1
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Yoshida Y, Takeda Y, Yamahara K, Yamamoto H, Takagi T, Kuramoto Y, Nakano-Doi A, Nakagomi T, Soma T, Matsuyama T, Doe N, Yoshimura S. Enhanced angiogenic properties of umbilical cord blood primed by OP9 stromal cells ameliorates neurological deficits in cerebral infarction mouse model. Sci Rep 2023; 13:262. [PMID: 36609640 PMCID: PMC9822952 DOI: 10.1038/s41598-023-27424-7] [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: 09/15/2022] [Accepted: 12/29/2022] [Indexed: 01/09/2023] Open
Abstract
Umbilical cord blood (UCB) transplantation shows proangiogenic effects and contributes to symptom amelioration in animal models of cerebral infarction. However, the effect of specific cell types within a heterogeneous UCB population are still controversial. OP9 is a stromal cell line used as feeder cells to promote the hematoendothelial differentiation of embryonic stem cells. Hence, we investigated the changes in angiogenic properties, underlying mechanisms, and impact on behavioral deficiencies caused by cerebral infarction in UCB co-cultured with OP9 for up to 24 h. In the network formation assay, only OP9 pre-conditioned UCB formed network structures. Single-cell RNA sequencing and flow cytometry analysis showed a prominent phenotypic shift toward M2 in the monocytic fraction of OP9 pre-conditioned UCB. Further, OP9 pre-conditioned UCB transplantation in mice models of cerebral infarction facilitated angiogenesis in the peri-infarct lesions and ameliorated the associated symptoms. In this study, we developed a strong, fast, and feasible method to augment the M2, tissue-protecting, pro-angiogenic features of UCB using OP9. The ameliorative effect of OP9-pre-conditioned UCB in vivo could be partly due to promotion of innate angiogenesis in peri-infarct lesions.
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Affiliation(s)
- Yasunori Yoshida
- grid.272264.70000 0000 9142 153XDepartment of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Yuki Takeda
- grid.272264.70000 0000 9142 153XDepartment of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Kenichi Yamahara
- Laboratory of Molecular and Cellular Therapy, Institute for Advanced Medical Sciences, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo, 663-8501, Japan.
| | - Hanae Yamamoto
- grid.272264.70000 0000 9142 153XLaboratory of Molecular and Cellular Therapy, Institute for Advanced Medical Sciences, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Toshinori Takagi
- grid.272264.70000 0000 9142 153XDepartment of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Yoji Kuramoto
- grid.272264.70000 0000 9142 153XDepartment of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Akiko Nakano-Doi
- Laboratory of Neurogenesis and CNS Repair, Institute for Advanced Medical Sciences, Hyogo Medial University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Takayuki Nakagomi
- Laboratory of Neurogenesis and CNS Repair, Institute for Advanced Medical Sciences, Hyogo Medial University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Toshihiro Soma
- grid.272264.70000 0000 9142 153XDepartment of Hematology, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Tomohiro Matsuyama
- grid.272264.70000 0000 9142 153XDepartment of Therapeutic Progress in Brain Diseases, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
| | - Nobutaka Doe
- Laboratory of Neurogenesis and CNS Repair, Institute for Advanced Medical Sciences, Hyogo Medial University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan ,grid.272264.70000 0000 9142 153XDepartment of Occupational Therapy, School of Rehabilitation, Hyogo Medical University, 1-3-6 Minatojima, Chuo-Ku, Kobe, Hyogo 650-8530 Japan
| | - Shinichi Yoshimura
- grid.272264.70000 0000 9142 153XDepartment of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya, Hyogo 663-8501 Japan
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2
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Puebla M, Tapia PJ, Espinoza H. Key Role of Astrocytes in Postnatal Brain and Retinal Angiogenesis. Int J Mol Sci 2022; 23:ijms23052646. [PMID: 35269788 PMCID: PMC8910249 DOI: 10.3390/ijms23052646] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 01/27/2023] Open
Abstract
Angiogenesis is a key process in various physiological and pathological conditions in the nervous system and in the retina during postnatal life. Although an increasing number of studies have addressed the role of endothelial cells in this event, the astrocytes contribution in angiogenesis has received less attention. This review is focused on the role of astrocytes as a scaffold and in the stabilization of the new blood vessels, through different molecules release, which can modulate the angiogenesis process in the brain and in the retina. Further, differences in the astrocytes phenotype are addressed in glioblastoma, one of the most devastating types of brain cancer, in order to provide potential targets involved in the cross signaling between endothelial cells, astrocytes and glioma cells, that mediate tumor progression and pathological angiogenesis. Given the relevance of astrocytes in angiogenesis in physiological and pathological conditions, future studies are required to better understand the interrelation between endothelial and astrocyte signaling pathways during this process.
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Affiliation(s)
- Mariela Puebla
- Centro de Fisiología Celular e Integrativa, Facultad de Medicina-Clínica Alemana, Universidad del Desarrollo, Av. Plaza 680, Las Condes, Santiago 7550000, Chile;
| | - Pablo J. Tapia
- Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Av. Lota 2465, Providencia, Santiago 7500000, Chile;
- Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Av. República 71, Santiago 8320000, Chile
| | - Hilda Espinoza
- Facultad de Ciencias de la Salud, Universidad del Alba, Av. Ejército Libertador 171, Santiago 8320000, Chile
- Correspondence:
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3
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Yang H, Luo Y, Hu H, Yang S, Li Y, Jin H, Chen S, He Q, Hong C, Wu J, Wan Y, Li M, Li Z, Yang X, Su Y, Zhou Y, Hu B. pH-Sensitive, Cerebral Vasculature-Targeting Hydroxyethyl Starch Functionalized Nanoparticles for Improved Angiogenesis and Neurological Function Recovery in Ischemic Stroke. Adv Healthc Mater 2021; 10:e2100028. [PMID: 34028998 DOI: 10.1002/adhm.202100028] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/16/2021] [Indexed: 01/17/2023]
Abstract
Angiogenesis, an essential restorative process following ischemia, is a promising therapeutic approach to improve neurological deficits. However, overcoming the blood-brain barrier (BBB) and effective drug enrichment are challenges for conventional drug delivery methods, which has limited the development of treatment strategies. Herein, a dual-targeted therapeutic strategy is reported to enable pH-sensitive drug release and allow cerebral ischemia targeting to improve stroke therapeutic efficacy. Targeted delivery is achieved by surface conjugation of Pro-His-Ser-Arg-Asn (PHSRN) peptides, which binds to integrin α5 β1 enriched in the cerebral vasculature of ischemic tissue. Subsequently, smoothened agonist (SAG), an activator of sonic hedgehog (Shh) signaling, is coupled to PHSRN-HES by pH-dependent electrostatic adsorption. SAG@PHSRN-HES nanoparticles can sensitively release more SAG in the acidic environment of ischemic brain tissue. More importantly, SAG@PHSRN-HES exerts the synergistic mechanisms of PHSRN and SAG to promote angiogenesis and BBB integrity, thus improving neuroplasticity and neurological function recovery. This study proposes a new approach to improve the delivery of medications in the ischemic brain. Dual-targeted therapeutic strategies have excellent potential to treat patients suffering from cerebral infarction.
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Affiliation(s)
- Hang Yang
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Yan Luo
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Hang Hu
- School of Pharmacy Changzhou University Changzhou 213164 P. R. China
| | - Sibo Yang
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Yanan Li
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Huijuan Jin
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Shengcai Chen
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Quanwei He
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Candong Hong
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Jiehong Wu
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Yan Wan
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Man Li
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Zifu Li
- National Engineering Research Center for Nanomedicine College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China
| | - Xiangliang Yang
- National Engineering Research Center for Nanomedicine College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China
| | - Ying Su
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Yifan Zhou
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
| | - Bo Hu
- Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China
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4
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Michalski D, Spielvogel E, Puchta J, Reimann W, Barthel H, Nitzsche B, Mages B, Jäger C, Martens H, Horn AKE, Schob S, Härtig W. Increased Immunosignals of Collagen IV and Fibronectin Indicate Ischemic Consequences for the Neurovascular Matrix Adhesion Zone in Various Animal Models and Human Stroke Tissue. Front Physiol 2020; 11:575598. [PMID: 33192578 PMCID: PMC7649770 DOI: 10.3389/fphys.2020.575598] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/23/2020] [Indexed: 12/21/2022] Open
Abstract
Ischemic stroke causes cellular alterations in the “neurovascular unit” (NVU) comprising neurons, glia, and the vasculature, and affects the blood-brain barrier (BBB) with adjacent extracellular matrix (ECM). Limited data are available for the zone between the NVU and ECM that has not yet considered for neuroprotective approaches. This study describes ischemia-induced alterations for two main components of the neurovascular matrix adhesion zone (NMZ), i.e., collagen IV as basement membrane constituent and fibronectin as crucial part of the ECM, in conjunction with traditional NVU elements. For spatio-temporal characterization of these structures, multiple immunofluorescence labeling was applied to tissues affected by focal cerebral ischemia using a filament-based model in mice (4, 24, and 72 h of ischemia), a thromboembolic model in rats (24 h of ischemia), a coagulation-based model in sheep (2 weeks of ischemia), and human autoptic stroke tissue (3 weeks of ischemia). An increased fibronectin immunofluorescence signal demarcated ischemia-affected areas in mice, along with an increased collagen IV signal and BBB impairment indicated by serum albumin extravasation. Quantifications revealed a region-specific pattern with highest collagen IV and fibronectin intensities in most severely affected neocortical areas, followed by a gradual decline toward the border zone and non-affected regions. Comparing 4 and 24 h of ischemia, the subcortical fibronectin signal increased significantly over time, whereas neocortical areas displayed only a gradual increase. Qualitative analyses confirmed increased fibronectin and collagen IV signals in ischemic areas from all tissues and time points investigated. While the increased collagen IV signal was restricted to vessels, fibronectin appeared diffusely arranged in the parenchyma with focal accumulations associated to the vasculature. Integrin α5 appeared enriched in the vicinity of fibronectin and vascular elements, while most of the non-vascular NVU elements showed complementary staining patterns referring to fibronectin. This spatio-temporal characterization of ischemia-related alterations of collagen IV and fibronectin in various stroke models and human autoptic tissue shows that ischemic consequences are not limited to traditional NVU components and the ECM, but also involve the NMZ. Future research should explore more components and the pathophysiological properties of the NMZ as a possible target for novel neuroprotective approaches.
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Affiliation(s)
| | - Emma Spielvogel
- Department of Neurology, University of Leipzig, Leipzig, Germany.,Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - Joana Puchta
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany.,Department of Neuroradiology, University of Leipzig, Leipzig, Germany
| | - Willi Reimann
- Department of Neurology, University of Leipzig, Leipzig, Germany.,Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - Henryk Barthel
- Department of Nuclear Medicine, University of Leipzig, Leipzig, Germany
| | - Björn Nitzsche
- Department of Nuclear Medicine, University of Leipzig, Leipzig, Germany.,Institute of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Bianca Mages
- Institute of Anatomy, University of Leipzig, Leipzig, Germany
| | - Carsten Jäger
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | | | - Anja K E Horn
- Institute of Anatomy and Cell Biology I and German Center for Vertigo and Balance Disorders, Ludwig-Maximilians-University, Munich, Germany
| | - Stefan Schob
- Department of Neuroradiology, University of Leipzig, Leipzig, Germany
| | - Wolfgang Härtig
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
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5
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Edwards DN, Salmeron K, Lukins DE, Trout AL, Fraser JF, Bix GJ. Integrin α5β1 inhibition by ATN-161 reduces neuroinflammation and is neuroprotective in ischemic stroke. J Cereb Blood Flow Metab 2020; 40:1695-1708. [PMID: 31575337 PMCID: PMC7370357 DOI: 10.1177/0271678x19880161] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Stroke remains a leading cause of death and disability with limited therapeutic options. Endothelial cell β1 integrin receptors play a direct role in blood-brain barrier (BBB) dysfunction through regulation of tight junction proteins and infiltrating leukocytes, potentially mediated by β1 integrins. Following tandem transient common carotid artery/middle cerebral artery occlusion on wild-type mice, we administered the integrin a5b1 inhibitor, ATN-161, intraperitoneal (IP) injection at 1 mg/kg acutely after reperfusion, on post-stroke day (PSD)1 and PSD2. Systemic changes (heart rate, pulse distension, and body temperature) were determined. Additionally, infarct volume and edema were determined by 2,3-triphenyltetrazolium chloride and magnetic resonance imaging, while neurological changes were evaluated using an 11-point Neuroscore. Brain immunohistochemistry was performed for claudin-5, α5β1, IgG, and CD45 + cells, and quantitative polymerase chain reaction (qPCR) was performed for matrix metalloproteinase-9 (MMP-9), interleukin (IL)-1β, collagen IV, and CXCL12. ATN-161 significantly reduced integrin α5β1 expression in the surrounding peri-infarct region with no systemic changes. Infarct volume, edema, and functional deficit were significantly reduced in ATN-161-treated mice. Furthermore, ATN-161 treatment reduced IgG extravasation into the parenchyma through conserved claudin-5, collagen IV, CXCL12 while reducing MMP-9 transcription. Additionally, IL-1β and CD45 + cells were reduced in the ipsilateral cortex following ATN-161 administration. Collectively, ATN-161 may be a promising novel stroke therapy by reducing post-stroke inflammation and BBB permeability.
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Affiliation(s)
| | - Kathleen Salmeron
- Department of Neuroscience, University of Kentucky, Lexington, USA.,Department of Physiology, University of Kentucky, Lexington, USA
| | | | - Amanda L Trout
- Department of Neurology, University of Kentucky, Lexington, USA
| | - Justin F Fraser
- Department of Neuroscience, University of Kentucky, Lexington, USA.,Department of Radiology, University of Kentucky, Lexington, USA.,Department of Neurology, University of Kentucky, Lexington, USA.,Department of Neurosurgery, University of Kentucky, Lexington, USA.,Center for Advanced Translational Stroke Science, University of Kentucky, Lexington, USA
| | - Gregory J Bix
- Department of Neuroscience, University of Kentucky, Lexington, USA.,Department of Neurology, University of Kentucky, Lexington, USA.,Department of Neurosurgery, University of Kentucky, Lexington, USA.,Center for Advanced Translational Stroke Science, University of Kentucky, Lexington, USA.,Sanders-Brown Center on Aging, University of Kentucky, Lexington, USA
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6
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Howe MD, Furr JW, Munshi Y, Roy-O’Reilly MA, Maniskas ME, Koellhoffer EC, d’Aigle J, Sansing LH, McCullough LD, Urayama A. Transforming growth factor-β promotes basement membrane fibrosis, alters perivascular cerebrospinal fluid distribution, and worsens neurological recovery in the aged brain after stroke. GeroScience 2019; 41:543-559. [PMID: 31721012 PMCID: PMC6885082 DOI: 10.1007/s11357-019-00118-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 10/04/2019] [Indexed: 12/14/2022] Open
Abstract
Aging and stroke alter the composition of the basement membrane and reduce the perivascular distribution of cerebrospinal fluid and solutes, which may contribute to poor functional recovery in elderly patients. Following stroke, TGF-β induces astrocyte activation and subsequent glial scar development. This is dysregulated with aging and could lead to chronic, detrimental changes within the basement membrane. We hypothesized that TGF-β induces basement membrane fibrosis after stroke, leading to impaired perivascular CSF distribution and poor functional recovery in aged animals. We found that CSF entered the aged brain along perivascular tracts; this process was reduced by experimental stroke and was rescued by TGF-β receptor inhibition. Brain fibronectin levels increased with experimental stroke, which was reversed with inhibitor treatment. Exogenous TGF-β stimulation increased fibronectin expression, both in vivo and in primary cultured astrocytes. Oxygen-glucose deprivation of cultured astrocytes induced multiple changes in genes related to astrocyte activation and extracellular matrix production. Finally, in stroke patients, we found that serum TGF-β levels correlated with poorer functional outcomes, suggesting that serum levels may act as a biomarker for functional recovery. These results support a potential new treatment strategy to enhance recovery in elderly stroke patients.
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Affiliation(s)
- Matthew D. Howe
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - J. Weldon Furr
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Yashasvee Munshi
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Meaghan A. Roy-O’Reilly
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Michael E. Maniskas
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Edward C. Koellhoffer
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - John d’Aigle
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Lauren H. Sansing
- Department of Neurology, Yale University School of Medicine, 1450 Chapel Street, New Haven, CT 06511 USA
| | - Louise D. McCullough
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
| | - Akihiko Urayama
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin St., Houston, TX 77030 USA
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7
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Howe MD, Atadja LA, Furr JW, Maniskas ME, Zhu L, McCullough LD, Urayama A. Fibronectin induces the perivascular deposition of cerebrospinal fluid-derived amyloid-β in aging and after stroke. Neurobiol Aging 2018; 72:1-13. [PMID: 30172921 PMCID: PMC6219378 DOI: 10.1016/j.neurobiolaging.2018.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 07/19/2018] [Accepted: 07/26/2018] [Indexed: 11/21/2022]
Abstract
Cerebral amyloid angiopathy occurs after stroke, but the mechanism underlying the initial amyloid-β deposition is not fully understood. This study investigates whether overexpression of fibronectin and its receptor, integrin-α5, induces the perivascular deposition of cerebrospinal fluid-derived amyloid-β after stroke in young and aged animals. We found that stroke impaired the bulk flow of cerebrospinal fluid into the brain parenchyma and further showed that perivascular amyloid-β deposition was enhanced in aged animals with stroke, which colocalized with integrin-α5 in the basement membrane. Furthermore, we found that stroke dramatically increased the cortical levels of fibronectin and integrin-α5, with further increases in integrin-α5 in aged animals with stroke, fibronectin bound amyloid-β in vitro, and fibronectin administration increased amyloid-β deposition in vivo. Finally, aging and stroke impaired performance on the Barnes maze. These results indicate that fibronectin induces the perivascular deposition of amyloid-β and that increased integrin-α5 further "primes" the aged brain for amyloid-β binding. This provides a novel molecular and physiological mechanism for perivascular amyloid-β deposition after stroke, particularly in aged individuals.
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Affiliation(s)
- Matthew D Howe
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Louise A Atadja
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - J Weldon Furr
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Michael E Maniskas
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Liang Zhu
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Louise D McCullough
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Akihiko Urayama
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA.
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8
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Edwards DN, Bix GJ. Roles of blood-brain barrier integrins and extracellular matrix in stroke. Am J Physiol Cell Physiol 2018; 316:C252-C263. [PMID: 30462535 DOI: 10.1152/ajpcell.00151.2018] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ischemicstroke is a leading cause of death and disability in the United States, but recent advances in treatments [i.e., endovascular thrombectomy and tissue plasminogen activator (t-PA)] that target the stroke-causing blood clot, while improving overall stroke mortality rates, have had much less of an impact on overall stroke morbidity. This may in part be attributed to the lack of therapeutics targeting reperfusion-induced injury after the blood clot has been removed, which, if left unchecked, can expand injury from its core into the surrounding at risk tissue (penumbra). This occurs in two phases of increased permeability of the blood-brain barrier, a physical barrier that under physiologic conditions regulates brain influx and efflux of substances and consists of tight junction forming endothelial cells (and transporter proteins), astrocytes, pericytes, extracellular matrix, and their integrin cellular receptors. During, embryonic development, maturity, and following stroke reperfusion, cerebral vasculature undergoes significant changes including changes in expression of integrins and degradation of surrounding extracellular matrix. Integrins, heterodimers with α and β subunits, and their extracellular matrix ligands, a collection of proteoglycans, glycoproteins, and collagens, have been modestly studied in the context of stroke compared with other diseases (e.g., cancer). In this review, we describe the effect that various integrins and extracellular matrix components have in embryonic brain development, and how this changes in both maturity and in the poststroke environment. Particular focus will be on how these changes in integrins and the extracellular matrix affect blood-brain barrier components and their potential as diagnostic and therapeutic targets for ischemic stroke.
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Affiliation(s)
- Danielle N Edwards
- Sanders-Brown Center on Aging, University of Kentucky , Lexington, Kentucky.,Department of Neuroscience, University of Kentucky , Lexington, Kentucky
| | - Gregory J Bix
- Sanders-Brown Center on Aging, University of Kentucky , Lexington, Kentucky.,Department of Neuroscience, University of Kentucky , Lexington, Kentucky.,Department of Neurology, University of Kentucky , Lexington, Kentucky.,Department of Neurosurgery, University of Kentucky , Lexington, Kentucky
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9
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Integrin α5β1-Ang1/Tie2 receptor cross-talk regulates brain endothelial cell responses following cerebral ischemia. Exp Mol Med 2018; 50:1-12. [PMID: 30185785 PMCID: PMC6123805 DOI: 10.1038/s12276-018-0145-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 04/06/2018] [Accepted: 05/14/2018] [Indexed: 11/08/2022] Open
Abstract
We have previously demonstrated that in response to cerebral ischemia (CI), the growth factor angiopoietin-1 (Ang1) and α5β1 integrin are both induced in cerebral vessels, which likely provide positive signals driving the endogenous angiogenic response and vascular protection after CI. However, the precise relationship between endothelial Ang1 and α5β1 integrin after CI remains poorly understood. Here, we investigated the effects of the interaction between the Ang1/Tie2 system and α5β1 integrin on brain endothelial cells (BECs) under cerebral ischemic conditions in vivo and in vitro. Immunofluorescence analysis demonstrated that integrin α5β1 co-localized with Tie2/phosphorylated Tie2 on cerebral vessels in the penumbra. The in vitro study showed that oxygen-glucose deprivation/restoration (OGD/R) induced the expression of the Ang1 receptor Tie2 on BECs in a manner similar to that for integrin α5 and Ang1 in response to OGD/R, accompanied by increased activation of Tie2 and its downstream effectors focal adhesion kinase (FAK) and Akt. Knockdown of α5 integrin markedly suppressed OGD/R-induced Tie2 receptor activation in BECs, while in contrast, priming BECs with Ang1 promoted the expression of α5 integrin as well as the Tie2 downstream transcription factor Ets-1 in OGD-treated BECs. In line with this, Ets-1 knockdown significantly attenuated Ang1-mediated upregulation of α5 integrin. Functionally, Ang1 induced cell migration and tube formation of BECs after OGD, but this effect was inhibited by diminishment of the levels of α5 integrin in BECs. Taken together, our data indicate that the Ang1/Tie2 system cross-talks with integrin α5β1 in BECs after CI, which may contribute to the endogenous angiogenic vascular protective response following CI.
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10
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Huang H, Huang Q, Wang F, Milner R, Li L. Cerebral ischemia-induced angiogenesis is dependent on tumor necrosis factor receptor 1-mediated upregulation of α5β1 and αVβ3 integrins. J Neuroinflammation 2016; 13:227. [PMID: 27586239 PMCID: PMC5009537 DOI: 10.1186/s12974-016-0697-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/20/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The pro-inflammatory cytokine, tumor necrosis factor-α (TNF-α), is expressed in ischemic tissue and is known to modulate angiogenesis; however, the role of the two distinct TNF-α receptors, TNFR1 and TNFR2, in mediating angiogenic signaling after cerebral ischemic stroke is relatively unknown. METHODS C57BL6 mice were subject to 90 min of ischemia by temporary occlusion of the middle cerebral artery (MCAO) and given daily intra-cerebroventricular injections of antibodies against TNFR1, TNFR2 or control IgG (doses of 10, 50, and 100 ng/day) for 4 days following 90 min MCAO. Vascular remodeling and α5β1 and αVβ3 integrin expression were then examined in the brains of these mice after 4, 7, and 14 days post-ischemia. In parallel in vitro studies, flow cytometry was used to determine the influence of TNF-α on proliferation and integrin expression of human brain microvascular endothelial cells (HBMECs). RESULTS The post-ischemic cerebral angiogenic response was inhibited by antibodies against TNFR1 but not TNFR2, and this correlated with reduced endothelial proliferation and decreased α5β1 and αVβ3 integrin expression after 4 and 7 days post-ischemia. Consistent with these findings, in vitro studies showed that TNF-α induced endothelial proliferation and upregulation of α5β1 and αVβ3 integrins was abrogated by anti-TNFR1 but not anti-TNFR2 antibodies in cultured HBMECs. In addition, blocking antibodies to α5β1 and αVβ3 integrins significantly inhibited TNF-α-induced HBMEC proliferation. CONCLUSIONS Our results suggest that TNFR1-mediated signaling plays a critical role in triggering angiogenic integrins and subsequent angiogenic responses following cerebral ischemia. These novel findings could form a platform for future therapeutic strategies aimed at stimulating angiogenesis following cerebral ischemia.
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Affiliation(s)
- Heng Huang
- Department of Neurology, Guangdong Medical University Affiliated Hospital, Zhanjiang, 524001, People's Republic of China
| | - Qijuan Huang
- Department of Neurology, Guangdong Medical University Affiliated Hospital, Zhanjiang, 524001, People's Republic of China
| | - Fuxin Wang
- Department of Neurology, Guangdong Medical University Affiliated Hospital, Zhanjiang, 524001, People's Republic of China
| | - Richard Milner
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.
| | - Longxuan Li
- Department of Neurology, Gongli Hospital, 219 Miaopu Road, Pudong New Area, Shanghai, 200135, People's Republic of China. .,Department of Neurology, Guangdong Medical University Affiliated Hospital, Zhanjiang, 524001, People's Republic of China.
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