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Miyamura Y, Kamei S, Matsuo M, Yamazaki M, Usuki S, Yasunaga K, Uemura A, Satou Y, Ohguchi H, Minami T. FOXO1 stimulates tip cell-enriched gene expression in endothelial cells. iScience 2024; 27:109161. [PMID: 38444610 PMCID: PMC10914484 DOI: 10.1016/j.isci.2024.109161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 11/29/2023] [Accepted: 02/05/2024] [Indexed: 03/07/2024] Open
Abstract
Forkhead box O (FOXO) family proteins are expressed in various cells, and play crucial roles in cellular metabolism, apoptosis, and aging. FOXO1-null mice exhibit embryonic lethality due to impaired endothelial cell (EC) maturation and vascular remodeling. However, FOXO1-mediated genome-wide regulation in ECs remains unclear. Here, we demonstrate that VEGF dynamically regulates FOXO1 cytosol-nucleus translocation. FOXO1 re-localizes to the nucleus via PP2A phosphatase. RNA-seq combined with FOXO1 overexpression/knockdown in ECs demonstrated that FOXO1 governs the VEGF-responsive tip cell-enriched genes, and further inhibits DLL4-NOTCH signaling. Endogenous FOXO1 ChIP-seq revealed that FOXO1 binds to the EC-unique tip-enriched genes with co-enrichment of EC master regulators, and the condensed chromatin region as a pioneer factor. We identified new promoter/enhancer regions of the VEGF-responsive tip cell genes regulated by FOXO1: ESM1 and ANGPT2. This is the first study to identify cell type-specific FOXO1 functions, including VEGF-mediated tip cell definition in primary cultured ECs.
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Affiliation(s)
- Yuri Miyamura
- Divison of Molecular and Vascular Biology, IRDA, Kumamoto University, Kumamoto 860-0811, Japan
| | - Shunsuke Kamei
- Divison of Molecular and Vascular Biology, IRDA, Kumamoto University, Kumamoto 860-0811, Japan
| | - Misaki Matsuo
- Division of Genomics and Transcriptomics, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto 860-8556, Japan
| | - Masaya Yamazaki
- Division of Medical Biochemistry, Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan
| | - Shingo Usuki
- Liaison Laboratory Research Promotion Center, IMEG, Kumamoto University, Kumamoto 860-8556, Japan
| | - Keiichiro Yasunaga
- Liaison Laboratory Research Promotion Center, IMEG, Kumamoto University, Kumamoto 860-8556, Japan
| | - Akiyoshi Uemura
- Department of Retinal Vascular Biology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan
| | - Yorifumi Satou
- Division of Genomics and Transcriptomics, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hiroto Ohguchi
- Division of Disease Epigenetics, IRDA, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takashi Minami
- Divison of Molecular and Vascular Biology, IRDA, Kumamoto University, Kumamoto 860-0811, Japan
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2
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Yang T, Li G, Li X, Wei B, Su H, Liu W, Guo S, Yang N, Xu T, Duan C. VEGF combined with DAPT promotes tissue regeneration and remodeling in vascular grafts. Regen Biomater 2023; 10:rbad088. [PMID: 37899954 PMCID: PMC10603585 DOI: 10.1093/rb/rbad088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 08/28/2023] [Accepted: 09/14/2023] [Indexed: 10/31/2023] Open
Abstract
Previous research on tissue-engineered blood vessels (TEBVs) has mainly focused on the intima or adventitia unilaterally, neglecting the equal importance of both layers. Meanwhile, the efficacy of grafts modified with vascular endothelial growth factor (VEGF) merely has been limited. Here, we developed a small-diameter graft that can gradually release VEGF and γ secretase inhibitor IX (DAPT) to enhance tissue regeneration and remodeling in both the intima and adventitia. In vitro, experiments revealed that the combination of VEGF and DAPT had superior pro-proliferation and pro-migration effects on endothelial cells. In vivo, the sustained release of VEGF and DAPT from the grafts resulted in improved regeneration and remodeling. Specifically, in the intima, faster endothelialization and regeneration of smooth muscle cells led to higher patency rates and better remodeling. In the adventitia, a higher density of neovascularization, M2 macrophages and fibroblasts promoted cellular ingrowth and replacement of the implant with autologous neo-tissue. Furthermore, western blot analysis confirmed that the regenerated ECs were functional and the effect of DAPT was associated with increased expression of vascular endothelial growth factor receptor 2. Our study demonstrated that the sustained release of VEGF and DAPT from the graft can effectively promote tissue regeneration and remodeling in both the intima and adventitia. This development has the potential to significantly accelerate the clinical application of small-diameter TEBVs.
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Affiliation(s)
- Tao Yang
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Guangxu Li
- Department of Neurosurgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510630, China
| | - Xifeng Li
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Boyang Wei
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Hengxian Su
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Wenchao Liu
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Shenquan Guo
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Nan Yang
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Tao Xu
- Department of Bio-intelligent Manufacturing and Living Matter Bioprinting Center, Research Institute of Tsinghua University in Shenzhen, Tsinghua University, Shenzhen 518057, People’s Republic of China
- Department of Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People’s Republic of China
| | - Chuanzhi Duan
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
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3
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Oliveira RHM, Annex BH, Popel AS. Endothelial cells signaling and patterning under hypoxia: a mechanistic integrative computational model including the Notch-Dll4 pathway. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.03.539270. [PMID: 37205581 PMCID: PMC10187169 DOI: 10.1101/2023.05.03.539270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Several signaling pathways are activated during hypoxia to promote angiogenesis, leading to endothelial cell patterning, interaction, and downstream signaling. Understanding the mechanistic signaling differences between normoxia and hypoxia can guide therapies to modulate angiogenesis. We present a novel mechanistic model of interacting endothelial cells, including the main pathways involved in angiogenesis. We calibrate and fit the model parameters based on well-established modeling techniques. Our results indicate that the main pathways involved in the patterning of tip and stalk endothelial cells under hypoxia differ, and the time under hypoxia affects how a reaction affects patterning. Interestingly, the interaction of receptors with Neuropilin1 is also relevant for cell patterning. Our simulations under different oxygen concentrations indicate time- and oxygen-availability-dependent responses for the two cells. Following simulations with various stimuli, our model suggests that factors such as period under hypoxia and oxygen availability must be considered for pattern control. This project provides insights into the signaling and patterning of endothelial cells under hypoxia, contributing to studies in the field.
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Affiliation(s)
- Rebeca Hannah M Oliveira
- Department of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, Maryland, 21205, USA
| | - Brian H Annex
- Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Aleksander S Popel
- Department of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, Maryland, 21205, USA
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4
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Zhang X, Liu F, Gu Z. Tissue Engineering in Neuroscience: Applications and Perspectives. BME FRONTIERS 2023; 4:0007. [PMID: 37849680 PMCID: PMC10521717 DOI: 10.34133/bmef.0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 11/29/2022] [Indexed: 10/19/2023] Open
Abstract
Neurological disorders have always been a threat to human physical and mental health nowadays, which are closely related to the nonregeneration of neurons in the nervous system (NS). The damage to the NS is currently difficult to repair using conventional therapies, such as surgery and medication. Therefore, repairing the damaged NS has always been a vast challenge in the area of neurology. Tissue engineering (TE), which integrates the cell biology and materials science to reconstruct or repair organs and tissues, has widespread applications in bone, periodontal tissue defects, skin repairs, and corneal transplantation. Recently, tremendous advances have been made in TE regarding neuroscience. In this review, we summarize TE's recent progress in neuroscience, including pathological mechanisms of various neurological disorders, the concepts and classification of TE, and the most recent development of TE in neuroscience. Lastly, we prospect the future directions and unresolved problems of TE in neuroscience.
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Affiliation(s)
- Xiaoge Zhang
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Fuyao Liu
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhen Gu
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Department of General Surgery, Sir Run Run Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Jinhua Institute of Zhejiang University, Jinhua 321299, China
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5
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Yu J, Lee S, Song J, Lee SR, Kim S, Choi H, Kang H, Hwang Y, Hong YK, Jeon NL. Perfusable micro-vascularized 3D tissue array for high-throughput vascular phenotypic screening. NANO CONVERGENCE 2022; 9:16. [PMID: 35394224 PMCID: PMC8994007 DOI: 10.1186/s40580-022-00306-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/15/2022] [Indexed: 05/14/2023]
Abstract
Microfluidic organ-on-a-chip technologies have enabled construction of biomimetic physiologically and pathologically relevant models. This paper describes an injection molded microfluidic platform that utilizes a novel sequential edge-guided patterning method based on spontaneous capillary flow to realize three-dimensional co-culture models and form an array of micro-vascularized tissues (28 per 1 × 2-inch slide format). The MicroVascular Injection-Molded Plastic Array 3D Culture (MV-IMPACT) platform is fabricated by injection molding, resulting in devices that are reliable and easy to use. By patterning hydrogels containing human umbilical endothelial cells and fibroblasts in close proximity and allowing them to form vasculogenic networks, an array of perfusable vascularized micro-tissues can be formed in a highly efficient manner. The high-throughput generation of angiogenic sprouts was quantified and their uniformity was characterized. Due to its compact design (half the size of a 96-well microtiter plate), it requires small amount of reagents and cells per device. In addition, the device design is compatible with a high content imaging machine such as Yokogawa CQ-1. Furthermore, we demonstrated the potential of our platform for high-throughput phenotypic screening by testing the effect of DAPT, a chemical known to affect angiogenesis. The MV-IMPACT represent a significant improvement over our previous PDMS-based devices in terms of molding 3D co-culture conditions at much higher throughput with added reliability and robustness in obtaining vascular micro-tissues and will provide a platform for developing applications in drug screening and development.
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Affiliation(s)
- James Yu
- Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Somin Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jiyoung Song
- Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seung-Ryeol Lee
- Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Suryong Kim
- Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hyeri Choi
- Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Habin Kang
- Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Yunchan Hwang
- Department of Electrical Engineering and Computer Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Young-Kwon Hong
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Noo Li Jeon
- Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
- Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
- Institute of Advanced Machines and Design, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
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6
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Zhu P, Chen C, Wu D, Chen G, Tan R, Ran J. AGEs-induced MMP-9 activation mediated by Notch1 signaling is involved in impaired wound healing in diabetic rats. Diabetes Res Clin Pract 2022; 186:109831. [PMID: 35306046 DOI: 10.1016/j.diabres.2022.109831] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/08/2022] [Accepted: 03/12/2022] [Indexed: 11/03/2022]
Abstract
AIMS To elucidate the relationship between advanced glycation end products (AGEs), Notch1 signaling, nuclear factor-kappa B (NF-κB), and matrix metalloproteinase-9 (MMP-9) in diabetic wound healing in vitro and in vivo. METHODS We incubated primary keratinocytes with AGEs alone or AGEs along with γ-secretase inhibitor DAPT, and established diabetic rat wound model by intraperitoneal streptozotocin treatment. The Notch1 signaling components and MMP-9 expression were detected by qPCR, western blotting and gelatin zymography. RESULTS The exposure of primary keratinocytes to AGEs led to a significant increase in Notch intracellular domain (NICD), Delta-like 4 (Dll4), and Hes1; however, Notch1 expression was inhibited by the RAGE siRNA. Furthermore, MMP-9 activation was up-regulated, secondary to AGEs treatment. In contrast, increased MMP-9 expression by AGEs-stimulation was eliminated after treatment with DAPT. NF-κB activation participated in the Notch1-modulated MMP-9 expression. Notably, in the diabetic animal model, inhibition of the Notch signaling pathway with DAPT attenuated NICD and MMP-9 overexpression, improved collagen accumulation, and ultimately accelerated diabetic wound healing. CONCLUSIONS These findings identified that activation of the Notch1/NF-κB/MMP-9 pathway, in part, mediates the repressive effects of AGEs on diabetic wound healing and that targeting this pathway may be a potential strategy to improve impaired diabetic wound healing.
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Affiliation(s)
- Ping Zhu
- Department of Endocrinology and Metabolism, Guangzhou Red Cross Hospital, Jinan University, Guangzhou 510220, China
| | - Chuping Chen
- Department of Endocrinology and Metabolism, Guangzhou Red Cross Hospital, Jinan University, Guangzhou 510220, China
| | - Daoai Wu
- Department of Endocrinology and Metabolism, The First Affiliated Hospital, Bengbu Medical College, Bengbu 233099, China
| | - Guangshu Chen
- Department of Endocrinology and Metabolism, Guangzhou Red Cross Hospital, Jinan University, Guangzhou 510220, China
| | - Rongshao Tan
- Guangzhou Institute of Disease-Oriented Nutritional Research, Guangzhou Red Cross Hospital, Jinan University, Guangzhou 510220, China
| | - Jianmin Ran
- Department of Endocrinology and Metabolism, Guangzhou Red Cross Hospital, Jinan University, Guangzhou 510220, China.
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7
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Xing Z, Zhao C, Wu S, Zhang C, Liu H, Fan Y. Hydrogel-based therapeutic angiogenesis: An alternative treatment strategy for critical limb ischemia. Biomaterials 2021; 274:120872. [PMID: 33991951 DOI: 10.1016/j.biomaterials.2021.120872] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 04/24/2021] [Accepted: 05/02/2021] [Indexed: 02/08/2023]
Abstract
Critical limb ischemia (CLI) is the most severe clinical manifestation of peripheral arterial disease (PAD), resulting in the total or partial loss of limb function. Although the conventional treatment strategy of CLI (e.g., medical treatment and surgery) can improve blood perfusion and restore limb function, many patients are unsuitable for these strategies and they still face the threats of amputation or death. Therapeutic angiogenesis, as a potential solution for these problems, attempts to manipulate blood vessel growth in vivo for augment perfusion without the help of extra pharmaceutics and surgery. With the rise of interdisciplinary research, regenerative medicine strategies provide new possibilities for treating many clinical diseases. Hydrogel, as an excellent biocompatibility material, is an ideal candidate for delivering bioactive molecules and cells for therapeutic angiogenesis. Besides, hydrogel could precisely deliver, control release, and keep the bioactivity of cargos, making hydrogel-based therapeutic angiogenesis a new strategy for CLI therapy. In this review, we comprehensively discuss the approaches of hydrogel-based strategy for CLI treatment as well as their challenges, and future directions.
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Affiliation(s)
- Zheng Xing
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, PR China
| | - Chen Zhao
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, PR China
| | - Siwen Wu
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, PR China
| | - Chunchen Zhang
- Key Laboratory for Biomedical Engineering of Education Ministry of China, Zhejiang University, Hangzhou, 310027, PR China; Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, PR China
| | - Haifeng Liu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, PR China.
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, PR China.
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8
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Moody CT, Palvai S, Brudno Y. Click cross-linking improves retention and targeting of refillable alginate depots. Acta Biomater 2020; 112:112-121. [PMID: 32497743 PMCID: PMC7365769 DOI: 10.1016/j.actbio.2020.05.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/23/2020] [Accepted: 05/26/2020] [Indexed: 12/13/2022]
Abstract
Injectable alginate hydrogels have demonstrated utility in tissue engineering and drug delivery applications due in part to their mild gelation conditions, low host responses and chemical versatility. Recently, the potential of these gels has expanded with the introduction of refillable hydrogel depots - alginate gels chemically decorated with click chemistry groups to efficiently capture prodrug refills from the blood. Unfortunately, high degrees of click group substitution on alginate lead to poor viscoelastic properties and loss of ionic cross-linking. In this work, we introduce tetrabicyclononyne (tBCN) agents that covalently cross-link azide-modified alginate hydrogels for tissue engineering and drug delivery application in vivo. Adjusting cross-linker concentration allowed tuning the hydrogel mechanical properties for tissue-specific mechanical strength. The bioorthogonal and specific click reaction creates stable hydrogels with improved in vivo properties, including improved retention at injected sites. Azide-alginate hydrogels cross-linked with tBCN elicited minimal inflammation and maintained structural integrity over several months and efficiently captured therapeutics drug surrogates from the circulation. Taken together, azide-alginate hydrogels cross-linked with tBCN convey the benefits of alginate hydrogels for use in tissue engineering and drug delivery applications of refillable drug delivery depots. STATEMENT OF SIGNIFICANCE: Ionically cross-linked, injectable alginate biomaterials hold promise in many different clinical settings. However, adding new chemical functionality to alginate can disrupt their ionic cross-linking, limiting their utility. We have developed a "click" cross-linking strategy to improve the mechanical properties and tissue function of modified alginate biomaterials and enable them to capture small molecule drugs from the blood. We show that click cross-linked materials remain in place better than ionically cross-linked materials and efficiently capture payloads from the blood. Development of click cross-linking for refillable depots represents a crucial step toward clinical application of this promising drug delivery platform.
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Affiliation(s)
- Christopher T Moody
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA
| | - Sandeep Palvai
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA
| | - Yevgeny Brudno
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA.
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9
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Liao X, Yang X, Deng H, Hao Y, Mao L, Zhang R, Liao W, Yuan M. Injectable Hydrogel-Based Nanocomposites for Cardiovascular Diseases. Front Bioeng Biotechnol 2020; 8:251. [PMID: 32296694 PMCID: PMC7136457 DOI: 10.3389/fbioe.2020.00251] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 03/11/2020] [Indexed: 12/12/2022] Open
Abstract
Cardiovascular diseases (CVDs), including a series of pathological disorders, severely affect millions of people all over the world. To address this issue, several potential therapies have been developed for treating CVDs, including injectable hydrogels as a minimally invasive method. However, the utilization of injectable hydrogel is a bit restricted recently owing to some limitations, such as transporting the therapeutic agent more accurately to the target site and prolonging their retention locally. This review focuses on the advances in injectable hydrogels for CVD, detailing the types of injectable hydrogels (natural or synthetic), especially that complexed with stem cells, cytokines, nano-chemical particles, exosomes, genetic material including DNA or RNA, etc. Moreover, we summarized the mainly prominent mechanism, based on which injectable hydrogel present excellent treating effect of cardiovascular repair. All in all, it is hopefully that injectable hydrogel-based nanocomposites would be a potential candidate through cardiac repair in CVDs treatment.
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Affiliation(s)
- Xiaoshan Liao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
- The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Xushan Yang
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Hong Deng
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yuting Hao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Lianzhi Mao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Rongjun Zhang
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Wenzhen Liao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Miaomiao Yuan
- The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
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10
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Cai W, Liu S, Liu Z, Hou S, Lv Q, Cui H, Wang X, Zhang Y, Fan H, Ding H. Downregulation of lung miR-203a-3p expression by high-altitude hypoxia enhances VEGF/Notch signaling. Aging (Albany NY) 2020; 12:4247-4267. [PMID: 32112644 PMCID: PMC7093161 DOI: 10.18632/aging.102878] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/05/2020] [Indexed: 12/26/2022]
Abstract
Hypoxia-related microRNAs (miRNAs) are involved in the pathogenesis of various diseases. Because potential variations in miRNA expression mediated by hypoxic lung injury at high altitude remain incompletely characterized, we used a rat model to investigate the biochemical and miRNA changes induced by high-altitude hypoxia. After 24, 48, or 72 h of hypoxic exposure, expression of VEGF/Notch pathway-related proteins were increased in rat lung tissues. Microarray screening of hypoxic lung samples revealed 57 differentially expressed miRNAs, 19 of which were related to the VEGF/Notch signaling pathway. We verified that the top downregulated miRNA (miR-203a-3p) suppresses VEGF-A translation through direct binding and also indirectly reduces Notch1, VEGFR2, and Hes1 levels, which restricts the angiogenic capacity of pulmonary microvascular endothelial cells in vitro. These findings may aid in the development of new therapeutic strategies for the prevention and treatment of hypoxic lung injury at high altitude.
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Affiliation(s)
- Wei Cai
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China.,Logistics University of Chinese People's Armed Police Force, Tianjin 300162, China
| | - Sanli Liu
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China.,Logistics University of Chinese People's Armed Police Force, Tianjin 300162, China.,Health Company, 95985 Troops of PLA, Kaifeng 475000, Henan province, China
| | - Ziquan Liu
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China
| | - Shike Hou
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China
| | - Qi Lv
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China
| | - Huanhuan Cui
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China
| | - Xue Wang
- Characteristic Medical Center of Chinese People's Armed Police Force, Tianjin 300162, China
| | - Yuxin Zhang
- Medical Team of the Third Detachment of Beijing Armed Police Corp, Beijing 100000, China
| | - Haojun Fan
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China
| | - Hui Ding
- School of Disaster Medical Research, Tianjin University, Tianjin 300072, China.,The Second Hospital Affiliated Shaanxi University of Chinese Medicine, Shaanxi province, Xianyang 710054, China
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11
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Pearce HA, Kim YS, Diaz-Gomez L, Mikos AG. Tissue Engineering Scaffolds. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00082-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Thakar H, Sebastian SM, Mandal S, Pople A, Agarwal G, Srivastava A. Biomolecule-Conjugated Macroporous Hydrogels for Biomedical Applications. ACS Biomater Sci Eng 2019; 5:6320-6341. [DOI: 10.1021/acsbiomaterials.9b00778] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Abstract
The ability to generate new microvessels in desired numbers and at desired locations has been a long-sought goal in vascular medicine, engineering, and biology. Historically, the need to revascularize ischemic tissues nonsurgically (so-called therapeutic vascularization) served as the main driving force for the development of new methods of vascular growth. More recently, vascularization of engineered tissues and the generation of vascularized microphysiological systems have provided additional targets for these methods, and have required adaptation of therapeutic vascularization to biomaterial scaffolds and to microscale devices. Three complementary strategies have been investigated to engineer microvasculature: angiogenesis (the sprouting of existing vessels), vasculogenesis (the coalescence of adult or progenitor cells into vessels), and microfluidics (the vascularization of scaffolds that possess the open geometry of microvascular networks). Over the past several decades, vascularization techniques have grown tremendously in sophistication, from the crude implantation of arteries into myocardial tunnels by Vineberg in the 1940s, to the current use of micropatterning techniques to control the exact shape and placement of vessels within a scaffold. This review provides a broad historical view of methods to engineer the microvasculature, and offers a common framework for organizing and analyzing the numerous studies in this area of tissue engineering and regenerative medicine. © 2019 American Physiological Society. Compr Physiol 9:1155-1212, 2019.
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Affiliation(s)
- Joe Tien
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
- Division of Materials Science and Engineering, Boston University, Brookline, Massachusetts, USA
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Song L, Yuan X, Jones Z, Griffin K, Zhou Y, Ma T, Li Y. Assembly of Human Stem Cell-Derived Cortical Spheroids and Vascular Spheroids to Model 3-D Brain-like Tissues. Sci Rep 2019; 9:5977. [PMID: 30979929 PMCID: PMC6461701 DOI: 10.1038/s41598-019-42439-9] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 04/01/2019] [Indexed: 02/07/2023] Open
Abstract
Human cerebral organoids derived from induced pluripotent stem cells (iPSCs) provide novel tools for recapitulating the cytoarchitecture of human brain and for studying biological mechanisms of neurological disorders. However, the heterotypic interactions of neurovascular units, composed of neurons, pericytes, astrocytes, and brain microvascular endothelial cells, in brain-like tissues are less investigated. The objective of this study is to investigate the impacts of neural spheroids and vascular spheroids interactions on the regional brain-like tissue patterning in cortical spheroids derived from human iPSCs. Hybrid neurovascular spheroids were constructed by fusion of human iPSC-derived cortical neural progenitor cell (iNPC) spheroids, endothelial cell (iEC) spheroids, and the supporting human mesenchymal stem cells (MSCs). Single hybrid spheroids were constructed at different iNPC: iEC: MSC ratios of 4:2:0, 3:2:1 2:2:2, and 1:2:3 in low-attachment 96-well plates. The incorporation of MSCs upregulated the secretion levels of cytokines VEGF-A, PGE2, and TGF-β1 in hybrid spheroid system. In addition, tri-cultured spheroids had high levels of TBR1 (deep cortical layer VI) and Nkx2.1 (ventral cells), and matrix remodeling genes, MMP2 and MMP3, as well as Notch-1, indicating the crucial role of matrix remodeling and cell-cell communications on cortical spheroid and organoid patterning. Moreover, tri-culture system elevated blood-brain barrier gene expression (e.g., GLUT-1), CD31, and tight junction protein ZO1 expression. Treatment with AMD3100, a CXCR4 antagonist, showed the immobilization of MSCs during spheroid fusion, indicating a CXCR4-dependent manner of hMSC migration and homing. This forebrain-like model has potential applications in understanding heterotypic cell-cell interactions and novel drug screening in diseased human brain.
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Affiliation(s)
- Liqing Song
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA
| | - Xuegang Yuan
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA
| | - Zachary Jones
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida, USA
| | - Kyle Griffin
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA
| | - Yi Zhou
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida, USA
| | - Teng Ma
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA.
| | - Yan Li
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA.
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Deng S, Zeng Y, Wu L, Hu Z, Shen J, Shen Y, Shen Y, Zhou Y, Chen J, Lin S. The regulatory roles of VEGF-Notch signaling pathway on aplastic anemia with kidney deficiency and blood stasis. J Cell Biochem 2019; 120:2078-2089. [PMID: 30230583 DOI: 10.1002/jcb.27516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/27/2018] [Indexed: 01/24/2023]
Abstract
OBJECTIVE Vascular endothelial growth factor (VEGF)-Notch signaling pathway plays an important role in aplastic anemia (AA). This study aimed to evaluate the regulatory roles of VEGF-Notch signaling pathway on mesenchymal stem cells (MSCs) isolated from AA patients with kidney deficiency and blood stasis (KB) (AA MSCs). METHODS Expression of VEGF-Notch signaling related factors, including VEGF, VEGFR, Notch-1, Jagged1, Delta-like1, and hes1 was detected in bone marrow (BM) tissues and AA MSCs by Western blot analysis. VEGF (100 ng/mL) and γ-secretase inhibitor (DAPT) (10 μM) was used to active and inhibit VEGF-Notch signaling in AA MSCs, respectively. After treatment, the proliferation, apoptosis, and adipogenic differentiation of AA MSCs was detected by Cell Counting Kit-8, flow cytometry, and Oil red O staining, respectively. Lentivirus short hairpin RNA (shRNA) were constructed to downregulate Notch-1 and VEGF in normal bone marrow mesenchymal stem cells (BMSCs), and the effects of VEGF/Notch-1 shRNA transfected BMSCs on the proliferation, migration, and angiogenesis of human umbilical vein endothelial cells (HUVECs) were evaluated. RESULTS Significantly lower expression of VEGF, VEGFR, Notch-1, Jagged1, Delta-like1, and hes1 was revealed in AA BM tissues and AA MSCs when compared with the normal control (P < 0.05). The intervention of DAPT significantly inhibited the proliferation, and promoted the apoptosis and adipogenic differentiation of AA MSCs, while VEGF intervention exhibited opposite results (P < 0.05). Meanwhile, the proliferation, migration, and angiogenesis of HUVECs were significantly promoted by normal BMSCs, while inhibited by VEGF/Notch-1 shRNA transfected BMSCs (P < 0.05). CONCLUSION The activation of VEGF-Notch signaling pathway may be a potential therapeutic target for AA with KB.
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Affiliation(s)
- Shu Deng
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuqing Zeng
- Department of Orthopedics, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Liqiang Wu
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhiping Hu
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianping Shen
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Yiping Shen
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Yingying Shen
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuhong Zhou
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Jian Chen
- Department of Scientific Research, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Shengyun Lin
- Department of Hematology, First Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
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16
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The Notch Signaling System Is Involved in the Regulation of Reparative Angiogenesis in the Zone of Stasis. J Burn Care Res 2018; 38:e923-e933. [PMID: 28319529 DOI: 10.1097/bcr.0000000000000522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The Notch pathway ligand Delta-like 4 (Dll4) functions as an antiangiogenic factor, inhibiting vascular endothelial growth factor (VEGF)-induced angiogenesis. This function is documented in tumor and embryonic vasculature. However, its implication in burn wounds remains unexplored. Our objective was to explore the involvement of the Notch in the healing of zone of stasis burns. We hypothesized that anti-Dll4 therapy would prevent progressive necrosis in the stasis zone by promoting angiogenesis. Burns were created in 21 rats using the comb burn model. The Notch inhibitor N-[N-(3,5-difluorophenacetyl)-1-alanyl]-S-phenylglycine-t-butyl-ester was administered in the treatment group. Controls were given the same amount of solvent. Seven days after the burn, skin samples were evaluated for VEGF and Dll4 gene expressions. Immunohistochemical analysis was used for the assessment of vascular density, endothelial Dll4 expression, and apoptosis count. Histologic grading of tissue damage was performed. Circulating levels of VEGF and Dll4 were determined. VEGF and Dll4 mRNA levels were found to be simultaneously induced after the burn. In the treatment group, a significant increase in the number of vessels was observed. However, gross evaluation documented an expansion of necrosis to the zone of stasis with marked activation of apoptosis. Histologic assessment showed that the resultant vascular overgrowth was accompanied by extensive edema and abundant infiltration of leukocytes. We provide evidence for the involvement of Notch in the regulation of angiogenesis in zone of stasis burns.
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Yu T, Pan H, Hu Y, Tao H, Wang K, Zhang C. Autologous platelet-rich plasma induces bone formation of tissue-engineered bone with bone marrow mesenchymal stem cells on beta-tricalcium phosphate ceramics. J Orthop Surg Res 2017; 12:178. [PMID: 29157270 PMCID: PMC5697349 DOI: 10.1186/s13018-017-0665-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 10/24/2017] [Indexed: 11/16/2022] Open
Abstract
Background The purpose of the study is to investigate whether autologous platelet-rich plasma (PRP) can serve as bone-inducing factors to provide osteoinduction and improve bone regeneration for tissue-engineered bones fabricated with bone marrow mesenchymal stem cells (MSCs) and beta-tricalcium phosphate (β-TCP) ceramics. The current study will give more insight into the contradictory osteogenic capacity of PRP. Methods The concentration of platelets, platelet-derived growth factor-AB (PDGF-AB), and transforming growth factor-β1 (TGF-β1) were measured in PRP and whole blood. Tissue-engineered bones using MSCs on β-TCP scaffolds in combination with autologous PRP were fabricated (PRP group). Controls were established without the use of autologous PRP (non-PRP group). In vitro, the proliferation and osteogenic differentiation of MSCs on fabricated constructs from six rabbits were evaluated with MTT assay, alkaline phosphatase (ALP) activity, and osteocalcin (OC) content measurement after 1, 7, and 14 days of culture. For in vivo study, the segmental defects of radial diaphyses of 12 rabbits from each group were repaired by fabricated constructs. Bone-forming capacity of the implanted constructs was determined by radiographic and histological analysis at 4 and 8 weeks postoperatively. Results PRP produced significantly higher concentration of platelets, PDGF-AB, and TGF-β1 than whole blood. In vitro study, MTT assay demonstrated that the MSCs in the presence of autologous PRP exhibited excellent proliferation at each time point. The results of osteogenic capacity detection showed significantly higher levels of synthesis of ALP and OC by the MSCs in combination with autologous PRP after 7 and 14 days of culture. In vivo study, radiographic observation showed that the PRP group produced significantly higher score than the non-PRP group at each time point. For histological evaluation, significantly higher volume of regenerated bone was found in the PRP group when compared with the non-PRP group at each time point. Conclusions Our study findings support the osteogenic capacity of autologous PRP. The results indicate that the use of autologous PRP is a simple and effective way to provide osteoinduction and improve bone regeneration for tissue-engineered bone reconstruction.
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Affiliation(s)
- Tengbo Yu
- Department of Orthopaedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China
| | - Huazheng Pan
- Department of Clinical Laboratory, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China
| | - Yanling Hu
- Department of Orthopaedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China.
| | - Hao Tao
- Department of Orthopaedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China
| | - Kai Wang
- Department of Orthopaedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China
| | - Chengdong Zhang
- Department of Orthopaedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266000, People's Republic of China
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Anderson EM, Silva EA, Hao Y, Martinick KD, Lewin SA, Stafford AG, Doherty EG, Wang L, Doherty EJ, Grossman PM, Mooney DJ. VEGF and IGF Delivered from Alginate Hydrogels Promote Stable Perfusion Recovery in Ischemic Hind Limbs of Aged Mice and Young Rabbits. J Vasc Res 2017; 54:288-298. [PMID: 28930755 PMCID: PMC5642984 DOI: 10.1159/000479869] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 07/28/2017] [Indexed: 12/16/2022] Open
Abstract
Biomaterial-based delivery of angiogenic growth factors restores perfusion more effectively than bolus delivery methods in rodent models of peripheral vascular disease, but the same success has not yet been demonstrated in clinically relevant studies of aged or large animals. These studies explore, in clinically relevant models, a therapeutic angiogenesis strategy for the treatment of peripheral vascular disease that overcomes the challenges encountered in previous clinical trials. Alginate hydrogels providing sustained release of vascular endothelial growth factor (VEGF) and insulin-like growth factor-1 (IGF) were injected into ischemic hind limbs in middle-aged and old mice, and also in young rabbits, as a test of the scalability of this local growth factor treatment. Spontaneous perfusion recovery diminished with increasing age, and only the combination of VEGF and IGF delivery from gels significantly rescued perfusion in middle-aged (13 months) and old (20 months) mice. In rabbits, the delivery of VEGF alone or in combination with IGF from alginate hydrogels, at a dose 2 orders of magnitude lower than the typical doses used in past rabbit studies, enhanced perfusion recovery when given immediately after surgery, or as a treatment for chronic ischemia. Capillary density measurements and angiographic analysis demonstrated the benefit of gel delivery. These data together suggest that alginate hydrogels providing local delivery of low doses of VEGF and IGF constitute a safe and effective treatment for hind-limb ischemia in clinically relevant animal models, thereby supporting the potential clinical translation of this concept.
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Affiliation(s)
- Erin M Anderson
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Eduardo A Silva
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
- Department of Biomedical Engineering, University of California, Davis, CA 95616
| | - Yibai Hao
- Division of Cardiology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Kathleen D Martinick
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Sarah A Lewin
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Alexander G Stafford
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Elisabeth G Doherty
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Lin Wang
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
| | - Edward J Doherty
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Paul M Grossman
- Division of Cardiology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Dave J Mooney
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
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Baluk P, Yao LC, Flores JC, Choi D, Hong YK, McDonald DM. Rapamycin reversal of VEGF-C-driven lymphatic anomalies in the respiratory tract. JCI Insight 2017; 2:90103. [PMID: 28814666 DOI: 10.1172/jci.insight.90103] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 07/06/2017] [Indexed: 12/17/2022] Open
Abstract
Lymphatic malformations are serious but poorly understood conditions that present therapeutic challenges. The goal of this study was to compare strategies for inducing regression of abnormal lymphatics and explore underlying mechanisms. CCSP-rtTA/tetO-VEGF-C mice, in which doxycycline regulates VEGF-C expression in the airway epithelium, were used as a model of pulmonary lymphangiectasia. After doxycycline was stopped, VEGF-C expression returned to normal, but lymphangiectasia persisted for at least 9 months. Inhibition of VEGFR-2/VEGFR-3 signaling, Notch, β-adrenergic receptors, or autophagy and antiinflammatory steroids had no noticeable effect on the amount or severity of lymphangiectasia. However, rapamycin inhibition of mTOR reduced lymphangiectasia by 76% within 7 days without affecting normal lymphatics. Efficacy of rapamycin was not increased by coadministration with the other agents. In prevention trials, rapamycin suppressed VEGF-C-driven mTOR phosphorylation and lymphatic endothelial cell sprouting and proliferation. However, in reversal trials, no lymphatic endothelial cell proliferation was present to block in established lymphangiectasia, and rapamycin did not increase caspase-dependent apoptosis. However, rapamycin potently suppressed Prox1 and VEGFR-3. These experiments revealed that lymphangiectasia is remarkably resistant to regression but is responsive to rapamycin, which rapidly reduces and normalizes the abnormal lymphatics without affecting normal lymphatics.
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Affiliation(s)
- Peter Baluk
- Cardiovascular Research Institute, Department of Anatomy, and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA
| | - Li-Chin Yao
- Cardiovascular Research Institute, Department of Anatomy, and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA
| | - Julio C Flores
- Cardiovascular Research Institute, Department of Anatomy, and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA
| | - Dongwon Choi
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, USA
| | - Young-Kwon Hong
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, USA
| | - Donald M McDonald
- Cardiovascular Research Institute, Department of Anatomy, and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA
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He QS, Zhang L, Fan ZY, Feng G, Wang FJ, Liu ZQ, Tang T, Kuang SX. RETRACTED: Protective effects of total flavonoids in Caragana against hypoxia/reoxygenation-induced injury in human brain microvascular endothelial cells. Biomed Pharmacother 2017; 89:316-322. [PMID: 28236705 DOI: 10.1016/j.biopha.2017.01.106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 12/10/2016] [Accepted: 01/02/2017] [Indexed: 12/25/2022] Open
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief. An Expression of Concern for this article was previously published while an investigation was conducted (see related editorial: https://doi.org/10.1016/j.biopha.2022.113812). This retraction notice supersedes the Expression of Concern published earlier. Concern was raised about the reliability of the Transwell assay images shown in Figure 4A, which appear to contain similar features to those found in other publications, as detailed here: https://pubpeer.com/publications/FE1B7461C358F48E6838BF1622C291; and here: https://docs.google.com/spreadsheets/d/1r0MyIYpagBc58BRF9c3luWNlCX8VUvUuPyYYXzxWvgY/edit#gid=262337249. An additional suspected image duplication within Figure 5A was also identified. The journal requested the corresponding author comment on these concerns and provide the associated raw data. The authors did not respond to this request and therefore the Editor-in-Chief decided to retract the article.
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Affiliation(s)
- Qian-Song He
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China
| | - Li Zhang
- The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, PR China
| | - Zi-Yuan Fan
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China
| | - Guo Feng
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China
| | - Fu-Jiang Wang
- Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
| | - Zheng-Qi Liu
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China
| | - Ting Tang
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China
| | - Shi-Xiang Kuang
- Guiyang College of Traditional Chinese Medicine, Guiyang, 550025, PR China.
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Abbas OL, Terzi YK, Özatik O, Özatik FY, Turna G, Nar R, Musmul A. Enhancement of vascular endothelial growth factor's angiogenic capacity by the therapeutic modulation of notch signalling improves tram flap survival in rats submitted to nicotine. J Plast Surg Hand Surg 2017; 51:405-413. [PMID: 28277073 DOI: 10.1080/2000656x.2017.1285784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Smoke of cigarettes, and specifically nicotine, has been shown to diminish pedicled transverse rectus abdominis musculocutaneous (TRAM) flap survival. Considering that Notch signalling through its ligand Delta-like 4 (Dll4) functions as anti-angiogenic factor by inhibiting the pro-angiogenic effects of vascular endothelial growth factor (VEGF), it is hypothesised that inhibition of the Notch would promote angiogenesis and increase TRAM flap survival in rats submitted to nicotine. METHODS Twenty rats were treated with nicotine for 28 days preoperatively. Thereafter, a pedicled TRAM flap was created in all animals. The Notch inhibitor N-[N-(3,5-difluorophenacetyl)-1-alanyl]-S-phenylglycine-t-butyl-ester was administered in animals of the treatment group. Animals in the control group were given the same amount of solvent. Five days after the surgery, viable flap areas were determined. Skin samples were evaluated for VEGF and Dll4 mRNA levels. Immunohistochemical analysis was used for the assessment of endothelial Dll4 expression. Vascular density was determined histologically. Plasma levels of VEGF and Dll4 were measured. RESULTS A significant improvement in TRAM flap surviving area was observed in the treatment group (53.50 ± 14.25%) compared with the controls (32.20 ± 9.15%). Immunohistochemical analysis revealed a significant increase in the number of Dll4 stained vessels in animals of the treatment group (9.2 ± 1.6) in comparison with the controls (5.7 ± 1.9). VEGF mRNA levels (0.22 ± 0.08) in the treatment group were significantly lower than those in the control group (0.36 ± 0.09). CONCLUSION Notch inhibition significantly improved TRAM flap survival in animals exposed to nicotine by promoting VEGF-induced angiogenesis.
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Affiliation(s)
- Ozan Luay Abbas
- a Faculty of Medicine, Department of Plastic, Reconstructive and Aesthetic Surgery , Ahi Evran University , Kırşehir , Turkey
| | - Yunus Kasım Terzi
- b Faculty of Medicine, Department of Medical Genetics , Başkent University , Ankara , Turkey
| | - Orhan Özatik
- c Faculty of Medicine, Department of Histology and Embryology , Ahi Evran University , Kırşehir , Turkey
| | - Fikriye Yasemin Özatik
- d Faculty of Medicine, Department of Pharmacology , Ahi Evran University , Kırşehir , Turkey
| | - Gamze Turna
- e Faculty of Medicine, Department of Biochemistry , Ahi Evran University , Kırşehir , Turkey
| | - Rukiye Nar
- e Faculty of Medicine, Department of Biochemistry , Ahi Evran University , Kırşehir , Turkey
| | - Ahmet Musmul
- f Faculty of Medicine, Department of Biostatistics , Osmangazi University , Eskişehir , Turkey
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Li GJ, Yang Y, Yang GK, Wan J, Cui DL, Ma ZH, Du LJ, Zhang GM. Slit2 suppresses endothelial cell proliferation and migration by inhibiting the VEGF-Notch signaling pathway. Mol Med Rep 2017; 15:1981-1988. [PMID: 28260032 PMCID: PMC5364956 DOI: 10.3892/mmr.2017.6240] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 11/10/2016] [Indexed: 11/11/2022] Open
Abstract
Slit homolog 2 (Slit2) is distributed in various tissues and participates in numerous cellular processes; however, the role of Slit2 in the regulation of angiogenesis remains controversial, since it has previously been reported to exert proangiogenic and antiangiogenic activities. The present study aimed to investigate the effects of Slit2 on vascular endothelial cell proliferation and migration in vitro, and to reveal the possible underlying signaling pathway. Aortic endothelial cells were isolated from Sprague Dawley rats and cultured. Cell proliferation assay, cell migration assay, immunocytochemistry and small interfering RNA transfection were subsequently performed. The results demonstrated that exogenous Slit2 administration markedly suppressed TNF-α-induced endothelial cell proliferation and migration in vitro. In addition, TNF-α application upregulated the protein expression levels of vascular endothelial growth factor (VEGF) and Notch in RAECs, whereas Slit2 administration downregulated VEGF and Notch expression in RAECs cultured in TNF-α conditioned medium. Further studies indicated that knockdown of VEGF suppressed the effects of TNF-α on the induction of RAEC proliferation and migration. VEGF knockdown-induced inhibition of RAEC proliferation and migration in TNF-α conditioned medium was also achieved without Slit2 administration. Furthermore, VEGF knockdown markedly decreased Notch1 and Notch2 expression. These results indicated that Slit2 suppresses TNF-α-induced vascular endothelial cell proliferation and migration in vitro by inhibiting the VEGF-Notch signaling pathway. Therefore, Slit2 may inhibit the proliferation and migration of endothelial cells during vascular development.
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Affiliation(s)
- Guo-Jian Li
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Yong Yang
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Guo-Kai Yang
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Jia Wan
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Dao-Lei Cui
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Zhen-Huan Ma
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Ling-Juan Du
- Department of Vascular Surgery, The Fourth Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650021, P.R. China
| | - Gui-Min Zhang
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan 650032, P.R. China
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Brucine inhibits bone metastasis of breast cancer cells by suppressing Jagged1/Notch1 signaling pathways. Chin J Integr Med 2016; 23:110-116. [DOI: 10.1007/s11655-016-2647-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Indexed: 10/20/2022]
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Cai Z, Zhao B, Deng Y, Shangguan S, Zhou F, Zhou W, Li X, Li Y, Chen G. Notch signaling in cerebrovascular diseases (Review). Mol Med Rep 2016; 14:2883-98. [PMID: 27574001 PMCID: PMC5042775 DOI: 10.3892/mmr.2016.5641] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 07/22/2016] [Indexed: 12/30/2022] Open
Abstract
The Notch signaling pathway is a crucial regulator of numerous fundamental cellular processes. Increasing evidence suggests that Notch signaling is involved in inflammation and oxidative stress, and thus in the progress of cerebrovascular diseases. In addition, Notch signaling in cerebrovascular diseases is associated with apoptosis, angiogenesis and the function of blood-brain barrier. Despite the contradictory results obtained to date as to whether Notch signaling is harmful or beneficial, the regulation of Notch signaling may provide a novel strategy for the treatment of cerebrovascular diseases.
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Affiliation(s)
- Zhiyou Cai
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Bin Zhao
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Yanqing Deng
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Shouqin Shangguan
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Faming Zhou
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Wenqing Zhou
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Xiaoli Li
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Yanfeng Li
- Department of Neurology, Peking Union Medical College Hospital, Beijing 100730, P.R. China
| | - Guanghui Chen
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
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Abstract
There is an immense need for tissue engineered blood vessels. However, current tissue engineering approaches still lack the ability to build native blood vessel-like perfusable structures with multi-layered vascular walls. This paper demonstrated a new method to fabricate tri-layer biomimetic blood vessel-like structures on a microfluidic platform using photocrosslinkable gelatin hydrogel. The presented method enables fabrication of physiological blood vessel-like structures with mono-, bi- or tri-layer vascular walls. The diameter of the vessels, the total thickness of the vessel wall and the thickness of each individual layer of the wall were independently controlled. The developed fabrication process is a simple and rapid method, allowing the physical fabrication of the vascular structure in minutes, and the formation of a vascular endothelial cell layer inside the vessels in 3-5 days. The fabricated vascular constructs can potentially be used in numerous applications including drug screening, development of in vitro models for cardiovascular diseases and/or cancer metastasis, and study of vascular biology and mechanobiology.
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Pannella M, Caliceti C, Fortini F, Aquila G, Vieceli Dalla Sega F, Pannuti A, Fortini C, Morelli MB, Fucili A, Francolini G, Voltan R, Secchiero P, Dinelli G, Leoncini E, Ferracin M, Hrelia S, Miele L, Rizzo P. Serum From Advanced Heart Failure Patients Promotes Angiogenic Sprouting and Affects the Notch Pathway in Human Endothelial Cells. J Cell Physiol 2016; 231:2700-10. [PMID: 26987674 DOI: 10.1002/jcp.25373] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/10/2016] [Indexed: 12/21/2022]
Abstract
It is unknown whether components present in heart failure (HF) patients' serum provide an angiogenic stimulus. We sought to determine whether serum from HF patients affects angiogenesis and its major modulator, the Notch pathway, in human umbilical vein endothelial cells (HUVECs). In cells treated with serum from healthy subjects or from patients at different HF stage we determined: (1) Sprouting angiogenesis, by measuring cells network (closed tubes) in collagen gel. (2) Protein levels of Notch receptors 1, 2, 4, and ligands Jagged1, Delta-like4. We found a higher number of closed tubes in HUVECs treated with advanced HF patients serum in comparison with cells treated with serum from mild HF patients or controls. Furthermore, as indicated by the reduction of the active form of Notch4 (N4IC) and of Jagged1, advanced HF patients serum inhibited Notch signalling in HUVECs in comparison with mild HF patients' serum and controls. The circulating levels of NT-proBNP (N-terminal of the pro-hormone brain natriuretic peptide), a marker for the detection and evalutation of HF, were positively correlated with the number of closed tubes (r = 0.485) and negatively with Notch4IC and Jagged1 levels in sera-treated cells (r = -0.526 and r = -0.604, respectively). In conclusion, we found that sera from advanced HF patients promote sprouting angiogenesis and dysregulate Notch signaling in HUVECs. Our study provides in vitro evidence of an angiogenic stimulus arising during HF progression and suggests a role for the Notch pathway in it. J. Cell. Physiol. 231: 2700-2710, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Micaela Pannella
- Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Cristiana Caliceti
- Department of Chemistry "G. Ciamician", University of Bologna, Bologna, Italy
| | - Francesca Fortini
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Giorgio Aquila
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | | | - Antonio Pannuti
- Stanley Scott Cancer Center, Louisiana State University Health Sciences Center and Louisiana Cancer Research Consortium, New Orleans, Louisiana
| | - Cinzia Fortini
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | | | - Alessandro Fucili
- University Hospital of Ferrara, Ferrara, Italy.,Maria Cecilia Hospital, GVM Care & Research, E.S. Health Science Foundation, Cotignola, Italy
| | - Gloria Francolini
- Cardiovascular Research Center, Salvatore Maugeri Foundation IRCCS, Lumezzane, Italy
| | - Rebecca Voltan
- Department of Morphology, Surgery, and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Paola Secchiero
- Department of Morphology, Surgery, and Experimental Medicine, University of Ferrara, Ferrara, Italy.,Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | - Giovanni Dinelli
- Department of Agricultural Sciences, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Emanuela Leoncini
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Manuela Ferracin
- Department of Experimental, Diagnostic and Specialty Medicine-DIMES, University of Bologna, Bologna, Italy
| | - Silvana Hrelia
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Lucio Miele
- Stanley Scott Cancer Center, Louisiana State University Health Sciences Center and Louisiana Cancer Research Consortium, New Orleans, Louisiana
| | - Paola Rizzo
- Department of Morphology, Surgery, and Experimental Medicine, University of Ferrara, Ferrara, Italy
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Schmidt J, Lee MK, Ko E, Jeong JH, DiPietro LA, Kong H. Alginate Sulfates Mitigate Binding Kinetics of Proangiogenic Growth Factors with Receptors toward Revascularization. Mol Pharm 2016; 13:2148-54. [PMID: 26881299 DOI: 10.1021/acs.molpharmaceut.5b00905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ever since proangiogenic growth factors have been used as a vascular medicine to treat tissue ischemia, efforts have been increasingly made to develop a method to enhance efficacy of growth factors in recreating microvascular networks, especially at low dose. To this end, we hypothesized that polysaccharides substituted with sulfate groups would amplify growth factor receptor activation and stimulate phenotypic activities of endothelial cells involved in neovascularization. We examined this hypothesis by modifying alginate with a controlled number of sulfates and using it to derive a complex with vascular endothelial growth factor (VEGF), as confirmed with fluorescence resonance energy transfer (FRET) assay. Compared with the bare VEGF and with a mixture of VEGF and unmodified alginates, the VEGF complexed with alginate sulfates significantly reduced the dissociation rate with the VEGFR-2, elevated VEGFR-2 phosphorylation level, and increased the number of endothelial sprouts in vitro. Furthermore, the VEGF-alginate sulfate complex improved recovery of perfusion in an ischemic hindlimb of a mouse due to the increase of the capillary density. Overall, this study not only demonstrates an important cofactor of VEGF but also uncovers an underlying mechanism by which the cofactor mitigates the VEGF-induced signaling involved in the binding kinetics and activation of VEGFR. We therefore believe that the results of this study will be highly useful in improving the therapeutic efficacy of various growth factors and expediting their uses in clinical treatments of wounds and tissue defects.
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Affiliation(s)
- John Schmidt
- Department of Chemical and Biomolecular Engineering, Carl R. Woese Institute of Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Min Kyung Lee
- Department of Chemical and Biomolecular Engineering, Carl R. Woese Institute of Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Eunkyung Ko
- Department of Bioengineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jae Hyun Jeong
- Department of Chemical Engineering, Soongsil University , Seoul, Korea
| | - Luisa A DiPietro
- College of Dentistry University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular Engineering, Carl R. Woese Institute of Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.,Department of Bioengineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.,Department of Chemical Engineering, Soongsil University , Seoul, Korea
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Sukmawati D, Tanaka R, Ito-Hirano R, Fujimura S, Hayashi A, Itoh S, Mizuno H, Daida H. The role of Notch signaling in diabetic endothelial progenitor cells dysfunction. J Diabetes Complications 2016; 30:12-20. [PMID: 26598222 DOI: 10.1016/j.jdiacomp.2015.09.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 09/06/2015] [Accepted: 09/24/2015] [Indexed: 12/24/2022]
Abstract
AIMS To investigate the role of Notch signaling pathway in vasculogenic dysfunction of diabetic EPCs (DM-EPCs). METHODS The study was performed in mice and diabetes was induced with Streptozotocin. The functional consequences of Notch pathway modulation were studied by assessment of colony forming capacity (EPC colony forming assay), EPC differentiation capacity (% of definitive EPC-CFU (dEPC-CFU)), circulating EPCs (EPC culture assay) and migrated cells (migration assay); in the presence of Notch inhibitor (γ-secretase inhibitors (GSI)) compared to control. Notch pathway and VEGF involvement in DM- EPCs were assessed by gene expression (RT-qPCR). RESULTS DM demonstrated to increase Notch pathway expression in bone marrow (BM) EPCs followed by lower EPC-CFU number, EPCs differentiation capacity, number of circulating EPCs, migrated cells and VEGF expression compared to control (p<0.05). Inhibition of Notch pathway by GSI rescued vasculogenic dysfunction in DM-EPCs as represented by increase in EPC-CFU number, differentiation capacity and number of circulating EPCs (p<0.05). CONCLUSION Our findings indicate the involvement of Notch pathway in mediating DM-EPCs dysfunction including less number of EPC-CFU, circulating EPCs and migrated cell number compared to control. Further in vitro inhibition of Notch pathway by GSI rescued DM-EPC dysfunction. Therefore targeting Notch pathway in DM may provide a target to restore DM-EPC dysfunction.
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Affiliation(s)
- Dewi Sukmawati
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan; Department of Cardiovascular Medicine, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan; Department of Histology, Faculty of Medicine, Universitas Indonesia, Jakarta, Jalan Salemba Raya No. 6 Jakarta Pusat, 10430, Indonesia.
| | - Rica Tanaka
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Rie Ito-Hirano
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Satoshi Fujimura
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Ayato Hayashi
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Seigo Itoh
- Department of Cardiovascular Medicine, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Hiroshi Mizuno
- Department of Plastic Reconstructive Surgery, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
| | - Hiroyuki Daida
- Department of Cardiovascular Medicine, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.
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Ma L, Wang SC, Tong J, Hu Y, Zhang YQ, Yu Q. Activation and dynamic expression of Notch signalling in dental pulp cells after injury in vitro and in vivo. Int Endod J 2015; 49:1165-1174. [PMID: 26572232 DOI: 10.1111/iej.12580] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 11/06/2015] [Indexed: 01/03/2023]
Abstract
AIM To investigate the expression pattern of Notch signalling in odontoblast-like cells stimulated by lipopolysaccharide (LPS) in vitro, and in injured rat dental pulp in vivo. METHODOLOGY Mouse odontoblast-like cells (MDPC-23) were exposed to LPS. Expression of Notch-related genes was detected by real-time PCR. A rat pulpitis model was established by mechanical injury and LPS plus mechanical injury was followed by the analysis of expression of Notch2 by immunohistochemical staining. One-way analysis of variance (anova) was performed to examine the effect of differing concentrations of LPS on cell proliferation, and least significant difference test was used for paired comparisons. For independent sample, t-test was performed to compare the expression of Notch signalling genes between LPS group and control group in vitro. RESULTS The in vitro study revealed the proliferation of MDPC-23 cells on exposure to 10 ng mL-1 to 1 μg mL-1 LPS. Expression of Notch1 and Notch2 was significantly higher in the LPS group than that in the control group on day 1 and day 3 (P ˂ 0.05). The levels of both Delta1 and Jagged1 were higher in the study group than in the control group on day 3 (P = 0.019 and P = 0.034) and day 5 (P ˂ 0.001 and P = 0.046), respectively. In addition, Hes1 levels were significantly higher in the study group than in the control group on day 5 (P = 0.005). The in vivo study demonstrated positive staining for Notch2, both in the mechanical injury (MI) group and in the LPS plus mechanical injury (LMI) group from day 3 to day 7, which showed very weak or absent staining on day 14, thereby demonstrating the dynamic nature of the change. CONCLUSIONS Both in vitro and in vivo activation and dynamic expression of Notch signalling in dental pulp cells after injury were found. Notch signalling activation by LPS stimulation or mechanical injury showed a similar pattern in vivo.
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Affiliation(s)
- L Ma
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry & Endodontics, The Fourth Military Medical University, Xi'an, China
| | - S C Wang
- Department of Preventive Dentistry, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - J Tong
- Department of Preventive Dentistry, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Y Hu
- Department of Preventive Dentistry, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Y Q Zhang
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry & Endodontics, The Fourth Military Medical University, Xi'an, China
| | - Q Yu
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry & Endodontics, The Fourth Military Medical University, Xi'an, China
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Inhibition of the Notch Pathway Promotes Flap Survival by Inducing Functional Angiogenesis: Reply. Ann Plast Surg 2015; 75:579-80. [PMID: 26461102 DOI: 10.1097/sap.0000000000000500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shokry H, Vanamo U, Wiltschka O, Niinimäki J, Lerche M, Levon K, Linden M, Sahlgren C. Mesoporous silica particle-PLA-PANI hybrid scaffolds for cell-directed intracellular drug delivery and tissue vascularization. NANOSCALE 2015; 7:14434-14443. [PMID: 26252158 DOI: 10.1039/c5nr03983e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Instructive materials are expected to revolutionize stem cell based tissue engineering. As many stem cell cues have adverse effects on normal tissue homeostasis, there is a need to develop bioactive scaffolds which offer locally retained and cell-targeted drug delivery for intracellular release in targeted cell populations. Further, the scaffolds need to support vascularization to promote tissue growth and function. We have developed an electrospun PLA-PANI fiber scaffold, and incorporated mesoporous silica nanoparticles within the scaffold matrix to obtain cell-targeted and localized drug delivery. The isotropy of the scaffold can be tuned to find the optimal morphology for a given application and the scaffold is electroactive to support differentiation of contractile tissues. We demonstrate that there is no premature drug release from particles under physiological conditions over a period of one week and that the drug is released upon internalization of particles by cells within the scaffold. The scaffold is biocompatible, supports muscle stem cell differentiation and cell-seeded scaffolds are vascularized in vivo upon transplantation on the chorioallantoic membrane of chicken embryos. The scaffold is a step towards instructive biomaterials for local control of stem cell differentiation, and tissue formation supported by vascularization and without adverse effects on the homeostasis of adjacent tissues due to diffusion of biological cues.
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Affiliation(s)
- Hussein Shokry
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, P.O. Box 123, FI-20521, Turku, Finland.
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Liu X, Luo Q, Zheng Y, Liu X, Hu Y, Wang F, Zou L. The role of Delta-like 4 ligand/Notch-ephrin-B2 cascade in the pathogenesis of preeclampsia by regulating functions of endothelial progenitor cell. Placenta 2015. [DOI: 10.1016/j.placenta.2015.07.123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Lee S, Valmikinathan CM, Byun J, Kim S, Lee G, Mokarram N, Pai SB, Um E, Bellamkonda RV, Yoon YS. Enhanced therapeutic neovascularization by CD31-expressing cells and embryonic stem cell-derived endothelial cells engineered with chitosan hydrogel containing VEGF-releasing microtubes. Biomaterials 2015; 63:158-67. [PMID: 26102992 DOI: 10.1016/j.biomaterials.2015.06.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 06/07/2015] [Accepted: 06/10/2015] [Indexed: 12/14/2022]
Abstract
Various stem cells and their progeny have been used therapeutically for vascular regeneration. One of the major hurdles for cell-based therapy is low cell retention in vivo, and to improve cell survival several biomaterials have been used to encapsulate cells before transplantation. Vascular regeneration involves new blood vessel formation which consists of two processes, vasculogenesis and angiogenesis. While embryonic stem cell (ESC)-derived endothelial cells (ESC-ECs) have clearer vasculogenic potency, adult cells exert their effects mainly through paracrine angiogenic activities. While these two cells have seemingly complementary advantages, there have not been any studies to date combining these two cell types for vascular regeneration. We have developed a novel chitosan-based hydrogel construct that encapsulates both CD31-expressing BM-mononuclear cells (BM-CD31(+) cells) and ESC-ECs, and is loaded with VEGF-releasing microtubes. This cell construct showed high cell survival and minimal cytotoxicity in vitro. When implanted into a mouse model of hindlimb ischemia, it induced robust cell retention, neovascularization through vasculogenesis and angiogenesis, and efficiently induced recovery of blood flow in ischemic hindlimbs. This chitosan-based hydrogel encapsulating mixed adult and embryonic cell derivatives and containing VEGF can serve as a novel platform for treating various cardiovascular diseases.
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Affiliation(s)
- Sangho Lee
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA
| | - Chandra M Valmikinathan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, 313 Ferst Drive, Atlanta, GA 30332, USA
| | - Jaemin Byun
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA
| | - Sangsung Kim
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA
| | - Geehee Lee
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA
| | - Nassir Mokarram
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, 313 Ferst Drive, Atlanta, GA 30332, USA
| | - S Balakrishna Pai
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, 313 Ferst Drive, Atlanta, GA 30332, USA
| | - Elisa Um
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA
| | - Ravi V Bellamkonda
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, 313 Ferst Drive, Atlanta, GA 30332, USA
| | - Young-sup Yoon
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, 313 Ferst Drive, Atlanta, GA 30332, USA; Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 120-752, South Korea.
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Blatchley MR, Gerecht S. Acellular implantable and injectable hydrogels for vascular regeneration. Biomed Mater 2015; 10:034001. [DOI: 10.1088/1748-6041/10/3/034001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Rizzo P, Mele D, Caliceti C, Pannella M, Fortini C, Clementz AG, Morelli MB, Aquila G, Ameri P, Ferrari R. The role of notch in the cardiovascular system: potential adverse effects of investigational notch inhibitors. Front Oncol 2015; 4:384. [PMID: 25629006 PMCID: PMC4292456 DOI: 10.3389/fonc.2014.00384] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 12/22/2014] [Indexed: 12/17/2022] Open
Abstract
Targeting the Notch pathway is a new promising therapeutic approach for cancer patients. Inhibition of Notch is effective in the oncology setting because it causes a reduction of highly proliferative tumor cells and it inhibits survival of cancer stem cells, which are considered responsible for tumor recurrence and metastasis. Additionally, since Delta-like ligand 4 (Dll4)-activated Notch signaling is a major modulator of angiogenesis, anti-Dll4 agents are being investigated to reduce vascularization of the tumor. Notch plays a major role in the heart during the development and, after birth, in response to cardiac damage. Therefore, agents used to inhibit Notch in the tumors (gamma secretase inhibitors and anti-Dll4 agents) could potentially affect myocardial repair. The past experience with trastuzumab and other tyrosine kinase inhibitors used for cancer therapy demonstrates that the possible cardiotoxicity of agents targeting shared pathways between cancer and heart and the vasculature should be considered. To date, Notch inhibition in cancer patients has resulted only in mild gastrointestinal toxicity. Little is known about the potential long-term cardiotoxicity associated to Notch inhibition in cancer patients. In this review, we will focus on mechanisms through which inhibition of Notch signaling could lead to cardiomyocytes and endothelial dysfunctions. These adverse effects could contrast with the benefits of therapeutic responses in cancer cells during times of increased cardiac stress and/or in the presence of cardiovascular risk factor.
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Affiliation(s)
- Paola Rizzo
- Department of Medical Sciences, University of Ferrara , Ferrara , Italy ; Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara , Ferrara , Italy ; GVM Hospitals , Cotignola , Italy
| | - Donato Mele
- Azienda Ospedaliero-Universitaria di Ferrara , Cona , Italy
| | | | - Micaela Pannella
- Department of Medical Sciences, University of Ferrara , Ferrara , Italy
| | - Cinzia Fortini
- Department of Medical Sciences, University of Ferrara , Ferrara , Italy
| | | | | | - Giorgio Aquila
- Department of Medical Sciences, University of Ferrara , Ferrara , Italy
| | - Pietro Ameri
- Research Center of Cardiovascular Biology, Department of Internal Medicine, University of Genova , Genova , Italy
| | - Roberto Ferrari
- Department of Medical Sciences, University of Ferrara , Ferrara , Italy ; Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara , Ferrara , Italy ; Azienda Ospedaliero-Universitaria di Ferrara , Cona , Italy
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Wang W, Guo L, Yu Y, Chen Z, Zhou R, Yuan Z. Peptide REDV-modified polysaccharide hydrogel with endothelial cell selectivity for the promotion of angiogenesis. J Biomed Mater Res A 2014; 103:1703-12. [PMID: 25103847 DOI: 10.1002/jbm.a.35306] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 07/28/2014] [Indexed: 11/06/2022]
Abstract
Rapid and controlled vascularization of engineered tissues remains one of the key limitations in thick tissue engineering. Although many studies have focused on improving the rapid vascularization through the immobilization of bioactive molecules, the competition in growth between endothelial cells (ECs) and other cell types is to some extent neglected. In this study, we developed a peptide GREDV-modified scaffold for selective adhesion of human umbilical vein endothelial cells (HUVECs) through the specific recognition of the REDV peptide and integrin α4 β1 . In vitro studies showed that GREDV-conjugated alginate (ALG-GREDV) improved HUVEC adhesion, migration and proliferation when compared with a non-modified group. Furthermore, ALG-GREDV exhibited a superior capability for promoting the proliferation and selective adhesion of HUVEC over that of other peptide (RGD and YIGSR) modified groups (ALG-Pep). In vivo angiogenic assays demonstrated that the ALG-GREDV scaffold induced an angiogenic potential by stimulating new vessel formation and showed the highest blood vessel density among all samples after 21 days of implanting (83.7 vessels/mm(2) ). More importantly, the blood vessel density in cambium fibrous tissue of ALG-GREDV was about 1.5 times greater than other ALG-Pep groups, indicating facilitation of ALG-GREDV on selective angiogenesis in vivo. These results demonstrated that REDV-conjugated alginate could be a useful scaffold for stimulating and inducing angiogenesis in tissue-engineered applications.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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Boras E, Slevin M, Alexander MY, Aljohi A, Gilmore W, Ashworth J, Krupinski J, Potempa LA, Al Abdulkareem I, Elobeid A, Matou-Nasri S. Monomeric C-reactive protein and Notch-3 co-operatively increase angiogenesis through PI3K signalling pathway. Cytokine 2014; 69:165-79. [PMID: 24972386 DOI: 10.1016/j.cyto.2014.05.027] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 05/13/2014] [Accepted: 05/30/2014] [Indexed: 11/29/2022]
Abstract
C-reactive protein (CRP) is the most acute-phase reactant serum protein of inflammation and a strong predictor of cardiovascular disease. Its expression is associated with atherosclerotic plaque instability and the formation of immature micro-vessels. We have previously shown that CRP upregulates endothelial-derived Notch-3, a key receptor involved in vascular development, remodelling and maturation. In this study, we investigated the links between the bioactive monomeric CRP (mCRP) and Notch-3 signalling in angiogenesis. We used in vitro (cell counting, wound-healing and tubulogenesis assays) and in vivo (chorioallantoic membrane) angiogenic assays and Western blotting to study the angiogenic signalling pathways induced by mCRP and Notch-3 activator chimera protein (Notch-3/Fc). Our results showed an additive effect on angiogenesis of mCRP stimulatory effect combined with Notch-3/Fc promoting bovine aortic endothelial cell (BAEC) proliferation, migration, tube formation in Matrigel(TM) with up-regulation of phospho-Akt expression. The pharmacological blockade of PI3K/Akt survival pathway by LY294002 fully inhibited in vitro and in vivo angiogenesis induced by mCRP/Notch-3/Fc combination while blocking Notch signalling by gamma-secretase inhibitor (DAPT) partially inhibited mCRP/Notch-3/Fc-induced angiogenesis. Using a BAEC vascular smooth muscle cell co-culture sprouting angiogenesis assay and transmission electron microscopy, we showed that activation of both mCRP and Notch-3 signalling induced the formation of thicker sprouts which were shown later by Western blotting to be associated with an up-regulation of N-cadherin expression and a down-regulation of VE-cadherin expression. Thus, mCRP combined with Notch-3 activator promote angiogenesis through the PI3K/Akt pathway and their therapeutic combination has potential to promote and stabilize vessel formation whilst reducing the risk of haemorrhage from unstable plaques.
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Affiliation(s)
- Emhamed Boras
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Mark Slevin
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - M Yvonne Alexander
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK; Institute of Cardiovascular Sciences, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9NT, UK
| | - Ali Aljohi
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - William Gilmore
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Jason Ashworth
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Jerzy Krupinski
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK; Hospital Universitari Mútua de Terrassa, Department of Neurology, Cerebrovascular Diseases Unit, Terrassa, Barcelona, Spain
| | | | - Ibrahim Al Abdulkareem
- Medical Genomics Research Department, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
| | - Adila Elobeid
- Medical Genomics Research Department, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
| | - Sabine Matou-Nasri
- Healthcare Science Research Institute, Manchester Metropolitan University, Manchester M1 5GD, UK.
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39
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Abstract
Notch signaling is an evolutionarily ancient, highly conserved pathway important for deciding cell fate, cellular development, differentiation, proliferation, apoptosis, adhesion, and epithelial-to-mesenchymal transition. Notch signaling is also critical in mammalian cardiogenesis, as mutations in this signaling pathway are linked to human congenital heart disease. Furthermore, Notch signaling can repair myocardial injury by promoting myocardial regeneration, protecting ischemic myocardium, inducing angiogenesis, and negatively regulating cardiac fibroblast-myofibroblast transformation. This review provides an update on the known roles of Notch signaling in the mammalian heart. The goal is to assist in developing strategies to influence Notch signaling and optimize myocardial injury repair.
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Affiliation(s)
- X.L. Zhou
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang
University, Donghu District, Nanchang, Jiangxi, China
| | - J.C. Liu
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang
University, Donghu District, Nanchang, Jiangxi, China
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40
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Brudno Y, Ennett-Shepard AB, Chen RR, Aizenberg M, Mooney DJ. Enhancing microvascular formation and vessel maturation through temporal control over multiple pro-angiogenic and pro-maturation factors. Biomaterials 2013; 34:9201-9. [PMID: 23972477 PMCID: PMC3811005 DOI: 10.1016/j.biomaterials.2013.08.007] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/02/2013] [Indexed: 12/20/2022]
Abstract
Therapeutic stimulation of angiogenesis to re-establish blood flow in ischemic tissues offers great promise as a treatment for patients suffering from cardiovascular disease or trauma. Since angiogenesis is a complex, multi-step process, different signals may need to be delivered at appropriate times in order to promote a robust and mature vasculature. The effects of temporally regulated presentation of pro-angiogenic and pro-maturation factors were investigated in vitro and in vivo in this study. Pro-angiogenic factors vascular endothelial growth factor (VEGF) and angiopoietin 2 (Ang2) cooperatively promoted endothelial sprouting and pericyte detachment in a three-dimensional in vitro EC-pericyte co-culture model. Pro-maturation factors platelet-derived growth factor B (PDGF) and angiopoietin 1 (Ang1) inhibited the early stages of VEGF- and Ang2-mediated angiogenesis if present simultaneously with VEGF and Ang2, but promoted these behaviors if added subsequently to the pro-angiogenesis factors. VEGF and Ang2 were also found to additively enhance microvessel density in a subcutaneous model of blood vessel formation, while simultaneously administered PDGF/Ang1 inhibited microvessel formation. However, a temporally controlled scaffold that released PDGF and Ang1 at a delay relative to VEGF/Ang2 promoted both vessel maturation and vascular remodeling without inhibiting sprouting angiogenesis. Our results demonstrate the importance of temporal control over signaling in promoting vascular growth, vessel maturation and vascular remodeling. Delivering multiple growth factors in combination and sequence could aid in creating tissue engineered constructs and therapies aimed at promoting healing after acute wounds and in chronic conditions such as diabetic ulcers and peripheral artery disease.
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Affiliation(s)
- Yevgeny Brudno
- School of Engineering and Applied Sciences, Harvard University; Cambridge, MA. 02138
- Wyss Institute for Biological Inspired Engineering, Harvard University; Boston, MA. 02115
| | - Alessandra B. Ennett-Shepard
- School of Engineering and Applied Sciences, Harvard University; Cambridge, MA. 02138
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI. 48109
| | - Ruth R. Chen
- School of Engineering and Applied Sciences, Harvard University; Cambridge, MA. 02138
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI. 48109
| | - Michael Aizenberg
- Wyss Institute for Biological Inspired Engineering, Harvard University; Boston, MA. 02115
| | - David J. Mooney
- School of Engineering and Applied Sciences, Harvard University; Cambridge, MA. 02138
- Wyss Institute for Biological Inspired Engineering, Harvard University; Boston, MA. 02115
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41
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Chappell JC, Mouillesseaux KP, Bautch VL. Flt-1 (vascular endothelial growth factor receptor-1) is essential for the vascular endothelial growth factor-Notch feedback loop during angiogenesis. Arterioscler Thromb Vasc Biol 2013; 33:1952-9. [PMID: 23744993 DOI: 10.1161/atvbaha.113.301805] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVE Vascular endothelial growth factor (VEGF) signaling induces Notch signaling during angiogenesis. Flt-1/VEGF receptor-1 negatively modulates VEGF signaling. Therefore, we tested the hypothesis that disrupted Flt-1 regulation of VEGF signaling causes Notch pathway defects that contribute to dysmorphogenesis of Flt-1 mutant vessels. APPROACH AND RESULTS Wild-type and flt-1(-/-) mouse embryonic stem cell-derived vessels were exposed to pharmacological and protein-based Notch inhibitors with and without added VEGF. Vessel morphology, endothelial cell proliferation, and Notch target gene expression levels were assessed. Similar pathway manipulations were performed in developing vessels of zebrafish embryos. Notch inhibition reduced flt-1(-/-) embryonic stem cell-derived vessel branching dysmorphogenesis and endothelial hyperproliferation, and rescue of flt-1(-/-) vessels was accompanied by a reduction in elevated Notch targets. Surprisingly, wild-type vessel morphogenesis and proliferation were unaffected by Notch suppression, Notch targets in wild-type endothelium were unchanged, and Notch suppression perturbed zebrafish intersegmental vessels but not caudal vein plexuses. In contrast, exogenous VEGF caused wild-type embryonic stem cell-derived vessel and zebrafish intersegmental vessel dysmorphogenesis that was rescued by Notch blockade. CONCLUSIONS Elevated Notch signaling downstream of perturbed VEGF signaling contributes to aberrant flt-1(-/-) blood vessel formation. Notch signaling may be dispensable for blood vessel formation when VEGF signaling is below a critical threshold.
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Affiliation(s)
- John C Chappell
- Department of Biology, The University of North Carolina at Chapel Hill, NC 27599, USA
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42
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Bai Y, Yin G, Huang Z, Liao X, Chen X, Yao Y, Pu X. Localized delivery of growth factors for angiogenesis and bone formation in tissue engineering. Int Immunopharmacol 2013; 16:214-23. [PMID: 23587487 DOI: 10.1016/j.intimp.2013.04.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 04/01/2013] [Accepted: 04/01/2013] [Indexed: 01/14/2023]
Abstract
Angiogenesis is a key component of bone formation. Delivery of growth factors for both angiogenesis and osteogenesis is about to gain important potential as a future therapeutic tool. This review focuses on these growth factors that have dual functions in angiogenesis and osteogenesis, and their localized application. A major hurdle in the clinical development of growth factor therapy so far is how to assure safe and efficacious therapeutic use of such factors and avoid unwanted side effects and toxicity. It is now firmly established from the available information that the type, dose, combinations and delivery kinetics of growth factors all play a decisive role for the success of growth factor therapy. All of these parameters have to be adapted and optimized for each animal model or clinical case. In this review we discuss some important parameters associated with growth factor therapy and present an overview of selected preclinical studies, followed by a conceptual description of both established and proposed delivery strategies meeting therapeutic needs.
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Affiliation(s)
- Yan Bai
- College of Materials Science and Engineering, Sichuan University, Chengdu 610064, PR China
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43
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Abstract
Therapeutic stimulation of vessel growth to improve tissue perfusion has shown promise in many regenerative medicine and tissue engineering applications. Alginate-based biomaterial systems have been investigated for growth factor and/or cell delivery as tools for modulating vessel assembly. Growth factor encapsulation allows for a sustained release of protein and protection from degradation. Implantation of growth factor-loaded alginate constructs typically shows an increase in capillary density but without vascular stabilization. Delivery of multiple factors may improve these outcomes. Cell delivery approaches focus on stimulating vascularization either via cell release of soluble factors, cell proliferation and incorporation into new vessels or alginate prevascularization prior to implantation. These methods have shown some promise but routine clinical application has not been achieved. In this review, current research on the application of alginate for therapeutic neovascularization is presented, shortcomings are addressed and the future direction of these systems discussed.
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44
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Kaigler D, Silva EA, Mooney DJ. Guided bone regeneration using injectable vascular endothelial growth factor delivery gel. J Periodontol 2012; 84:230-8. [PMID: 22668339 DOI: 10.1902/jop.2012.110684] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Vascularization underlies the success of guided bone regeneration (GBR) procedures. This study evaluates the regenerative potential of GBR in combination with vascular endothelial growth factor (VEGF) delivery via an injectable hydrogel system. METHODS Critical-sized defects were created in rat calvariae, and GBR procedures were performed with a collagen membrane alone (control), or plus bolus delivery of VEGF, or plus application of VEGF-releasing hydrogels (VEGF-Alg). Four and 8 weeks after treatment, defect sites were evaluated with microcomputed tomographic and histomorphometric analyses for blood vessel and bone formation. RESULTS At 4 weeks, relative to the control condition, the bolus addition of VEGF did not affect blood vessel density within the defect site, yet the application of VEGF-Alg significantly (P <0.05) increased blood vessel density. Although there was no difference in bone regeneration at 4 weeks, at 8 weeks there was a significant (P <0.05) increase in bone regeneration in the VEGF-Alg-treated defects. CONCLUSIONS These data demonstrate that the application of VEGF-Alg enhanced early angiogenesis, whereas at a later time point, it enhanced bone regeneration. Controlled delivery approaches of angiogenic growth factors used adjunctively with GBR may be a promising strategy for enhancing outcomes of GBR.
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Affiliation(s)
- Darnell Kaigler
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
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45
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Fathi E, Nassiri SM, Atyabi N, Ahmadi SH, Imani M, Farahzadi R, Rabbani S, Akhlaghpour S, Sahebjam M, Taheri M. Induction of angiogenesis via topical delivery of basic-fibroblast growth factor from polyvinyl alcohol-dextran blend hydrogel in an ovine model of acute myocardial infarction. J Tissue Eng Regen Med 2012; 7:697-707. [DOI: 10.1002/term.1460] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Revised: 06/08/2011] [Accepted: 11/29/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Ezzatollah Fathi
- Department of Clinical Sciences; Faculty of Veterinary Medicine, University of Tabriz; Iran
| | - Seyed Mahdi Nassiri
- Department of Clinical Pathology; Faculty of Veterinary Medicine, University of Tehran; Iran
| | - Nahid Atyabi
- Department of Clinical Pathology; Faculty of Veterinary Medicine, University of Tehran; Iran
| | | | - Mohammad Imani
- Novel Drug Delivery Systems Department; Iran Polymer and Petrochemical Institute; Tehran; Iran
| | - Raheleh Farahzadi
- Department of Clinical Biochemistry, Faculty of Medical Sciences; Tarbiat Modares University; Tehran; Iran
| | - Shahram Rabbani
- Tehran Heart Centre; Tehran University of Medical Sciences; Iran
| | - Shahram Akhlaghpour
- Noor Medical Imaging Centre and Sina Hospital; Tehran University of Medical Sciences; Iran
| | | | - Mohammad Taheri
- Rastegar Central Research Laboratory; Faculty of Veterinary Medicine, University of Tehran; Iran
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46
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Gu JW, Rizzo P, Pannuti A, Golde T, Osborne B, Miele L. Notch signals in the endothelium and cancer "stem-like" cells: opportunities for cancer therapy. Vasc Cell 2012; 4:7. [PMID: 22487493 PMCID: PMC3348040 DOI: 10.1186/2045-824x-4-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 04/09/2012] [Indexed: 12/14/2022] Open
Abstract
Anti-angiogenesis agents and the identification of cancer stem-like cells (CSC) are opening new avenues for targeted cancer therapy. Recent evidence indicates that angiogenesis regulatory pathways and developmental pathways that control CSC fate are intimately connected, and that endothelial cells are a key component of the CSC niche. Numerous anti-angiogenic therapies developed so far target the VEGF pathway. However, VEGF-targeted therapy is hindered by clinical resistance and side effects, and new approaches are needed. One such approach may be direct targeting of tumor endothelial cell fate determination. Interfering with tumor endothelial cells growth and survival could inhibit not only angiogenesis but also the self-replication of CSC, which relies on signals from surrounding endothelial cells in the tumor microenvironment. The Notch pathway is central to controlling cell fate both during angiogenesis and in CSC from several tumors. A number of investigational Notch inhibitors are being developed. Understanding how Notch interacts with other factors that control endothelial cell functions and angiogenesis in cancers could pave the way to innovative therapeutic strategies that simultaneously target angiogenesis and CSC.
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Affiliation(s)
- Jian-Wei Gu
- University of Mississippi Cancer Institute, Jackson, MS, USA.
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47
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Skuli N, Majmundar AJ, Krock BL, Mesquita RC, Mathew LK, Quinn ZL, Runge A, Liu L, Kim MN, Liang J, Schenkel S, Yodh AG, Keith B, Simon MC. Endothelial HIF-2α regulates murine pathological angiogenesis and revascularization processes. J Clin Invest 2012; 122:1427-43. [PMID: 22426208 PMCID: PMC3314446 DOI: 10.1172/jci57322] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 02/03/2012] [Indexed: 12/12/2022] Open
Abstract
Localized tissue hypoxia is a consequence of vascular compromise or rapid cellular proliferation and is a potent inducer of compensatory angiogenesis. The oxygen-responsive transcriptional regulator hypoxia-inducible factor 2α (HIF-2α) is highly expressed in vascular ECs and, along with HIF-1α, activates expression of target genes whose products modulate vascular functions and angiogenesis. However, the mechanisms by which HIF-2α regulates EC function and tissue perfusion under physiological and pathological conditions are poorly understood. Using mice in which Hif2a was specifically deleted in ECs, we demonstrate here that HIF-2α expression is required for angiogenic responses during hindlimb ischemia and for the growth of autochthonous skin tumors. EC-specific Hif2a deletion resulted in increased vessel formation in both models; however, these vessels failed to undergo proper arteriogenesis, resulting in poor perfusion. Analysis of cultured HIF-2α-deficient ECs revealed cell-autonomous increases in migration, invasion, and morphogenetic activity, which correlated with HIF-2α-dependent expression of specific angiogenic factors, including delta-like ligand 4 (Dll4), a Notch ligand, and angiopoietin 2. By stimulating Dll4 signaling in cultured ECs or restoring Dll4 expression in ischemic muscle tissue, we rescued most of the HIF-2α-dependent EC phenotypes in vitro and in vivo, emphasizing the critical role of Dll4/Notch signaling as a downstream target of HIF-2α in ECs. These results indicate that HIF-1α and HIF-2α fulfill complementary, but largely nonoverlapping, essential functions in pathophysiological angiogenesis.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Angiopoietin-2/genetics
- Angiopoietin-2/physiology
- Animals
- Basic Helix-Loop-Helix Transcription Factors/deficiency
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/physiology
- Calcium-Binding Proteins
- Cell Hypoxia
- Cell Movement
- Cells, Cultured/cytology
- Collateral Circulation/physiology
- Endothelial Cells/metabolism
- Hindlimb/blood supply
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/physiology
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/physiology
- Ischemia/physiopathology
- Membrane Proteins/genetics
- Membrane Proteins/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Neovascularization, Pathologic/physiopathology
- Neovascularization, Physiologic/physiology
- Receptors, Notch/physiology
- Recombinant Fusion Proteins/physiology
- Recovery of Function
- Skin Neoplasms/blood supply
- Skin Neoplasms/chemically induced
- Wound Healing/physiology
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Affiliation(s)
- Nicolas Skuli
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Amar J. Majmundar
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bryan L. Krock
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Rickson C. Mesquita
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Lijoy K. Mathew
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zachary L. Quinn
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Anja Runge
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Liping Liu
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Meeri N. Kim
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jiaming Liang
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Steven Schenkel
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Arjun G. Yodh
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Brian Keith
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - M. Celeste Simon
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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48
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Li Y, Rodrigues J, Tomás H. Injectable and biodegradable hydrogels: gelation, biodegradation and biomedical applications. Chem Soc Rev 2012; 41:2193-221. [PMID: 22116474 DOI: 10.1039/c1cs15203c] [Citation(s) in RCA: 955] [Impact Index Per Article: 79.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Injectable hydrogels with biodegradability have in situ formability which in vitro/in vivo allows an effective and homogeneous encapsulation of drugs/cells, and convenient in vivo surgical operation in a minimally invasive way, causing smaller scar size and less pain for patients. Therefore, they have found a variety of biomedical applications, such as drug delivery, cell encapsulation, and tissue engineering. This critical review systematically summarizes the recent progresses on biodegradable and injectable hydrogels fabricated from natural polymers (chitosan, hyaluronic acid, alginates, gelatin, heparin, chondroitin sulfate, etc.) and biodegradable synthetic polymers (polypeptides, polyesters, polyphosphazenes, etc.). The review includes the novel naturally based hydrogels with high potential for biomedical applications developed in the past five years which integrate the excellent biocompatibility of natural polymers/synthetic polypeptides with structural controllability via chemical modification. The gelation and biodegradation which are two key factors to affect the cell fate or drug delivery are highlighted. A brief outlook on the future of injectable and biodegradable hydrogels is also presented (326 references).
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Affiliation(s)
- Yulin Li
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada 9020-105 Funchal, Portugal.
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49
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Lee K, Silva EA, Mooney DJ. Growth factor delivery-based tissue engineering: general approaches and a review of recent developments. J R Soc Interface 2011; 8:153-70. [PMID: 20719768 PMCID: PMC3033020 DOI: 10.1098/rsif.2010.0223] [Citation(s) in RCA: 908] [Impact Index Per Article: 69.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 07/29/2010] [Indexed: 12/23/2022] Open
Abstract
The identification and production of recombinant morphogens and growth factors that play key roles in tissue regeneration have generated much enthusiasm and numerous clinical trials, but the results of many of these trials have been largely disappointing. Interestingly, the trials that have shown benefit all contain a common denominator, the presence of a material carrier, suggesting strongly that spatio-temporal control over the location and bioactivity of factors after introduction into the body is crucial to achieve tangible therapeutic effect. Sophisticated materials systems that regulate the biological presentation of growth factors represent an attractive new generation of therapeutic agents for the treatment of a wide variety of diseases. This review provides an overview of growth factor delivery in tissue engineering. Certain fundamental issues and design strategies relevant to the material carriers that are being actively pursued to address specific technical objectives are discussed. Recent progress highlights the importance of materials science and engineering in growth factor delivery approaches to regenerative medicine.
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Affiliation(s)
- Kangwon Lee
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02139, USA
| | - Eduardo A. Silva
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02139, USA
| | - David J. Mooney
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02139, USA
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50
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Mac Gabhann F, Qutub AA, Annex BH, Popel AS. Systems biology of pro-angiogenic therapies targeting the VEGF system. WILEY INTERDISCIPLINARY REVIEWS. SYSTEMS BIOLOGY AND MEDICINE 2010; 2:694-707. [PMID: 20890966 PMCID: PMC2990677 DOI: 10.1002/wsbm.92] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Vascular endothelial growth factor (VEGF) is a family of cytokines for which the dysregulation of expression is involved in many diseases; for some, excess VEGF causes pathological hypervascularization, while for others VEGF-induced vascular remodeling may alleviate ischemia and/or hypoxia. Anti-angiogenic therapies attacking the VEGF pathway have begun to live up to their promise for treatment of certain cancers and of age-related macular degeneration. However, the corollary is not yet true: in coronary artery disease and peripheral artery disease, clinical trials of pro-angiogenic VEGF delivery have not, so far, proven successful. The VEGF and VEGF-receptor system is complex, with at least five ligand genes, some encoding multiple protein isoforms and five receptor genes. A systems biology approach for designing pro-angiogenic therapies, using a combination of quantitative experimental approaches and detailed computational models, is essential to deal with this complexity and to understand the effects of drugs targeting the system. This approach allows us to learn from unsuccessful clinical trials and to design and test novel single therapeutics or combinations of therapeutics. Among the parameters that can be varied in order to determine optimal strategy are dosage, timing of multiple doses, route of administration, and the molecular target.
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Affiliation(s)
- Feilim Mac Gabhann
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21218
| | - Amina A Qutub
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Brian H Annex
- Division of Cardiovascular Medicine, Department of Medicine and Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Aleksander S Popel
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205
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