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Ugodnikov A, Chebotarev O, Persson H, Simmons CA. Sensitivity and Validation of Porous Membrane Electrical Cell Substrate Impedance Spectroscopy (PM-ECIS) for Measuring Endothelial Barrier Properties. ACS Biomater Sci Eng 2024. [PMID: 38943620 DOI: 10.1021/acsbiomaterials.3c01898] [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: 07/01/2024]
Abstract
Measurement of endothelial and epithelial barrier integrity is important for a variety of in vitro models, including Transwell assays, cocultures, and organ-on-chip platforms. Barrier resistance is typically measured by trans-endothelial electrical resistance (TEER), but TEER is invasive and cannot accurately measure isolated monolayer resistance in coculture or most organ-on-chip devices. These limitations are addressed by porous membrane electrical cell-substrate impedance sensing (PM-ECIS), which measures barrier integrity in cell monolayers grown directly on permeable membranes patterned with electrodes. Here, we advanced the design and utility of PM-ECIS by investigating its sensitivity to working electrode size and correlation with TEER. Gold electrodes were fabricated on porous membrane inserts using hot embossing and UV lithography, with working electrode diameters of 250, 500, and 750 μm within the same insert. Sensitivity to resistance changes (4 kHz) during endothelial barrier formation was inversely proportional to electrode size, with the smallest being the most sensitive (p < 0.001). Similarly, smaller electrodes were most sensitive to changes in impedance (40 kHz) corresponding to cell spreading and proliferation (p < 0.001). Barrier disruption with both EGTA and thrombin was detectable by all electrode sizes. Resistances measured by PM-ECIS vs TEER for sodium chloride solutions were positively and significantly correlated for all electrode sizes (r > 0.9; p < 0.0001), but only with 750 μm electrodes for endothelial monolayers (r = 0.71; p = 0.058). These data inform the design and selection of PM-ECIS electrodes for specific applications and support PM-ECIS as a promising alternative to conventional TEER for direct, noninvasive, real-time assessment of cells cultured on porous membranes in conventional and organ-on-chip barrier models.
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Affiliation(s)
- Alisa Ugodnikov
- Translational Biology & Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto , ON M5S 3G9, Canada
| | - Oleg Chebotarev
- Translational Biology & Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
| | - Henrik Persson
- Translational Biology & Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
| | - Craig A Simmons
- Translational Biology & Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto , ON M5S 3G9, Canada
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
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2
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Li D, Jiu J, Liu H, Yan X, Li X, Yan L, Zhang J, Fan Z, Li S, Du G, Li JJ, Du Y, Liu W, Wang B. Tissue-engineered mesenchymal stem cell constructs alleviate tendinopathy by suppressing vascularization. Bioact Mater 2024; 36:474-489. [PMID: 39055350 PMCID: PMC11269794 DOI: 10.1016/j.bioactmat.2024.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/19/2024] [Accepted: 06/19/2024] [Indexed: 07/27/2024] Open
Abstract
Tendinopathy leads to low-grade tissue inflammation and chronic damage, which progresses due to pathological imbalance in angiogenesis. Reducing early pathological vascularization may be a new approach in helping to regenerate tendon tissue. Conventional stem cell therapy and tissue engineering scaffolds have not been highly effective at treating tendinopathy. In this study, tissue engineered stem cells (TSCs) generated using human umbilical cord mesenchymal stem cells (hUC-MSCs) were combined with microcarrier scaffolds to limit excessive vascularization in tendinopathy. By preventing VEGF receptor activation through their paracrine function, TSCs reduced in vitro angiogenesis and the proliferation of vascular endothelial cells. TSCs also decreased the inflammatory expression of tenocytes while promoting their anabolic and tenogenic characteristics. Furthermore, local injection of TSCs into rats with collagenase-induced tendinopathy substantially reduced early inflammation and vascularization. Mechanistically, transcriptome sequencing revealed that TSCs could reduce the progression of pathological angiogenesis in tendon tissue, attributed to Rap1-mediated vascular inhibition. TSCs may serve as a novel and practical approach for suppressing tendon vascularization, and provide a promising therapeutic agent for early-stage clinical tendinopathy.
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Affiliation(s)
- Dijun Li
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
- Department of Orthopedics, Affiliated Renhe Hospital of China Three Gorges University, Yichang, China
| | - Jingwei Jiu
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Haifeng Liu
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Xiaojun Yan
- Department of Biomedical Engineering, School of Medicine, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, 100084, China
- Beijing CytoNiche Biotechnology Co. Ltd, Beijing, 10081, China
| | - Xiaoke Li
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Lei Yan
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Jing Zhang
- Department of Emergency Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550001, China
| | - Zijuan Fan
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, 030001, China
| | - Songyan Li
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Guangyuan Du
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Jiao Jiao Li
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Yanan Du
- Department of Biomedical Engineering, School of Medicine, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Wei Liu
- Department of Biomedical Engineering, School of Medicine, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, 100084, China
- Beijing CytoNiche Biotechnology Co. Ltd, Beijing, 10081, China
| | - Bin Wang
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
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3
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Agarwal H, Tinsley B, Sarecha AK, Ozcan L. Rap1 in the Context of PCSK9, Atherosclerosis, and Diabetes. Curr Atheroscler Rep 2023; 25:931-937. [PMID: 37979063 DOI: 10.1007/s11883-023-01162-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2023] [Indexed: 11/19/2023]
Abstract
PURPOSE OF REVIEW The focus of this article is to highlight the importance of the small GTPase, Ras-associated protein 1 (Rap1), in proprotein convertase subtilisin/kexin type 9 (PCSK9) regulation and atherosclerosis and type 2 diabetes etiology and discuss the potential therapeutic implications of targeting Rap1 in these disease areas. REVIEW FINDINGS Cardiometabolic disease characterized by obesity, glucose intolerance, dyslipidemia, and atherosclerotic cardiovascular disease remain an important cause of mortality. Evidence using mouse models of obesity and insulin resistance indicates that Rap1 deficiency increases proatherogenic PCSK9 and low-density lipoprotein cholesterol levels and predisposes these mice to develop obesity- and statin-induced hyperglycemia, which highlights Rap1's role in cardiometabolic dysfunction. Rap1 may also contribute to cardiovascular disease through its effects on vascular wall cells involved in the atherosclerosis progression. Rap1 activation, specifically in the liver, could be beneficial in the prevention of cardiometabolic perturbations, including type 2 diabetes, hypercholesterolemia, and atherosclerosis.
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Affiliation(s)
- Heena Agarwal
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Brea Tinsley
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Amesh K Sarecha
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Lale Ozcan
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, 10032, USA.
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Sharma GP, Kosuru R, Lakshmikanthan S, Zheng S, Chen Y, Burns R, Xin G, Cui W, Chrzanowska M. Endothelial Rap1B mediates T-cell exclusion to promote tumor growth: a novel mechanism underlying vascular immunosuppression. Angiogenesis 2023; 26:265-278. [PMID: 36403190 DOI: 10.1007/s10456-022-09862-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/05/2022] [Indexed: 11/21/2022]
Abstract
Overcoming vascular immunosuppression: lack of endothelial cell (EC) responsiveness to inflammatory stimuli in the proangiogenic environment of tumors, is essential for successful cancer immunotherapy. The mechanisms through which Vascular Endothelial Growth Factor A(VEGF-A) modulates tumor EC response to exclude T-cells are not well understood. Here, we demonstrate that EC-specific deletion of small GTPase Rap1B, previously implicated in normal angiogenesis, restricts tumor growth in endothelial-specific Rap1B-knockout (Rap1BiΔEC) mice. EC-specific Rap1B deletion inhibits angiogenesis, but also leads to an altered tumor microenvironment with increased recruitment of leukocytes and increased activity of tumor CD8+ T-cells. Depletion of CD8+ T-cells restored tumor growth in Rap1BiΔEC mice. Mechanistically, global transcriptome and functional analyses indicated upregulation of signaling by a tumor cytokine, TNF-α, and increased NF-κB transcription in Rap1B-deficient ECs. Rap1B-deficiency led to elevated proinflammatory chemokine and Cell Adhesion Molecules (CAMs) expression in TNF-α stimulated ECs. Importantly, CAM expression was elevated in tumor ECs from Rap1BiΔEC mice. Significantly, Rap1B deletion prevented VEGF-A-induced immunosuppressive downregulation of CAM expression, demonstrating that Rap1B is essential for VEGF-A-suppressive signaling. Thus, our studies identify a novel endothelial-endogenous mechanism underlying VEGF-A-dependent desensitization of EC to proinflammatory stimuli. Significantly, they identify EC Rap1B as a potential novel vascular target in cancer immunotherapy.
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Affiliation(s)
| | - Ramoji Kosuru
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
| | | | - Shikan Zheng
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
| | - Yao Chen
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Robert Burns
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
| | - Gang Xin
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
| | - Weiguo Cui
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Magdalena Chrzanowska
- Versiti Blood Research Institute, Milwaukee, WI, 53201-2178, USA.
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, USA.
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5
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Study on Mechanism of Invigorating Qi and Promoting Blood Circulation in Treatment of Angiogenesis after Myocardial Infarction Using Network Pharmacology. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:5093486. [PMID: 35656461 PMCID: PMC9152384 DOI: 10.1155/2022/5093486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 04/29/2022] [Indexed: 12/05/2022]
Abstract
Objective This article aims to explore the impact and mechanism of invigorating qi and promoting blood circulation (IQPBC) on angiogenesis after myocardial infarction (AMI) by using network pharmacology approach. Methods First, IQPBC was searched on the traditional Chinese medicine systems pharmacology database and analysis platform (TCMSP), and the main active ingredients and targets of IQPBC were screened and obtained. Second, by virtue of GeneCards and Online Mendelian Inheritance in Man (OMIM) databases, the targets related to AMI are screened and then obtained. Then, the intersection targets between IQPBC and AMI can be obtained by using online tool Venny 2.1.0. Third, based on the STRING database, the interaction of target proteins is established and some key targets can be analyzed and obtained. Finally, the IQPBC-AMI interaction network is constructed by using Cytoscape, and Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses are executed by DAVID and OmicShare databases. Results 143 intersection targets between IQPBC and AMI are obtained. Besides, key active ingredients, namely, quercetin, tanshinone, kaempferol, and luteolin, are shown. Furthermore, AKT1, VEGFA, STAT3, HIF-1α, and other 10 key targets are obtained. A total of 752 enrichment results are acquired by using GO analysis. KEGG pathway enrichment analysis shows 241 signaling pathways, focusing on cancer, fluid shear stress and atherosclerosis, and TNF and PI3K/AKT signaling pathways. Conclusion This article studies the potential targets and signaling pathways of IQPBC drugs acting on AMI via the network pharmacology approach, which better illustrates the effect and mechanism, and provides some good ideas for the following mechanism research studies.
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6
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Yamamoto K, Takagi Y, Ando K, Fukuhara S. Rap1 Small GTPase Regulates Vascular Endothelial-Cadherin-Mediated Endothelial Cell-Cell Junctions and Vascular Permeability. Biol Pharm Bull 2021; 44:1371-1379. [PMID: 34602545 DOI: 10.1248/bpb.b21-00504] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The vascular permeability of the endothelium is finely controlled by vascular endothelial (VE)-cadherin-mediated endothelial cell-cell junctions. In the majority of normal adult tissues, endothelial cells in blood vessels maintain vascular permeability at a relatively low level, while in response to inflammation, they limit vascular barrier function to induce plasma leakage and extravasation of immune cells as a defense mechanism. Thus, the dynamic but also simultaneously tight regulation of vascular permeability by endothelial cells is responsible for maintaining homeostasis and, as such, impairments of its underlying mechanisms result in hyperpermeability, leading to the development and progression of various diseases including coronavirus disease 2019 (COVID-19), a newly emerging infectious disease. Recently, increasing numbers of studies have been unveiling the important role of Rap1, a small guanosine 5'-triphosphatase (GTPase) belonging to the Ras superfamily, in the regulation of vascular permeability. Rap1 enhances VE-cadherin-mediated endothelial cell-cell junctions to potentiate vascular barrier functions via dynamic reorganization of the actin cytoskeleton. Importantly, Rap1 signaling activation reportedly improves vascular barrier function in animal models of various diseases associated with vascular hyperpermeability, suggesting that Rap1 might be an ideal target for drugs intended to prevent vascular barrier dysfunction. Here, we describe recent progress in understanding the mechanisms by which Rap1 potentiates VE-cadherin-mediated endothelial cell-cell adhesions and vascular barrier function. We also discuss how alterations in Rap1 signaling are related to vascular barrier dysfunction in diseases such as acute pulmonary injury and malignancies. In addition, we examine the possibility of Rap1 signaling as a target of drugs for treating diseases associated with vascular hyperpermeability.
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Affiliation(s)
- Kiyotake Yamamoto
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School
| | - Yuki Takagi
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School
| | - Koji Ando
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School
| | - Shigetomo Fukuhara
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School
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7
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Ruggiero D, Nutile T, Nappo S, Tirozzi A, Bellenguez C, Leutenegger AL, Ciullo M. Genetics of PlGF plasma levels highlights a role of its receptors and supports the link between angiogenesis and immunity. Sci Rep 2021; 11:16821. [PMID: 34413389 PMCID: PMC8376970 DOI: 10.1038/s41598-021-96256-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 07/28/2021] [Indexed: 11/29/2022] Open
Abstract
Placental growth factor (PlGF) is a member of the vascular endothelial growth factor family and is involved in bone marrow-derived cell activation, endothelial stimulation and pathological angiogenesis. High levels of PlGF have been observed in several pathological conditions especially in cancer, cardiovascular, autoimmune and inflammatory diseases. Little is known about the genetics of circulating PlGF levels. Indeed, although the heritability of circulating PlGF levels is around 40%, no studies have assessed the relation between PlGF plasma levels and genetic variants at a genome-wide level. In the current study, PlGF plasma levels were measured in a population-based sample of 2085 adult individuals from three isolated populations of South Italy. A GWAS was performed in a discovery cohort (N = 1600), followed by a de novo replication (N = 468) from the same populations. The meta-analysis of the discovery and replication samples revealed one signal significantly associated with PlGF circulating levels. This signal was mapped to the PlGF co-receptor coding gene NRP1, indicating its important role in modulating the PlGF plasma levels. Two additional signals, at the PlGF receptor coding gene FLT1 and RAPGEF5 gene, were identified at a suggestive level. Pathway and TWAS analyses highlighted genes known to be involved in angiogenesis and immune response, supporting the link between these processes and PlGF regulation. Overall, these data improve our understanding of the genetic variation underlying circulating PlGF levels. This in turn could lead to new preventive and therapeutic strategies for a wide variety of PlGF-related pathologies.
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Affiliation(s)
- Daniela Ruggiero
- Institute of Genetics and Biophysics "A. Buzzati-Traverso", National Research Council of Italy (CNR), Via Pietro Castellino, 111, 80131, Naples, Italy.
- IRCCS Neuromed, Pozzilli, Isernia, Italy.
| | - Teresa Nutile
- Institute of Genetics and Biophysics "A. Buzzati-Traverso", National Research Council of Italy (CNR), Via Pietro Castellino, 111, 80131, Naples, Italy
| | | | | | - Celine Bellenguez
- CHU Lille, U1167 - Labex DISTALZ - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Inserm, Institut Pasteur de Lille, Univ. Lille, 59000, Lille, France
| | - Anne-Louise Leutenegger
- UMR 946, Genetic Variation and Human Diseases, Inserm, 75010, Paris, France
- UMR946, Université Paris-Diderot, Sorbonne Paris Cité, 75010, Paris, France
| | - Marina Ciullo
- Institute of Genetics and Biophysics "A. Buzzati-Traverso", National Research Council of Italy (CNR), Via Pietro Castellino, 111, 80131, Naples, Italy.
- IRCCS Neuromed, Pozzilli, Isernia, Italy.
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8
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Dai Y, Liu J, Zhang X, Min X, Wu J, Du S, Li T, Liu L, Ding Z. HSPA12A improves endothelial integrity to attenuate lung injury during endotoxemia through activating ERKs and Akt-dependent signaling. Int Immunopharmacol 2021; 99:107987. [PMID: 34343936 DOI: 10.1016/j.intimp.2021.107987] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/27/2021] [Accepted: 07/12/2021] [Indexed: 10/20/2022]
Abstract
Acute lung injury (ALI) is a critical manifestation of sepsis/septic shock. Disruption of endothelial barrier function is critical for ALI pathogenesis; however, the regulation of endothelial barrier integrity remains largely unclear. Heat shock protein A12A (HSPA12A) is an atypical member of HSP70 family. We have recently demonstrated that hepatocyte HSPA12A attenuated the bacteria endotoxin (lipopolysaccharide, LPS)-induced liver injury. However, the role of HSPA12A in endothelial barrier function and ALI is unknown. Here in this study, HSPA12A showed upregulation in lungs of mice during bacteria endotoxin (lipopolysaccharide, LPS)-induced lung injury in vivo and in primary human umbilical vein endothelial cells (HUVECs) during LPS-induced barrier disruption in vitro. Knockout of HSPA12A in mice exacerbated LPS-induced ALI. Intriguingly, overexpression of HSPA12A in HUVECs attenuated the LPS-induced endothelial hyperpermeability. In line with this, HSPA12A overexpression increased VE-cadherin and decreased VEGF expression following LPS treatment in HUVECs. Also, knockout of HSPA12A enhanced the LPS-evoked pulmonary endothelial cell apoptosis in mice whereas overexpression of HSPA12A inhibited the LPS-induced death of HUVECs. The levels of ERKs and Akt phosphorylation in HUVECs were promoted by HSPA12A overexpression when cells exposed to LPS. Importantly, inhibition of either ERKs or Akt diminished the HSPA12A-induced protection from LPS-induced endothelial hyperpermeability and death. Taken together, these findings indicated that HSPA12A is a novel regulator of endothelial barrier function through both ERKs and Akt-mediated signaling. HSPA12A might represent a viable strategy for the pulmonary protection against endotoxemia challenge.
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Affiliation(s)
- Yuan Dai
- Department of Anesthesiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Jiali Liu
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiaojin Zhang
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xinxu Min
- Department of Anesthesiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Jun Wu
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Shuya Du
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Tingting Li
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Li Liu
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Zhengnian Ding
- Department of Anesthesiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
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9
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Ramshekar A, Wang H, Kunz E, Pappas C, Hageman GS, Chaqour B, Sacks DB, Hartnett ME. Active Rap1-mediated inhibition of choroidal neovascularization requires interactions with IQGAP1 in choroidal endothelial cells. FASEB J 2021; 35:e21642. [PMID: 34166557 PMCID: PMC8238370 DOI: 10.1096/fj.202100112r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 04/08/2021] [Accepted: 04/19/2021] [Indexed: 01/13/2023]
Abstract
Neovascular age-related macular degeneration (nAMD) is a leading cause of blindness. The pathophysiology involves activation of choroidal endothelial cells (CECs) to transmigrate the retinal pigment epithelial (RPE) monolayer and form choroidal neovascularization (CNV) in the neural retina. The multidomain GTPase binding protein, IQGAP1, binds active Rac1 and sustains activation of CECs, thereby enabling migration associated with vision-threatening CNV. IQGAP1 also binds the GTPase, Rap1, which when activated reduces Rac1 activation in CECs and CNV. In this study, we tested the hypothesis that active Rap1 binding to IQGAP1 is necessary and sufficient to reduce Rac1 activation in CECs, and CNV. We found that pharmacologic activation of Rap1 or adenoviral transduction of constitutively active Rap1a reduced VEGF-mediated Rac1 activation, migration, and tube formation in CECs. Following pharmacologic activation of Rap1, VEGF-mediated Rac1 activation was reduced in CECs transfected with an IQGAP1 construct that increased active Rap1-IQGAP1 binding but not in CECs transfected with an IQGAP1 construct lacking the Rap1 binding domain. Specific knockout of IQGAP1 in endothelial cells reduced laser-induced CNV and Rac1 activation in CNV lesions, but pharmacologic activation of Rap1 did not further reduce CNV compared to littermate controls. Taken together, our findings provide evidence that active Rap1 binding to the IQ domain of IQGAP1 is sufficient to interfere with active Rac1-mediated CEC activation and CNV formation.
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Affiliation(s)
- Aniket Ramshekar
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA
| | - Haibo Wang
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA
| | - Eric Kunz
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA
| | - Christian Pappas
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA,Steele Center for Translational Medicine, John A. Moran Eye
Center, University of Utah, Salt Lake City, UT, USA
| | - Gregory S. Hageman
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA,Steele Center for Translational Medicine, John A. Moran Eye
Center, University of Utah, Salt Lake City, UT, USA
| | - Brahim Chaqour
- Department of Ophthalmology, Downstate Medical Center,
Brooklyn, NY, USA
| | - David B. Sacks
- Department of Laboratory Medicine, National Institutes of
Health, Bethesda, MD, USA
| | - M. Elizabeth Hartnett
- The John A Moran Eye Center, University of Utah, Salt Lake
City, UT, USA,Correspondence to: M. Elizabeth Hartnett,
MD, Address: 65 Mario Capecchi Drive, Salt Lake City, UT 84132. Tel:
801-213-4110; Fax: 801-581-3357,
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10
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Kosuru R, Singh B, Lakshmikanthan S, Nishijima Y, Vasquez-Vivar J, Zhang DX, Chrzanowska M. Distinct Signaling Functions of Rap1 Isoforms in NO Release From Endothelium. Front Cell Dev Biol 2021; 9:687598. [PMID: 34222255 PMCID: PMC8247587 DOI: 10.3389/fcell.2021.687598] [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: 03/29/2021] [Accepted: 05/21/2021] [Indexed: 11/25/2022] Open
Abstract
Small GTPase Rap1 plays a prominent role in endothelial cell (EC) homeostasis by promoting NO release. Endothelial deletion of the two highly homologous Rap1 isoforms, Rap1A and Rap1B, leads to endothelial dysfunction ex vivo and hypertension in vivo. Mechanistically, we showed that Rap1B promotes NO release in response to shear flow by promoting mechanosensing complex formation involving VEGFR2 and Akt activation. However, the specific contribution of the Rap1A isoform to NO release and the underlying molecular mechanisms through which the two Rap1 isoforms control endothelial function are unknown. Here, we demonstrate that endothelial dysfunction resulting from knockout of both Rap1A and Rap1B isoforms is ameliorated by exogenous L-Arg administration to rescue NO-dependent vasorelaxation and blood pressure. We confirmed that Rap1B is rapidly activated in response to agonists that trigger eNOS activation, and its deletion in ECs attenuates eNOS activation, as detected by decreased Ser1177 phosphorylation. Somewhat surprising was the finding that EC deletion of Rap1A does not lead to impaired agonist-induced vasorelaxation ex vivo. Mechanistically, the deletion of Rap1A led to elevated eNOS phosphorylation both at the inhibitory, T495, and the activating Ser1177 residues. These findings indicate that the two Rap1 isoforms act via distinct signaling pathways: while Rap1B directly positively regulates eNOS activation, Rap1A prevents negative regulation of eNOS. Notably, the combined deficiency of Rap1A and Rap1B has a severe effect on eNOS activity and NO release with an in vivo impact on endothelial function and vascular homeostasis.
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Affiliation(s)
- Ramoji Kosuru
- Blood Research Institute, Versiti, Milwaukee, WI, United States
| | - Bandana Singh
- Blood Research Institute, Versiti, Milwaukee, WI, United States
| | | | - Yoshinori Nishijima
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jeannette Vasquez-Vivar
- Department of Biophysics and Redox Biology Program, Medical College of Wisconsin, Milwaukee, WI, United States
| | - David X Zhang
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Magdalena Chrzanowska
- Blood Research Institute, Versiti, Milwaukee, WI, United States.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States.,Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, United States
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A Bioinformatics Investigation into the Pharmacological Mechanisms of Sodium-Glucose Co-transporter 2 Inhibitors in Diabetes Mellitus and Heart Failure Based on Network Pharmacology. Cardiovasc Drugs Ther 2021; 36:713-726. [PMID: 34028657 PMCID: PMC9270285 DOI: 10.1007/s10557-021-07186-y] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/05/2021] [Indexed: 12/17/2022]
Abstract
PURPOSE Diabetes mellitus (DM) is a major risk factor for the development of heart failure (HF). Sodium-glucose co-transporter 2 (SGLT2) inhibitors have demonstrated consistent benefits in the reduction of hospitalization for HF in patients with DM. However, the pharmacological mechanism is not clear. To investigate the mechanisms of SGLT2 inhibitors in DM with HF, we performed target prediction and network analysis by a network pharmacology method. METHODS We selected targets of SGLT2 inhibitors and DM status with HF from databases and studies. The "Drug-Target" and "Drug-Target-Disease" networks were constructed using Cytoscape. Then the protein-protein interaction (PPI) was analyzed using the STRING database. Gene Ontology (GO) biological functions and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were performed to investigate using the Bioconductor tool for analysis. RESULTS There were 125 effective targets between SGLT2 inhibitors and DM status with HF. Through further screening, 33 core targets were obtained, including SRC, MAPK1, NARS, MAPK3 and EGFR. It was predicted that the Rap1 signaling pathway, MAPK signaling pathway, EGFR tyrosine kinase inhibitor resistance, AGE-RAGE signaling pathway in diabetic complications and other signaling pathways were involved in the treatment of DM with HF by SGLT2 inhibitors. CONCLUSION Our study elucidated the possible mechanisms of SGLT2 inhibitors from a systemic and holistic perspective based on pharmacological networks. The key targets and pathways will provide new insights for further research on the pharmacological mechanism of SGLT2 inhibitors in the treatment of DM with HF.
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12
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Shen Y, Ding W. Therapeutic Hypothermia Mitigates the Sepsis-Increased Permeability in EA. hy926 Cells by Preserving Rap1 Expression. Ther Hypothermia Temp Manag 2021; 11:201-207. [PMID: 33709787 DOI: 10.1089/ther.2020.0037] [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: 11/12/2022] Open
Abstract
To determine the effect and potential mechanisms of therapeutic hypothermia (TH) on the permeability of septic cells. Human EA. hy926 cells were transfected with, or without, control or ras-proximate-1 (Rap1)-specific siRNA and treated with 2 μg/mL of lipopolysaccharide (LPS). The cells were cultured in normal temperature (NT) or a temporary TH for 10 hours. The cellular permeability of each group of cells was determined by transwell permeability assay. The relative levels of Rap1, RhoA (a small GTP enzyme of the Rho family), VE-cadherin expression, and myosin light chain (MLC) phosphorylation were quantified by Western blot and immunofluorescent assays. Compared with the control group, LPS stimulation increased cellular permeability in EA. hy926 cells under an NT condition, but significantly mitigated by TH. The effect of TH decreased after Rap1 silencing. Furthermore, LPS upregulated RhoA expression and MLC phosphorylation, but reduced Rap1 and VE-cadherin expression, which were also enhanced by Rap1 silencing, but significantly mitigated by TH. Immunofluorescent analyses indicated that LPS significantly increased phosphorylated MLC, but decreased VE-cadherin expression, which were further deteriorated by Rap1 silencing, but significantly mitigated by TH in EA. hy926 cells. TH significantly mitigated the sepsis-increased permeability of EA. hy926 cells by enhancing the Rap1 expression to attenuate the RhoA/MLC signaling.
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Affiliation(s)
- Yuehong Shen
- Department of Burns, Second Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Wu Ding
- Department of Emergency Medicine, Second Hospital of Zhejiang University School of Medicine and Research Institute of Emergency Medicine, Zhejiang University, Hangzhou, China
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13
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Singh B, Kosuru R, Lakshmikanthan S, Sorci-Thomas M, Zhang D, Sparapani R, Vasquez-Vivar J, Chrzanowska M. Endothelial Rap1 (Ras-Association Proximate 1) Restricts Inflammatory Signaling to Protect From the Progression of Atherosclerosis. Arterioscler Thromb Vasc Biol 2021; 41:638-650. [PMID: 33267664 PMCID: PMC8105264 DOI: 10.1161/atvbaha.120.315401] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Small GTPase Rap1 (Ras-association proximate 1) is a novel, positive regulator of NO release and endothelial function with a potentially key role in mechanosensing of atheroprotective, laminar flow. Our objective was to delineate the role of Rap1 in the progression of atherosclerosis and its specific functions in the presence and absence of laminar flow, to better define its role in endothelial mechanisms contributing to plaque formation and atherogenesis. Approach and Results: In a mouse atherosclerosis model, endothelial Rap1B deletion exacerbates atherosclerotic plaque formation. In the thoracic aorta, where laminar shear stress-induced NO is otherwise atheroprotective, plaque area is increased in Athero-Rap1BiΔEC (atherogenic endothelial cell-specific, tamoxifen-inducible Rap1A+Rap1B knockout) mice. Endothelial Rap1 deficiency also leads to increased plaque size, leukocyte accumulation, and increased CAM (cell adhesion molecule) expression in atheroprone areas, whereas vascular permeability is unchanged. In endothelial cells, in the absence of protective laminar flow, Rap1 deficiency leads to an increased proinflammatory TNF-α (tumor necrosis factor alpha) signaling and increased NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) activation and elevated inflammatory receptor expression. Interestingly, this increased signaling to NF-κB activation is corrected by AKTVIII-an inhibitor of Akt (protein kinase B) translocation to the membrane. Together, these data implicate Rap1 in restricting Akt-dependent signaling, preventing excessive cytokine receptor signaling and proinflammatory NF-κB activation. CONCLUSIONS Via 2 distinct mechanisms, endothelial Rap1 protects from the atherosclerosis progression in the presence and absence of laminar flow; Rap1-stimulated NO release predominates in laminar flow, and restriction of proinflammatory signaling predominates in the absence of laminar flow. Our studies provide novel insights into the mechanisms underlying endothelial homeostasis and reveal the importance of Rap1 signaling in cardiovascular disease.
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Affiliation(s)
- Bandana Singh
- Blood Research Institute, Versiti, Milwaukee, Wisconsin
| | - Ramoji Kosuru
- Blood Research Institute, Versiti, Milwaukee, Wisconsin
| | | | - Mary Sorci-Thomas
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
- Division of Endocrinology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - David Zhang
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Rodney Sparapani
- Division of Biostatistics, Institute for Health and Equity, Medical College of Wisconsin, Milwaukee, Wisconsin
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jeannette Vasquez-Vivar
- Department of Biophysics and Redox Biology Program, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Magdalena Chrzanowska
- Blood Research Institute, Versiti, Milwaukee, Wisconsin
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin
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14
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Gladka MM, Kohela A, Molenaar B, Versteeg D, Kooijman L, Monshouwer-Kloots J, Kremer V, Vos HR, Huibers MMH, Haigh JJ, Huylebroeck D, Boon RA, Giacca M, van Rooij E. Cardiomyocytes stimulate angiogenesis after ischemic injury in a ZEB2-dependent manner. Nat Commun 2021; 12:84. [PMID: 33398012 PMCID: PMC7782784 DOI: 10.1038/s41467-020-20361-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/20/2020] [Indexed: 12/25/2022] Open
Abstract
The disruption in blood supply due to myocardial infarction is a critical determinant for infarct size and subsequent deterioration in function. The identification of factors that enhance cardiac repair by the restoration of the vascular network is, therefore, of great significance. Here, we show that the transcription factor Zinc finger E-box-binding homeobox 2 (ZEB2) is increased in stressed cardiomyocytes and induces a cardioprotective cross-talk between cardiomyocytes and endothelial cells to enhance angiogenesis after ischemia. Single-cell sequencing indicates ZEB2 to be enriched in injured cardiomyocytes. Cardiomyocyte-specific deletion of ZEB2 results in impaired cardiac contractility and infarct healing post-myocardial infarction (post-MI), while cardiomyocyte-specific ZEB2 overexpression improves cardiomyocyte survival and cardiac function. We identified Thymosin β4 (TMSB4) and Prothymosin α (PTMA) as main paracrine factors released from cardiomyocytes to stimulate angiogenesis by enhancing endothelial cell migration, and whose regulation is validated in our in vivo models. Therapeutic delivery of ZEB2 to cardiomyocytes in the infarcted heart induces the expression of TMSB4 and PTMA, which enhances angiogenesis and prevents cardiac dysfunction. These findings reveal ZEB2 as a beneficial factor during ischemic injury, which may hold promise for the identification of new therapies.
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Affiliation(s)
- Monika M Gladka
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
| | - Arwa Kohela
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
| | - Bas Molenaar
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
| | - Danielle Versteeg
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
- Department of Cardiology, University Medical Center, Utrecht, The Netherlands
| | - Lieneke Kooijman
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
| | - Jantine Monshouwer-Kloots
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands
| | - Veerle Kremer
- Department of Physiology, Amsterdam University Medical Center VU, Amsterdam, The Netherlands
- Department of Medical Biochemistry, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Harmjan R Vos
- Molecular Cancer Research, Center for Molecular Medicine, University Medical Center, Utrecht, The Netherlands
| | - Manon M H Huibers
- Department of Pathology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Jody J Haigh
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, Canada
| | - Danny Huylebroeck
- Department of Cell Biology, Erasmus University Medical Centre, Rotterdam, The Netherlands
- Department of Development and Regeneration, University of Leuven, Leuven, Belgium
| | - Reinier A Boon
- Department of Physiology, Amsterdam University Medical Center VU, Amsterdam, The Netherlands
- Institute for Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany
- German Center for Cardiovascular Research (DZHK), Frankfurt am Main, Germany
| | - Mauro Giacca
- School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - Eva van Rooij
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Centre, Utrecht, The Netherlands.
- Department of Cardiology, University Medical Center, Utrecht, The Netherlands.
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15
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Shi Q, Sun B, Wang D, Zhu Y, Zhao X, Yang X, Zhang Y. Circ6401, a novel circular RNA, is implicated in repair of the damaged endometrium by Wharton's jelly-derived mesenchymal stem cells through regulation of the miR-29b-1-5p/RAP1B axis. Stem Cell Res Ther 2020; 11:520. [PMID: 33261656 PMCID: PMC7708228 DOI: 10.1186/s13287-020-02027-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 11/13/2020] [Indexed: 02/08/2023] Open
Abstract
Background Accumulating evidence indicates that mesenchymal stem cells (MSCs) exert tissue repair effects and therapeutic angiogenesis through their noncoding RNAs (ncRNAs). Our previous studies showed that MSCs derived from Wharton’s jelly (WJ-MSCs) can ameliorate damaged human endometrium by promoting angiogenesis. There is limited information on the functions and mechanism of ncRNAs in MSC-induced endometrial repair, and additional studies are needed for more insights. Methods Here, WJ-MSCs were cocultured with or without endometrial stromal cells (ESCs) damaged by mifepristone (cocultured group versus non-cocultured group). TUNEL staining assays, EdU proliferation assays, flow cytometry apoptosis assays, and western blot assays were performed to observe the reparative effect of WJ-MSCs on damaged ESCs. Subsequently, circular RNA (circRNA) and microRNA microarrays were performed between the two groups. A subset of top upregulated circRNAs was validated by qRT-PCR. The functions of circ6401 (hsa_circ_0006401) in WJ-MSCs were investigated using lentivirus-mediated circRNA overexpression assays. The subcellular localization of circ6401 and miR-29b-1-5p in WJ-MSCs was identified by double RNA fluorescence in situ hybridization. Dual-luciferase reporter assays and western blot assays were performed to elucidate the regulatory mechanisms among circ6401, miR-29b-1-5p, and RAP1B. Results WJ-MSCs significantly improved ESC proliferation and upregulated the expression of vascular angiogenesis markers. Circ6401 was upregulated in WJ-MSCs cocultured with damaged ESCs, while miR-29b-1-5p was significantly downregulated. Furthermore, circ6401 was found to bind to miR-29b-1-5p and prevent it from decreasing the level of RAP1B, a crucial protein involved in the VEGF signaling pathway, which promoted angiogenesis and stimulated the proliferation of ESCs. Conclusions Our results showed the abundance and regulation profiles of ncRNAs of WJ-MSCs during repair of damaged ESCs and, for the first time, clarified the underlying mechanism by which circ6401 promotes endometrial repair by WJ-MSCs; thus, demonstrating that circ6401 may serve as a potential therapeutic target.
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Affiliation(s)
- Qin Shi
- Department of Obstetrics and Gynecology, Affiliated Hospital of Nantong University, 19 Xisi Road, Nantong, Jiangsu, 226000, People's Republic of China
| | - Baolan Sun
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Di Wang
- Center for Reproductive Medicine, Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Yi Zhu
- Affiliated Maternity and Child Health Care Hospital of Nantong University, Nantong, People's Republic of China
| | - Xinxin Zhao
- Department of Obstetrics and Gynecology, Affiliated Hospital of Nantong University, 19 Xisi Road, Nantong, Jiangsu, 226000, People's Republic of China
| | - Xiaoqing Yang
- Department of Obstetrics and Gynecology, Affiliated Hospital of Nantong University, 19 Xisi Road, Nantong, Jiangsu, 226000, People's Republic of China.
| | - Yuquan Zhang
- Department of Obstetrics and Gynecology, Affiliated Hospital of Nantong University, 19 Xisi Road, Nantong, Jiangsu, 226000, People's Republic of China.
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16
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Jeong JH, Ojha U, Lee YM. Pathological angiogenesis and inflammation in tissues. Arch Pharm Res 2020; 44:1-15. [PMID: 33230600 PMCID: PMC7682773 DOI: 10.1007/s12272-020-01287-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/13/2020] [Indexed: 12/12/2022]
Abstract
The role of angiogenesis in the growth of organs and tumors is widely recognized. Vascular-organ interaction is a key mechanism and a concept that enables an understanding of all biological phenomena and normal physiology that is essential for human survival under pathological conditions. Recently, vascular endothelial cells have been classified as a type of innate immune cells that are dependent on the pathological situations. Moreover, inflammatory cytokines and signaling regulators activated upon exposure to infection or various stresses play crucial roles in the pathological function of parenchymal cells, peripheral immune cells, stromal cells, and cancer cells in tissues. Therefore, vascular-organ interactions as a vascular microenvironment or tissue microenvironment under physiological and pathological conditions are gaining popularity as an interesting research topic. Here, we review vascular contribution as a major factor in microenvironment homeostasis in the pathogenesis of normal as well as cancerous tissues. Furthermore, we suggest that the normalization strategy of pathological angiogenesis could be a promising therapeutic target for various diseases, including cancer.
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Affiliation(s)
- Ji-Hak Jeong
- College of Pharmacy, Vessel-Organ Interaction Research Center (VOICE, MRC), Kyungpook National University, Daegu, 41566, Republic of Korea.,College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Uttam Ojha
- College of Pharmacy, Vessel-Organ Interaction Research Center (VOICE, MRC), Kyungpook National University, Daegu, 41566, Republic of Korea
| | - You Mie Lee
- College of Pharmacy, Vessel-Organ Interaction Research Center (VOICE, MRC), Kyungpook National University, Daegu, 41566, Republic of Korea. .,College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
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17
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Abe RJ, Savage H, Imanishi M, Banerjee P, Kotla S, Paez-Mayorga J, Taunton J, Fujiwara K, Won JH, Yusuf SW, Palaskas NL, Banchs J, Lin SH, Schadler KL, Abe JI, Le NT. p90RSK-MAGI1 Module Controls Endothelial Permeability by Post-translational Modifications of MAGI1 and Hippo Pathway. Front Cardiovasc Med 2020; 7:542485. [PMID: 33304925 PMCID: PMC7693647 DOI: 10.3389/fcvm.2020.542485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 10/15/2020] [Indexed: 01/05/2023] Open
Abstract
Previously, we reported that post-translational modifications (PTMs) of MAGI1, including S741 phosphorylation and K931 de-SUMOylation, both of which are regulated by p90RSK activation, lead to endothelial cell (EC) activation. However, roles for p90RSK and MAGI1-PTMs in regulating EC permeability remain unclear despite MAGI1 being a junctional molecule. Here, we show that thrombin (Thb)-induced EC permeability, detected by the electric cell-substrate impedance sensing (ECIS) based system, was decreased by overexpression of dominant negative p90RSK or a MAGI1-S741A phosphorylation mutant, but was accelerated by overexpression of p90RSK, siRNA-mediated knockdown of magi1, or the MAGI1-K931R SUMOylation mutant. MAGI1 depletion also increased the mRNA and protein expression of the large tumor suppressor kinases 1 and 2 (LATS1/2), which inhibited YAP/TAZ activity and increased EC permeability. Because the endothelial barrier is a critical mediator of tumor hypoxia, we also evaluated the role of p90RSK activation in tumor vessel leakiness by using a relatively low dose of the p90RSK specific inhibitor, FMK-MEA. FMK-MEA significantly inhibited tumor vessel leakiness at a dose that does not affect morphology and growth of tumor vessels in vivo. These results provide novel insights into crucial roles for p90RSK-mediated MAGI1 PTMs and the Hippo pathway in EC permeability, as well as p90RSK activation in tumor vessel leakiness.
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Affiliation(s)
- Rei J Abe
- Department of Cardiovascular Sciences, Center for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX, United States
| | - Hannah Savage
- Department of Pediatric Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Masaki Imanishi
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Priyanka Banerjee
- Department of Cardiovascular Sciences, Center for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX, United States
| | - Sivareddy Kotla
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jesus Paez-Mayorga
- Department of Cardiovascular Sciences, Center for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX, United States
| | - Jack Taunton
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA, United States
| | - Keigi Fujiwara
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jong Hak Won
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Syed Wamique Yusuf
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Nicolas L Palaskas
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jose Banchs
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Steven H Lin
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Keri L Schadler
- Department of Pediatric Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jun-Ichi Abe
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Nhat-Tu Le
- Department of Cardiovascular Sciences, Center for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX, United States
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18
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Integration of Rap1 and Calcium Signaling. Int J Mol Sci 2020; 21:ijms21051616. [PMID: 32120817 PMCID: PMC7084553 DOI: 10.3390/ijms21051616] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 02/07/2023] Open
Abstract
Ca2+ is a universal intracellular signal. The modulation of cytoplasmic Ca2+ concentration regulates a plethora of cellular processes, such as: synaptic plasticity, neuronal survival, chemotaxis of immune cells, platelet aggregation, vasodilation, and cardiac excitation–contraction coupling. Rap1 GTPases are ubiquitously expressed binary switches that alternate between active and inactive states and are regulated by diverse families of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs). Active Rap1 couples extracellular stimulation with intracellular signaling through secondary messengers—cyclic adenosine monophosphate (cAMP), Ca2+, and diacylglycerol (DAG). Much evidence indicates that Rap1 signaling intersects with Ca2+ signaling pathways to control the important cellular functions of platelet activation or neuronal plasticity. Rap1 acts as an effector of Ca2+ signaling when activated by mechanisms involving Ca2+ and DAG-activated (CalDAG-) GEFs. Conversely, activated by other GEFs, such as cAMP-dependent GEF Epac, Rap1 controls cytoplasmic Ca2+ levels. It does so by regulating the activity of Ca2+ signaling proteins such as sarcoendoplasmic reticulum Ca2+-ATPase (SERCA). In this review, we focus on the physiological significance of the links between Rap1 and Ca2+ signaling and emphasize the molecular interactions that may offer new targets for the therapy of Alzheimer’s disease, hypertension, and atherosclerosis, among other diseases.
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19
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Rap1 is Involved in Angiopoietin-1-Induced Cell-Cell Junction Stabilization and Endothelial Cell Sprouting. Cells 2020; 9:cells9010155. [PMID: 31936361 PMCID: PMC7016689 DOI: 10.3390/cells9010155] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/27/2019] [Accepted: 01/04/2020] [Indexed: 12/02/2022] Open
Abstract
Angiopoietin-1 (Ang-1) is an important proangiogenic factor also involved in the maintenance of endothelial-barrier integrity. The small GTPase Rap1 is involved in the regulation of adherens junctions through VE-cadherin-mediated adhesion, and in endothelial permeability. While many studies established that Rap1 activation is critical for endothelial cell–cell adhesions, its roles in the antipermeability effects of Ang-1 are ill-defined. Thus, we determined the contribution of Rap1 to Ang-1-stimulated angiogenic effects on endothelial cells (ECs). We found that Rap1 is activated following Ang-1 stimulation and is required for the antipermeability effects of Ang-1 on EC monolayers. Our results also revealed that Rap1 is necessary for EC sprouting stimulated by Ang-1 but had no significant effect on Ang-1-induced EC migration and adhesion. In contrast, downregulation of VE-cadherin markedly increased the adhesiveness of ECs to the substratum, which resulted in inhibition of Ang-1-stimulated migration. These results revealed that Rap1 is central to the effects of Ang-1 at intercellular junctions of ECs, whereas VE-cadherin is also involved in the adhesion of ECs to the extracellular matrix.
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20
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Wong JF, Mohan MD, Young EW, Simmons CA. Integrated electrochemical measurement of endothelial permeability in a 3D hydrogel-based microfluidic vascular model. Biosens Bioelectron 2020; 147:111757. [DOI: 10.1016/j.bios.2019.111757] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/23/2019] [Accepted: 10/01/2019] [Indexed: 12/14/2022]
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21
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Weighted Gene Coexpression Network Analysis Identified MicroRNA Coexpression Modules and Related Pathways in Type 2 Diabetes Mellitus. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9567641. [PMID: 31915515 PMCID: PMC6935443 DOI: 10.1155/2019/9567641] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/04/2019] [Accepted: 11/11/2019] [Indexed: 12/31/2022]
Abstract
Objective Type 2 diabetes mellitus (T2DM) is a metabolic disease with high incidence, which has seriously affected human life and health. MicroRNA, a short-chain noncoding RNA, plays an important role in T2DM. Identification of meaningful microRNA modules and the role of microRNAs provide a basis for searching potential biomarkers of T2DM. Materials and Methods In this study, three newly diagnosed patients with T2DM and three controls were selected for Whole Peripheral Blood RNA Sequencing to establish a microRNA library. Weighted gene coexpression network analysis (WGCNA) was applied to construct coexpression modules and to detect the trait-related microRNA modules; then, KEGG enrichment analysis was performed to predict the biological function of the interest modules, and candidate hub microRNAs were screened out by the value of module membership (MM) and protein-protein interaction (PPI) network. Result Four microRNA modules (blue, brown, magenta, and turquoise) were highly associated with the T2DM; the number of miRNAs in these modules ranged from 41 to 469. The Fc gamma R-mediated phagocytosis pathway, Rap1 signaling pathway, MAPK signaling pathway, and Lysosome pathway were common pathways in three of the four modules. RPS27A, UBC, and RAC1 were the top three proteins in our study; their corresponding RNAs were miR-1271-5p, miR-130a-3p, miR-130b-3p, and miR-574-3p. Conclusion In summary, this study identified blood miRNAs in human T2DM using RNA sequencing. The findings may be the foundation for understanding the potential role of miRNAs in T2DM.
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22
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Abstract
The endothelium physically separates blood from surrounding tissue and yet allows for the regulated passage of nutrients, waste, and leukocytes into and out of the circulation. Trans-endothelium flux occurs across endothelial cells (transcellular) and between endothelial cells (paracellular). Paracellular endothelial barrier function depends on the regulation of cell-cell junctions. Interestingly, a functional relationship between cell-cell junctions and cell-matrix adhesions has long been appreciated but the molecular mechanisms underpinning this relationship are not fully understood. Here we review the evidence that supports the notion that cell-matrix interactions contribute to the regulation of cell-cell junctions, focusing primarily on the important adherens junction protein VE-cadherin. In particular, we will discuss recent insights gained into how integrin signaling impacts VE-cadherin stability in adherens junctions and endothelial barrier function.
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Affiliation(s)
- Fadi E Pulous
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center (FEP, BGP) and Cancer Biology Graduate Program (FEP), Emory University School of Medicine, Atlanta, GA, USA
| | - Brian G Petrich
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center (FEP, BGP) and Cancer Biology Graduate Program (FEP), Emory University School of Medicine, Atlanta, GA, USA
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23
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Yu P, Song H, Gao J, Li B, Liu Y, Wang Y. Vitamin D (1,25-(OH) 2D 3) regulates the gene expression through competing endogenous RNAs networks in high glucose-treated endothelial progenitor cells. J Steroid Biochem Mol Biol 2019; 193:105425. [PMID: 31302220 DOI: 10.1016/j.jsbmb.2019.105425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/05/2019] [Accepted: 07/07/2019] [Indexed: 02/08/2023]
Abstract
Vitamin D (vit-D) supplementation can improve endothelial cell function in type 2 diabetes mellitus patients with vit-D insufficiency or deficiency. In the present study, we aimed to compare the expression profiles of circRNAs, lncRNAs, miRNAs, and mRNAs between 1,25-(OH)2D3-treated endothelial progenitor cells (EPCs) and control cells, and to further construct the 1,25-(OH)2D3-regulated ceRNA networks in EPCs. RNA sequencing was performed on the 1,25-(OH)2D3-treated EPCs and control cells derived from the bone marrow (BM). Bioinformatics analyses were performed to identify differentially expressed (DE) microRNAs (miRNAs), circular RNAs (circRNAs), mRNAs, and long non-coding RNAs (lncRNAs). Then Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were conducted to predict the function of genes. Competing endogenous RNA (ceRNA) networks were constructed with Cytoscape software. 1,25-(OH)2D3 application induced changes in the expression profiles of 1791 mRNAs, 2726 lncRNAs, 205 circRNAs, and 45 miRNAs in EPCs treated with high levels of glucose. These DE RNAs were associated with MMP and GTPase activities, specific signaling pathways, and components of actin, extracellular matrix, or adherens junction. DE circRNAs, which functioned independently of their linear host genes, interacted with miRNAs to serve as miRNA sponges in complex ceRNA networks. The data indicated that circRNAs and lncRNAs comprised ceRNAs to sponge effects of miRNAs on the expressions of mRNAs following 1,25-(OH)2D3 application in EPCs. 1,25-(OH)2D3 improved the function of EPCs via associated ceRNA interaction networks in diabetes patients.
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Affiliation(s)
- Ping Yu
- Department of Endocrinology, Shenzhen Samii Medical Center, Shenzhen, 518000, China; Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China.
| | - Haiyan Song
- Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Jiaxin Gao
- Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Bo Li
- Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Ying Liu
- Department of Endocrinology, Daqing People's Hospital (The Fifth Affiliated Hospital of Harbin Medical University), Daqing, 163316, China
| | - Yanhe Wang
- Department of Endocrinology, Shenzhen Samii Medical Center, Shenzhen, 518000, China; Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
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24
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Boone DR, Weisz HA, Willey HE, Torres KEO, Falduto MT, Sinha M, Spratt H, Bolding IJ, Johnson KM, Parsley MA, DeWitt DS, Prough DS, Hellmich HL. Traumatic brain injury induces long-lasting changes in immune and regenerative signaling. PLoS One 2019; 14:e0214741. [PMID: 30943276 PMCID: PMC6447179 DOI: 10.1371/journal.pone.0214741] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 03/19/2019] [Indexed: 12/19/2022] Open
Abstract
There are no existing treatments for the long-term degenerative effects of traumatic brain injury (TBI). This is due, in part, to our limited understanding of chronic TBI and uncertainty about which proposed mechanisms for long-term neurodegeneration are amenable to treatment with existing or novel drugs. Here, we used microarray and pathway analyses to interrogate TBI-induced gene expression in the rat hippocampus and cortex at several acute, subchronic and chronic intervals (24 hours, 2 weeks, 1, 2, 3, 6 and 12 months) after parasagittal fluid percussion injury. We used Ingenuity pathway analysis (IPA) and Gene Ontology enrichment analysis to identify significantly expressed genes and prominent cell signaling pathways that are dysregulated weeks to months after TBI and potentially amenable to therapeutic modulation. We noted long-term, coordinated changes in expression of genes belonging to canonical pathways associated with the innate immune response (i.e., NF-κB signaling, NFAT signaling, Complement System, Acute Phase Response, Toll-like receptor signaling, and Neuroinflammatory signaling). Bioinformatic analysis suggested that dysregulation of these immune mediators—many are key hub genes—would compromise multiple cell signaling pathways essential for homeostatic brain function, particularly those involved in cell survival and neuroplasticity. Importantly, the temporal profile of beneficial and maladaptive immunoregulatory genes in the weeks to months after the initial TBI suggests wider therapeutic windows than previously indicated.
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Affiliation(s)
- Deborah R. Boone
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Harris A. Weisz
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Hannah E. Willey
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | | | - Michael T. Falduto
- GenUs Biosystems, Northbrook, Illinois, United States of America
- Paradise Genomics, Inc., Northbrook, Illinois, United States of America
| | - Mala Sinha
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Heidi Spratt
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Ian J. Bolding
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Kathea M. Johnson
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Margaret A. Parsley
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Douglas S. DeWitt
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Donald S. Prough
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Helen L. Hellmich
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas, United States of America
- * E-mail:
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25
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Wong JF, Simmons CA. Microfluidic assay for the on-chip electrochemical measurement of cell monolayer permeability. LAB ON A CHIP 2019; 19:1060-1070. [PMID: 30778462 DOI: 10.1039/c8lc01321g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cell monolayers, including endothelial cells lining the vasculature and blood-brain barrier, and epithelial cells lining the lung airways and gut, form a semipermeable barrier across which transport of biomolecules is tightly regulated. The assessment of barrier function is therefore critical in in vitro models of barrier-forming tissues, including microfluidic organ-on-a-chip models. Cell monolayer barrier function is commonly assessed using a fluorescent tracer-based permeability assay in both conventional Transwell and organ-on-a-chip models, but this method requires laborious manual sampling, bulky instrumentation and offline sample processing. In this work, we introduce a novel on-chip microfluidic permeability assay that replaces the traditional fluorescent tracer with an electroactive tracer. Similar to methods such as TEER, the electrochemical permeability assay eliminates the need for manual sampling and complex optical instrumentation. We validated the method by demonstrating close agreement between experimental and numerically-simulated diffusive and convective transport in the microfluidic device. Different electroactive tracers were screened for efficient electron transfer, stability and inertness relative to the cell monolayer. The assay was then used to measure the permeability of endothelial cells cultured under both static and flow culture conditions, and after exposure to a permeability mediator. In summary, the electrochemical permeability assay combines the simplicity of tracer-based permeability methods with the benefits of on-chip integration, which will ultimately facilitate the robust multiparametric characterization of barrier function in microfluidic organs-on-chips.
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Affiliation(s)
- Jeremy F Wong
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
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26
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Gao JR, Qin XJ, Fang ZH, Han LP, Guo MF, Jiang NN. To Explore the Pathogenesis of Vascular Lesion of Type 2 Diabetes Mellitus Based on the PI3K/Akt Signaling Pathway. J Diabetes Res 2019; 2019:4650906. [PMID: 31179340 PMCID: PMC6501128 DOI: 10.1155/2019/4650906] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 03/03/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) has become a chronic disease, serious harm to human health. Complications of the blood pipe are the main cause of disability and death in diabetic patients, including vascular lesions that directly affects the prognosis of patients with diabetes and survival. This study was to determine the influence of high glucose and related mechanism of vascular lesion of type 2 diabetes mellitus pathogenesis. METHODS In vivo aorta abdominalis of GK rats was observed with blood pressure, heart rate, hematoxylin and eosin (H&E), Masson, and Verhoeff staining. In vitro cells were cultured with 30 mM glucose for 24 h. RT-QPCR was used to detect the mRNA expression of endothelial markers PTEN, PI3K, Akt, and VEGF. Immunofluorescence staining was used to detect the expression of PTEN, PI3K, Akt, and VEGF. PI3K and Akt phosphorylation levels were detected by Western blot analysis. RESULTS Heart rate, systolic blood pressure, diastolic blood pressure, and mean blood pressure in the GK control group were higher compared with the Wistar control group and no difference compared with the GK experimental model group. Fluorescence intensity of VEGF, Akt, and PI3K in the high-sugar stimulus group was stronger than the control group; PTEN in the high-sugar stimulus group was weakening than the control group. VEGF, Akt, and PI3K mRNA in the high-sugar stimulus group were higher than the control group; protein expressions of VEGF, Akt, and PI3K in the high-sugar stimulus group were higher than the control group. PTEN mRNA in the high-sugar stimulus group was lower than the control group. Protein expression of PTEN in the high-sugar stimulus group was lower than the control group. CONCLUSIONS Angiogenesis is an important pathogenesis of T2DM vascular disease, and PTEN plays a negative regulatory role in the development of new blood vessels and can inhibit the PI3K/Akt signaling pathway.
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Affiliation(s)
- Jia-Rong Gao
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
| | - Xiu-Juan Qin
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
| | - Zhao-Hui Fang
- Department of Nephrology, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
| | - Li-Ping Han
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
| | - Ming-Fei Guo
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
| | - Nan-Nan Jiang
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei, China
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27
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Yang L, Zhang Y, Ma Y, Du J, Gu L, Zheng L, Zhang X. Effect of melatonin on EGF- and VEGF-induced monolayer permeability of HUVECs. Am J Physiol Heart Circ Physiol 2018; 316:H1178-H1191. [PMID: 30575440 DOI: 10.1152/ajpheart.00542.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Melatonin is a natural hormone involved in the regulation of circadian rhythm, immunity, and cardiovascular function. In the present study, we focused on the mechanism of melatonin in the regulation of vascular permeability. We found that melatonin could inhibit both VEGF- and EGF-induced monolayer permeability of human umbilical vein endothelial cells (HUVECs) and change the tyrosine phosphorylation of vascular-endothelial (VE-)cadherin, which was related to endothelial barrier function. In addition, phospho-AKT (Ser473) and phospho-ERK(1/2) played significant roles in the regulation of VE-cadherin phosphorylation. Both the phosphatidylinositol 3-kinase/AKT inhibitor LY49002 and MEK/ERK inhibitor U0126 could inhibit the permeability of HUVECs, but with different effects on tyrosine phosphorylation of VE-cadherin. Melatonin can influence the two growth factor-induced phosphorylation of AKT (Ser473) but not ERK(1/2). Our results show that melatonin can inhibit growth factor-induced monolayer permeability of HUVECs by influencing the phosphorylation of AKT and VE-cadherin. Melatonin can be a potential treatment for diseases associated with abnormal vascular permeability. NEW & NOTEWORTHY We found that melatonin could inhibit both EGF- and VEGF-induced monolayer permeability of human umbilical vein endothelial cells, which is related to phosphorylation of vascular-endothelial cadherin. Blockade of phosphatidylinositol 3-kinase/AKT and MEK/ERK pathways could inhibit the permeability of human umbilical vein endothelial cells, and phosphorylation of AKT (Ser473) might be a critical event in the changing of monolayer permeability and likely has cross-talk with the MEK/ERK pathway.
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Affiliation(s)
- Ling Yang
- Department of Cardiology, The Third Affiliated Hospital of Soochow University , Changzhou, Jiangsu , China
| | - Yujie Zhang
- Department of Physiology, Nanjing Medical University , Nanjing, Jiangsu , China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University , Nanjing, Jiangsu , China
| | - Yadong Ma
- Department of Physiology, Nanjing Medical University , Nanjing, Jiangsu , China
| | - Jun Du
- Department of Physiology, Nanjing Medical University , Nanjing, Jiangsu , China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University , Nanjing, Jiangsu , China
| | - Luo Gu
- Department of Physiology, Nanjing Medical University , Nanjing, Jiangsu , China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University , Nanjing, Jiangsu , China
| | - Lu Zheng
- General Laboratory, The Third Affiliated Hospital of Soochow University , Changzhou, Jiangsu , China
| | - Xiaoying Zhang
- Department of Cardiothoracic surgery and the General Laboratory, The Third Affiliated Hospital of Soochow University , Changzhou, Jiangsu , China
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28
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Shimizu A, Zankov DP, Kurokawa-Seo M, Ogita H. Vascular Endothelial Growth Factor-A Exerts Diverse Cellular Effects via Small G Proteins, Rho and Rap. Int J Mol Sci 2018; 19:ijms19041203. [PMID: 29659486 PMCID: PMC5979568 DOI: 10.3390/ijms19041203] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/03/2018] [Accepted: 04/12/2018] [Indexed: 12/18/2022] Open
Abstract
Vascular endothelial growth factors (VEGFs) include five molecules (VEGF-A, -B, -C, -D, and placental growth factor), and have various roles that crucially regulate cellular functions in many kinds of cells and tissues. Intracellular signal transduction induced by VEGFs has been extensively studied and is usually initiated by their binding to two classes of transmembrane receptors: receptor tyrosine kinase VEGF receptors (VEGF receptor-1, -2 and -3) and neuropilins (NRP1 and NRP2). In addition to many established results reported by other research groups, we have previously identified small G proteins, especially Ras homologue gene (Rho) and Ras-related protein (Rap), as important mediators of VEGF-A-stimulated signaling in cancer cells as well as endothelial cells. This review article describes the VEGF-A-induced signaling pathways underlying diverse cellular functions, including cell proliferation, migration, and angiogenesis, and the involvement of Rho, Rap, and their related molecules in these pathways.
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Affiliation(s)
- Akio Shimizu
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
| | - Dimitar P Zankov
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
| | - Misuzu Kurokawa-Seo
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan.
| | - Hisakazu Ogita
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
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