1
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Okada Y. Potential Therapeutic Strategies and Drugs That Target Vascular Permeability in Severe Infectious Diseases. Biol Pharm Bull 2024; 47:549-555. [PMID: 38432910 DOI: 10.1248/bpb.b24-00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Severe infection pathogenicity is induced by processes such as pathogen exposure, immune cell activation, inflammatory cytokine production, and vascular hyperpermeability. Highly effective drugs, such as antipathogenic agents, steroids, and antibodies that suppress cytokine function, have been developed to treat the first three processes. However, these drugs cannot completely suppress severe infectious diseases, such as coronavirus disease 2019 (COVID-19). Therefore, developing novel drugs that inhibit vascular hyperpermeability is crucial. This review summarizes the mechanisms of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-induced vascular hyperpermeability and identifies inhibitors that increase endothelial cell (EC) junction-related proteins and determines their efficacy in COVID-19 and endotoxemia models. Analyzing the effects of SARS-CoV-2 on vascular permeability revealed that SARS-CoV-2 suppresses Claudin-5 (CLDN5) expression, which is responsible for adhesion between ECs, thereby increasing vascular permeability. Inhibiting CLDN5 function in mice induced vascular hyperpermeability and pulmonary edema. In contrast, Enhancing CLDN5 expression suppressed SARS-CoV-2-induced endothelial hyperpermeability, suggesting that SARS-CoV-2-induced vascular hyperpermeability contributes to pathological progression, which can be suppressed by upregulating EC junction proteins. Based on these results, we focused on Roundabout4 (Robo4), another EC-specific protein that stabilizes EC junctions. EC-specific Robo4 overexpression suppressed vascular hyperpermeability and mortality in lipopolysaccharide-treated mice. An ALK1 inhibitor (a molecule that increases Robo4 expression), suppressed vascular hyperpermeability and mortality in lipopolysaccharide- and SARS-CoV-2-treated mice. These results indicate that Robo4 expression-increasing drugs suppress vascular permeability and pathological phenotype in COVID-19 and endotoxemia models.
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Affiliation(s)
- Yoshiaki Okada
- Graduate School of Pharmaceutical Sciences, Osaka University
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2
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Noh B, Blasco‐Conesa MP, Rahman SM, Monga S, Ritzel R, Guzman G, Lai Y, Ganesh BP, Urayama A, McCullough LD, Moruno‐Manchon JF. Iron overload induces cerebral endothelial senescence in aged mice and in primary culture in a sex-dependent manner. Aging Cell 2023; 22:e13977. [PMID: 37675802 PMCID: PMC10652299 DOI: 10.1111/acel.13977] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 08/13/2023] [Accepted: 08/16/2023] [Indexed: 09/08/2023] Open
Abstract
Iron imbalance in the brain negatively affects brain function. With aging, iron levels increase in the brain and contribute to brain damage and neurological disorders. Changes in the cerebral vasculature with aging may enhance iron entry into the brain parenchyma, leading to iron overload and its deleterious consequences. Endothelial senescence has emerged as an important contributor to age-related changes in the cerebral vasculature. Evidence indicates that iron overload may induce senescence in cultured cell lines. Importantly, cells derived from female human and mice generally show enhanced senescence-associated phenotype, compared with males. Thus, we hypothesize that cerebral endothelial cells (CEC) derived from aged female mice are more susceptible to iron-induced senescence, compared with CEC from aged males. We found that aged female mice, but not males, showed cognitive deficits when chronically treated with ferric citrate (FC), and their brains and the brain vasculature showed senescence-associated phenotype. We also found that primary culture of CEC derived from aged female mice, but not male-derived CEC, exhibited senescence-associated phenotype when treated with FC. We identified that the transmembrane receptor Robo4 was downregulated in the brain vasculature and in cultured primary CEC derived from aged female mice, compared with those from male mice. We discovered that Robo4 downregulation contributed to enhanced vulnerability to FC-induced senescence. Thus, our study identifies Robo4 downregulation as a driver of senescence induced by iron overload in primary culture of CEC and a potential risk factor of brain vasculature impairment and brain dysfunction.
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Affiliation(s)
- Brian Noh
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Maria Pilar Blasco‐Conesa
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Syed Mushfiqur Rahman
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Sheelu Monga
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Rodney Ritzel
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Gary Guzman
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Yun‐Ju Lai
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
- Solomont School of NursingZuckerberg College of Health SciencesUniversity of Massachusetts LowellLowellMassachusettsUSA
| | - Bhanu Priya Ganesh
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Akihiko Urayama
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Louise D. McCullough
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
| | - Jose Felix Moruno‐Manchon
- Department of NeurologyMcGovern Medical School at the University of Texas Health Science Center at HoustonHoustonTexasUSA
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3
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Tsitsikov EN, Phan KP, Liu Y, Tsytsykova AV, Kinter M, Selland L, Garman L, Griffin C, Dunn IF. TRAF7 is an essential regulator of blood vessel integrity during mouse embryonic and neonatal development. iScience 2023; 26:107474. [PMID: 37583551 PMCID: PMC10424150 DOI: 10.1016/j.isci.2023.107474] [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: 03/20/2023] [Revised: 05/19/2023] [Accepted: 07/21/2023] [Indexed: 08/17/2023] Open
Abstract
Targeted deletion of TRAF7 revealed that it is a crucial part of shear stress-responsive MEKK3-MEK5-ERK5 signaling pathway induced in endothelial cells by blood flow. Similar to Mekk3-, Mek5- or Erk5-deficient mice, Traf7-deficient embryos died in utero around midgestation due to impaired endothelium integrity. They displayed significantly lower expression of transcription factor Klf2, an essential regulator of vascular hemodynamic forces downstream of the MEKK3-MEK-ERK5 signaling pathway. In addition, deletion of Traf7 in endothelial cells of postnatal mice was associated with severe cerebral hemorrhage. Here, we show that besides MEKK3 and MEK5, TRAF7 associates with a planar cell polarity protein SCRIB. SCRIB binds with an N-terminal region of TRAF7, while MEKK3 associates with the C-terminal WD40 domain. Downregulation of TRAF7 as well as SCRIB inhibited fluid shear stress-induced phosphorylation of ERK5 in cultured endothelial cells. These findings suggest that TRAF7 and SCRIB may comprise an upstream part of the MEKK3-MEK5-ERK5 signaling pathway.
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Affiliation(s)
- Erdyni N. Tsitsikov
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Khanh P. Phan
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Yufeng Liu
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Alla V. Tsytsykova
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Mike Kinter
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Lauren Selland
- Histology, Immunohistochemistry, Microscopy Core-COBRE Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Lori Garman
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Courtney Griffin
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Ian F. Dunn
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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4
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Adzraku SY, Wang G, Cao C, Bao Y, Wang Y, Smith AO, Du Y, Wang H, Li Y, Xu K, Qiao J, Ju W, Zeng L. Robo4 inhibits gamma radiation-induced permeability of a murine microvascular endothelial cell by regulating the junctions. Cell Mol Biol Lett 2023; 28:2. [PMID: 36647012 PMCID: PMC9843922 DOI: 10.1186/s11658-022-00413-w] [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: 09/09/2022] [Accepted: 12/19/2022] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Hematopoietic stem cell transplantation involves irradiation preconditioning which causes bone marrow endothelial cell dysfunction. While much emphasis is on the reconstitution of hematopoietic stem cells in the bone marrow microenvironment, endothelial cell preservation is indispensable to overcome the preconditioning damages. This study aims to ascertain the role of Roundabout 4 (Robo4) in regulating irradiation-induced damage to the endothelium. METHODS Microvascular endothelial cells were treated with γ-radiation to establish an endothelial cell injury model. Robo4 expression in the endothelial cells was manipulated employing lentiviral-mediated RNAi and gene overexpression technology before irradiation treatment. The permeability of endothelial cells was measured using qPCR, immunocytochemistry, and immunoblotting to analyze the effect on the expression and distribution of junctional molecules, adherens junctions, tight junctions, and gap junctions. Using Transwell endothelial monolayer staining, FITC-Dextran permeability, and gap junction-mediated intercellular communication (GJIC) assays, we determined the changes in endothelial functions after Robo4 gene manipulation and irradiation. Moreover, we measured the proportion of CD31 expression in endothelial cells by flow cytometry. We analyzed variations between two or multiple groups using Student's t-tests and ANOVA. RESULTS Ionizing radiation upregulates Robo4 expression but disrupts endothelial junctional molecules. Robo4 deletion causes further degradation of endothelial junctions hence increasing the permeability of the endothelial cell monolayer. Robo4 knockdown in microvascular endothelial cells increases the degradation and delocalization of ZO-1, PECAM-1, occludin, and claudin-5 molecules after irradiation. Conversely, connexin 43 expression increases after silencing Robo4 in endothelial cells to induce permeability but are readily destroyed when exposed to 10 Gy of gamma radiation. Also, Robo4 knockdown enhances Y731-VE-cadherin phosphorylation leading to the depletion and destabilization of VE-cadherin at the endothelial junctions following irradiation. However, Robo4 overexpression mitigates irradiation-induced degradation of tight junctional proteins and stabilizes claudin-5 and ZO-1 distribution. Finally, the enhanced expression of Robo4 ameliorates the irradiation-induced depletion of VE-cadherin and connexin 43, improves the integrity of microvascular endothelial cell junctions, and decreases permeability. CONCLUSION This study reveals that Robo4 maintains microvascular integrity after radiation preconditioning treatment by regulating endothelial permeability and protecting endothelial functions. Our results also provided a potential mechanism to repair the bone marrow vascular niche after irradiation by modulating Robo4 expression.
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Affiliation(s)
- Seyram Yao Adzraku
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China ,Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, 221002 China
| | - Guozhang Wang
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China ,Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, 221002 China
| | - Can Cao
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China ,Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, 221002 China
| | - Yurong Bao
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Yizhou Wang
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Alhaji Osman Smith
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Yuwei Du
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Haiyang Wang
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Yue Li
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Kailin Xu
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Jianlin Qiao
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
| | - Wen Ju
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China ,Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, 221002 China
| | - Lingyu Zeng
- grid.417303.20000 0000 9927 0537Blood Diseases Institute, Xuzhou Medical University, Xuzhou, 221002 China ,Key Laboratory of Bone Marrow Stem Cell, Xuzhou, 221002 Jiangsu China ,grid.413389.40000 0004 1758 1622Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002 China
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5
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Tsitsikov EN, Hameed S, Tavakol SA, Stephens TM, Tsytsykova AV, Garman L, Bi WL, Dunn IF. Specific gene expression signatures of low grade meningiomas. Front Oncol 2023; 13:1126550. [PMID: 36937440 PMCID: PMC10016690 DOI: 10.3389/fonc.2023.1126550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 02/10/2023] [Indexed: 03/05/2023] Open
Abstract
Introduction Meningiomas are the most common primary central nervous system (CNS) tumors in adults, representing approximately one-third of all primary adult CNS tumors. Although several recent publications have proposed alternative grading systems of meningiomas that incorporate genomic and/or epigenomic data to better predict meningioma recurrence and progression-free survival, our understanding of driving forces of meningioma development is still limited. Objective To define gene expression signatures of the most common subtypes of meningiomas to better understand cellular processes and signaling pathways specific for each tumor genotype. Methods We used RNA sequencing (RNA-seq) to determine whole transcriptome profiles of twenty meningiomas with genomic alterations including NF2 inactivation, loss of chr1p, and missense mutations in TRAF7, AKT1 and KLF4. Results The analysis revealed that meningiomas with NF2 gene inactivation expressed higher levels of BCL2 and GLI1 compared with tumors harboring TRAF7 missense mutations. Moreover, NF2 meningiomas were subdivided into two distinct groups based on additional loss of chr1p. NF2 tumors with intact chr1p were characterized by the high expression of tumor suppressor PTCH2 compared to NF2 tumors with chr1p loss. Taken together with the high expression of BCL2 and GLI1, these results suggest that activation of Sonic Hedgehog pathway may contribute to NF2 meningioma development. In contrast, NF2 tumors with chr1p loss expressed high levels of transcription factor FOXD3 and its antisense RNA FOXD3-AS1. Examination of TRAF7 tumors demonstrated that TRAF7 regulates a number of biomechanically responsive genes (KRT6a, KRT16, IL1RL1, and AQP3 among others). Interestingly, AKT1 and KLF4 meningiomas expressed genes specific for PI3K/AKT signaling pathway, suggesting overlapping gene signatures between the two subtypes. In addition, KLF4 meningiomas had high expression of carcinoembryonic antigen family members CEACAM6 and CEACAM5. Conclusions Each group of meningiomas displayed a unique gene expression signature suggesting signaling pathways potentially implicated in tumorigenesis. These findings will improve our understanding of meningioma tumorigenesis and prognosis.
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Affiliation(s)
- Erdyni N. Tsitsikov
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Sanaa Hameed
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Sherwin A. Tavakol
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Tressie M. Stephens
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Alla V. Tsytsykova
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Lori Garman
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Wenya Linda Bi
- Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Ian F. Dunn
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- *Correspondence: Ian F. Dunn,
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6
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Shirakura K, Okada Y. Vascular Leakage Prevention by Roundabout 4 under Pathological Conditions. Biol Pharm Bull 2021; 44:1365-1370. [PMID: 34602544 DOI: 10.1248/bpb.b21-00413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular permeability is regulated mainly by the endothelial barrier and controls vascular homeostasis, proper vessel development, and immune cell trafficking. Several molecules are involved in regulating endothelial barrier function. Roundabout 4 (Robo4) is a single-pass transmembrane protein that is specifically expressed in vascular endothelial cells. Robo4 is an important regulator of vascular leakage and angiogenesis, especially under pathological conditions. The role of Robo4 in preventing vascular leakage has been studied in various disease models, including animal models of retinopathy, tumors, diabetes, and endotoxemia. The involvement of Robo4 in vascular endothelial growth factor and inflammation-mediated signaling pathways has been well studied, and recent evidence suggests that Robo4 modulates endothelial barrier function via distinct mechanisms. In this review, we discuss the role of Robo4 in endothelial barrier function and the underlying molecular mechanisms.
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Affiliation(s)
| | - Yoshiaki Okada
- Graduate School of Pharmaceutical Sciences, Osaka University
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7
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Aminophylline modulates the permeability of endothelial cells via the Slit2-Robo4 pathway in lipopolysaccharide-induced inflammation. Exp Ther Med 2021; 22:1042. [PMID: 34373728 PMCID: PMC8343459 DOI: 10.3892/etm.2021.10474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 06/30/2021] [Indexed: 12/13/2022] Open
Abstract
Sepsis and septic shock are the main cause of mortality in intensive care units. The prevention and treatment of sepsis remains a significant challenge worldwide. The endothelial cell barrier plays a critical role in the development of sepsis. Aminophylline, a non-selective phosphodiesterase inhibitor, has been demonstrated to reduce endothelial cell permeability. However, little is known regarding the role of aminophylline in regulating vascular permeability during sepsis, as well as the potential underlying mechanisms. In the present study, the Slit2/Robo4 signaling pathway, the downstream protein, vascular endothelial (VE)-cadherin and endothelial cell permeability were investigated in a lipopolysaccharide (LPS)-induced inflammation model. It was indicated that, in human umbilical vein endothelial cells (HUVECs), LPS downregulated Slit2, Robo4 and VE-cadherin protein expression levels and, as expected, increased endothelial cell permeability in vitro during inflammation. After administration of aminophylline, the protein expression levels of Slit2, Robo4 and VE-cadherin were upregulated and endothelial cell permeability was significantly improved. These results suggested that the permeability of endothelial cells could be mediated by VE-cadherin via the Slit2/Robo4 signaling pathway. Aminophylline reduced endothelial permeability in a LPS-induced inflammation model. Therefore, aminophylline may represent a promising candidate for modulating vascular permeability induced by inflammation or sepsis.
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8
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Shi X, Dong N, Qiu Q, Li S, Zhang J. Salidroside Prevents Hypoxia-Induced Human Retinal Microvascular Endothelial Cell Damage Via miR-138/ROBO4 Axis. Invest Ophthalmol Vis Sci 2021; 62:25. [PMID: 34269814 PMCID: PMC8297420 DOI: 10.1167/iovs.62.9.25] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Purpose Retinopathies are associated with the injury of retinal microvascular endothelial cells. Salidroside (SAL) is a medicinal supplement that has antioxidative and cytoprotective properties. We hypothesized that SAL might have a protective function in retinopathies. This research aims to explore the function and mechanism of SAL in hypoxia-induced retinal microvascular endothelial cell injury. Methods Human retinal microvascular endothelial cells (HRMECs) injury was induced by culturing under hypoxic condition. The function of SAL on HRMECs injury was investigated using cell counting kit-8, 5-ethynyl-2′-deoxyuridine (EdU) staining, flow cytometry, Western blotting, and enzyme linked immunosorbent assay. MicroRNA (miR)-138, roundabout 4 (ROBO4), and proteins in the phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathways were examined using quantitative reverse transcription polymerase chain reaction or Western blotting. The target correlation was determined by dual-luciferase reporter analysis and RNA immunoprecipitation. Results Hypoxia resulted in proliferation inhibition, cycle arrest, apoptosis, inflammatory reaction, and oxidative stress in HRMECs. SAL attenuated hypoxia-induced HRMECs injury via increasing cell proliferation, and mitigating cycle arrest, apoptosis, inflammatory reaction, and oxidative stress. MiR-138 expression was enhanced by hypoxia, and decreased via SAL stimulation. MiR-138 upregulation reversed the influence of SAL on hypoxia-induced HRMECs injury. ROBO4 was targeted via miR-138. ROBO4 overexpression weakened the role of miR-138 in HRMECs injury. The PI3K/AKT/mTOR pathway was inactivated under hypoxic condition, and SAL increased the activation of PI3K/AKT/mTOR pathways by decreasing miR-138. Conclusions SAL protected against hypoxia-induced HRMECs injury through regulating miR-138/ROBO4 axis, indicating the protective potential of SAL in retinopathies.
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Affiliation(s)
- Xiaoling Shi
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, Fujian, China.,Affiliated Xiamen Eye Center, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Nuo Dong
- Affiliated Xiamen Eye Center, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Qi Qiu
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Shanhua Li
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Jiaxing Zhang
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, Fujian, China
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9
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Kashio T, Shirakura K, Kinoshita M, Morita M, Ishiba R, Muraoka K, Kanbara T, Tanaka M, Funatsu R, Hino N, Koyama S, Suzuki R, Yoshioka Y, Aoshi T, Doi T, Okada Y. HDAC inhibitor, MS-275, increases vascular permeability by suppressing Robo4 expression in endothelial cells. Tissue Barriers 2021; 9:1911195. [PMID: 33955828 DOI: 10.1080/21688370.2021.1911195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Roundabout guidance receptor 4 (Robo4) is an endothelial-specific membrane protein that suppresses pathological angiogenesis and vascular hyperpermeability by stabilizing endothelial cells. Robo4 suppresses severe systemic inflammation induced by pathogens and endotoxins and inhibits tumor growth and metastasis, therefore serving as a potential therapeutic target. Although the regulation of Robo4 expression through transcription factors and epigenetic mechanisms has been studied, the role of histone deacetylases (HDACs) has not been explored. In the present study, we investigated the involvement of HDACs in the regulation of Robo4 expression. An HDAC inhibitor, MS-275, which inhibits HDAC1, HDAC2, and HDAC3, was found to suppress Robo4 expression in endothelial cells. Small interfering RNA (siRNA)-mediated knockdown of HDAC3, but not of HDAC1 and 2, also decreased its expression level. MS-275 downregulated the expression of the transcription factor complex GABP, in addition to suppressing Robo4 promoter activity. GABP expression was also downregulated by the siRNA against HDAC3. MS-275 decreased the transendothelial electrical resistance of a monolayer of mouse endothelial cells and increased the rate of leakage of Evans blue dye in the mouse lungs. In addition, MS-275 accelerated cell migration through the endothelial cell monolayer and augmented cell extravasation in the mouse lungs. Taken together, we demonstrated that MS-275 suppresses Robo4 expression by inhibiting HDAC3 in endothelial cells and enhances endothelial and vascular permeability. Thus, we demonstrated a novel mechanism regulating Robo4 expression and vascular permeability, which is anticipated to contribute to future therapies for infectious and inflammatory diseases.
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Affiliation(s)
- Taito Kashio
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Keisuke Shirakura
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Mayumi Kinoshita
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Maaya Morita
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Ryosuke Ishiba
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Kosuke Muraoka
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Tomoaki Kanbara
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Masato Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Risa Funatsu
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Nobumasa Hino
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Shohei Koyama
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ryo Suzuki
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan.,Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
| | - Yasuo Yoshioka
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan.,Vaccine Creation Group, BIKEN Innovative Vaccine Research Alliance Laboratories, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.,BIKEN Center for Innovative Vaccine Research and Development, the Research Foundation for Microbial Diseases of Osaka University, Osaka, Japan
| | - Taiki Aoshi
- Department of Cellular Immunology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Takefumi Doi
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Yoshiaki Okada
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
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Zhou W, Lin D, Zhong Z, Ye Q. Roles of TRAFs in Ischemia-Reperfusion Injury. Front Cell Dev Biol 2020; 8:586487. [PMID: 33224951 PMCID: PMC7674171 DOI: 10.3389/fcell.2020.586487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/05/2020] [Indexed: 12/13/2022] Open
Abstract
Tumor necrosis factor receptor-associated factor (TRAF) proteins are a family of signaling molecules that function downstream of multiple receptor signaling pathways, and they play a pivotal role in the regulation of intracellular biological progresses. These TRAF-dependent signaling pathways and physiological functions have been involved in the occurrence and progression of ischemia-reperfusion injury (IRI), which is a common pathophysiological process that occurs in a wide variety of clinical events, including ischemic shock, organ transplantation, and thrombolytic therapy, resulting in a poor prognosis and high mortality. IRI occurs in multiple organs, including liver, kidney, heart, lung, brain, intestine, and retina. In recent years, mounting compelling evidence has confirmed that the genetic alterations of TRAFs can cause subversive phenotype changes during IRI of those organs. In this review, based on current knowledge, we summarized and analyzed the regulatory effect of TRAFs on the IRI of various organs, providing clear direction and a firm theoretical basis for the development of treatment strategies to manipulate TRAF proteins or TRAF-dependent signaling pathways in IRI-related diseases.
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Affiliation(s)
- Wei Zhou
- Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Engineering Research Center of Natural Polymer-based Medical Materials in Hubei Province, Wuhan, China
| | - Danni Lin
- Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Engineering Research Center of Natural Polymer-based Medical Materials in Hubei Province, Wuhan, China.,The First Affiliated Hospital, Zhejiang University School of Medicine, Department of Hepatobiliary and Pancreatic Surgery, Zhejiang Provincial Key Laboratory of Pancreatic Disease, Innovation Center for the Study of Pancreatic Diseases, Hangzhou, China
| | - Zibiao Zhong
- Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Engineering Research Center of Natural Polymer-based Medical Materials in Hubei Province, Wuhan, China
| | - Qifa Ye
- Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Engineering Research Center of Natural Polymer-based Medical Materials in Hubei Province, Wuhan, China.,The Third Xiangya Hospital of Central South University, Research Center of National Health Ministry on Transplantation Medicine Engineering and Technology, Changsha, China
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Izawa K, Shirakura K, Kakiuchi K, Funahashi N, Maekawa N, Hino N, Tanaka T, Doi T, Okada Y. PRC2 Components Maintain DNA Hypermethylation of the Upstream Promoter and Regulate Robo4 Expression in Endothelial Cells. Biol Pharm Bull 2020; 43:742-746. [DOI: 10.1248/bpb.b19-01014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kohei Izawa
- Graduate School of Pharmaceutical Sciences, Osaka University
| | | | - Koji Kakiuchi
- Graduate School of Pharmaceutical Sciences, Osaka University
| | | | - Naoki Maekawa
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Nobumasa Hino
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Toru Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Takefumi Doi
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Yoshiaki Okada
- Graduate School of Pharmaceutical Sciences, Osaka University
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Janßen HC, Angrisani N, Kalies S, Hansmann F, Kietzmann M, Warwas DP, Behrens P, Reifenrath J. Biodistribution, biocompatibility and targeted accumulation of magnetic nanoporous silica nanoparticles as drug carrier in orthopedics. J Nanobiotechnology 2020; 18:14. [PMID: 31941495 PMCID: PMC6964035 DOI: 10.1186/s12951-020-0578-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 01/08/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND In orthopedics, the treatment of implant-associated infections represents a high challenge. Especially, potent antibacterial effects at implant surfaces can only be achieved by the use of high doses of antibiotics, and still often fail. Drug-loaded magnetic nanoparticles are very promising for local selective therapy, enabling lower systemic antibiotic doses and reducing adverse side effects. The idea of the following study was the local accumulation of such nanoparticles by an externally applied magnetic field combined with a magnetizable implant. The examination of the biodistribution of the nanoparticles, their effective accumulation at the implant and possible adverse side effects were the focus. In a BALB/c mouse model (n = 50) ferritic steel 1.4521 and Ti90Al6V4 (control) implants were inserted subcutaneously at the hindlimbs. Afterwards, magnetic nanoporous silica nanoparticles (MNPSNPs), modified with rhodamine B isothiocyanate and polyethylene glycol-silane (PEG), were administered intravenously. Directly/1/7/21/42 day(s) after subsequent application of a magnetic field gradient produced by an electromagnet, the nanoparticle biodistribution was evaluated by smear samples, histology and multiphoton microscopy of organs. Additionally, a pathohistological examination was performed. Accumulation on and around implants was evaluated by droplet samples and histology. RESULTS Clinical and histological examinations showed no MNPSNP-associated changes in mice at all investigated time points. Although PEGylated, MNPSNPs were mainly trapped in lung, liver, and spleen. Over time, they showed two distributional patterns: early significant drops in blood, lung, and kidney and slow decreases in liver and spleen. The accumulation of MNPSNPs on the magnetizable implant and in its area was very low with no significant differences towards the control. CONCLUSION Despite massive nanoparticle capture by the mononuclear phagocyte system, no significant pathomorphological alterations were found in affected organs. This shows good biocompatibility of MNPSNPs after intravenous administration. The organ uptake led to insufficient availability of MNPSNPs in the implant region. For that reason, among others, the nanoparticles did not achieve targeted accumulation in the desired way, manifesting future research need. However, with different conditions and dimensions in humans and further modifications of the nanoparticles, this principle should enable reaching magnetizable implant surfaces at any time in any body region for a therapeutic reason.
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Affiliation(s)
- Hilke Catherina Janßen
- Clinic for Orthopedic Surgery, NIFE-Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover Medical School, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Nina Angrisani
- Clinic for Orthopedic Surgery, NIFE-Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover Medical School, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Stefan Kalies
- Institute of Quantum Optics, NIFE-Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Leibniz University Hannover, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Florian Hansmann
- Department of Pathology, University of Veterinary Medicine Hanover Foundation, Buenteweg 17, 30559, Hannover, Germany
| | - Manfred Kietzmann
- Institute of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hanover Foundation, Buenteweg 17, 30559, Hannover, Germany
| | - Dawid Peter Warwas
- Institute for Inorganic Chemistry, Leibniz University Hannover, Callinstraße 9, 30167, Hannover, Germany
| | - Peter Behrens
- Institute for Inorganic Chemistry, Leibniz University Hannover, Callinstraße 9, 30167, Hannover, Germany
| | - Janin Reifenrath
- Clinic for Orthopedic Surgery, NIFE-Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover Medical School, Stadtfelddamm 34, 30625, Hannover, Germany.
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13
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Regulatory mechanisms of Robo4 and their effects on angiogenesis. Biosci Rep 2019; 39:BSR20190513. [PMID: 31160487 PMCID: PMC6620384 DOI: 10.1042/bsr20190513] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 12/13/2022] Open
Abstract
Roundabout4 (Robo4) is a transmembrane receptor that belongs to the Roundabout (Robo) family of axon guidance molecules. Robo4 is an endothelial-specific receptor that participates in endothelial cell migration, proliferation, and angiogenesis and the maintenance of vasculature homeostasis. The purpose of this review is to summarize and analyze three main mechanisms related to the expression and function of Robo4 during developmental and pathological angiogenesis. In this review, static shear stress and the binding of transcription factors such as E26 transformation-specific variant 2 (ETV2) and Slit3 induce Robo4 expression and activate Robo4 during tissue and organ development. Robo4 interacts with Slit2 or UNC5B to maintain vascular integrity, while a disturbed flow and the expression of transcription factors in inflammatory or neoplastic environments alter Robo4 expression levels, although these changes have uncertain functions. Based on the mechanisms described above, we discuss the aberrant expression of Robo4 in angiogenesis-related diseases and propose antiangiogenic therapies targeting the Robo4 signaling pathway for the treatment of ocular neovascularization lesions and tumors. Finally, although many problems related to Robo4 signaling pathways remain to be resolved, Robo4 is a promising and potentially valuable therapeutic target for treating pathological angiogenesis and developmental defects in angiogenesis.
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