but is subsequently supplanted by intussusceptive angiogenesis by the time of hatching. Quantitative RT-PCR revealed that moderate levels of basic FGF (bFGF) and VEGF-A were maintained during the sprouting phase while PDGF-B remained minimal. All three factors were elevated during the intussusceptive phase. Immunohistoreactivity for VEGF was mainly in the epithelial cells, whereas bFGF was confined to the stromal compartment. Temporospatial interplay between sprouting and intussusceptive angiogenesis fabricates a unique vascular angioarchitecture that contributes to the establishment of a highly efficient gas exchange system characteristic of the avian lung.
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Affiliation(s)
- A N Makanya
- Department of Veterinary Anatomy and Physiology, University of Nairobi, Nairobi, Kenya
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Lombardero M, Quintanar-Stephano A, Vidal S, Horvath E, Kovacs K, Lloyd RV, Scheithauer BW. Vascularization of rat pituitary autografts. J Anat 2006; 208:587-93. [PMID: 16637881 PMCID: PMC2100219 DOI: 10.1111/j.1469-7580.2006.00571.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Pituitary autotransplantation eliminates direct vascular contact between the hypothalamus and the adenohypophysis, and enables us to study the role of the hypothalamus in regulating adenohypophysial endocrine activity. The aim of this study was to investigate vascularization of the pituitary autografts. Three-month-old male Wistar rats were hypophysectomized, and their adenohypophyses were autotransplanted under the renal capsule. The animals were killed 3 weeks after autotransplantation. The grafts were removed and studied by using histology, immunohistochemistry and transmission electron microscopy. In the central portion of the grafts, organizing necrosis was apparent. The peripheral portion of the graft contained all adenohypophysial cell types, with a predominance of lactotrophs. Vascular endothelial growth factor and hypoxia-inducible factor were expressed in the graft mainly in the perinecrotic areas. Several capillaries inside the grafts were lined by continuous unfenestrated epithelium, while others were lined by fenestrated endothelium, suggesting that neovascularization is the result of two processes: ingrowths of capillaries from the renal capsule to the graft, and neoformation of capillaries from pre-existing adenohypophysial vessels. In conclusion, hypoxia seems to be an important factor in the vascularization of pituitary autografts. Mediated via hypoxia-inducible factor, hypoxia stimulates vascular endothelial growth factor secretion, which plays a crucial role in angiogenesis.
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Affiliation(s)
- Matilde Lombardero
- Department of Anatomy and A.P., Faculty of Veterinary Sciences, University of Santiago de Compostela, Lugo, Spain.
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Abstract
Here we present a method for the quantification of angiogenesis and antiangiogenesis in the chick embryo chorioallantoic membrane (CAM) based on the implantation of a gelatin sponge on the top of the growing CAM on day 8 of development. After implantation, the sponge is treated with a stimulator of blood vessel formation in the absence or presence of an angiogenesis inhibitor. On day 12, blood vessels that are growing into the sponge are counted at macroscopic and microscopic levels. The estimated timeline for carrying out this protocol is 10 d. The presence of a vascular network in the CAM requires a careful analysis to distinguish new capillaries from pre-existing ones. This limitation does not occur in the avascular cornea assay, which may also take advantage of different genetic backgrounds when carried out in transgenic or knockout mice. Nevertheless, the gelatin sponge-CAM assay is simple, inexpensive and suitable for large-scale screening.
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Affiliation(s)
- Domenico Ribatti
- Department of Human Anatomy and Histology, University of Bari Medical School, Piazza Giulio Cesare 11, Policlinico, 70124 Bari, Italy.
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Maharaj ASR, Saint-Geniez M, Maldonado AE, D'Amore PA. Vascular endothelial growth factor localization in the adult. THE AMERICAN JOURNAL OF PATHOLOGY 2006; 168:639-48. [PMID: 16436677 PMCID: PMC1606504 DOI: 10.2353/ajpath.2006.050834] [Citation(s) in RCA: 219] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Although vascular endothelial growth factor (VEGF) has been well studied in both developmental and pathological angiogenesis, its role in mature blood vessels is poorly understood. A growing body of observations, including the side effects of anti-VEGF therapies as well as the role of soluble VEGFR1 in preeclampsia, points to an important role for VEGF in maintenance of stable blood vessels. To better understand the potential function of VEGF in mature vessels, a survey of VEGF localization in adult mice was conducted. In adult VEGF-lacZ mice, VEGF was expressed in a cell-specific manner by cells overlying fenestrated and sinusoidal blood vessels, including podocytes, choroid plexus epithelium, and hepatocytes, as well as in tissues with high metabolic demands or with secretory functions, such as cardiac and skeletal myocytes, Leydig cells, prostatic epithelium, and salivary serous epithelium. VEGF was not detected in most endothelium but was specifically expressed by aortic endothelial cells where VEGFR2 was found to be phosphorylated, indicating an autocrine loop. Additionally, VEGFR2 was constitutively phosphorylated in the liver, lung, adipose, and kidney in vivo, providing evidence consistent with a role for VEGF in adult tissues. These observations support the concept that VEGF acts in the adult to stabilize mature vessels.
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Weylie B, Zhu J, Singh U, Ambrus S, Forough R. Phosphatidylinositide 3-Kinase Is Important in Late-Stage Fibroblast Growth Factor-1-Mediated Angiogenesis in vivo. J Vasc Res 2005; 43:61-9. [PMID: 16272825 DOI: 10.1159/000089492] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2004] [Accepted: 06/25/2005] [Indexed: 11/19/2022] Open
Abstract
We previously reported that overexpression of a secreted version of fibroblast growth factor-1 (sp-FGF-1) has the ability to induce angiogenesis in the chicken chorioallantoic membrane (CAM). In our current study, we examine the effects of sp-FGF-1 through a time course analysis of angiogenesis in the chicken CAM on days 3, 4, and 5 after gene transfection. Significant angiogenesis was observed on days 4 and 5 after gene transfection in the CAM assay. To evaluate the role of phosphatidylinositide 3-kinase (PI3K) signaling in sp-FGF-1-induced angiogenesis, we analyzed mRNA expression levels of PI3K and protein activity through its immediate downstream target, AKT-1. We found upregulation of both PI3K and AKT mRNA expression levels in day 5 sp-FGF-1 versus day 5 vector control-transfected CAMs. Furthermore, by blocking PI3K phosphorylation using the specific inhibitor, LY294002, we found that downstream phosphorylation of AKT-1 was inhibited. More importantly, the blockade of the PI3K pathway via LY294002 in sp-FGF-1-transfected CAMs significantly inhibited angiogenesis. These results further elucidate the molecular mechanisms of the sp-FGF-1 signaling pathway and it underscores the importance of PI3K signaling in FGF-1-stimulated angiogenesis in vivo. It also provides a basis for the role of sp-FGF-1 in the development of therapeutic treatments to combat vascular insufficiencies and angiogenesis-dependent cancers.
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Affiliation(s)
- Brian Weylie
- Department of Medical Physiology and Cardiovascular Research Institute, Texas A&M University System Health Science Center, College of Medicine, Temple, TX, USA
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Makanya AN, Stauffer D, Ribatti D, Burri PH, Djonov V. Microvascular growth, development, and remodeling in the embryonic avian kidney: the interplay between sprouting and intussusceptive angiogenic mechanisms. Microsc Res Tech 2005; 66:275-88. [PMID: 16003781 DOI: 10.1002/jemt.20169] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Embryonic development is associated with extensive vascular growth and remodeling. We used immunohistochemical, light and electron microscopical techniques, as well as vascular casting methods to study the developing chick embryo kidney with special attention to the interplay between sprouting and intussusceptive vascular growth modes. During inauguration at embryonic day 5 (E5), the early mesonephros was characterised by extensive microvascular sprouting. By E7, the vascular growth mode switched to intussusception, which contributed to rapid kidney vasculature growth up to E11, when the first obvious signs of vascular degeneration were evident. The metanephros underwent similar phases of vascular development inaugurating at E8 with numerous capillary sprouts and changing at E13 to intussusceptive growth, which was responsible for vascular amplification and remodeling. A phenomenal finding was that future renal lobules arose as large glomerular tufts, supplied by large vessels, which were split into smaller intralobular feeding and draining vessels with subsequent formation of solitary glomeruli. This glomerular duplication was achieved by intussusception, i.e., by formation of pillars in rows and their successive merging to delineate the vascular entities. Ultimately, the maturation of the vasculature was achieved by intussusceptive pruning and branching remodeling. An interesting finding was that strong VEGF expression was associated with the sprouting phase of angiogenesis while bFGF was upregulated during the phase of intussusceptive microvascular growth. We conclude that microvascular growth and remodeling in avian kidney follows an adroitly crafted pattern, which entails a precise spaciotemporal interplay between sprouting and intussusceptive angiogenic growth modes supported partly by VEGF and bFGF.
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Affiliation(s)
- Andrew N Makanya
- Institute of Anatomy, University of Berne, CH-3000 Berne 9, Switzerland
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41
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Manenti L, Riccardi E, Marchini S, Naumova E, Floriani I, Garofalo A, Dossi R, Marrazzo E, Ribatti D, Scanziani E, Bani M, Belotti D, Broggini M, Giavazzi R. Circulating plasma vascular endothelial growth factor in mice bearing human ovarian carcinoma xenograft correlates with tumor progression and response to therapy. Mol Cancer Ther 2005; 4:715-25. [PMID: 15897235 DOI: 10.1158/1535-7163.mct-04-0305] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vascular endothelial growth factor (VEGF) performs as an angiogenic and permeability factor in ovarian cancer, and its overexpression has been associated with poor prognosis. However, models to study its role as a marker of tumor progression are lacking. We generated xenograft variants derived from the A2780 human ovarian carcinoma (1A9), stably transfected with VEGF(121) in sense (1A9-VS-1) and antisense orientation (1A9-VAS-3). 1A9, 1A9-VS-1, and 1A9-VAS-3 disseminated in the peritoneal cavity of nude mice, but only 1A9-VS-1, the VEGF(121)-overexpressing tumor variant, produced ascites. Tumor biopsies from 1A9-VS-1 showed alterations in the vascular pattern and caused an angiogenic response in the chorioallantoic membrane assay. A significant level of soluble VEGF was detectable in the plasma of mice bearing 1A9-VS-1 even at an early stage of tumor growth. Plasma VEGF correlated positively with tumor burden in the peritoneal cavity and ascites accumulation. Cisplatin reduced the tumor burden and ascites in mice bearing 1A9-VS-1; the response was associated with a significant decrease of VEGF in plasma. This 1A9-VS-1 xenograft model reproduces the behavior of human ovarian cancer by growing in the peritoneal cavity, being highly malignant, and producing ascites. Plasma VEGF as a marker of tumor progression offers a valuable means of detecting early tumor response and following up treatments in an animal model.
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Affiliation(s)
- Luigi Manenti
- Laboratory of Biology and Therapy of Metastasis, Mario Negri Institute for Pharmacological Research, via Gavazzeni 11, 24125 Bergamo, Italy
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42
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Presta M, Dell'Era P, Mitola S, Moroni E, Ronca R, Rusnati M. Fibroblast growth factor/fibroblast growth factor receptor system in angiogenesis. Cytokine Growth Factor Rev 2005; 16:159-78. [PMID: 15863032 DOI: 10.1016/j.cytogfr.2005.01.004] [Citation(s) in RCA: 931] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fibroblast growth factors (FGFs) are a family of heparin-binding growth factors. FGFs exert their pro-angiogenic activity by interacting with various endothelial cell surface receptors, including tyrosine kinase receptors, heparan-sulfate proteoglycans, and integrins. Their activity is modulated by a variety of free and extracellular matrix-associated molecules. Also, the cross-talk among FGFs, vascular endothelial growth factors (VEGFs), and inflammatory cytokines/chemokines may play a role in the modulation of blood vessel growth in different pathological conditions, including cancer. Indeed, several experimental evidences point to a role for FGFs in tumor growth and angiogenesis. This review will focus on the relevance of the FGF/FGF receptor system in adult angiogenesis and its contribution to tumor vascularization.
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Affiliation(s)
- Marco Presta
- Unit of General Pathology and Immunology, Department of Biomedical Sciences and Biotechnology, School of Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy.
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Errico M, Riccioni T, Iyer S, Pisano C, Acharya KR, Persico MG, De Falco S. Identification of Placenta Growth Factor Determinants for Binding and Activation of Flt-1 Receptor. J Biol Chem 2004; 279:43929-39. [PMID: 15272021 DOI: 10.1074/jbc.m401418200] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Placenta growth factor (PlGF) belongs to the vascular endothelial growth factor (VEGF) family and represents a key regulator of angiogenic events in pathological conditions. PlGF exerts its biological function through the binding and activation of the seven immunoglobulin-like domain receptor Flt-1, also known as VEGFR-1. Here, we report the first detailed mutagenesis studies that provide a basis for understanding molecular recognition between PlGF-1 and Flt-1, highlighting some of the residues that are critical for receptor recognition. Mutagenesis analysis, performed on the basis of a structural model of interaction between PlGF and the minimal binding domain of Flt-1, has led to the identification of several PlGF-1 residues involved in Flt-1 recognition. The two negatively charged residues, Asp-72 and Glu-73, located in the beta3-beta4 loop, are critical for Flt-1 binding. Other mutations, which bring about a significant decrease in PlGF binding activity, are Gln-27, located in the N-terminal alpha-helix, and Pro-98 and Tyr-100 on the beta6 strand. The mutation of one of the two glycosylated residues of PlGF, Asn-84, generates a PlGF variant with reduced binding activity. This indicates that, unlike in VEGF, glycosylation plays an important role in Flt-1 binding. The double mutation of residues Asp-72 and Glu-73 generates a PlGF variant unable to bind and activate the receptor molecules on the cell surface. This variant failed to induce in vitro capillary-like tube formation of primary endothelial cells or neo-angiogenesis in an in vivo chorioallantoic membrane assay.
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Affiliation(s)
- Michela Errico
- Institute of Genetics and Biophysics Adriano Buzzati-Traverso, Consiglio Nazionale delle Ricerche, 80131 Naples, Italy
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Nico B, Mangieri D, Corsi P, De Giorgis M, Vacca A, Roncali L, Ribatti D. Vascular endothelial growth factor-A, vascular endothelial growth factor receptor-2 and angiopoietin-2 expression in the mouse choroid plexuses. Brain Res 2004; 1013:256-9. [PMID: 15193536 DOI: 10.1016/j.brainres.2004.04.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2004] [Indexed: 11/26/2022]
Abstract
In this study, for the first time, we investigated about the localization of VEGF-A, VEGFR-2 and Ang-2 in the choroid plexuses of the adult mouse by Western blot and immunohistochemistry. Results showed that VEGF-A stained epithelial cells, while anti-VEGFR-2 and -Ang-2 antibodies stained endothelial cells. These data suggest that Ang-2, converting blood vessels into a more plastic and immature phenotype, would provide more accessibility of VEGF-A to endothelial cells.
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Affiliation(s)
- Beatrice Nico
- Department of Human Anatomy and Histology, University of Bari Medical School, Piazza Giulio Cesare, 11, Policlinico, I-70124, Bari, Italy
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Ribatti D, De Falco G, Nico B, Ria R, Crivellato E, Vacca A. In vivo time-course of the angiogenic response induced by multiple myeloma plasma cells in the chick embryo chorioallantoic membrane. J Anat 2003; 203:323-8. [PMID: 14529049 PMCID: PMC1571164 DOI: 10.1046/j.1469-7580.2003.00220.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
In this study, we set out to make a fine characterization of the angiogenic response induced by plasma cells obtained from patients with active-multiple myeloma (MM), in comparison with cells obtained from patients with non-active MM and benign lesions such as monoclonal gammopathy of undetermined significance (MGUS), in the chick embryo chorioallantoic membrane (CAM) assay. To achieve this we investigated the time-course of the angiogenic response induced by gelatin sponges soaked in the cell suspensions and implanted on the CAM surface from day 8 to day 12 of incubation by evaluating the number of vessels, of the vessel bifurcation and the intervascular distance at 24, 48, 72 and 96 h after the implants. The results show that plasma cell suspensions obtained from patients with active MM induce a vasoproliferative response that was significantly higher than that induced by cell suspensions obtained from patients with non-active MM or with MGUS, which is also a function of the day of implantation. In fact, implants made from day 8 to day 10 induce a strong angiogenic response, whereas those made from day 11 to day 12 do not. This finding might depend on the fact that CAM endothelium exhibits an intrinsically high mitotic rate until day 10. Thereafter, the endothelial mitotic index declines rapidly, and consequently cell suspensions implanted on the CAM of successively older embryos are not able to induce a vasoproliferative response in parallel with the reduced rates of growth of the CAM's endothelial cells.
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Affiliation(s)
- Domenico Ribatti
- Department of Human Anatomy and Histology, University of Bari Medical School, Bari, Italy.
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46
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Crivellato E, Nico B, Vacca A, Djonov V, Presta M, Ribatti D. Recombinant human erythropoietin induces intussusceptive microvascular growth in vivo. Leukemia 2003; 18:331-6. [PMID: 14671634 DOI: 10.1038/sj.leu.2403246] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The role of erythropoietin (Epo) in angiogenesis has not been completely clarified. Epo induces endothelial cell proliferation and migration and stimulates angiogenesis on rat aortic rings in vitro and in vivo in the chick embryo chorioallantoic membrane (CAM) assay. The aim of the present study was to evaluate the ultrastructural aspects of angiogenesis in the CAM vasculature after recombinant human Epo (rHuEpo) exposure. The results demonstrated that after rHuEpo stimulation, the generation of new blood vessels occurred more frequently following an intussusceptive microvascular growth (IMG) mechanism. We have performed our experiments between days 8 and 12 of incubation, that is, when in the normal condition the capillary network expands mainly by IMG, and because it is generally accepted that implants made from days 8 to 10 are strongly angiogenic. This response is peculiar of rHuEpo, because it is abolished when an Epo-blocking antibody was coadministered with Epo.
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Affiliation(s)
- E Crivellato
- Department of Medical and Morphological Researches, Anatomy Section, University of Udine Medical School, Udine, Italy
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Sanders JE, Wang YN, Malcolm SG, Lamont SE. Biomaterial Mesh Seeded with Vascular Remnants from a Quail Embryo Has a Significant and Fast Vascular Templating Effect on Host Implant Tissue. ACTA ACUST UNITED AC 2003; 9:1271-9. [PMID: 14670115 DOI: 10.1089/10763270360728189] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Seeding biomaterial implants with vascular remnants has the potential to facilitate host vessel ingrowth via a vascular templating effect. Vessels from quail embryo were grown into a polyurethane fibroporous mesh and the samples were frozen-thawed and then implanted in rat subcutaneous dorsum. Results show that the process of revascularization, using the quail vessel remnants, occurred over the first 3 days after implantation and resulted in functional vessels. Rat endothelial cells were found in the quail templates on day 1. On day 2 the endothelial cells formed a confluent layer and started producing laminin. By this time approximately 70% of the rat vessel tissue in the implant had grown into quail vascular remnants, indicating that the quail vessels were extensively used as templates for host vessel ingrowth. Laminin production was increased and collagen production started by day 3, at which time the vessels were functional in that rat blood flowed through them. At 2 weeks host vessel density was approximately twice that of control samples; thus the implant substantially enhanced the size of the vascular network. For meshes that additionally received vascular endothelial growth factor (VEGF) seeding before implantation, vessel density at 2 weeks was enhanced over samples with quail embryo alone. However, the quail was found to have the greatest angiogenic effect above any of the implant components-quail, VEGF, and collagen. Tissue engineering of vessel templates may thus be a realistic solution to effective fast vascularization of biomaterials.
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Affiliation(s)
- J E Sanders
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA.
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Ribatti D, Conconi MT, Nico B, Baiguera S, Corsi P, Parnigotto PP, Nussdorfer GG. Angiogenic response induced by acellular brain scaffolds grafted onto the chick embryo chorioallantoic membrane. Brain Res 2003; 989:9-15. [PMID: 14519506 DOI: 10.1016/s0006-8993(03)03225-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The repair and regeneration of injured tissues and organs depend on the re-establishment of the blood flow needed for cellular infiltration and metabolic support. Among the various materials used in tissue reconstruction, acellular scaffolds have recently been utilized. In this study, we investigated the angiogenic response induced by acellular brain scaffolds implanted in vivo onto the chick embryo chorioallantoic membrane (CAM), a useful model for such investigations. The results show that acellular brain scaffolds are able to induce a strong angiogenic response, comparable to that of fibroblast growth factor-2 (FGF-2), a well known angiogenic cytokine. The response may be considered dependent on a direct angiogenic effect exerted by the scaffold, because no inflammatory infiltrate was detectable in CAM's mesenchyme beneath the implant. Acellular brain scaffolds might induce the release of endogenous angiogenic factors, such as FGF-2 and vascular endothelial growth factor (VEGF) released from the extracellular matrix of the developing CAM. In addition, the angiogenic response may depend, in part, also on the presence in the acellular matrix of transforming growth factor beta 1 (TGFbeta1).
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Affiliation(s)
- Domenico Ribatti
- Department of Human Anatomy and Histology, University of Bari Medical School, Policlinico, Piazza Giulio Cesare 11, I-70124, Bari, Italy.
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Leali D, Dell'Era P, Stabile H, Sennino B, Chambers AF, Naldini A, Sozzani S, Nico B, Ribatti D, Presta M. Osteopontin (Eta-1) and fibroblast growth factor-2 cross-talk in angiogenesis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2003; 171:1085-93. [PMID: 12847283 DOI: 10.4049/jimmunol.171.2.1085] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The cytokine/extracellular matrix protein osteopontin (OPN/Eta-1) is an important component of cellular immunity and inflammation. It also acts as a survival, cell-adhesive, and chemotactic factor for endothelial cells. Here, subtractive suppression hybridization showed that serum-deprived murine aortic endothelial (MAE) cells transfected with the angiogenic fibroblast growth factor-2 (FGF2) overexpress OPN compared with parental cells. This was confirmed by Northern blotting and Western blot analysis of the conditioned media in different clones of endothelial cells overexpressing FGF2 and in endothelial cells treated with the recombinant growth factor. In vivo, FGF2 caused OPN expression in newly formed endothelium of the chick embryo chorioallantoic membrane (CAM) and of murine s.c. Matrigel plug implants. Recombinant OPN (rOPN), the fusion protein GST-OPN, and the deletion mutant GST-DeltaRGD-OPN were angiogenic in the CAM assay. Angiogenesis was also triggered by OPN-transfected MAE cells grafted onto the CAM. OPN-driven neovascularization was independent from endothelial alpha(v)beta(3) integrin engagement and was always paralleled by the appearance of a massive mononuclear cell infiltrate. Accordingly, rOPN, GST-OPN, GST-DeltaRGD-OPN, and the conditioned medium of OPN-overexpressing MAE cells were chemotactic for isolated human monocytes. Also, rOPN triggered a proangiogenic phenotype in human monocytes by inducing the expression of the angiogenic cytokines TNF-alpha and IL-8. OPN-mediated recruitment of proangiogenic monocytes may represent a mechanism of amplification of FGF2-induced neovascularization during inflammation, wound healing, and tumor growth.
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Affiliation(s)
- Daria Leali
- Unit of General Pathology and Immunology, Department of Biomedical Sciences and Biotechnology, University of Brescia, Brescia, Italy
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Nico B, de Falco G, Vacca A, Roncali L, Ribatti D. In vivo absence of synergism between fibroblast growth factor-2 and vascular endothelial growth factor. JOURNAL OF HEMATOTHERAPY & STEM CELL RESEARCH 2001; 10:905-12. [PMID: 11798517 DOI: 10.1089/152581601317211006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Fibroblast growth factor-2 (FGF-2) and vascular endothelial growth factor (VEGF) are potent angiogenesis inducers in vivo and in vitro and may act in synergy. This possibility has been investigated by their simultaneous administration in the chick embryo chorioallantoic membrane (CAM) assay. Macroscopic and microscopic quantification of the angiogenic response 4 days after administration clearly demonstrated the absence of synergism. When FGF-2 or VEGF concentration was fixed at 0.25 microg/embryo, the simultaneous addition of increasing concentration (0.25, 0.50, 1.0 microg/embryo) of VEGF or FGF-2 did not stimulate a synergistic dose-dependent angiogenic response. In both conditions, the angiogenic response overlapped that induced by the two growth factors administered alone. It is suggested that exogenous administration of FGF-2 and VEGF in the CAM assay may induce an activation of endogenous angiogenic factors, such as FGF-2, and endogenous inhibitors of angiogenesis, such as nitric oxide, normally expressed in the CAM during the development of its vascular tree. Thus, in an in vivo system, evaluation of synergistic action between two cytokines and discrimination of their specific activity are more difficult than in an in vitro assay.
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Affiliation(s)
- B Nico
- Department of Human Anatomy and Histology, University of Bari Medical School, Bari, Italy
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